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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Driver for BCM6358 memory-mapped LEDs, based on leds-syscon.c
*
* Copyright 2015 Álvaro Fernández Rojas <[email protected]>
*/
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/spinlock.h>
#define BCM6358_REG_MODE 0x0
#define BCM6358_REG_CTRL 0x4
#define BCM6358_SLED_CLKDIV_MASK 3
#define BCM6358_SLED_CLKDIV_1 0
#define BCM6358_SLED_CLKDIV_2 1
#define BCM6358_SLED_CLKDIV_4 2
#define BCM6358_SLED_CLKDIV_8 3
#define BCM6358_SLED_POLARITY BIT(2)
#define BCM6358_SLED_BUSY BIT(3)
#define BCM6358_SLED_MAX_COUNT 32
#define BCM6358_SLED_WAIT 100
/**
* struct bcm6358_led - state container for bcm6358 based LEDs
* @cdev: LED class device for this LED
* @mem: memory resource
* @lock: memory lock
* @pin: LED pin number
* @active_low: LED is active low
*/
struct bcm6358_led {
struct led_classdev cdev;
void __iomem *mem;
spinlock_t *lock;
unsigned long pin;
bool active_low;
};
static void bcm6358_led_write(void __iomem *reg, unsigned long data)
{
#ifdef CONFIG_CPU_BIG_ENDIAN
iowrite32be(data, reg);
#else
writel(data, reg);
#endif
}
static unsigned long bcm6358_led_read(void __iomem *reg)
{
#ifdef CONFIG_CPU_BIG_ENDIAN
return ioread32be(reg);
#else
return readl(reg);
#endif
}
static unsigned long bcm6358_led_busy(void __iomem *mem)
{
unsigned long val;
while ((val = bcm6358_led_read(mem + BCM6358_REG_CTRL)) &
BCM6358_SLED_BUSY)
udelay(BCM6358_SLED_WAIT);
return val;
}
static void bcm6358_led_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
struct bcm6358_led *led =
container_of(led_cdev, struct bcm6358_led, cdev);
unsigned long flags, val;
spin_lock_irqsave(led->lock, flags);
bcm6358_led_busy(led->mem);
val = bcm6358_led_read(led->mem + BCM6358_REG_MODE);
if ((led->active_low && value == LED_OFF) ||
(!led->active_low && value != LED_OFF))
val |= BIT(led->pin);
else
val &= ~(BIT(led->pin));
bcm6358_led_write(led->mem + BCM6358_REG_MODE, val);
spin_unlock_irqrestore(led->lock, flags);
}
static int bcm6358_led(struct device *dev, struct device_node *nc, u32 reg,
void __iomem *mem, spinlock_t *lock)
{
struct led_init_data init_data = {};
struct bcm6358_led *led;
enum led_default_state state;
unsigned long val;
int rc;
led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL);
if (!led)
return -ENOMEM;
led->pin = reg;
led->mem = mem;
led->lock = lock;
if (of_property_read_bool(nc, "active-low"))
led->active_low = true;
init_data.fwnode = of_fwnode_handle(nc);
state = led_init_default_state_get(init_data.fwnode);
switch (state) {
case LEDS_DEFSTATE_ON:
led->cdev.brightness = LED_FULL;
break;
case LEDS_DEFSTATE_KEEP:
val = bcm6358_led_read(led->mem + BCM6358_REG_MODE);
val &= BIT(led->pin);
if ((led->active_low && !val) || (!led->active_low && val))
led->cdev.brightness = LED_FULL;
else
led->cdev.brightness = LED_OFF;
break;
default:
led->cdev.brightness = LED_OFF;
}
bcm6358_led_set(&led->cdev, led->cdev.brightness);
led->cdev.brightness_set = bcm6358_led_set;
rc = devm_led_classdev_register_ext(dev, &led->cdev, &init_data);
if (rc < 0)
return rc;
dev_dbg(dev, "registered LED %s\n", led->cdev.name);
return 0;
}
static int bcm6358_leds_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev_of_node(&pdev->dev);
struct device_node *child;
void __iomem *mem;
spinlock_t *lock; /* memory lock */
unsigned long val;
u32 clk_div;
mem = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(mem))
return PTR_ERR(mem);
lock = devm_kzalloc(dev, sizeof(*lock), GFP_KERNEL);
if (!lock)
return -ENOMEM;
spin_lock_init(lock);
val = bcm6358_led_busy(mem);
val &= ~(BCM6358_SLED_POLARITY | BCM6358_SLED_CLKDIV_MASK);
if (of_property_read_bool(np, "brcm,clk-dat-low"))
val |= BCM6358_SLED_POLARITY;
of_property_read_u32(np, "brcm,clk-div", &clk_div);
switch (clk_div) {
case 8:
val |= BCM6358_SLED_CLKDIV_8;
break;
case 4:
val |= BCM6358_SLED_CLKDIV_4;
break;
case 2:
val |= BCM6358_SLED_CLKDIV_2;
break;
default:
val |= BCM6358_SLED_CLKDIV_1;
break;
}
bcm6358_led_write(mem + BCM6358_REG_CTRL, val);
for_each_available_child_of_node(np, child) {
int rc;
u32 reg;
if (of_property_read_u32(child, "reg", ®))
continue;
if (reg >= BCM6358_SLED_MAX_COUNT) {
dev_err(dev, "invalid LED (%u >= %d)\n", reg,
BCM6358_SLED_MAX_COUNT);
continue;
}
rc = bcm6358_led(dev, child, reg, mem, lock);
if (rc < 0) {
of_node_put(child);
return rc;
}
}
return 0;
}
static const struct of_device_id bcm6358_leds_of_match[] = {
{ .compatible = "brcm,bcm6358-leds", },
{ },
};
MODULE_DEVICE_TABLE(of, bcm6358_leds_of_match);
static struct platform_driver bcm6358_leds_driver = {
.probe = bcm6358_leds_probe,
.driver = {
.name = "leds-bcm6358",
.of_match_table = bcm6358_leds_of_match,
},
};
module_platform_driver(bcm6358_leds_driver);
MODULE_AUTHOR("Álvaro Fernández Rojas <[email protected]>");
MODULE_DESCRIPTION("LED driver for BCM6358 controllers");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:leds-bcm6358");
| linux-master | drivers/leds/leds-bcm6358.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* TI LP8860 4-Channel LED Driver
*
* Copyright (C) 2014 Texas Instruments
*
* Author: Dan Murphy <[email protected]>
*/
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/leds.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/gpio/consumer.h>
#include <linux/slab.h>
#define LP8860_DISP_CL1_BRT_MSB 0x00
#define LP8860_DISP_CL1_BRT_LSB 0x01
#define LP8860_DISP_CL1_CURR_MSB 0x02
#define LP8860_DISP_CL1_CURR_LSB 0x03
#define LP8860_CL2_BRT_MSB 0x04
#define LP8860_CL2_BRT_LSB 0x05
#define LP8860_CL2_CURRENT 0x06
#define LP8860_CL3_BRT_MSB 0x07
#define LP8860_CL3_BRT_LSB 0x08
#define LP8860_CL3_CURRENT 0x09
#define LP8860_CL4_BRT_MSB 0x0a
#define LP8860_CL4_BRT_LSB 0x0b
#define LP8860_CL4_CURRENT 0x0c
#define LP8860_CONFIG 0x0d
#define LP8860_STATUS 0x0e
#define LP8860_FAULT 0x0f
#define LP8860_LED_FAULT 0x10
#define LP8860_FAULT_CLEAR 0x11
#define LP8860_ID 0x12
#define LP8860_TEMP_MSB 0x13
#define LP8860_TEMP_LSB 0x14
#define LP8860_DISP_LED_CURR_MSB 0x15
#define LP8860_DISP_LED_CURR_LSB 0x16
#define LP8860_DISP_LED_PWM_MSB 0x17
#define LP8860_DISP_LED_PWM_LSB 0x18
#define LP8860_EEPROM_CNTRL 0x19
#define LP8860_EEPROM_UNLOCK 0x1a
#define LP8860_EEPROM_REG_0 0x60
#define LP8860_EEPROM_REG_1 0x61
#define LP8860_EEPROM_REG_2 0x62
#define LP8860_EEPROM_REG_3 0x63
#define LP8860_EEPROM_REG_4 0x64
#define LP8860_EEPROM_REG_5 0x65
#define LP8860_EEPROM_REG_6 0x66
#define LP8860_EEPROM_REG_7 0x67
#define LP8860_EEPROM_REG_8 0x68
#define LP8860_EEPROM_REG_9 0x69
#define LP8860_EEPROM_REG_10 0x6a
#define LP8860_EEPROM_REG_11 0x6b
#define LP8860_EEPROM_REG_12 0x6c
#define LP8860_EEPROM_REG_13 0x6d
#define LP8860_EEPROM_REG_14 0x6e
#define LP8860_EEPROM_REG_15 0x6f
#define LP8860_EEPROM_REG_16 0x70
#define LP8860_EEPROM_REG_17 0x71
#define LP8860_EEPROM_REG_18 0x72
#define LP8860_EEPROM_REG_19 0x73
#define LP8860_EEPROM_REG_20 0x74
#define LP8860_EEPROM_REG_21 0x75
#define LP8860_EEPROM_REG_22 0x76
#define LP8860_EEPROM_REG_23 0x77
#define LP8860_EEPROM_REG_24 0x78
#define LP8860_LOCK_EEPROM 0x00
#define LP8860_UNLOCK_EEPROM 0x01
#define LP8860_PROGRAM_EEPROM 0x02
#define LP8860_EEPROM_CODE_1 0x08
#define LP8860_EEPROM_CODE_2 0xba
#define LP8860_EEPROM_CODE_3 0xef
#define LP8860_CLEAR_FAULTS 0x01
#define LP8860_NAME "lp8860"
/**
* struct lp8860_led
* @lock: Lock for reading/writing the device
* @client: Pointer to the I2C client
* @led_dev: led class device pointer
* @regmap: Devices register map
* @eeprom_regmap: EEPROM register map
* @enable_gpio: VDDIO/EN gpio to enable communication interface
* @regulator: LED supply regulator pointer
*/
struct lp8860_led {
struct mutex lock;
struct i2c_client *client;
struct led_classdev led_dev;
struct regmap *regmap;
struct regmap *eeprom_regmap;
struct gpio_desc *enable_gpio;
struct regulator *regulator;
};
struct lp8860_eeprom_reg {
uint8_t reg;
uint8_t value;
};
static struct lp8860_eeprom_reg lp8860_eeprom_disp_regs[] = {
{ LP8860_EEPROM_REG_0, 0xed },
{ LP8860_EEPROM_REG_1, 0xdf },
{ LP8860_EEPROM_REG_2, 0xdc },
{ LP8860_EEPROM_REG_3, 0xf0 },
{ LP8860_EEPROM_REG_4, 0xdf },
{ LP8860_EEPROM_REG_5, 0xe5 },
{ LP8860_EEPROM_REG_6, 0xf2 },
{ LP8860_EEPROM_REG_7, 0x77 },
{ LP8860_EEPROM_REG_8, 0x77 },
{ LP8860_EEPROM_REG_9, 0x71 },
{ LP8860_EEPROM_REG_10, 0x3f },
{ LP8860_EEPROM_REG_11, 0xb7 },
{ LP8860_EEPROM_REG_12, 0x17 },
{ LP8860_EEPROM_REG_13, 0xef },
{ LP8860_EEPROM_REG_14, 0xb0 },
{ LP8860_EEPROM_REG_15, 0x87 },
{ LP8860_EEPROM_REG_16, 0xce },
{ LP8860_EEPROM_REG_17, 0x72 },
{ LP8860_EEPROM_REG_18, 0xe5 },
{ LP8860_EEPROM_REG_19, 0xdf },
{ LP8860_EEPROM_REG_20, 0x35 },
{ LP8860_EEPROM_REG_21, 0x06 },
{ LP8860_EEPROM_REG_22, 0xdc },
{ LP8860_EEPROM_REG_23, 0x88 },
{ LP8860_EEPROM_REG_24, 0x3E },
};
static int lp8860_unlock_eeprom(struct lp8860_led *led, int lock)
{
int ret;
mutex_lock(&led->lock);
if (lock == LP8860_UNLOCK_EEPROM) {
ret = regmap_write(led->regmap,
LP8860_EEPROM_UNLOCK,
LP8860_EEPROM_CODE_1);
if (ret) {
dev_err(&led->client->dev, "EEPROM Unlock failed\n");
goto out;
}
ret = regmap_write(led->regmap,
LP8860_EEPROM_UNLOCK,
LP8860_EEPROM_CODE_2);
if (ret) {
dev_err(&led->client->dev, "EEPROM Unlock failed\n");
goto out;
}
ret = regmap_write(led->regmap,
LP8860_EEPROM_UNLOCK,
LP8860_EEPROM_CODE_3);
if (ret) {
dev_err(&led->client->dev, "EEPROM Unlock failed\n");
goto out;
}
} else {
ret = regmap_write(led->regmap,
LP8860_EEPROM_UNLOCK,
LP8860_LOCK_EEPROM);
}
out:
mutex_unlock(&led->lock);
return ret;
}
static int lp8860_fault_check(struct lp8860_led *led)
{
int ret, fault;
unsigned int read_buf;
ret = regmap_read(led->regmap, LP8860_LED_FAULT, &read_buf);
if (ret)
goto out;
fault = read_buf;
ret = regmap_read(led->regmap, LP8860_FAULT, &read_buf);
if (ret)
goto out;
fault |= read_buf;
/* Attempt to clear any faults */
if (fault)
ret = regmap_write(led->regmap, LP8860_FAULT_CLEAR,
LP8860_CLEAR_FAULTS);
out:
return ret;
}
static int lp8860_brightness_set(struct led_classdev *led_cdev,
enum led_brightness brt_val)
{
struct lp8860_led *led =
container_of(led_cdev, struct lp8860_led, led_dev);
int disp_brightness = brt_val * 255;
int ret;
mutex_lock(&led->lock);
ret = lp8860_fault_check(led);
if (ret) {
dev_err(&led->client->dev, "Cannot read/clear faults\n");
goto out;
}
ret = regmap_write(led->regmap, LP8860_DISP_CL1_BRT_MSB,
(disp_brightness & 0xff00) >> 8);
if (ret) {
dev_err(&led->client->dev, "Cannot write CL1 MSB\n");
goto out;
}
ret = regmap_write(led->regmap, LP8860_DISP_CL1_BRT_LSB,
disp_brightness & 0xff);
if (ret) {
dev_err(&led->client->dev, "Cannot write CL1 LSB\n");
goto out;
}
out:
mutex_unlock(&led->lock);
return ret;
}
static int lp8860_init(struct lp8860_led *led)
{
unsigned int read_buf;
int ret, i, reg_count;
if (led->regulator) {
ret = regulator_enable(led->regulator);
if (ret) {
dev_err(&led->client->dev,
"Failed to enable regulator\n");
return ret;
}
}
gpiod_direction_output(led->enable_gpio, 1);
ret = lp8860_fault_check(led);
if (ret)
goto out;
ret = regmap_read(led->regmap, LP8860_STATUS, &read_buf);
if (ret)
goto out;
ret = lp8860_unlock_eeprom(led, LP8860_UNLOCK_EEPROM);
if (ret) {
dev_err(&led->client->dev, "Failed unlocking EEPROM\n");
goto out;
}
reg_count = ARRAY_SIZE(lp8860_eeprom_disp_regs) / sizeof(lp8860_eeprom_disp_regs[0]);
for (i = 0; i < reg_count; i++) {
ret = regmap_write(led->eeprom_regmap,
lp8860_eeprom_disp_regs[i].reg,
lp8860_eeprom_disp_regs[i].value);
if (ret) {
dev_err(&led->client->dev, "Failed writing EEPROM\n");
goto out;
}
}
ret = lp8860_unlock_eeprom(led, LP8860_LOCK_EEPROM);
if (ret)
goto out;
ret = regmap_write(led->regmap,
LP8860_EEPROM_CNTRL,
LP8860_PROGRAM_EEPROM);
if (ret) {
dev_err(&led->client->dev, "Failed programming EEPROM\n");
goto out;
}
return ret;
out:
if (ret)
gpiod_direction_output(led->enable_gpio, 0);
if (led->regulator) {
ret = regulator_disable(led->regulator);
if (ret)
dev_err(&led->client->dev,
"Failed to disable regulator\n");
}
return ret;
}
static const struct reg_default lp8860_reg_defs[] = {
{ LP8860_DISP_CL1_BRT_MSB, 0x00},
{ LP8860_DISP_CL1_BRT_LSB, 0x00},
{ LP8860_DISP_CL1_CURR_MSB, 0x00},
{ LP8860_DISP_CL1_CURR_LSB, 0x00},
{ LP8860_CL2_BRT_MSB, 0x00},
{ LP8860_CL2_BRT_LSB, 0x00},
{ LP8860_CL2_CURRENT, 0x00},
{ LP8860_CL3_BRT_MSB, 0x00},
{ LP8860_CL3_BRT_LSB, 0x00},
{ LP8860_CL3_CURRENT, 0x00},
{ LP8860_CL4_BRT_MSB, 0x00},
{ LP8860_CL4_BRT_LSB, 0x00},
{ LP8860_CL4_CURRENT, 0x00},
{ LP8860_CONFIG, 0x00},
{ LP8860_FAULT_CLEAR, 0x00},
{ LP8860_EEPROM_CNTRL, 0x80},
{ LP8860_EEPROM_UNLOCK, 0x00},
};
static const struct regmap_config lp8860_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = LP8860_EEPROM_UNLOCK,
.reg_defaults = lp8860_reg_defs,
.num_reg_defaults = ARRAY_SIZE(lp8860_reg_defs),
.cache_type = REGCACHE_NONE,
};
static const struct reg_default lp8860_eeprom_defs[] = {
{ LP8860_EEPROM_REG_0, 0x00 },
{ LP8860_EEPROM_REG_1, 0x00 },
{ LP8860_EEPROM_REG_2, 0x00 },
{ LP8860_EEPROM_REG_3, 0x00 },
{ LP8860_EEPROM_REG_4, 0x00 },
{ LP8860_EEPROM_REG_5, 0x00 },
{ LP8860_EEPROM_REG_6, 0x00 },
{ LP8860_EEPROM_REG_7, 0x00 },
{ LP8860_EEPROM_REG_8, 0x00 },
{ LP8860_EEPROM_REG_9, 0x00 },
{ LP8860_EEPROM_REG_10, 0x00 },
{ LP8860_EEPROM_REG_11, 0x00 },
{ LP8860_EEPROM_REG_12, 0x00 },
{ LP8860_EEPROM_REG_13, 0x00 },
{ LP8860_EEPROM_REG_14, 0x00 },
{ LP8860_EEPROM_REG_15, 0x00 },
{ LP8860_EEPROM_REG_16, 0x00 },
{ LP8860_EEPROM_REG_17, 0x00 },
{ LP8860_EEPROM_REG_18, 0x00 },
{ LP8860_EEPROM_REG_19, 0x00 },
{ LP8860_EEPROM_REG_20, 0x00 },
{ LP8860_EEPROM_REG_21, 0x00 },
{ LP8860_EEPROM_REG_22, 0x00 },
{ LP8860_EEPROM_REG_23, 0x00 },
{ LP8860_EEPROM_REG_24, 0x00 },
};
static const struct regmap_config lp8860_eeprom_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = LP8860_EEPROM_REG_24,
.reg_defaults = lp8860_eeprom_defs,
.num_reg_defaults = ARRAY_SIZE(lp8860_eeprom_defs),
.cache_type = REGCACHE_NONE,
};
static int lp8860_probe(struct i2c_client *client)
{
int ret;
struct lp8860_led *led;
struct device_node *np = dev_of_node(&client->dev);
struct device_node *child_node;
struct led_init_data init_data = {};
led = devm_kzalloc(&client->dev, sizeof(*led), GFP_KERNEL);
if (!led)
return -ENOMEM;
child_node = of_get_next_available_child(np, NULL);
if (!child_node)
return -EINVAL;
led->enable_gpio = devm_gpiod_get_optional(&client->dev,
"enable", GPIOD_OUT_LOW);
if (IS_ERR(led->enable_gpio)) {
ret = PTR_ERR(led->enable_gpio);
dev_err(&client->dev, "Failed to get enable gpio: %d\n", ret);
return ret;
}
led->regulator = devm_regulator_get(&client->dev, "vled");
if (IS_ERR(led->regulator))
led->regulator = NULL;
led->client = client;
led->led_dev.brightness_set_blocking = lp8860_brightness_set;
mutex_init(&led->lock);
i2c_set_clientdata(client, led);
led->regmap = devm_regmap_init_i2c(client, &lp8860_regmap_config);
if (IS_ERR(led->regmap)) {
ret = PTR_ERR(led->regmap);
dev_err(&client->dev, "Failed to allocate register map: %d\n",
ret);
return ret;
}
led->eeprom_regmap = devm_regmap_init_i2c(client, &lp8860_eeprom_regmap_config);
if (IS_ERR(led->eeprom_regmap)) {
ret = PTR_ERR(led->eeprom_regmap);
dev_err(&client->dev, "Failed to allocate register map: %d\n",
ret);
return ret;
}
ret = lp8860_init(led);
if (ret)
return ret;
init_data.fwnode = of_fwnode_handle(child_node);
init_data.devicename = LP8860_NAME;
init_data.default_label = ":display_cluster";
ret = devm_led_classdev_register_ext(&client->dev, &led->led_dev,
&init_data);
if (ret) {
dev_err(&client->dev, "led register err: %d\n", ret);
return ret;
}
return 0;
}
static void lp8860_remove(struct i2c_client *client)
{
struct lp8860_led *led = i2c_get_clientdata(client);
int ret;
gpiod_direction_output(led->enable_gpio, 0);
if (led->regulator) {
ret = regulator_disable(led->regulator);
if (ret)
dev_err(&led->client->dev,
"Failed to disable regulator\n");
}
mutex_destroy(&led->lock);
}
static const struct i2c_device_id lp8860_id[] = {
{ "lp8860", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, lp8860_id);
static const struct of_device_id of_lp8860_leds_match[] = {
{ .compatible = "ti,lp8860", },
{},
};
MODULE_DEVICE_TABLE(of, of_lp8860_leds_match);
static struct i2c_driver lp8860_driver = {
.driver = {
.name = "lp8860",
.of_match_table = of_lp8860_leds_match,
},
.probe = lp8860_probe,
.remove = lp8860_remove,
.id_table = lp8860_id,
};
module_i2c_driver(lp8860_driver);
MODULE_DESCRIPTION("Texas Instruments LP8860 LED driver");
MODULE_AUTHOR("Dan Murphy <[email protected]>");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/leds-lp8860.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* LED driver for TI lp3952 controller
*
* Copyright (C) 2016, DAQRI, LLC.
* Author: Tony Makkiel <[email protected]>
*/
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/leds.h>
#include <linux/leds-lp3952.h>
#include <linux/module.h>
#include <linux/notifier.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/reboot.h>
#include <linux/regmap.h>
static int lp3952_register_write(struct i2c_client *client, u8 reg, u8 val)
{
int ret;
struct lp3952_led_array *priv = i2c_get_clientdata(client);
ret = regmap_write(priv->regmap, reg, val);
if (ret)
dev_err(&client->dev, "%s: reg 0x%x, val 0x%x, err %d\n",
__func__, reg, val, ret);
return ret;
}
static void lp3952_on_off(struct lp3952_led_array *priv,
enum lp3952_leds led_id, bool on)
{
int ret, val;
dev_dbg(&priv->client->dev, "%s LED %d to %d\n", __func__, led_id, on);
val = 1 << led_id;
if (led_id == LP3952_LED_ALL)
val = LP3952_LED_MASK_ALL;
ret = regmap_update_bits(priv->regmap, LP3952_REG_LED_CTRL, val,
on ? val : 0);
if (ret)
dev_err(&priv->client->dev, "%s, Error %d\n", __func__, ret);
}
/*
* Using Imax to control brightness. There are 4 possible
* setting 25, 50, 75 and 100 % of Imax. Possible values are
* values 0-4. 0 meaning turn off.
*/
static int lp3952_set_brightness(struct led_classdev *cdev,
enum led_brightness value)
{
unsigned int reg, shift_val;
struct lp3952_ctrl_hdl *led = container_of(cdev,
struct lp3952_ctrl_hdl,
cdev);
struct lp3952_led_array *priv = (struct lp3952_led_array *)led->priv;
dev_dbg(cdev->dev, "Brightness request: %d on %d\n", value,
led->channel);
if (value == LED_OFF) {
lp3952_on_off(priv, led->channel, false);
return 0;
}
if (led->channel > LP3952_RED_1) {
dev_err(cdev->dev, " %s Invalid LED requested", __func__);
return -EINVAL;
}
if (led->channel >= LP3952_BLUE_1) {
reg = LP3952_REG_RGB1_MAX_I_CTRL;
shift_val = (led->channel - LP3952_BLUE_1) * 2;
} else {
reg = LP3952_REG_RGB2_MAX_I_CTRL;
shift_val = led->channel * 2;
}
/* Enable the LED in case it is not enabled already */
lp3952_on_off(priv, led->channel, true);
return regmap_update_bits(priv->regmap, reg, 3 << shift_val,
--value << shift_val);
}
static int lp3952_get_label(struct device *dev, const char *label, char *dest)
{
int ret;
const char *str;
ret = device_property_read_string(dev, label, &str);
if (ret)
return ret;
strncpy(dest, str, LP3952_LABEL_MAX_LEN);
return 0;
}
static int lp3952_register_led_classdev(struct lp3952_led_array *priv)
{
int i, acpi_ret, ret = -ENODEV;
static const char *led_name_hdl[LP3952_LED_ALL] = {
"blue2",
"green2",
"red2",
"blue1",
"green1",
"red1"
};
for (i = 0; i < LP3952_LED_ALL; i++) {
acpi_ret = lp3952_get_label(&priv->client->dev, led_name_hdl[i],
priv->leds[i].name);
if (acpi_ret)
continue;
priv->leds[i].cdev.name = priv->leds[i].name;
priv->leds[i].cdev.brightness = LED_OFF;
priv->leds[i].cdev.max_brightness = LP3952_BRIGHT_MAX;
priv->leds[i].cdev.brightness_set_blocking =
lp3952_set_brightness;
priv->leds[i].channel = i;
priv->leds[i].priv = priv;
ret = devm_led_classdev_register(&priv->client->dev,
&priv->leds[i].cdev);
if (ret < 0) {
dev_err(&priv->client->dev,
"couldn't register LED %s\n",
priv->leds[i].cdev.name);
break;
}
}
return ret;
}
static int lp3952_set_pattern_gen_cmd(struct lp3952_led_array *priv,
u8 cmd_index, u8 r, u8 g, u8 b,
enum lp3952_tt tt, enum lp3952_cet cet)
{
int ret;
struct ptrn_gen_cmd line = {
{
{
.r = r,
.g = g,
.b = b,
.cet = cet,
.tt = tt
}
}
};
if (cmd_index >= LP3952_CMD_REG_COUNT)
return -EINVAL;
ret = lp3952_register_write(priv->client,
LP3952_REG_CMD_0 + cmd_index * 2,
line.bytes.msb);
if (ret)
return ret;
return lp3952_register_write(priv->client,
LP3952_REG_CMD_0 + cmd_index * 2 + 1,
line.bytes.lsb);
}
static int lp3952_configure(struct lp3952_led_array *priv)
{
int ret;
/* Disable any LEDs on from any previous conf. */
ret = lp3952_register_write(priv->client, LP3952_REG_LED_CTRL, 0);
if (ret)
return ret;
/* enable rgb patter, loop */
ret = lp3952_register_write(priv->client, LP3952_REG_PAT_GEN_CTRL,
LP3952_PATRN_LOOP | LP3952_PATRN_GEN_EN);
if (ret)
return ret;
/* Update Bit 6 (Active mode), Select both Led sets, Bit [1:0] */
ret = lp3952_register_write(priv->client, LP3952_REG_ENABLES,
LP3952_ACTIVE_MODE | LP3952_INT_B00ST_LDR);
if (ret)
return ret;
/* Set Cmd1 for RGB intensity,cmd and transition time */
return lp3952_set_pattern_gen_cmd(priv, 0, I46, I71, I100, TT0,
CET197);
}
static const struct regmap_config lp3952_regmap = {
.reg_bits = 8,
.val_bits = 8,
.max_register = REG_MAX,
.cache_type = REGCACHE_RBTREE,
};
static int lp3952_probe(struct i2c_client *client)
{
int status;
struct lp3952_led_array *priv;
priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->client = client;
priv->enable_gpio = devm_gpiod_get(&client->dev, "nrst",
GPIOD_OUT_HIGH);
if (IS_ERR(priv->enable_gpio)) {
status = PTR_ERR(priv->enable_gpio);
dev_err(&client->dev, "Failed to enable gpio: %d\n", status);
return status;
}
priv->regmap = devm_regmap_init_i2c(client, &lp3952_regmap);
if (IS_ERR(priv->regmap)) {
int err = PTR_ERR(priv->regmap);
dev_err(&client->dev, "Failed to allocate register map: %d\n",
err);
return err;
}
i2c_set_clientdata(client, priv);
status = lp3952_configure(priv);
if (status) {
dev_err(&client->dev, "Probe failed. Device not found (%d)\n",
status);
return status;
}
status = lp3952_register_led_classdev(priv);
if (status) {
dev_err(&client->dev, "Unable to register led_classdev: %d\n",
status);
return status;
}
return 0;
}
static void lp3952_remove(struct i2c_client *client)
{
struct lp3952_led_array *priv;
priv = i2c_get_clientdata(client);
lp3952_on_off(priv, LP3952_LED_ALL, false);
gpiod_set_value(priv->enable_gpio, 0);
}
static const struct i2c_device_id lp3952_id[] = {
{LP3952_NAME, 0},
{}
};
MODULE_DEVICE_TABLE(i2c, lp3952_id);
static struct i2c_driver lp3952_i2c_driver = {
.driver = {
.name = LP3952_NAME,
},
.probe = lp3952_probe,
.remove = lp3952_remove,
.id_table = lp3952_id,
};
module_i2c_driver(lp3952_i2c_driver);
MODULE_AUTHOR("Tony Makkiel <[email protected]>");
MODULE_DESCRIPTION("lp3952 I2C LED controller driver");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/leds-lp3952.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* LEDs driver for Freescale MC13783/MC13892/MC34708
*
* Copyright (C) 2010 Philippe Rétornaz
*
* Based on leds-da903x:
* Copyright (C) 2008 Compulab, Ltd.
* Mike Rapoport <[email protected]>
*
* Copyright (C) 2006-2008 Marvell International Ltd.
* Eric Miao <[email protected]>
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/leds.h>
#include <linux/of.h>
#include <linux/mfd/mc13xxx.h>
struct mc13xxx_led_devtype {
int led_min;
int led_max;
int num_regs;
u32 ledctrl_base;
};
struct mc13xxx_led {
struct led_classdev cdev;
int id;
struct mc13xxx_leds *leds;
};
struct mc13xxx_leds {
struct mc13xxx *master;
struct mc13xxx_led_devtype *devtype;
int num_leds;
struct mc13xxx_led *led;
};
static unsigned int mc13xxx_max_brightness(int id)
{
if (id >= MC13783_LED_MD && id <= MC13783_LED_KP)
return 0x0f;
else if (id >= MC13783_LED_R1 && id <= MC13783_LED_B3)
return 0x1f;
return 0x3f;
}
static int mc13xxx_led_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
struct mc13xxx_led *led =
container_of(led_cdev, struct mc13xxx_led, cdev);
struct mc13xxx_leds *leds = led->leds;
unsigned int reg, bank, off, shift;
switch (led->id) {
case MC13783_LED_MD:
case MC13783_LED_AD:
case MC13783_LED_KP:
reg = 2;
shift = 9 + (led->id - MC13783_LED_MD) * 4;
break;
case MC13783_LED_R1:
case MC13783_LED_G1:
case MC13783_LED_B1:
case MC13783_LED_R2:
case MC13783_LED_G2:
case MC13783_LED_B2:
case MC13783_LED_R3:
case MC13783_LED_G3:
case MC13783_LED_B3:
off = led->id - MC13783_LED_R1;
bank = off / 3;
reg = 3 + bank;
shift = (off - bank * 3) * 5 + 6;
break;
case MC13892_LED_MD:
case MC13892_LED_AD:
case MC13892_LED_KP:
off = led->id - MC13892_LED_MD;
reg = off / 2;
shift = 3 + (off - reg * 2) * 12;
break;
case MC13892_LED_R:
case MC13892_LED_G:
case MC13892_LED_B:
off = led->id - MC13892_LED_R;
bank = off / 2;
reg = 2 + bank;
shift = (off - bank * 2) * 12 + 3;
break;
case MC34708_LED_R:
case MC34708_LED_G:
reg = 0;
shift = 3 + (led->id - MC34708_LED_R) * 12;
break;
default:
BUG();
}
return mc13xxx_reg_rmw(leds->master, leds->devtype->ledctrl_base + reg,
mc13xxx_max_brightness(led->id) << shift,
value << shift);
}
#ifdef CONFIG_OF
static struct mc13xxx_leds_platform_data __init *mc13xxx_led_probe_dt(
struct platform_device *pdev)
{
struct mc13xxx_leds *leds = platform_get_drvdata(pdev);
struct mc13xxx_leds_platform_data *pdata;
struct device_node *parent, *child;
struct device *dev = &pdev->dev;
int i = 0, ret = -ENODATA;
pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return ERR_PTR(-ENOMEM);
parent = of_get_child_by_name(dev_of_node(dev->parent), "leds");
if (!parent)
goto out_node_put;
ret = of_property_read_u32_array(parent, "led-control",
pdata->led_control,
leds->devtype->num_regs);
if (ret)
goto out_node_put;
pdata->num_leds = of_get_available_child_count(parent);
pdata->led = devm_kcalloc(dev, pdata->num_leds, sizeof(*pdata->led),
GFP_KERNEL);
if (!pdata->led) {
ret = -ENOMEM;
goto out_node_put;
}
for_each_available_child_of_node(parent, child) {
const char *str;
u32 tmp;
if (of_property_read_u32(child, "reg", &tmp))
continue;
pdata->led[i].id = leds->devtype->led_min + tmp;
if (!of_property_read_string(child, "label", &str))
pdata->led[i].name = str;
if (!of_property_read_string(child, "linux,default-trigger",
&str))
pdata->led[i].default_trigger = str;
i++;
}
pdata->num_leds = i;
ret = i > 0 ? 0 : -ENODATA;
out_node_put:
of_node_put(parent);
return ret ? ERR_PTR(ret) : pdata;
}
#else
static inline struct mc13xxx_leds_platform_data __init *mc13xxx_led_probe_dt(
struct platform_device *pdev)
{
return ERR_PTR(-ENOSYS);
}
#endif
static int __init mc13xxx_led_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct mc13xxx_leds_platform_data *pdata = dev_get_platdata(dev);
struct mc13xxx *mcdev = dev_get_drvdata(dev->parent);
struct mc13xxx_led_devtype *devtype =
(struct mc13xxx_led_devtype *)pdev->id_entry->driver_data;
struct mc13xxx_leds *leds;
int i, id, ret = -ENODATA;
u32 init_led = 0;
leds = devm_kzalloc(dev, sizeof(*leds), GFP_KERNEL);
if (!leds)
return -ENOMEM;
leds->devtype = devtype;
leds->master = mcdev;
platform_set_drvdata(pdev, leds);
if (dev_of_node(dev->parent)) {
pdata = mc13xxx_led_probe_dt(pdev);
if (IS_ERR(pdata))
return PTR_ERR(pdata);
} else if (!pdata)
return -ENODATA;
leds->num_leds = pdata->num_leds;
if ((leds->num_leds < 1) ||
(leds->num_leds > (devtype->led_max - devtype->led_min + 1))) {
dev_err(dev, "Invalid LED count %d\n", leds->num_leds);
return -EINVAL;
}
leds->led = devm_kcalloc(dev, leds->num_leds, sizeof(*leds->led),
GFP_KERNEL);
if (!leds->led)
return -ENOMEM;
for (i = 0; i < devtype->num_regs; i++) {
ret = mc13xxx_reg_write(mcdev, leds->devtype->ledctrl_base + i,
pdata->led_control[i]);
if (ret)
return ret;
}
for (i = 0; i < leds->num_leds; i++) {
const char *name, *trig;
ret = -EINVAL;
id = pdata->led[i].id;
name = pdata->led[i].name;
trig = pdata->led[i].default_trigger;
if ((id > devtype->led_max) || (id < devtype->led_min)) {
dev_err(dev, "Invalid ID %i\n", id);
break;
}
if (init_led & (1 << id)) {
dev_warn(dev, "LED %i already initialized\n", id);
break;
}
init_led |= 1 << id;
leds->led[i].id = id;
leds->led[i].leds = leds;
leds->led[i].cdev.name = name;
leds->led[i].cdev.default_trigger = trig;
leds->led[i].cdev.flags = LED_CORE_SUSPENDRESUME;
leds->led[i].cdev.brightness_set_blocking = mc13xxx_led_set;
leds->led[i].cdev.max_brightness = mc13xxx_max_brightness(id);
ret = led_classdev_register(dev->parent, &leds->led[i].cdev);
if (ret) {
dev_err(dev, "Failed to register LED %i\n", id);
break;
}
}
if (ret)
while (--i >= 0)
led_classdev_unregister(&leds->led[i].cdev);
return ret;
}
static int mc13xxx_led_remove(struct platform_device *pdev)
{
struct mc13xxx_leds *leds = platform_get_drvdata(pdev);
int i;
for (i = 0; i < leds->num_leds; i++)
led_classdev_unregister(&leds->led[i].cdev);
return 0;
}
static const struct mc13xxx_led_devtype mc13783_led_devtype = {
.led_min = MC13783_LED_MD,
.led_max = MC13783_LED_B3,
.num_regs = 6,
.ledctrl_base = 51,
};
static const struct mc13xxx_led_devtype mc13892_led_devtype = {
.led_min = MC13892_LED_MD,
.led_max = MC13892_LED_B,
.num_regs = 4,
.ledctrl_base = 51,
};
static const struct mc13xxx_led_devtype mc34708_led_devtype = {
.led_min = MC34708_LED_R,
.led_max = MC34708_LED_G,
.num_regs = 1,
.ledctrl_base = 54,
};
static const struct platform_device_id mc13xxx_led_id_table[] = {
{ "mc13783-led", (kernel_ulong_t)&mc13783_led_devtype, },
{ "mc13892-led", (kernel_ulong_t)&mc13892_led_devtype, },
{ "mc34708-led", (kernel_ulong_t)&mc34708_led_devtype, },
{ }
};
MODULE_DEVICE_TABLE(platform, mc13xxx_led_id_table);
static struct platform_driver mc13xxx_led_driver = {
.driver = {
.name = "mc13xxx-led",
},
.remove = mc13xxx_led_remove,
.id_table = mc13xxx_led_id_table,
};
module_platform_driver_probe(mc13xxx_led_driver, mc13xxx_led_probe);
MODULE_DESCRIPTION("LEDs driver for Freescale MC13XXX PMIC");
MODULE_AUTHOR("Philippe Retornaz <[email protected]>");
MODULE_LICENSE("GPL");
| linux-master | drivers/leds/leds-mc13783.c |
// SPDX-License-Identifier: GPL-2.0
//
// Copyright (C) 2018 BayLibre SAS
// Author: Bartosz Golaszewski <[email protected]>
//
// LED driver for MAXIM 77650/77651 charger/power-supply.
#include <linux/i2c.h>
#include <linux/leds.h>
#include <linux/mfd/max77650.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#define MAX77650_LED_NUM_LEDS 3
#define MAX77650_LED_A_BASE 0x40
#define MAX77650_LED_B_BASE 0x43
#define MAX77650_LED_BR_MASK GENMASK(4, 0)
#define MAX77650_LED_EN_MASK GENMASK(7, 6)
#define MAX77650_LED_MAX_BRIGHTNESS MAX77650_LED_BR_MASK
/* Enable EN_LED_MSTR. */
#define MAX77650_LED_TOP_DEFAULT BIT(0)
#define MAX77650_LED_ENABLE GENMASK(7, 6)
#define MAX77650_LED_DISABLE 0x00
#define MAX77650_LED_A_DEFAULT MAX77650_LED_DISABLE
/* 100% on duty */
#define MAX77650_LED_B_DEFAULT GENMASK(3, 0)
struct max77650_led {
struct led_classdev cdev;
struct regmap *map;
unsigned int regA;
unsigned int regB;
};
static struct max77650_led *max77650_to_led(struct led_classdev *cdev)
{
return container_of(cdev, struct max77650_led, cdev);
}
static int max77650_led_brightness_set(struct led_classdev *cdev,
enum led_brightness brightness)
{
struct max77650_led *led = max77650_to_led(cdev);
int val, mask;
mask = MAX77650_LED_BR_MASK | MAX77650_LED_EN_MASK;
if (brightness == LED_OFF)
val = MAX77650_LED_DISABLE;
else
val = MAX77650_LED_ENABLE | brightness;
return regmap_update_bits(led->map, led->regA, mask, val);
}
static int max77650_led_probe(struct platform_device *pdev)
{
struct fwnode_handle *child;
struct max77650_led *leds, *led;
struct device *dev;
struct regmap *map;
int rv, num_leds;
u32 reg;
dev = &pdev->dev;
leds = devm_kcalloc(dev, sizeof(*leds),
MAX77650_LED_NUM_LEDS, GFP_KERNEL);
if (!leds)
return -ENOMEM;
map = dev_get_regmap(dev->parent, NULL);
if (!map)
return -ENODEV;
num_leds = device_get_child_node_count(dev);
if (!num_leds || num_leds > MAX77650_LED_NUM_LEDS)
return -ENODEV;
device_for_each_child_node(dev, child) {
struct led_init_data init_data = {};
rv = fwnode_property_read_u32(child, "reg", ®);
if (rv || reg >= MAX77650_LED_NUM_LEDS) {
rv = -EINVAL;
goto err_node_put;
}
led = &leds[reg];
led->map = map;
led->regA = MAX77650_LED_A_BASE + reg;
led->regB = MAX77650_LED_B_BASE + reg;
led->cdev.brightness_set_blocking = max77650_led_brightness_set;
led->cdev.max_brightness = MAX77650_LED_MAX_BRIGHTNESS;
init_data.fwnode = child;
init_data.devicename = "max77650";
/* for backwards compatibility if `label` is not present */
init_data.default_label = ":";
rv = devm_led_classdev_register_ext(dev, &led->cdev,
&init_data);
if (rv)
goto err_node_put;
rv = regmap_write(map, led->regA, MAX77650_LED_A_DEFAULT);
if (rv)
goto err_node_put;
rv = regmap_write(map, led->regB, MAX77650_LED_B_DEFAULT);
if (rv)
goto err_node_put;
}
return regmap_write(map,
MAX77650_REG_CNFG_LED_TOP,
MAX77650_LED_TOP_DEFAULT);
err_node_put:
fwnode_handle_put(child);
return rv;
}
static const struct of_device_id max77650_led_of_match[] = {
{ .compatible = "maxim,max77650-led" },
{ }
};
MODULE_DEVICE_TABLE(of, max77650_led_of_match);
static struct platform_driver max77650_led_driver = {
.driver = {
.name = "max77650-led",
.of_match_table = max77650_led_of_match,
},
.probe = max77650_led_probe,
};
module_platform_driver(max77650_led_driver);
MODULE_DESCRIPTION("MAXIM 77650/77651 LED driver");
MODULE_AUTHOR("Bartosz Golaszewski <[email protected]>");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:max77650-led");
| linux-master | drivers/leds/leds-max77650.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* LEDs driver for Analog Devices ADP5520/ADP5501 MFD PMICs
*
* Copyright 2009 Analog Devices Inc.
*
* Loosely derived from leds-da903x:
* Copyright (C) 2008 Compulab, Ltd.
* Mike Rapoport <[email protected]>
*
* Copyright (C) 2006-2008 Marvell International Ltd.
* Eric Miao <[email protected]>
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/leds.h>
#include <linux/mfd/adp5520.h>
#include <linux/slab.h>
struct adp5520_led {
struct led_classdev cdev;
struct device *master;
int id;
int flags;
};
static int adp5520_led_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
struct adp5520_led *led;
led = container_of(led_cdev, struct adp5520_led, cdev);
return adp5520_write(led->master, ADP5520_LED1_CURRENT + led->id - 1,
value >> 2);
}
static int adp5520_led_setup(struct adp5520_led *led)
{
struct device *dev = led->master;
int flags = led->flags;
int ret = 0;
switch (led->id) {
case FLAG_ID_ADP5520_LED1_ADP5501_LED0:
ret |= adp5520_set_bits(dev, ADP5520_LED_TIME,
(flags >> ADP5520_FLAG_OFFT_SHIFT) &
ADP5520_FLAG_OFFT_MASK);
ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL,
ADP5520_LED1_EN);
break;
case FLAG_ID_ADP5520_LED2_ADP5501_LED1:
ret |= adp5520_set_bits(dev, ADP5520_LED_TIME,
((flags >> ADP5520_FLAG_OFFT_SHIFT) &
ADP5520_FLAG_OFFT_MASK) << 2);
ret |= adp5520_clr_bits(dev, ADP5520_LED_CONTROL,
ADP5520_R3_MODE);
ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL,
ADP5520_LED2_EN);
break;
case FLAG_ID_ADP5520_LED3_ADP5501_LED2:
ret |= adp5520_set_bits(dev, ADP5520_LED_TIME,
((flags >> ADP5520_FLAG_OFFT_SHIFT) &
ADP5520_FLAG_OFFT_MASK) << 4);
ret |= adp5520_clr_bits(dev, ADP5520_LED_CONTROL,
ADP5520_C3_MODE);
ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL,
ADP5520_LED3_EN);
break;
}
return ret;
}
static int adp5520_led_prepare(struct platform_device *pdev)
{
struct adp5520_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
struct device *dev = pdev->dev.parent;
int ret = 0;
ret |= adp5520_write(dev, ADP5520_LED1_CURRENT, 0);
ret |= adp5520_write(dev, ADP5520_LED2_CURRENT, 0);
ret |= adp5520_write(dev, ADP5520_LED3_CURRENT, 0);
ret |= adp5520_write(dev, ADP5520_LED_TIME, pdata->led_on_time << 6);
ret |= adp5520_write(dev, ADP5520_LED_FADE, FADE_VAL(pdata->fade_in,
pdata->fade_out));
return ret;
}
static int adp5520_led_probe(struct platform_device *pdev)
{
struct adp5520_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
struct adp5520_led *led, *led_dat;
struct led_info *cur_led;
int ret, i;
if (pdata == NULL) {
dev_err(&pdev->dev, "missing platform data\n");
return -ENODEV;
}
if (pdata->num_leds > ADP5520_01_MAXLEDS) {
dev_err(&pdev->dev, "can't handle more than %d LEDS\n",
ADP5520_01_MAXLEDS);
return -EFAULT;
}
led = devm_kcalloc(&pdev->dev, pdata->num_leds, sizeof(*led),
GFP_KERNEL);
if (!led)
return -ENOMEM;
ret = adp5520_led_prepare(pdev);
if (ret) {
dev_err(&pdev->dev, "failed to write\n");
return ret;
}
for (i = 0; i < pdata->num_leds; ++i) {
cur_led = &pdata->leds[i];
led_dat = &led[i];
led_dat->cdev.name = cur_led->name;
led_dat->cdev.default_trigger = cur_led->default_trigger;
led_dat->cdev.brightness_set_blocking = adp5520_led_set;
led_dat->cdev.brightness = LED_OFF;
if (cur_led->flags & ADP5520_FLAG_LED_MASK)
led_dat->flags = cur_led->flags;
else
led_dat->flags = i + 1;
led_dat->id = led_dat->flags & ADP5520_FLAG_LED_MASK;
led_dat->master = pdev->dev.parent;
ret = led_classdev_register(led_dat->master, &led_dat->cdev);
if (ret) {
dev_err(&pdev->dev, "failed to register LED %d\n",
led_dat->id);
goto err;
}
ret = adp5520_led_setup(led_dat);
if (ret) {
dev_err(&pdev->dev, "failed to write\n");
i++;
goto err;
}
}
platform_set_drvdata(pdev, led);
return 0;
err:
if (i > 0) {
for (i = i - 1; i >= 0; i--)
led_classdev_unregister(&led[i].cdev);
}
return ret;
}
static int adp5520_led_remove(struct platform_device *pdev)
{
struct adp5520_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
struct adp5520_led *led;
int i;
led = platform_get_drvdata(pdev);
adp5520_clr_bits(led->master, ADP5520_LED_CONTROL,
ADP5520_LED1_EN | ADP5520_LED2_EN | ADP5520_LED3_EN);
for (i = 0; i < pdata->num_leds; i++) {
led_classdev_unregister(&led[i].cdev);
}
return 0;
}
static struct platform_driver adp5520_led_driver = {
.driver = {
.name = "adp5520-led",
},
.probe = adp5520_led_probe,
.remove = adp5520_led_remove,
};
module_platform_driver(adp5520_led_driver);
MODULE_AUTHOR("Michael Hennerich <[email protected]>");
MODULE_DESCRIPTION("LEDS ADP5520(01) Driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:adp5520-led");
| linux-master | drivers/leds/leds-adp5520.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* MEN 14F021P00 Board Management Controller (BMC) LEDs Driver.
*
* This is the core LED driver of the MEN 14F021P00 BMC.
* There are four LEDs available which can be switched on and off.
* STATUS LED, HOT SWAP LED, USER LED 1, USER LED 2
*
* Copyright (C) 2014 MEN Mikro Elektronik Nuernberg GmbH
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/leds.h>
#include <linux/i2c.h>
#define BMC_CMD_LED_GET_SET 0xA0
#define BMC_BIT_LED_STATUS BIT(0)
#define BMC_BIT_LED_HOTSWAP BIT(1)
#define BMC_BIT_LED_USER1 BIT(2)
#define BMC_BIT_LED_USER2 BIT(3)
struct menf21bmc_led {
struct led_classdev cdev;
u8 led_bit;
const char *name;
struct i2c_client *i2c_client;
};
static struct menf21bmc_led leds[] = {
{
.name = "menf21bmc:led_status",
.led_bit = BMC_BIT_LED_STATUS,
},
{
.name = "menf21bmc:led_hotswap",
.led_bit = BMC_BIT_LED_HOTSWAP,
},
{
.name = "menf21bmc:led_user1",
.led_bit = BMC_BIT_LED_USER1,
},
{
.name = "menf21bmc:led_user2",
.led_bit = BMC_BIT_LED_USER2,
}
};
static DEFINE_MUTEX(led_lock);
static void
menf21bmc_led_set(struct led_classdev *led_cdev, enum led_brightness value)
{
int led_val;
struct menf21bmc_led *led = container_of(led_cdev,
struct menf21bmc_led, cdev);
mutex_lock(&led_lock);
led_val = i2c_smbus_read_byte_data(led->i2c_client,
BMC_CMD_LED_GET_SET);
if (led_val < 0)
goto err_out;
if (value == LED_OFF)
led_val &= ~led->led_bit;
else
led_val |= led->led_bit;
i2c_smbus_write_byte_data(led->i2c_client,
BMC_CMD_LED_GET_SET, led_val);
err_out:
mutex_unlock(&led_lock);
}
static int menf21bmc_led_probe(struct platform_device *pdev)
{
int i;
int ret;
struct i2c_client *i2c_client = to_i2c_client(pdev->dev.parent);
for (i = 0; i < ARRAY_SIZE(leds); i++) {
leds[i].cdev.name = leds[i].name;
leds[i].cdev.brightness_set = menf21bmc_led_set;
leds[i].i2c_client = i2c_client;
ret = devm_led_classdev_register(&pdev->dev, &leds[i].cdev);
if (ret < 0) {
dev_err(&pdev->dev, "failed to register LED device\n");
return ret;
}
}
dev_info(&pdev->dev, "MEN 140F21P00 BMC LED device enabled\n");
return 0;
}
static struct platform_driver menf21bmc_led = {
.probe = menf21bmc_led_probe,
.driver = {
.name = "menf21bmc_led",
},
};
module_platform_driver(menf21bmc_led);
MODULE_AUTHOR("Andreas Werner <[email protected]>");
MODULE_DESCRIPTION("MEN 14F021P00 BMC led driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:menf21bmc_led");
| linux-master | drivers/leds/leds-menf21bmc.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* leds-netxbig.c - Driver for the 2Big and 5Big Network series LEDs
*
* Copyright (C) 2010 LaCie
*
* Author: Simon Guinot <[email protected]>
*/
#include <linux/module.h>
#include <linux/irq.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/platform_device.h>
#include <linux/gpio/consumer.h>
#include <linux/leds.h>
#include <linux/of.h>
#include <linux/of_platform.h>
struct netxbig_gpio_ext {
struct gpio_desc **addr;
int num_addr;
struct gpio_desc **data;
int num_data;
struct gpio_desc *enable;
};
enum netxbig_led_mode {
NETXBIG_LED_OFF,
NETXBIG_LED_ON,
NETXBIG_LED_SATA,
NETXBIG_LED_TIMER1,
NETXBIG_LED_TIMER2,
NETXBIG_LED_MODE_NUM,
};
#define NETXBIG_LED_INVALID_MODE NETXBIG_LED_MODE_NUM
struct netxbig_led_timer {
unsigned long delay_on;
unsigned long delay_off;
enum netxbig_led_mode mode;
};
struct netxbig_led {
const char *name;
const char *default_trigger;
int mode_addr;
int *mode_val;
int bright_addr;
int bright_max;
};
struct netxbig_led_platform_data {
struct netxbig_gpio_ext *gpio_ext;
struct netxbig_led_timer *timer;
int num_timer;
struct netxbig_led *leds;
int num_leds;
};
/*
* GPIO extension bus.
*/
static DEFINE_SPINLOCK(gpio_ext_lock);
static void gpio_ext_set_addr(struct netxbig_gpio_ext *gpio_ext, int addr)
{
int pin;
for (pin = 0; pin < gpio_ext->num_addr; pin++)
gpiod_set_value(gpio_ext->addr[pin], (addr >> pin) & 1);
}
static void gpio_ext_set_data(struct netxbig_gpio_ext *gpio_ext, int data)
{
int pin;
for (pin = 0; pin < gpio_ext->num_data; pin++)
gpiod_set_value(gpio_ext->data[pin], (data >> pin) & 1);
}
static void gpio_ext_enable_select(struct netxbig_gpio_ext *gpio_ext)
{
/* Enable select is done on the raising edge. */
gpiod_set_value(gpio_ext->enable, 0);
gpiod_set_value(gpio_ext->enable, 1);
}
static void gpio_ext_set_value(struct netxbig_gpio_ext *gpio_ext,
int addr, int value)
{
unsigned long flags;
spin_lock_irqsave(&gpio_ext_lock, flags);
gpio_ext_set_addr(gpio_ext, addr);
gpio_ext_set_data(gpio_ext, value);
gpio_ext_enable_select(gpio_ext);
spin_unlock_irqrestore(&gpio_ext_lock, flags);
}
/*
* Class LED driver.
*/
struct netxbig_led_data {
struct netxbig_gpio_ext *gpio_ext;
struct led_classdev cdev;
int mode_addr;
int *mode_val;
int bright_addr;
struct netxbig_led_timer *timer;
int num_timer;
enum netxbig_led_mode mode;
int sata;
spinlock_t lock;
};
static int netxbig_led_get_timer_mode(enum netxbig_led_mode *mode,
unsigned long delay_on,
unsigned long delay_off,
struct netxbig_led_timer *timer,
int num_timer)
{
int i;
for (i = 0; i < num_timer; i++) {
if (timer[i].delay_on == delay_on &&
timer[i].delay_off == delay_off) {
*mode = timer[i].mode;
return 0;
}
}
return -EINVAL;
}
static int netxbig_led_blink_set(struct led_classdev *led_cdev,
unsigned long *delay_on,
unsigned long *delay_off)
{
struct netxbig_led_data *led_dat =
container_of(led_cdev, struct netxbig_led_data, cdev);
enum netxbig_led_mode mode;
int mode_val;
int ret;
/* Look for a LED mode with the requested timer frequency. */
ret = netxbig_led_get_timer_mode(&mode, *delay_on, *delay_off,
led_dat->timer, led_dat->num_timer);
if (ret < 0)
return ret;
mode_val = led_dat->mode_val[mode];
if (mode_val == NETXBIG_LED_INVALID_MODE)
return -EINVAL;
spin_lock_irq(&led_dat->lock);
gpio_ext_set_value(led_dat->gpio_ext, led_dat->mode_addr, mode_val);
led_dat->mode = mode;
spin_unlock_irq(&led_dat->lock);
return 0;
}
static void netxbig_led_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
struct netxbig_led_data *led_dat =
container_of(led_cdev, struct netxbig_led_data, cdev);
enum netxbig_led_mode mode;
int mode_val;
int set_brightness = 1;
unsigned long flags;
spin_lock_irqsave(&led_dat->lock, flags);
if (value == LED_OFF) {
mode = NETXBIG_LED_OFF;
set_brightness = 0;
} else {
if (led_dat->sata)
mode = NETXBIG_LED_SATA;
else if (led_dat->mode == NETXBIG_LED_OFF)
mode = NETXBIG_LED_ON;
else /* Keep 'timer' mode. */
mode = led_dat->mode;
}
mode_val = led_dat->mode_val[mode];
gpio_ext_set_value(led_dat->gpio_ext, led_dat->mode_addr, mode_val);
led_dat->mode = mode;
/*
* Note that the brightness register is shared between all the
* SATA LEDs. So, change the brightness setting for a single
* SATA LED will affect all the others.
*/
if (set_brightness)
gpio_ext_set_value(led_dat->gpio_ext,
led_dat->bright_addr, value);
spin_unlock_irqrestore(&led_dat->lock, flags);
}
static ssize_t sata_store(struct device *dev,
struct device_attribute *attr,
const char *buff, size_t count)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct netxbig_led_data *led_dat =
container_of(led_cdev, struct netxbig_led_data, cdev);
unsigned long enable;
enum netxbig_led_mode mode;
int mode_val;
int ret;
ret = kstrtoul(buff, 10, &enable);
if (ret < 0)
return ret;
enable = !!enable;
spin_lock_irq(&led_dat->lock);
if (led_dat->sata == enable) {
ret = count;
goto exit_unlock;
}
if (led_dat->mode != NETXBIG_LED_ON &&
led_dat->mode != NETXBIG_LED_SATA)
mode = led_dat->mode; /* Keep modes 'off' and 'timer'. */
else if (enable)
mode = NETXBIG_LED_SATA;
else
mode = NETXBIG_LED_ON;
mode_val = led_dat->mode_val[mode];
if (mode_val == NETXBIG_LED_INVALID_MODE) {
ret = -EINVAL;
goto exit_unlock;
}
gpio_ext_set_value(led_dat->gpio_ext, led_dat->mode_addr, mode_val);
led_dat->mode = mode;
led_dat->sata = enable;
ret = count;
exit_unlock:
spin_unlock_irq(&led_dat->lock);
return ret;
}
static ssize_t sata_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct netxbig_led_data *led_dat =
container_of(led_cdev, struct netxbig_led_data, cdev);
return sprintf(buf, "%d\n", led_dat->sata);
}
static DEVICE_ATTR_RW(sata);
static struct attribute *netxbig_led_attrs[] = {
&dev_attr_sata.attr,
NULL
};
ATTRIBUTE_GROUPS(netxbig_led);
static int create_netxbig_led(struct platform_device *pdev,
struct netxbig_led_platform_data *pdata,
struct netxbig_led_data *led_dat,
const struct netxbig_led *template)
{
spin_lock_init(&led_dat->lock);
led_dat->gpio_ext = pdata->gpio_ext;
led_dat->cdev.name = template->name;
led_dat->cdev.default_trigger = template->default_trigger;
led_dat->cdev.blink_set = netxbig_led_blink_set;
led_dat->cdev.brightness_set = netxbig_led_set;
/*
* Because the GPIO extension bus don't allow to read registers
* value, there is no way to probe the LED initial state.
* So, the initial sysfs LED value for the "brightness" and "sata"
* attributes are inconsistent.
*
* Note that the initial LED state can't be reconfigured.
* The reason is that the LED behaviour must stay uniform during
* the whole boot process (bootloader+linux).
*/
led_dat->sata = 0;
led_dat->cdev.brightness = LED_OFF;
led_dat->cdev.max_brightness = template->bright_max;
led_dat->cdev.flags |= LED_CORE_SUSPENDRESUME;
led_dat->mode_addr = template->mode_addr;
led_dat->mode_val = template->mode_val;
led_dat->bright_addr = template->bright_addr;
led_dat->timer = pdata->timer;
led_dat->num_timer = pdata->num_timer;
/*
* If available, expose the SATA activity blink capability through
* a "sata" sysfs attribute.
*/
if (led_dat->mode_val[NETXBIG_LED_SATA] != NETXBIG_LED_INVALID_MODE)
led_dat->cdev.groups = netxbig_led_groups;
return devm_led_classdev_register(&pdev->dev, &led_dat->cdev);
}
/**
* netxbig_gpio_ext_remove() - Clean up GPIO extension data
* @data: managed resource data to clean up
*
* Since we pick GPIO descriptors from another device than the device our
* driver is probing to, we need to register a specific callback to free
* these up using managed resources.
*/
static void netxbig_gpio_ext_remove(void *data)
{
struct netxbig_gpio_ext *gpio_ext = data;
int i;
for (i = 0; i < gpio_ext->num_addr; i++)
gpiod_put(gpio_ext->addr[i]);
for (i = 0; i < gpio_ext->num_data; i++)
gpiod_put(gpio_ext->data[i]);
gpiod_put(gpio_ext->enable);
}
/**
* netxbig_gpio_ext_get() - Obtain GPIO extension device data
* @dev: main LED device
* @gpio_ext_dev: the GPIO extension device
* @gpio_ext: the data structure holding the GPIO extension data
*
* This function walks the subdevice that only contain GPIO line
* handles in the device tree and obtains the GPIO descriptors from that
* device.
*/
static int netxbig_gpio_ext_get(struct device *dev,
struct device *gpio_ext_dev,
struct netxbig_gpio_ext *gpio_ext)
{
struct gpio_desc **addr, **data;
int num_addr, num_data;
struct gpio_desc *gpiod;
int ret;
int i;
ret = gpiod_count(gpio_ext_dev, "addr");
if (ret < 0) {
dev_err(dev,
"Failed to count GPIOs in DT property addr-gpios\n");
return ret;
}
num_addr = ret;
addr = devm_kcalloc(dev, num_addr, sizeof(*addr), GFP_KERNEL);
if (!addr)
return -ENOMEM;
/*
* We cannot use devm_ managed resources with these GPIO descriptors
* since they are associated with the "GPIO extension device" which
* does not probe any driver. The device tree parser will however
* populate a platform device for it so we can anyway obtain the
* GPIO descriptors from the device.
*/
for (i = 0; i < num_addr; i++) {
gpiod = gpiod_get_index(gpio_ext_dev, "addr", i,
GPIOD_OUT_LOW);
if (IS_ERR(gpiod))
return PTR_ERR(gpiod);
gpiod_set_consumer_name(gpiod, "GPIO extension addr");
addr[i] = gpiod;
}
gpio_ext->addr = addr;
gpio_ext->num_addr = num_addr;
ret = gpiod_count(gpio_ext_dev, "data");
if (ret < 0) {
dev_err(dev,
"Failed to count GPIOs in DT property data-gpios\n");
return ret;
}
num_data = ret;
data = devm_kcalloc(dev, num_data, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
for (i = 0; i < num_data; i++) {
gpiod = gpiod_get_index(gpio_ext_dev, "data", i,
GPIOD_OUT_LOW);
if (IS_ERR(gpiod))
return PTR_ERR(gpiod);
gpiod_set_consumer_name(gpiod, "GPIO extension data");
data[i] = gpiod;
}
gpio_ext->data = data;
gpio_ext->num_data = num_data;
gpiod = gpiod_get(gpio_ext_dev, "enable", GPIOD_OUT_LOW);
if (IS_ERR(gpiod)) {
dev_err(dev,
"Failed to get GPIO from DT property enable-gpio\n");
return PTR_ERR(gpiod);
}
gpiod_set_consumer_name(gpiod, "GPIO extension enable");
gpio_ext->enable = gpiod;
return devm_add_action_or_reset(dev, netxbig_gpio_ext_remove, gpio_ext);
}
static int netxbig_leds_get_of_pdata(struct device *dev,
struct netxbig_led_platform_data *pdata)
{
struct device_node *np = dev_of_node(dev);
struct device_node *gpio_ext_np;
struct platform_device *gpio_ext_pdev;
struct device *gpio_ext_dev;
struct device_node *child;
struct netxbig_gpio_ext *gpio_ext;
struct netxbig_led_timer *timers;
struct netxbig_led *leds, *led;
int num_timers;
int num_leds = 0;
int ret;
int i;
/* GPIO extension */
gpio_ext_np = of_parse_phandle(np, "gpio-ext", 0);
if (!gpio_ext_np) {
dev_err(dev, "Failed to get DT handle gpio-ext\n");
return -EINVAL;
}
gpio_ext_pdev = of_find_device_by_node(gpio_ext_np);
if (!gpio_ext_pdev) {
dev_err(dev, "Failed to find platform device for gpio-ext\n");
return -ENODEV;
}
gpio_ext_dev = &gpio_ext_pdev->dev;
gpio_ext = devm_kzalloc(dev, sizeof(*gpio_ext), GFP_KERNEL);
if (!gpio_ext) {
of_node_put(gpio_ext_np);
ret = -ENOMEM;
goto put_device;
}
ret = netxbig_gpio_ext_get(dev, gpio_ext_dev, gpio_ext);
of_node_put(gpio_ext_np);
if (ret)
goto put_device;
pdata->gpio_ext = gpio_ext;
/* Timers (optional) */
ret = of_property_count_u32_elems(np, "timers");
if (ret > 0) {
if (ret % 3) {
ret = -EINVAL;
goto put_device;
}
num_timers = ret / 3;
timers = devm_kcalloc(dev, num_timers, sizeof(*timers),
GFP_KERNEL);
if (!timers) {
ret = -ENOMEM;
goto put_device;
}
for (i = 0; i < num_timers; i++) {
u32 tmp;
of_property_read_u32_index(np, "timers", 3 * i,
&timers[i].mode);
if (timers[i].mode >= NETXBIG_LED_MODE_NUM) {
ret = -EINVAL;
goto put_device;
}
of_property_read_u32_index(np, "timers",
3 * i + 1, &tmp);
timers[i].delay_on = tmp;
of_property_read_u32_index(np, "timers",
3 * i + 2, &tmp);
timers[i].delay_off = tmp;
}
pdata->timer = timers;
pdata->num_timer = num_timers;
}
/* LEDs */
num_leds = of_get_available_child_count(np);
if (!num_leds) {
dev_err(dev, "No LED subnodes found in DT\n");
ret = -ENODEV;
goto put_device;
}
leds = devm_kcalloc(dev, num_leds, sizeof(*leds), GFP_KERNEL);
if (!leds) {
ret = -ENOMEM;
goto put_device;
}
led = leds;
for_each_available_child_of_node(np, child) {
const char *string;
int *mode_val;
int num_modes;
ret = of_property_read_u32(child, "mode-addr",
&led->mode_addr);
if (ret)
goto err_node_put;
ret = of_property_read_u32(child, "bright-addr",
&led->bright_addr);
if (ret)
goto err_node_put;
ret = of_property_read_u32(child, "max-brightness",
&led->bright_max);
if (ret)
goto err_node_put;
mode_val =
devm_kcalloc(dev,
NETXBIG_LED_MODE_NUM, sizeof(*mode_val),
GFP_KERNEL);
if (!mode_val) {
ret = -ENOMEM;
goto err_node_put;
}
for (i = 0; i < NETXBIG_LED_MODE_NUM; i++)
mode_val[i] = NETXBIG_LED_INVALID_MODE;
ret = of_property_count_u32_elems(child, "mode-val");
if (ret < 0 || ret % 2) {
ret = -EINVAL;
goto err_node_put;
}
num_modes = ret / 2;
if (num_modes > NETXBIG_LED_MODE_NUM) {
ret = -EINVAL;
goto err_node_put;
}
for (i = 0; i < num_modes; i++) {
int mode;
int val;
of_property_read_u32_index(child,
"mode-val", 2 * i, &mode);
of_property_read_u32_index(child,
"mode-val", 2 * i + 1, &val);
if (mode >= NETXBIG_LED_MODE_NUM) {
ret = -EINVAL;
goto err_node_put;
}
mode_val[mode] = val;
}
led->mode_val = mode_val;
if (!of_property_read_string(child, "label", &string))
led->name = string;
else
led->name = child->name;
if (!of_property_read_string(child,
"linux,default-trigger", &string))
led->default_trigger = string;
led++;
}
pdata->leds = leds;
pdata->num_leds = num_leds;
return 0;
err_node_put:
of_node_put(child);
put_device:
put_device(gpio_ext_dev);
return ret;
}
static const struct of_device_id of_netxbig_leds_match[] = {
{ .compatible = "lacie,netxbig-leds", },
{},
};
MODULE_DEVICE_TABLE(of, of_netxbig_leds_match);
static int netxbig_led_probe(struct platform_device *pdev)
{
struct netxbig_led_platform_data *pdata;
struct netxbig_led_data *leds_data;
int i;
int ret;
pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return -ENOMEM;
ret = netxbig_leds_get_of_pdata(&pdev->dev, pdata);
if (ret)
return ret;
leds_data = devm_kcalloc(&pdev->dev,
pdata->num_leds, sizeof(*leds_data),
GFP_KERNEL);
if (!leds_data)
return -ENOMEM;
for (i = 0; i < pdata->num_leds; i++) {
ret = create_netxbig_led(pdev, pdata,
&leds_data[i], &pdata->leds[i]);
if (ret < 0)
return ret;
}
return 0;
}
static struct platform_driver netxbig_led_driver = {
.probe = netxbig_led_probe,
.driver = {
.name = "leds-netxbig",
.of_match_table = of_netxbig_leds_match,
},
};
module_platform_driver(netxbig_led_driver);
MODULE_AUTHOR("Simon Guinot <[email protected]>");
MODULE_DESCRIPTION("LED driver for LaCie xBig Network boards");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:leds-netxbig");
| linux-master | drivers/leds/leds-netxbig.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2014 Belkin Inc.
* Copyright 2015 Andrew Lunn <[email protected]>
*/
#include <linux/i2c.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#define TLC591XX_MAX_LEDS 16
#define TLC591XX_MAX_BRIGHTNESS 256
#define TLC591XX_REG_MODE1 0x00
#define MODE1_RESPON_ADDR_MASK 0xF0
#define MODE1_NORMAL_MODE (0 << 4)
#define MODE1_SPEED_MODE (1 << 4)
#define TLC591XX_REG_MODE2 0x01
#define MODE2_DIM (0 << 5)
#define MODE2_BLINK (1 << 5)
#define MODE2_OCH_STOP (0 << 3)
#define MODE2_OCH_ACK (1 << 3)
#define TLC591XX_REG_PWM(x) (0x02 + (x))
#define TLC591XX_REG_GRPPWM 0x12
#define TLC591XX_REG_GRPFREQ 0x13
/* LED Driver Output State, determine the source that drives LED outputs */
#define LEDOUT_OFF 0x0 /* Output LOW */
#define LEDOUT_ON 0x1 /* Output HI-Z */
#define LEDOUT_DIM 0x2 /* Dimming */
#define LEDOUT_BLINK 0x3 /* Blinking */
#define LEDOUT_MASK 0x3
#define ldev_to_led(c) container_of(c, struct tlc591xx_led, ldev)
struct tlc591xx_led {
bool active;
unsigned int led_no;
struct led_classdev ldev;
struct tlc591xx_priv *priv;
};
struct tlc591xx_priv {
struct tlc591xx_led leds[TLC591XX_MAX_LEDS];
struct regmap *regmap;
unsigned int reg_ledout_offset;
};
struct tlc591xx {
unsigned int max_leds;
unsigned int reg_ledout_offset;
};
static const struct tlc591xx tlc59116 = {
.max_leds = 16,
.reg_ledout_offset = 0x14,
};
static const struct tlc591xx tlc59108 = {
.max_leds = 8,
.reg_ledout_offset = 0x0c,
};
static int
tlc591xx_set_mode(struct regmap *regmap, u8 mode)
{
int err;
u8 val;
err = regmap_write(regmap, TLC591XX_REG_MODE1, MODE1_NORMAL_MODE);
if (err)
return err;
val = MODE2_OCH_STOP | mode;
return regmap_write(regmap, TLC591XX_REG_MODE2, val);
}
static int
tlc591xx_set_ledout(struct tlc591xx_priv *priv, struct tlc591xx_led *led,
u8 val)
{
unsigned int i = (led->led_no % 4) * 2;
unsigned int mask = LEDOUT_MASK << i;
unsigned int addr = priv->reg_ledout_offset + (led->led_no >> 2);
val = val << i;
return regmap_update_bits(priv->regmap, addr, mask, val);
}
static int
tlc591xx_set_pwm(struct tlc591xx_priv *priv, struct tlc591xx_led *led,
u8 brightness)
{
u8 pwm = TLC591XX_REG_PWM(led->led_no);
return regmap_write(priv->regmap, pwm, brightness);
}
static int
tlc591xx_brightness_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
struct tlc591xx_led *led = ldev_to_led(led_cdev);
struct tlc591xx_priv *priv = led->priv;
int err;
switch ((int)brightness) {
case 0:
err = tlc591xx_set_ledout(priv, led, LEDOUT_OFF);
break;
case TLC591XX_MAX_BRIGHTNESS:
err = tlc591xx_set_ledout(priv, led, LEDOUT_ON);
break;
default:
err = tlc591xx_set_ledout(priv, led, LEDOUT_DIM);
if (!err)
err = tlc591xx_set_pwm(priv, led, brightness);
}
return err;
}
static const struct regmap_config tlc591xx_regmap = {
.reg_bits = 8,
.val_bits = 8,
.max_register = 0x1e,
};
static const struct of_device_id of_tlc591xx_leds_match[] __maybe_unused = {
{ .compatible = "ti,tlc59116",
.data = &tlc59116 },
{ .compatible = "ti,tlc59108",
.data = &tlc59108 },
{},
};
MODULE_DEVICE_TABLE(of, of_tlc591xx_leds_match);
static int
tlc591xx_probe(struct i2c_client *client)
{
struct device_node *np, *child;
struct device *dev = &client->dev;
const struct tlc591xx *tlc591xx;
struct tlc591xx_priv *priv;
int err, count, reg;
np = dev_of_node(dev);
if (!np)
return -ENODEV;
tlc591xx = device_get_match_data(dev);
if (!tlc591xx)
return -ENODEV;
count = of_get_available_child_count(np);
if (!count || count > tlc591xx->max_leds)
return -EINVAL;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->regmap = devm_regmap_init_i2c(client, &tlc591xx_regmap);
if (IS_ERR(priv->regmap)) {
err = PTR_ERR(priv->regmap);
dev_err(dev, "Failed to allocate register map: %d\n", err);
return err;
}
priv->reg_ledout_offset = tlc591xx->reg_ledout_offset;
i2c_set_clientdata(client, priv);
err = tlc591xx_set_mode(priv->regmap, MODE2_DIM);
if (err < 0)
return err;
for_each_available_child_of_node(np, child) {
struct tlc591xx_led *led;
struct led_init_data init_data = {};
init_data.fwnode = of_fwnode_handle(child);
err = of_property_read_u32(child, "reg", ®);
if (err) {
of_node_put(child);
return err;
}
if (reg < 0 || reg >= tlc591xx->max_leds ||
priv->leds[reg].active) {
of_node_put(child);
return -EINVAL;
}
led = &priv->leds[reg];
led->active = true;
led->priv = priv;
led->led_no = reg;
led->ldev.brightness_set_blocking = tlc591xx_brightness_set;
led->ldev.max_brightness = TLC591XX_MAX_BRIGHTNESS;
err = devm_led_classdev_register_ext(dev, &led->ldev,
&init_data);
if (err < 0) {
of_node_put(child);
return dev_err_probe(dev, err,
"couldn't register LED %s\n",
led->ldev.name);
}
}
return 0;
}
static const struct i2c_device_id tlc591xx_id[] = {
{ "tlc59116" },
{ "tlc59108" },
{},
};
MODULE_DEVICE_TABLE(i2c, tlc591xx_id);
static struct i2c_driver tlc591xx_driver = {
.driver = {
.name = "tlc591xx",
.of_match_table = of_match_ptr(of_tlc591xx_leds_match),
},
.probe = tlc591xx_probe,
.id_table = tlc591xx_id,
};
module_i2c_driver(tlc591xx_driver);
MODULE_AUTHOR("Andrew Lunn <[email protected]>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("TLC591XX LED driver");
| linux-master | drivers/leds/leds-tlc591xx.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Driver for ISSI IS31FL32xx family of I2C LED controllers
*
* Copyright 2015 Allworx Corp.
*
* Datasheets:
* http://www.issi.com/US/product-analog-fxled-driver.shtml
* http://www.si-en.com/product.asp?parentid=890
*/
#include <linux/device.h>
#include <linux/i2c.h>
#include <linux/kernel.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/of.h>
/* Used to indicate a device has no such register */
#define IS31FL32XX_REG_NONE 0xFF
/* Software Shutdown bit in Shutdown Register */
#define IS31FL32XX_SHUTDOWN_SSD_ENABLE 0
#define IS31FL32XX_SHUTDOWN_SSD_DISABLE BIT(0)
/* IS31FL3216 has a number of unique registers */
#define IS31FL3216_CONFIG_REG 0x00
#define IS31FL3216_LIGHTING_EFFECT_REG 0x03
#define IS31FL3216_CHANNEL_CONFIG_REG 0x04
/* Software Shutdown bit in 3216 Config Register */
#define IS31FL3216_CONFIG_SSD_ENABLE BIT(7)
#define IS31FL3216_CONFIG_SSD_DISABLE 0
struct is31fl32xx_priv;
struct is31fl32xx_led_data {
struct led_classdev cdev;
u8 channel; /* 1-based, max priv->cdef->channels */
struct is31fl32xx_priv *priv;
};
struct is31fl32xx_priv {
const struct is31fl32xx_chipdef *cdef;
struct i2c_client *client;
unsigned int num_leds;
struct is31fl32xx_led_data leds[];
};
/**
* struct is31fl32xx_chipdef - chip-specific attributes
* @channels : Number of LED channels
* @shutdown_reg : address of Shutdown register (optional)
* @pwm_update_reg : address of PWM Update register
* @global_control_reg : address of Global Control register (optional)
* @reset_reg : address of Reset register (optional)
* @pwm_register_base : address of first PWM register
* @pwm_registers_reversed: : true if PWM registers count down instead of up
* @led_control_register_base : address of first LED control register (optional)
* @enable_bits_per_led_control_register: number of LEDs enable bits in each
* @reset_func : pointer to reset function
* @sw_shutdown_func : pointer to software shutdown function
*
* For all optional register addresses, the sentinel value %IS31FL32XX_REG_NONE
* indicates that this chip has no such register.
*
* If non-NULL, @reset_func will be called during probing to set all
* necessary registers to a known initialization state. This is needed
* for chips that do not have a @reset_reg.
*
* @enable_bits_per_led_control_register must be >=1 if
* @led_control_register_base != %IS31FL32XX_REG_NONE.
*/
struct is31fl32xx_chipdef {
u8 channels;
u8 shutdown_reg;
u8 pwm_update_reg;
u8 global_control_reg;
u8 reset_reg;
u8 pwm_register_base;
bool pwm_registers_reversed;
u8 led_control_register_base;
u8 enable_bits_per_led_control_register;
int (*reset_func)(struct is31fl32xx_priv *priv);
int (*sw_shutdown_func)(struct is31fl32xx_priv *priv, bool enable);
};
static const struct is31fl32xx_chipdef is31fl3236_cdef = {
.channels = 36,
.shutdown_reg = 0x00,
.pwm_update_reg = 0x25,
.global_control_reg = 0x4a,
.reset_reg = 0x4f,
.pwm_register_base = 0x01,
.led_control_register_base = 0x26,
.enable_bits_per_led_control_register = 1,
};
static const struct is31fl32xx_chipdef is31fl3235_cdef = {
.channels = 28,
.shutdown_reg = 0x00,
.pwm_update_reg = 0x25,
.global_control_reg = 0x4a,
.reset_reg = 0x4f,
.pwm_register_base = 0x05,
.led_control_register_base = 0x2a,
.enable_bits_per_led_control_register = 1,
};
static const struct is31fl32xx_chipdef is31fl3218_cdef = {
.channels = 18,
.shutdown_reg = 0x00,
.pwm_update_reg = 0x16,
.global_control_reg = IS31FL32XX_REG_NONE,
.reset_reg = 0x17,
.pwm_register_base = 0x01,
.led_control_register_base = 0x13,
.enable_bits_per_led_control_register = 6,
};
static int is31fl3216_reset(struct is31fl32xx_priv *priv);
static int is31fl3216_software_shutdown(struct is31fl32xx_priv *priv,
bool enable);
static const struct is31fl32xx_chipdef is31fl3216_cdef = {
.channels = 16,
.shutdown_reg = IS31FL32XX_REG_NONE,
.pwm_update_reg = 0xB0,
.global_control_reg = IS31FL32XX_REG_NONE,
.reset_reg = IS31FL32XX_REG_NONE,
.pwm_register_base = 0x10,
.pwm_registers_reversed = true,
.led_control_register_base = 0x01,
.enable_bits_per_led_control_register = 8,
.reset_func = is31fl3216_reset,
.sw_shutdown_func = is31fl3216_software_shutdown,
};
static int is31fl32xx_write(struct is31fl32xx_priv *priv, u8 reg, u8 val)
{
int ret;
dev_dbg(&priv->client->dev, "writing register 0x%02X=0x%02X", reg, val);
ret = i2c_smbus_write_byte_data(priv->client, reg, val);
if (ret) {
dev_err(&priv->client->dev,
"register write to 0x%02X failed (error %d)",
reg, ret);
}
return ret;
}
/*
* Custom reset function for IS31FL3216 because it does not have a RESET
* register the way that the other IS31FL32xx chips do. We don't bother
* writing the GPIO and animation registers, because the registers we
* do write ensure those will have no effect.
*/
static int is31fl3216_reset(struct is31fl32xx_priv *priv)
{
unsigned int i;
int ret;
ret = is31fl32xx_write(priv, IS31FL3216_CONFIG_REG,
IS31FL3216_CONFIG_SSD_ENABLE);
if (ret)
return ret;
for (i = 0; i < priv->cdef->channels; i++) {
ret = is31fl32xx_write(priv, priv->cdef->pwm_register_base+i,
0x00);
if (ret)
return ret;
}
ret = is31fl32xx_write(priv, priv->cdef->pwm_update_reg, 0);
if (ret)
return ret;
ret = is31fl32xx_write(priv, IS31FL3216_LIGHTING_EFFECT_REG, 0x00);
if (ret)
return ret;
ret = is31fl32xx_write(priv, IS31FL3216_CHANNEL_CONFIG_REG, 0x00);
if (ret)
return ret;
return 0;
}
/*
* Custom Software-Shutdown function for IS31FL3216 because it does not have
* a SHUTDOWN register the way that the other IS31FL32xx chips do.
* We don't bother doing a read/modify/write on the CONFIG register because
* we only ever use a value of '0' for the other fields in that register.
*/
static int is31fl3216_software_shutdown(struct is31fl32xx_priv *priv,
bool enable)
{
u8 value = enable ? IS31FL3216_CONFIG_SSD_ENABLE :
IS31FL3216_CONFIG_SSD_DISABLE;
return is31fl32xx_write(priv, IS31FL3216_CONFIG_REG, value);
}
/*
* NOTE: A mutex is not needed in this function because:
* - All referenced data is read-only after probe()
* - The I2C core has a mutex on to protect the bus
* - There are no read/modify/write operations
* - Intervening operations between the write of the PWM register
* and the Update register are harmless.
*
* Example:
* PWM_REG_1 write 16
* UPDATE_REG write 0
* PWM_REG_2 write 128
* UPDATE_REG write 0
* vs:
* PWM_REG_1 write 16
* PWM_REG_2 write 128
* UPDATE_REG write 0
* UPDATE_REG write 0
* are equivalent. Poking the Update register merely applies all PWM
* register writes up to that point.
*/
static int is31fl32xx_brightness_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
const struct is31fl32xx_led_data *led_data =
container_of(led_cdev, struct is31fl32xx_led_data, cdev);
const struct is31fl32xx_chipdef *cdef = led_data->priv->cdef;
u8 pwm_register_offset;
int ret;
dev_dbg(led_cdev->dev, "%s: %d\n", __func__, brightness);
/* NOTE: led_data->channel is 1-based */
if (cdef->pwm_registers_reversed)
pwm_register_offset = cdef->channels - led_data->channel;
else
pwm_register_offset = led_data->channel - 1;
ret = is31fl32xx_write(led_data->priv,
cdef->pwm_register_base + pwm_register_offset,
brightness);
if (ret)
return ret;
return is31fl32xx_write(led_data->priv, cdef->pwm_update_reg, 0);
}
static int is31fl32xx_reset_regs(struct is31fl32xx_priv *priv)
{
const struct is31fl32xx_chipdef *cdef = priv->cdef;
int ret;
if (cdef->reset_reg != IS31FL32XX_REG_NONE) {
ret = is31fl32xx_write(priv, cdef->reset_reg, 0);
if (ret)
return ret;
}
if (cdef->reset_func)
return cdef->reset_func(priv);
return 0;
}
static int is31fl32xx_software_shutdown(struct is31fl32xx_priv *priv,
bool enable)
{
const struct is31fl32xx_chipdef *cdef = priv->cdef;
int ret;
if (cdef->shutdown_reg != IS31FL32XX_REG_NONE) {
u8 value = enable ? IS31FL32XX_SHUTDOWN_SSD_ENABLE :
IS31FL32XX_SHUTDOWN_SSD_DISABLE;
ret = is31fl32xx_write(priv, cdef->shutdown_reg, value);
if (ret)
return ret;
}
if (cdef->sw_shutdown_func)
return cdef->sw_shutdown_func(priv, enable);
return 0;
}
static int is31fl32xx_init_regs(struct is31fl32xx_priv *priv)
{
const struct is31fl32xx_chipdef *cdef = priv->cdef;
int ret;
ret = is31fl32xx_reset_regs(priv);
if (ret)
return ret;
/*
* Set enable bit for all channels.
* We will control state with PWM registers alone.
*/
if (cdef->led_control_register_base != IS31FL32XX_REG_NONE) {
u8 value =
GENMASK(cdef->enable_bits_per_led_control_register-1, 0);
u8 num_regs = cdef->channels /
cdef->enable_bits_per_led_control_register;
int i;
for (i = 0; i < num_regs; i++) {
ret = is31fl32xx_write(priv,
cdef->led_control_register_base+i,
value);
if (ret)
return ret;
}
}
ret = is31fl32xx_software_shutdown(priv, false);
if (ret)
return ret;
if (cdef->global_control_reg != IS31FL32XX_REG_NONE) {
ret = is31fl32xx_write(priv, cdef->global_control_reg, 0x00);
if (ret)
return ret;
}
return 0;
}
static int is31fl32xx_parse_child_dt(const struct device *dev,
const struct device_node *child,
struct is31fl32xx_led_data *led_data)
{
struct led_classdev *cdev = &led_data->cdev;
int ret = 0;
u32 reg;
ret = of_property_read_u32(child, "reg", ®);
if (ret || reg < 1 || reg > led_data->priv->cdef->channels) {
dev_err(dev,
"Child node %pOF does not have a valid reg property\n",
child);
return -EINVAL;
}
led_data->channel = reg;
cdev->brightness_set_blocking = is31fl32xx_brightness_set;
return 0;
}
static struct is31fl32xx_led_data *is31fl32xx_find_led_data(
struct is31fl32xx_priv *priv,
u8 channel)
{
size_t i;
for (i = 0; i < priv->num_leds; i++) {
if (priv->leds[i].channel == channel)
return &priv->leds[i];
}
return NULL;
}
static int is31fl32xx_parse_dt(struct device *dev,
struct is31fl32xx_priv *priv)
{
struct device_node *child;
int ret = 0;
for_each_available_child_of_node(dev_of_node(dev), child) {
struct led_init_data init_data = {};
struct is31fl32xx_led_data *led_data =
&priv->leds[priv->num_leds];
const struct is31fl32xx_led_data *other_led_data;
led_data->priv = priv;
ret = is31fl32xx_parse_child_dt(dev, child, led_data);
if (ret)
goto err;
/* Detect if channel is already in use by another child */
other_led_data = is31fl32xx_find_led_data(priv,
led_data->channel);
if (other_led_data) {
dev_err(dev,
"Node %pOF 'reg' conflicts with another LED\n",
child);
ret = -EINVAL;
goto err;
}
init_data.fwnode = of_fwnode_handle(child);
ret = devm_led_classdev_register_ext(dev, &led_data->cdev,
&init_data);
if (ret) {
dev_err(dev, "Failed to register LED for %pOF: %d\n",
child, ret);
goto err;
}
priv->num_leds++;
}
return 0;
err:
of_node_put(child);
return ret;
}
static const struct of_device_id of_is31fl32xx_match[] = {
{ .compatible = "issi,is31fl3236", .data = &is31fl3236_cdef, },
{ .compatible = "issi,is31fl3235", .data = &is31fl3235_cdef, },
{ .compatible = "issi,is31fl3218", .data = &is31fl3218_cdef, },
{ .compatible = "si-en,sn3218", .data = &is31fl3218_cdef, },
{ .compatible = "issi,is31fl3216", .data = &is31fl3216_cdef, },
{ .compatible = "si-en,sn3216", .data = &is31fl3216_cdef, },
{},
};
MODULE_DEVICE_TABLE(of, of_is31fl32xx_match);
static int is31fl32xx_probe(struct i2c_client *client)
{
const struct is31fl32xx_chipdef *cdef;
struct device *dev = &client->dev;
struct is31fl32xx_priv *priv;
int count;
int ret = 0;
cdef = device_get_match_data(dev);
count = of_get_available_child_count(dev_of_node(dev));
if (!count)
return -EINVAL;
priv = devm_kzalloc(dev, struct_size(priv, leds, count),
GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->client = client;
priv->cdef = cdef;
i2c_set_clientdata(client, priv);
ret = is31fl32xx_init_regs(priv);
if (ret)
return ret;
ret = is31fl32xx_parse_dt(dev, priv);
if (ret)
return ret;
return 0;
}
static void is31fl32xx_remove(struct i2c_client *client)
{
struct is31fl32xx_priv *priv = i2c_get_clientdata(client);
int ret;
ret = is31fl32xx_reset_regs(priv);
if (ret)
dev_err(&client->dev, "Failed to reset registers on removal (%pe)\n",
ERR_PTR(ret));
}
/*
* i2c-core (and modalias) requires that id_table be properly filled,
* even though it is not used for DeviceTree based instantiation.
*/
static const struct i2c_device_id is31fl32xx_id[] = {
{ "is31fl3236" },
{ "is31fl3235" },
{ "is31fl3218" },
{ "sn3218" },
{ "is31fl3216" },
{ "sn3216" },
{},
};
MODULE_DEVICE_TABLE(i2c, is31fl32xx_id);
static struct i2c_driver is31fl32xx_driver = {
.driver = {
.name = "is31fl32xx",
.of_match_table = of_is31fl32xx_match,
},
.probe = is31fl32xx_probe,
.remove = is31fl32xx_remove,
.id_table = is31fl32xx_id,
};
module_i2c_driver(is31fl32xx_driver);
MODULE_AUTHOR("David Rivshin <[email protected]>");
MODULE_DESCRIPTION("ISSI IS31FL32xx LED driver");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/leds-is31fl32xx.c |
// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2018 Crane Merchandising Systems. All rights reserved.
// Copyright (C) 2018 Oleh Kravchenko <[email protected]>
#include <linux/delay.h>
#include <linux/leds.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/spi/spi.h>
#include <linux/workqueue.h>
/*
* CR0014114 SPI protocol descrtiption:
* +----+-----------------------------------+----+
* | CMD| BRIGHTNESS |CRC |
* +----+-----------------------------------+----+
* | | LED0| LED1| LED2| LED3| LED4| LED5| |
* | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
* | |R|G|B|R|G|B|R|G|B|R|G|B|R|G|B|R|G|B| |
* | 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 1 |
* | |1|1|1|1|1|1|1|1|1|1|1|1|1|1|1|1|1|1| |
* | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
* | | 18 | |
* +----+-----------------------------------+----+
* | 20 |
* +---------------------------------------------+
*
* PS: Boards can be connected to the chain:
* SPI -> board0 -> board1 -> board2 ..
*/
/* CR0014114 SPI commands */
#define CR_SET_BRIGHTNESS 0x80
#define CR_INIT_REENUMERATE 0x81
#define CR_NEXT_REENUMERATE 0x82
/* CR0014114 default settings */
#define CR_MAX_BRIGHTNESS GENMASK(6, 0)
#define CR_FW_DELAY_MSEC 10
#define CR_RECOUNT_DELAY (HZ * 3600)
#define CR_DEV_NAME "cr0014114"
struct cr0014114_led {
struct cr0014114 *priv;
struct led_classdev ldev;
u8 brightness;
};
struct cr0014114 {
bool do_recount;
size_t count;
struct delayed_work work;
struct device *dev;
struct mutex lock;
struct spi_device *spi;
u8 *buf;
unsigned long delay;
struct cr0014114_led leds[];
};
static void cr0014114_calc_crc(u8 *buf, const size_t len)
{
size_t i;
u8 crc;
for (i = 1, crc = 1; i < len - 1; i++)
crc += buf[i];
crc |= BIT(7);
/* special case when CRC matches the SPI commands */
if (crc == CR_SET_BRIGHTNESS ||
crc == CR_INIT_REENUMERATE ||
crc == CR_NEXT_REENUMERATE)
crc = 0xfe;
buf[len - 1] = crc;
}
static int cr0014114_recount(struct cr0014114 *priv)
{
int ret;
size_t i;
u8 cmd;
dev_dbg(priv->dev, "LEDs recount is started\n");
cmd = CR_INIT_REENUMERATE;
ret = spi_write(priv->spi, &cmd, sizeof(cmd));
if (ret)
goto err;
cmd = CR_NEXT_REENUMERATE;
for (i = 0; i < priv->count; i++) {
msleep(CR_FW_DELAY_MSEC);
ret = spi_write(priv->spi, &cmd, sizeof(cmd));
if (ret)
goto err;
}
err:
dev_dbg(priv->dev, "LEDs recount is finished\n");
if (ret)
dev_err(priv->dev, "with error %d", ret);
return ret;
}
static int cr0014114_sync(struct cr0014114 *priv)
{
int ret;
size_t i;
unsigned long udelay, now = jiffies;
/* to avoid SPI mistiming with firmware we should wait some time */
if (time_after(priv->delay, now)) {
udelay = jiffies_to_usecs(priv->delay - now);
usleep_range(udelay, udelay + 1);
}
if (unlikely(priv->do_recount)) {
ret = cr0014114_recount(priv);
if (ret)
goto err;
priv->do_recount = false;
msleep(CR_FW_DELAY_MSEC);
}
priv->buf[0] = CR_SET_BRIGHTNESS;
for (i = 0; i < priv->count; i++)
priv->buf[i + 1] = priv->leds[i].brightness;
cr0014114_calc_crc(priv->buf, priv->count + 2);
ret = spi_write(priv->spi, priv->buf, priv->count + 2);
err:
priv->delay = jiffies + msecs_to_jiffies(CR_FW_DELAY_MSEC);
return ret;
}
static void cr0014114_recount_work(struct work_struct *work)
{
int ret;
struct cr0014114 *priv = container_of(work,
struct cr0014114,
work.work);
mutex_lock(&priv->lock);
priv->do_recount = true;
ret = cr0014114_sync(priv);
mutex_unlock(&priv->lock);
if (ret)
dev_warn(priv->dev, "sync of LEDs failed %d\n", ret);
schedule_delayed_work(&priv->work, CR_RECOUNT_DELAY);
}
static int cr0014114_set_sync(struct led_classdev *ldev,
enum led_brightness brightness)
{
int ret;
struct cr0014114_led *led = container_of(ldev,
struct cr0014114_led,
ldev);
dev_dbg(led->priv->dev, "Set brightness to %d\n", brightness);
mutex_lock(&led->priv->lock);
led->brightness = (u8)brightness;
ret = cr0014114_sync(led->priv);
mutex_unlock(&led->priv->lock);
return ret;
}
static int cr0014114_probe_dt(struct cr0014114 *priv)
{
size_t i = 0;
struct cr0014114_led *led;
struct fwnode_handle *child;
struct led_init_data init_data = {};
int ret;
device_for_each_child_node(priv->dev, child) {
led = &priv->leds[i];
led->priv = priv;
led->ldev.max_brightness = CR_MAX_BRIGHTNESS;
led->ldev.brightness_set_blocking = cr0014114_set_sync;
init_data.fwnode = child;
init_data.devicename = CR_DEV_NAME;
init_data.default_label = ":";
ret = devm_led_classdev_register_ext(priv->dev, &led->ldev,
&init_data);
if (ret) {
dev_err(priv->dev,
"failed to register LED device, err %d", ret);
fwnode_handle_put(child);
return ret;
}
i++;
}
return 0;
}
static int cr0014114_probe(struct spi_device *spi)
{
struct cr0014114 *priv;
size_t count;
int ret;
count = device_get_child_node_count(&spi->dev);
if (!count) {
dev_err(&spi->dev, "LEDs are not defined in device tree!");
return -ENODEV;
}
priv = devm_kzalloc(&spi->dev, struct_size(priv, leds, count),
GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->buf = devm_kzalloc(&spi->dev, count + 2, GFP_KERNEL);
if (!priv->buf)
return -ENOMEM;
mutex_init(&priv->lock);
INIT_DELAYED_WORK(&priv->work, cr0014114_recount_work);
priv->count = count;
priv->dev = &spi->dev;
priv->spi = spi;
priv->delay = jiffies -
msecs_to_jiffies(CR_FW_DELAY_MSEC);
priv->do_recount = true;
ret = cr0014114_sync(priv);
if (ret) {
dev_err(priv->dev, "first recount failed %d\n", ret);
return ret;
}
priv->do_recount = true;
ret = cr0014114_sync(priv);
if (ret) {
dev_err(priv->dev, "second recount failed %d\n", ret);
return ret;
}
ret = cr0014114_probe_dt(priv);
if (ret)
return ret;
/* setup recount work to workaround buggy firmware */
schedule_delayed_work(&priv->work, CR_RECOUNT_DELAY);
spi_set_drvdata(spi, priv);
return 0;
}
static void cr0014114_remove(struct spi_device *spi)
{
struct cr0014114 *priv = spi_get_drvdata(spi);
cancel_delayed_work_sync(&priv->work);
mutex_destroy(&priv->lock);
}
static const struct of_device_id cr0014114_dt_ids[] = {
{ .compatible = "crane,cr0014114", },
{},
};
MODULE_DEVICE_TABLE(of, cr0014114_dt_ids);
static struct spi_driver cr0014114_driver = {
.probe = cr0014114_probe,
.remove = cr0014114_remove,
.driver = {
.name = KBUILD_MODNAME,
.of_match_table = cr0014114_dt_ids,
},
};
module_spi_driver(cr0014114_driver);
MODULE_AUTHOR("Oleh Kravchenko <[email protected]>");
MODULE_DESCRIPTION("cr0014114 LED driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("spi:cr0014114");
| linux-master | drivers/leds/leds-cr0014114.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* pca9532.c - 16-bit Led dimmer
*
* Copyright (C) 2011 Jan Weitzel
* Copyright (C) 2008 Riku Voipio
*
* Datasheet: http://www.nxp.com/documents/data_sheet/PCA9532.pdf
*/
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/leds.h>
#include <linux/input.h>
#include <linux/mutex.h>
#include <linux/workqueue.h>
#include <linux/leds-pca9532.h>
#include <linux/gpio/driver.h>
#include <linux/of.h>
/* m = num_leds*/
#define PCA9532_REG_INPUT(i) ((i) >> 3)
#define PCA9532_REG_OFFSET(m) ((m) >> 4)
#define PCA9532_REG_PSC(m, i) (PCA9532_REG_OFFSET(m) + 0x1 + (i) * 2)
#define PCA9532_REG_PWM(m, i) (PCA9532_REG_OFFSET(m) + 0x2 + (i) * 2)
#define LED_REG(m, led) (PCA9532_REG_OFFSET(m) + 0x5 + (led >> 2))
#define LED_NUM(led) (led & 0x3)
#define LED_SHIFT(led) (LED_NUM(led) * 2)
#define LED_MASK(led) (0x3 << LED_SHIFT(led))
#define ldev_to_led(c) container_of(c, struct pca9532_led, ldev)
struct pca9532_chip_info {
u8 num_leds;
};
struct pca9532_data {
struct i2c_client *client;
struct pca9532_led leds[16];
struct mutex update_lock;
struct input_dev *idev;
struct work_struct work;
#ifdef CONFIG_LEDS_PCA9532_GPIO
struct gpio_chip gpio;
#endif
const struct pca9532_chip_info *chip_info;
u8 pwm[2];
u8 psc[2];
};
static int pca9532_probe(struct i2c_client *client);
static void pca9532_remove(struct i2c_client *client);
enum {
pca9530,
pca9531,
pca9532,
pca9533,
};
static const struct i2c_device_id pca9532_id[] = {
{ "pca9530", pca9530 },
{ "pca9531", pca9531 },
{ "pca9532", pca9532 },
{ "pca9533", pca9533 },
{ }
};
MODULE_DEVICE_TABLE(i2c, pca9532_id);
static const struct pca9532_chip_info pca9532_chip_info_tbl[] = {
[pca9530] = {
.num_leds = 2,
},
[pca9531] = {
.num_leds = 8,
},
[pca9532] = {
.num_leds = 16,
},
[pca9533] = {
.num_leds = 4,
},
};
#ifdef CONFIG_OF
static const struct of_device_id of_pca9532_leds_match[] = {
{ .compatible = "nxp,pca9530", .data = (void *)pca9530 },
{ .compatible = "nxp,pca9531", .data = (void *)pca9531 },
{ .compatible = "nxp,pca9532", .data = (void *)pca9532 },
{ .compatible = "nxp,pca9533", .data = (void *)pca9533 },
{},
};
MODULE_DEVICE_TABLE(of, of_pca9532_leds_match);
#endif
static struct i2c_driver pca9532_driver = {
.driver = {
.name = "leds-pca953x",
.of_match_table = of_match_ptr(of_pca9532_leds_match),
},
.probe = pca9532_probe,
.remove = pca9532_remove,
.id_table = pca9532_id,
};
/* We have two pwm/blinkers, but 16 possible leds to drive. Additionally,
* the clever Thecus people are using one pwm to drive the beeper. So,
* as a compromise we average one pwm to the values requested by all
* leds that are not ON/OFF.
* */
static int pca9532_calcpwm(struct i2c_client *client, int pwm, int blink,
enum led_brightness value)
{
int a = 0, b = 0, i = 0;
struct pca9532_data *data = i2c_get_clientdata(client);
for (i = 0; i < data->chip_info->num_leds; i++) {
if (data->leds[i].type == PCA9532_TYPE_LED &&
data->leds[i].state == PCA9532_PWM0+pwm) {
a++;
b += data->leds[i].ldev.brightness;
}
}
if (a == 0) {
dev_err(&client->dev,
"fear of division by zero %d/%d, wanted %d\n",
b, a, value);
return -EINVAL;
}
b = b/a;
if (b > 0xFF)
return -EINVAL;
data->pwm[pwm] = b;
data->psc[pwm] = blink;
return 0;
}
static int pca9532_setpwm(struct i2c_client *client, int pwm)
{
struct pca9532_data *data = i2c_get_clientdata(client);
u8 maxleds = data->chip_info->num_leds;
mutex_lock(&data->update_lock);
i2c_smbus_write_byte_data(client, PCA9532_REG_PWM(maxleds, pwm),
data->pwm[pwm]);
i2c_smbus_write_byte_data(client, PCA9532_REG_PSC(maxleds, pwm),
data->psc[pwm]);
mutex_unlock(&data->update_lock);
return 0;
}
/* Set LED routing */
static void pca9532_setled(struct pca9532_led *led)
{
struct i2c_client *client = led->client;
struct pca9532_data *data = i2c_get_clientdata(client);
u8 maxleds = data->chip_info->num_leds;
char reg;
mutex_lock(&data->update_lock);
reg = i2c_smbus_read_byte_data(client, LED_REG(maxleds, led->id));
/* zero led bits */
reg = reg & ~LED_MASK(led->id);
/* set the new value */
reg = reg | (led->state << LED_SHIFT(led->id));
i2c_smbus_write_byte_data(client, LED_REG(maxleds, led->id), reg);
mutex_unlock(&data->update_lock);
}
static int pca9532_set_brightness(struct led_classdev *led_cdev,
enum led_brightness value)
{
int err = 0;
struct pca9532_led *led = ldev_to_led(led_cdev);
if (value == LED_OFF)
led->state = PCA9532_OFF;
else if (value == LED_FULL)
led->state = PCA9532_ON;
else {
led->state = PCA9532_PWM0; /* Thecus: hardcode one pwm */
err = pca9532_calcpwm(led->client, 0, 0, value);
if (err)
return err;
}
if (led->state == PCA9532_PWM0)
pca9532_setpwm(led->client, 0);
pca9532_setled(led);
return err;
}
static int pca9532_set_blink(struct led_classdev *led_cdev,
unsigned long *delay_on, unsigned long *delay_off)
{
struct pca9532_led *led = ldev_to_led(led_cdev);
struct i2c_client *client = led->client;
int psc;
int err = 0;
if (*delay_on == 0 && *delay_off == 0) {
/* led subsystem ask us for a blink rate */
*delay_on = 1000;
*delay_off = 1000;
}
if (*delay_on != *delay_off || *delay_on > 1690 || *delay_on < 6)
return -EINVAL;
/* Thecus specific: only use PSC/PWM 0 */
psc = (*delay_on * 152-1)/1000;
err = pca9532_calcpwm(client, 0, psc, led_cdev->brightness);
if (err)
return err;
if (led->state == PCA9532_PWM0)
pca9532_setpwm(led->client, 0);
pca9532_setled(led);
return 0;
}
static int pca9532_event(struct input_dev *dev, unsigned int type,
unsigned int code, int value)
{
struct pca9532_data *data = input_get_drvdata(dev);
if (!(type == EV_SND && (code == SND_BELL || code == SND_TONE)))
return -1;
/* XXX: allow different kind of beeps with psc/pwm modifications */
if (value > 1 && value < 32767)
data->pwm[1] = 127;
else
data->pwm[1] = 0;
schedule_work(&data->work);
return 0;
}
static void pca9532_input_work(struct work_struct *work)
{
struct pca9532_data *data =
container_of(work, struct pca9532_data, work);
u8 maxleds = data->chip_info->num_leds;
mutex_lock(&data->update_lock);
i2c_smbus_write_byte_data(data->client, PCA9532_REG_PWM(maxleds, 1),
data->pwm[1]);
mutex_unlock(&data->update_lock);
}
static enum pca9532_state pca9532_getled(struct pca9532_led *led)
{
struct i2c_client *client = led->client;
struct pca9532_data *data = i2c_get_clientdata(client);
u8 maxleds = data->chip_info->num_leds;
char reg;
enum pca9532_state ret;
mutex_lock(&data->update_lock);
reg = i2c_smbus_read_byte_data(client, LED_REG(maxleds, led->id));
ret = (reg & LED_MASK(led->id)) >> LED_SHIFT(led->id);
mutex_unlock(&data->update_lock);
return ret;
}
#ifdef CONFIG_LEDS_PCA9532_GPIO
static int pca9532_gpio_request_pin(struct gpio_chip *gc, unsigned offset)
{
struct pca9532_data *data = gpiochip_get_data(gc);
struct pca9532_led *led = &data->leds[offset];
if (led->type == PCA9532_TYPE_GPIO)
return 0;
return -EBUSY;
}
static void pca9532_gpio_set_value(struct gpio_chip *gc, unsigned offset, int val)
{
struct pca9532_data *data = gpiochip_get_data(gc);
struct pca9532_led *led = &data->leds[offset];
if (val)
led->state = PCA9532_ON;
else
led->state = PCA9532_OFF;
pca9532_setled(led);
}
static int pca9532_gpio_get_value(struct gpio_chip *gc, unsigned offset)
{
struct pca9532_data *data = gpiochip_get_data(gc);
unsigned char reg;
reg = i2c_smbus_read_byte_data(data->client, PCA9532_REG_INPUT(offset));
return !!(reg & (1 << (offset % 8)));
}
static int pca9532_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
{
/* To use as input ensure pin is not driven */
pca9532_gpio_set_value(gc, offset, 0);
return 0;
}
static int pca9532_gpio_direction_output(struct gpio_chip *gc, unsigned offset, int val)
{
pca9532_gpio_set_value(gc, offset, val);
return 0;
}
#endif /* CONFIG_LEDS_PCA9532_GPIO */
static void pca9532_destroy_devices(struct pca9532_data *data, int n_devs)
{
int i = n_devs;
while (--i >= 0) {
switch (data->leds[i].type) {
case PCA9532_TYPE_NONE:
case PCA9532_TYPE_GPIO:
break;
case PCA9532_TYPE_LED:
led_classdev_unregister(&data->leds[i].ldev);
break;
case PCA9532_TYPE_N2100_BEEP:
if (data->idev != NULL) {
cancel_work_sync(&data->work);
data->idev = NULL;
}
break;
}
}
#ifdef CONFIG_LEDS_PCA9532_GPIO
if (data->gpio.parent)
gpiochip_remove(&data->gpio);
#endif
}
static int pca9532_configure(struct i2c_client *client,
struct pca9532_data *data, struct pca9532_platform_data *pdata)
{
int i, err = 0;
int gpios = 0;
u8 maxleds = data->chip_info->num_leds;
for (i = 0; i < 2; i++) {
data->pwm[i] = pdata->pwm[i];
data->psc[i] = pdata->psc[i];
i2c_smbus_write_byte_data(client, PCA9532_REG_PWM(maxleds, i),
data->pwm[i]);
i2c_smbus_write_byte_data(client, PCA9532_REG_PSC(maxleds, i),
data->psc[i]);
}
for (i = 0; i < data->chip_info->num_leds; i++) {
struct pca9532_led *led = &data->leds[i];
struct pca9532_led *pled = &pdata->leds[i];
led->client = client;
led->id = i;
led->type = pled->type;
switch (led->type) {
case PCA9532_TYPE_NONE:
break;
case PCA9532_TYPE_GPIO:
gpios++;
break;
case PCA9532_TYPE_LED:
if (pled->state == PCA9532_KEEP)
led->state = pca9532_getled(led);
else
led->state = pled->state;
led->name = pled->name;
led->ldev.name = led->name;
led->ldev.default_trigger = pled->default_trigger;
led->ldev.brightness = LED_OFF;
led->ldev.brightness_set_blocking =
pca9532_set_brightness;
led->ldev.blink_set = pca9532_set_blink;
err = led_classdev_register(&client->dev, &led->ldev);
if (err < 0) {
dev_err(&client->dev,
"couldn't register LED %s\n",
led->name);
goto exit;
}
pca9532_setled(led);
break;
case PCA9532_TYPE_N2100_BEEP:
BUG_ON(data->idev);
led->state = PCA9532_PWM1;
pca9532_setled(led);
data->idev = devm_input_allocate_device(&client->dev);
if (data->idev == NULL) {
err = -ENOMEM;
goto exit;
}
data->idev->name = pled->name;
data->idev->phys = "i2c/pca9532";
data->idev->id.bustype = BUS_HOST;
data->idev->id.vendor = 0x001f;
data->idev->id.product = 0x0001;
data->idev->id.version = 0x0100;
data->idev->evbit[0] = BIT_MASK(EV_SND);
data->idev->sndbit[0] = BIT_MASK(SND_BELL) |
BIT_MASK(SND_TONE);
data->idev->event = pca9532_event;
input_set_drvdata(data->idev, data);
INIT_WORK(&data->work, pca9532_input_work);
err = input_register_device(data->idev);
if (err) {
cancel_work_sync(&data->work);
data->idev = NULL;
goto exit;
}
break;
}
}
#ifdef CONFIG_LEDS_PCA9532_GPIO
if (gpios) {
data->gpio.label = "gpio-pca9532";
data->gpio.direction_input = pca9532_gpio_direction_input;
data->gpio.direction_output = pca9532_gpio_direction_output;
data->gpio.set = pca9532_gpio_set_value;
data->gpio.get = pca9532_gpio_get_value;
data->gpio.request = pca9532_gpio_request_pin;
data->gpio.can_sleep = 1;
data->gpio.base = pdata->gpio_base;
data->gpio.ngpio = data->chip_info->num_leds;
data->gpio.parent = &client->dev;
data->gpio.owner = THIS_MODULE;
err = gpiochip_add_data(&data->gpio, data);
if (err) {
/* Use data->gpio.dev as a flag for freeing gpiochip */
data->gpio.parent = NULL;
dev_warn(&client->dev, "could not add gpiochip\n");
} else {
dev_info(&client->dev, "gpios %i...%i\n",
data->gpio.base, data->gpio.base +
data->gpio.ngpio - 1);
}
}
#endif
return 0;
exit:
pca9532_destroy_devices(data, i);
return err;
}
static struct pca9532_platform_data *
pca9532_of_populate_pdata(struct device *dev, struct device_node *np)
{
struct pca9532_platform_data *pdata;
struct device_node *child;
int devid, maxleds;
int i = 0;
const char *state;
devid = (int)(uintptr_t)of_device_get_match_data(dev);
maxleds = pca9532_chip_info_tbl[devid].num_leds;
pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return ERR_PTR(-ENOMEM);
pdata->gpio_base = -1;
of_property_read_u8_array(np, "nxp,pwm", &pdata->pwm[0],
ARRAY_SIZE(pdata->pwm));
of_property_read_u8_array(np, "nxp,psc", &pdata->psc[0],
ARRAY_SIZE(pdata->psc));
for_each_available_child_of_node(np, child) {
if (of_property_read_string(child, "label",
&pdata->leds[i].name))
pdata->leds[i].name = child->name;
of_property_read_u32(child, "type", &pdata->leds[i].type);
of_property_read_string(child, "linux,default-trigger",
&pdata->leds[i].default_trigger);
if (!of_property_read_string(child, "default-state", &state)) {
if (!strcmp(state, "on"))
pdata->leds[i].state = PCA9532_ON;
else if (!strcmp(state, "keep"))
pdata->leds[i].state = PCA9532_KEEP;
}
if (++i >= maxleds) {
of_node_put(child);
break;
}
}
return pdata;
}
static int pca9532_probe(struct i2c_client *client)
{
const struct i2c_device_id *id = i2c_client_get_device_id(client);
int devid;
struct pca9532_data *data = i2c_get_clientdata(client);
struct pca9532_platform_data *pca9532_pdata =
dev_get_platdata(&client->dev);
struct device_node *np = dev_of_node(&client->dev);
if (!pca9532_pdata) {
if (np) {
pca9532_pdata =
pca9532_of_populate_pdata(&client->dev, np);
if (IS_ERR(pca9532_pdata))
return PTR_ERR(pca9532_pdata);
} else {
dev_err(&client->dev, "no platform data\n");
return -EINVAL;
}
devid = (int)(uintptr_t)of_device_get_match_data(&client->dev);
} else {
devid = id->driver_data;
}
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_BYTE_DATA))
return -EIO;
data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->chip_info = &pca9532_chip_info_tbl[devid];
dev_info(&client->dev, "setting platform data\n");
i2c_set_clientdata(client, data);
data->client = client;
mutex_init(&data->update_lock);
return pca9532_configure(client, data, pca9532_pdata);
}
static void pca9532_remove(struct i2c_client *client)
{
struct pca9532_data *data = i2c_get_clientdata(client);
pca9532_destroy_devices(data, data->chip_info->num_leds);
}
module_i2c_driver(pca9532_driver);
MODULE_AUTHOR("Riku Voipio");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("PCA 9532 LED dimmer");
| linux-master | drivers/leds/leds-pca9532.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2019 Sven Van Asbroeck
*/
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/mfd/tps6105x.h>
#include <linux/regmap.h>
struct tps6105x_priv {
struct regmap *regmap;
struct led_classdev cdev;
struct fwnode_handle *fwnode;
};
static void tps6105x_handle_put(void *data)
{
struct tps6105x_priv *priv = data;
fwnode_handle_put(priv->fwnode);
}
static int tps6105x_brightness_set(struct led_classdev *cdev,
enum led_brightness brightness)
{
struct tps6105x_priv *priv = container_of(cdev, struct tps6105x_priv,
cdev);
return regmap_update_bits(priv->regmap, TPS6105X_REG_0,
TPS6105X_REG0_TORCHC_MASK,
brightness << TPS6105X_REG0_TORCHC_SHIFT);
}
static int tps6105x_led_probe(struct platform_device *pdev)
{
struct tps6105x *tps6105x = dev_get_platdata(&pdev->dev);
struct tps6105x_platform_data *pdata = tps6105x->pdata;
struct led_init_data init_data = { };
struct tps6105x_priv *priv;
int ret;
/* This instance is not set for torch mode so bail out */
if (pdata->mode != TPS6105X_MODE_TORCH) {
dev_info(&pdev->dev,
"chip not in torch mode, exit probe");
return -EINVAL;
}
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
/* fwnode/devicetree is optional. NULL is allowed for priv->fwnode */
priv->fwnode = device_get_next_child_node(pdev->dev.parent, NULL);
ret = devm_add_action_or_reset(&pdev->dev, tps6105x_handle_put, priv);
if (ret)
return ret;
priv->regmap = tps6105x->regmap;
priv->cdev.brightness_set_blocking = tps6105x_brightness_set;
priv->cdev.max_brightness = 7;
init_data.devicename = "tps6105x";
init_data.default_label = ":torch";
init_data.fwnode = priv->fwnode;
ret = regmap_update_bits(tps6105x->regmap, TPS6105X_REG_0,
TPS6105X_REG0_MODE_MASK |
TPS6105X_REG0_TORCHC_MASK,
TPS6105X_REG0_MODE_TORCH <<
TPS6105X_REG0_MODE_SHIFT);
if (ret)
return ret;
return devm_led_classdev_register_ext(&pdev->dev, &priv->cdev,
&init_data);
}
static struct platform_driver led_driver = {
.probe = tps6105x_led_probe,
.driver = {
.name = "tps6105x-leds",
},
};
module_platform_driver(led_driver);
MODULE_DESCRIPTION("TPS6105x LED driver");
MODULE_AUTHOR("Sven Van Asbroeck <[email protected]>");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/leds-tps6105x.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* LEDs driver for Dialog Semiconductor DA9030/DA9034
*
* Copyright (C) 2008 Compulab, Ltd.
* Mike Rapoport <[email protected]>
*
* Copyright (C) 2006-2008 Marvell International Ltd.
* Eric Miao <[email protected]>
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/leds.h>
#include <linux/mfd/da903x.h>
#include <linux/slab.h>
#define DA9030_LED1_CONTROL 0x20
#define DA9030_LED2_CONTROL 0x21
#define DA9030_LED3_CONTROL 0x22
#define DA9030_LED4_CONTROL 0x23
#define DA9030_LEDPC_CONTROL 0x24
#define DA9030_MISC_CONTROL_A 0x26 /* Vibrator Control */
#define DA9034_LED1_CONTROL 0x35
#define DA9034_LED2_CONTROL 0x36
#define DA9034_VIBRA 0x40
struct da903x_led {
struct led_classdev cdev;
struct device *master;
int id;
int flags;
};
#define DA9030_LED_OFFSET(id) ((id) - DA9030_ID_LED_1)
#define DA9034_LED_OFFSET(id) ((id) - DA9034_ID_LED_1)
static int da903x_led_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
struct da903x_led *led =
container_of(led_cdev, struct da903x_led, cdev);
uint8_t val;
int offset, ret = -EINVAL;
switch (led->id) {
case DA9030_ID_LED_1:
case DA9030_ID_LED_2:
case DA9030_ID_LED_3:
case DA9030_ID_LED_4:
case DA9030_ID_LED_PC:
offset = DA9030_LED_OFFSET(led->id);
val = led->flags & ~0x87;
val |= value ? 0x80 : 0; /* EN bit */
val |= (0x7 - (value >> 5)) & 0x7; /* PWM<2:0> */
ret = da903x_write(led->master, DA9030_LED1_CONTROL + offset,
val);
break;
case DA9030_ID_VIBRA:
val = led->flags & ~0x80;
val |= value ? 0x80 : 0; /* EN bit */
ret = da903x_write(led->master, DA9030_MISC_CONTROL_A, val);
break;
case DA9034_ID_LED_1:
case DA9034_ID_LED_2:
offset = DA9034_LED_OFFSET(led->id);
val = (value * 0x5f / LED_FULL) & 0x7f;
val |= (led->flags & DA9034_LED_RAMP) ? 0x80 : 0;
ret = da903x_write(led->master, DA9034_LED1_CONTROL + offset,
val);
break;
case DA9034_ID_VIBRA:
val = value & 0xfe;
ret = da903x_write(led->master, DA9034_VIBRA, val);
break;
}
return ret;
}
static int da903x_led_probe(struct platform_device *pdev)
{
struct led_info *pdata = dev_get_platdata(&pdev->dev);
struct da903x_led *led;
int id, ret;
if (pdata == NULL)
return 0;
id = pdev->id;
if (!((id >= DA9030_ID_LED_1 && id <= DA9030_ID_VIBRA) ||
(id >= DA9034_ID_LED_1 && id <= DA9034_ID_VIBRA))) {
dev_err(&pdev->dev, "invalid LED ID (%d) specified\n", id);
return -EINVAL;
}
led = devm_kzalloc(&pdev->dev, sizeof(struct da903x_led), GFP_KERNEL);
if (!led)
return -ENOMEM;
led->cdev.name = pdata->name;
led->cdev.default_trigger = pdata->default_trigger;
led->cdev.brightness_set_blocking = da903x_led_set;
led->cdev.brightness = LED_OFF;
led->id = id;
led->flags = pdata->flags;
led->master = pdev->dev.parent;
ret = led_classdev_register(led->master, &led->cdev);
if (ret) {
dev_err(&pdev->dev, "failed to register LED %d\n", id);
return ret;
}
platform_set_drvdata(pdev, led);
return 0;
}
static int da903x_led_remove(struct platform_device *pdev)
{
struct da903x_led *led = platform_get_drvdata(pdev);
led_classdev_unregister(&led->cdev);
return 0;
}
static struct platform_driver da903x_led_driver = {
.driver = {
.name = "da903x-led",
},
.probe = da903x_led_probe,
.remove = da903x_led_remove,
};
module_platform_driver(da903x_led_driver);
MODULE_DESCRIPTION("LEDs driver for Dialog Semiconductor DA9030/DA9034");
MODULE_AUTHOR("Eric Miao <[email protected]>");
MODULE_AUTHOR("Mike Rapoport <[email protected]>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:da903x-led");
| linux-master | drivers/leds/leds-da903x.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Generic Syscon LEDs Driver
*
* Copyright (c) 2014, Linaro Limited
* Author: Linus Walleij <[email protected]>
*/
#include <linux/io.h>
#include <linux/init.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/stat.h>
#include <linux/slab.h>
#include <linux/mfd/syscon.h>
#include <linux/regmap.h>
#include <linux/leds.h>
/**
* struct syscon_led - state container for syscon based LEDs
* @cdev: LED class device for this LED
* @map: regmap to access the syscon device backing this LED
* @offset: the offset into the syscon regmap for the LED register
* @mask: the bit in the register corresponding to the LED
* @state: current state of the LED
*/
struct syscon_led {
struct led_classdev cdev;
struct regmap *map;
u32 offset;
u32 mask;
bool state;
};
static void syscon_led_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
struct syscon_led *sled =
container_of(led_cdev, struct syscon_led, cdev);
u32 val;
int ret;
if (value == LED_OFF) {
val = 0;
sled->state = false;
} else {
val = sled->mask;
sled->state = true;
}
ret = regmap_update_bits(sled->map, sled->offset, sled->mask, val);
if (ret < 0)
dev_err(sled->cdev.dev, "error updating LED status\n");
}
static int syscon_led_probe(struct platform_device *pdev)
{
struct led_init_data init_data = {};
struct device *dev = &pdev->dev;
struct device_node *np = dev_of_node(dev);
struct device *parent;
struct regmap *map;
struct syscon_led *sled;
enum led_default_state state;
u32 value;
int ret;
parent = dev->parent;
if (!parent) {
dev_err(dev, "no parent for syscon LED\n");
return -ENODEV;
}
map = syscon_node_to_regmap(dev_of_node(parent));
if (IS_ERR(map)) {
dev_err(dev, "no regmap for syscon LED parent\n");
return PTR_ERR(map);
}
sled = devm_kzalloc(dev, sizeof(*sled), GFP_KERNEL);
if (!sled)
return -ENOMEM;
sled->map = map;
if (of_property_read_u32(np, "offset", &sled->offset))
return -EINVAL;
if (of_property_read_u32(np, "mask", &sled->mask))
return -EINVAL;
init_data.fwnode = of_fwnode_handle(np);
state = led_init_default_state_get(init_data.fwnode);
switch (state) {
case LEDS_DEFSTATE_ON:
ret = regmap_update_bits(map, sled->offset, sled->mask, sled->mask);
if (ret < 0)
return ret;
sled->state = true;
break;
case LEDS_DEFSTATE_KEEP:
ret = regmap_read(map, sled->offset, &value);
if (ret < 0)
return ret;
sled->state = !!(value & sled->mask);
break;
default:
ret = regmap_update_bits(map, sled->offset, sled->mask, 0);
if (ret < 0)
return ret;
sled->state = false;
}
sled->cdev.brightness_set = syscon_led_set;
ret = devm_led_classdev_register_ext(dev, &sled->cdev, &init_data);
if (ret < 0)
return ret;
platform_set_drvdata(pdev, sled);
dev_info(dev, "registered LED %s\n", sled->cdev.name);
return 0;
}
static const struct of_device_id of_syscon_leds_match[] = {
{ .compatible = "register-bit-led", },
{},
};
static struct platform_driver syscon_led_driver = {
.probe = syscon_led_probe,
.driver = {
.name = "leds-syscon",
.of_match_table = of_syscon_leds_match,
.suppress_bind_attrs = true,
},
};
builtin_platform_driver(syscon_led_driver);
| linux-master | drivers/leds/leds-syscon.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* leds-tca6507
*
* The TCA6507 is a programmable LED controller that can drive 7
* separate lines either by holding them low, or by pulsing them
* with modulated width.
* The modulation can be varied in a simple pattern to produce a
* blink or double-blink.
*
* This driver can configure each line either as a 'GPIO' which is
* out-only (pull-up resistor required) or as an LED with variable
* brightness and hardware-assisted blinking.
*
* Apart from OFF and ON there are three programmable brightness
* levels which can be programmed from 0 to 15 and indicate how many
* 500usec intervals in each 8msec that the led is 'on'. The levels
* are named MASTER, BANK0 and BANK1.
*
* There are two different blink rates that can be programmed, each
* with separate time for rise, on, fall, off and second-off. Thus if
* 3 or more different non-trivial rates are required, software must
* be used for the extra rates. The two different blink rates must
* align with the two levels BANK0 and BANK1. This driver does not
* support double-blink so 'second-off' always matches 'off'.
*
* Only 16 different times can be programmed in a roughly logarithmic
* scale from 64ms to 16320ms. To be precise the possible times are:
* 0, 64, 128, 192, 256, 384, 512, 768,
* 1024, 1536, 2048, 3072, 4096, 5760, 8128, 16320
*
* Times that cannot be closely matched with these must be handled in
* software. This driver allows 12.5% error in matching.
*
* This driver does not allow rise/fall rates to be set explicitly.
* When trying to match a given 'on' or 'off' period, an appropriate
* pair of 'change' and 'hold' times are chosen to get a close match.
* If the target delay is even, the 'change' number will be the
* smaller; if odd, the 'hold' number will be the smaller.
* Choosing pairs of delays with 12.5% errors allows us to match
* delays in the ranges: 56-72, 112-144, 168-216, 224-27504,
* 28560-36720.
* 26% of the achievable sums can be matched by multiple pairings.
* For example 1536 == 1536+0, 1024+512, or 768+768.
* This driver will always choose the pairing with the least
* maximum - 768+768 in this case. Other pairings are not available.
*
* Access to the 3 levels and 2 blinks are on a first-come,
* first-served basis. Access can be shared by multiple leds if they
* have the same level and either same blink rates, or some don't
* blink. When a led changes, it relinquishes access and tries again,
* so it might lose access to hardware blink.
*
* If a blink engine cannot be allocated, software blink is used. If
* the desired brightness cannot be allocated, the closest available
* non-zero brightness is used. As 'full' is always available, the
* worst case would be to have two different blink rates at '1', with
* Max at '2', then other leds will have to choose between '2' and
* '16'. Hopefully this is not likely.
*
* Each bank (BANK0 and BANK1) has two usage counts - LEDs using the
* brightness and LEDs using the blink. It can only be reprogrammed
* when the appropriate counter is zero. The MASTER level has a
* single usage count.
*
* Each LED has programmable 'on' and 'off' time as milliseconds.
* With each there is a flag saying if it was explicitly requested or
* defaulted. Similarly the banks know if each time was explicit or a
* default. Defaults are permitted to be changed freely - they are
* not recognised when matching.
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/leds.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/gpio/driver.h>
#include <linux/property.h>
#include <linux/workqueue.h>
/* LED select registers determine the source that drives LED outputs */
#define TCA6507_LS_LED_OFF 0x0 /* Output HI-Z (off) */
#define TCA6507_LS_LED_OFF1 0x1 /* Output HI-Z (off) - not used */
#define TCA6507_LS_LED_PWM0 0x2 /* Output LOW with Bank0 rate */
#define TCA6507_LS_LED_PWM1 0x3 /* Output LOW with Bank1 rate */
#define TCA6507_LS_LED_ON 0x4 /* Output LOW (on) */
#define TCA6507_LS_LED_MIR 0x5 /* Output LOW with Master Intensity */
#define TCA6507_LS_BLINK0 0x6 /* Blink at Bank0 rate */
#define TCA6507_LS_BLINK1 0x7 /* Blink at Bank1 rate */
struct tca6507_platform_data {
struct led_platform_data leds;
#ifdef CONFIG_GPIOLIB
int gpio_base;
#endif
};
#define TCA6507_MAKE_GPIO 1
enum {
BANK0,
BANK1,
MASTER,
};
static int bank_source[3] = {
TCA6507_LS_LED_PWM0,
TCA6507_LS_LED_PWM1,
TCA6507_LS_LED_MIR,
};
static int blink_source[2] = {
TCA6507_LS_BLINK0,
TCA6507_LS_BLINK1,
};
/* PWM registers */
#define TCA6507_REG_CNT 11
/*
* 0x00, 0x01, 0x02 encode the TCA6507_LS_* values, each output
* owns one bit in each register
*/
#define TCA6507_FADE_ON 0x03
#define TCA6507_FULL_ON 0x04
#define TCA6507_FADE_OFF 0x05
#define TCA6507_FIRST_OFF 0x06
#define TCA6507_SECOND_OFF 0x07
#define TCA6507_MAX_INTENSITY 0x08
#define TCA6507_MASTER_INTENSITY 0x09
#define TCA6507_INITIALIZE 0x0A
#define INIT_CODE 0x8
#define TIMECODES 16
static int time_codes[TIMECODES] = {
0, 64, 128, 192, 256, 384, 512, 768,
1024, 1536, 2048, 3072, 4096, 5760, 8128, 16320
};
/* Convert an led.brightness level (0..255) to a TCA6507 level (0..15) */
static inline int TO_LEVEL(int brightness)
{
return brightness >> 4;
}
/* ...and convert back */
static inline int TO_BRIGHT(int level)
{
if (level)
return (level << 4) | 0xf;
return 0;
}
#define NUM_LEDS 7
struct tca6507_chip {
int reg_set; /* One bit per register where
* a '1' means the register
* should be written */
u8 reg_file[TCA6507_REG_CNT];
/* Bank 2 is Master Intensity and doesn't use times */
struct bank {
int level;
int ontime, offtime;
int on_dflt, off_dflt;
int time_use, level_use;
} bank[3];
struct i2c_client *client;
struct work_struct work;
spinlock_t lock;
struct tca6507_led {
struct tca6507_chip *chip;
struct led_classdev led_cdev;
int num;
int ontime, offtime;
int on_dflt, off_dflt;
int bank; /* Bank used, or -1 */
int blink; /* Set if hardware-blinking */
} leds[NUM_LEDS];
#ifdef CONFIG_GPIOLIB
struct gpio_chip gpio;
int gpio_map[NUM_LEDS];
#endif
};
static const struct i2c_device_id tca6507_id[] = {
{ "tca6507" },
{ }
};
MODULE_DEVICE_TABLE(i2c, tca6507_id);
static int choose_times(int msec, int *c1p, int *c2p)
{
/*
* Choose two timecodes which add to 'msec' as near as
* possible. The first returned is the 'on' or 'off' time.
* The second is to be used as a 'fade-on' or 'fade-off' time.
* If 'msec' is even, the first will not be smaller than the
* second. If 'msec' is odd, the first will not be larger
* than the second.
* If we cannot get a sum within 1/8 of 'msec' fail with
* -EINVAL, otherwise return the sum that was achieved, plus 1
* if the first is smaller.
* If two possibilities are equally good (e.g. 512+0,
* 256+256), choose the first pair so there is more
* change-time visible (i.e. it is softer).
*/
int c1, c2;
int tmax = msec * 9 / 8;
int tmin = msec * 7 / 8;
int diff = 65536;
/* We start at '1' to ensure we never even think of choosing a
* total time of '0'.
*/
for (c1 = 1; c1 < TIMECODES; c1++) {
int t = time_codes[c1];
if (t*2 < tmin)
continue;
if (t > tmax)
break;
for (c2 = 0; c2 <= c1; c2++) {
int tt = t + time_codes[c2];
int d;
if (tt < tmin)
continue;
if (tt > tmax)
break;
/* This works! */
d = abs(msec - tt);
if (d >= diff)
continue;
/* Best yet */
*c1p = c1;
*c2p = c2;
diff = d;
if (d == 0)
return msec;
}
}
if (diff < 65536) {
int actual;
if (msec & 1) {
swap(*c2p, *c1p);
}
actual = time_codes[*c1p] + time_codes[*c2p];
if (*c1p < *c2p)
return actual + 1;
else
return actual;
}
/* No close match */
return -EINVAL;
}
/*
* Update the register file with the appropriate 3-bit state for the
* given led.
*/
static void set_select(struct tca6507_chip *tca, int led, int val)
{
int mask = (1 << led);
int bit;
for (bit = 0; bit < 3; bit++) {
int n = tca->reg_file[bit] & ~mask;
if (val & (1 << bit))
n |= mask;
if (tca->reg_file[bit] != n) {
tca->reg_file[bit] = n;
tca->reg_set |= (1 << bit);
}
}
}
/* Update the register file with the appropriate 4-bit code for one
* bank or other. This can be used for timers, for levels, or for
* initialization.
*/
static void set_code(struct tca6507_chip *tca, int reg, int bank, int new)
{
int mask = 0xF;
int n;
if (bank) {
mask <<= 4;
new <<= 4;
}
n = tca->reg_file[reg] & ~mask;
n |= new;
if (tca->reg_file[reg] != n) {
tca->reg_file[reg] = n;
tca->reg_set |= 1 << reg;
}
}
/* Update brightness level. */
static void set_level(struct tca6507_chip *tca, int bank, int level)
{
switch (bank) {
case BANK0:
case BANK1:
set_code(tca, TCA6507_MAX_INTENSITY, bank, level);
break;
case MASTER:
set_code(tca, TCA6507_MASTER_INTENSITY, 0, level);
break;
}
tca->bank[bank].level = level;
}
/* Record all relevant time codes for a given bank */
static void set_times(struct tca6507_chip *tca, int bank)
{
int c1, c2;
int result;
result = choose_times(tca->bank[bank].ontime, &c1, &c2);
if (result < 0)
return;
dev_dbg(&tca->client->dev,
"Chose on times %d(%d) %d(%d) for %dms\n",
c1, time_codes[c1],
c2, time_codes[c2], tca->bank[bank].ontime);
set_code(tca, TCA6507_FADE_ON, bank, c2);
set_code(tca, TCA6507_FULL_ON, bank, c1);
tca->bank[bank].ontime = result;
result = choose_times(tca->bank[bank].offtime, &c1, &c2);
dev_dbg(&tca->client->dev,
"Chose off times %d(%d) %d(%d) for %dms\n",
c1, time_codes[c1],
c2, time_codes[c2], tca->bank[bank].offtime);
set_code(tca, TCA6507_FADE_OFF, bank, c2);
set_code(tca, TCA6507_FIRST_OFF, bank, c1);
set_code(tca, TCA6507_SECOND_OFF, bank, c1);
tca->bank[bank].offtime = result;
set_code(tca, TCA6507_INITIALIZE, bank, INIT_CODE);
}
/* Write all needed register of tca6507 */
static void tca6507_work(struct work_struct *work)
{
struct tca6507_chip *tca = container_of(work, struct tca6507_chip,
work);
struct i2c_client *cl = tca->client;
int set;
u8 file[TCA6507_REG_CNT];
int r;
spin_lock_irq(&tca->lock);
set = tca->reg_set;
memcpy(file, tca->reg_file, TCA6507_REG_CNT);
tca->reg_set = 0;
spin_unlock_irq(&tca->lock);
for (r = 0; r < TCA6507_REG_CNT; r++)
if (set & (1<<r))
i2c_smbus_write_byte_data(cl, r, file[r]);
}
static void led_release(struct tca6507_led *led)
{
/* If led owns any resource, release it. */
struct tca6507_chip *tca = led->chip;
if (led->bank >= 0) {
struct bank *b = tca->bank + led->bank;
if (led->blink)
b->time_use--;
b->level_use--;
}
led->blink = 0;
led->bank = -1;
}
static int led_prepare(struct tca6507_led *led)
{
/* Assign this led to a bank, configuring that bank if
* necessary. */
int level = TO_LEVEL(led->led_cdev.brightness);
struct tca6507_chip *tca = led->chip;
int c1, c2;
int i;
struct bank *b;
int need_init = 0;
led->led_cdev.brightness = TO_BRIGHT(level);
if (level == 0) {
set_select(tca, led->num, TCA6507_LS_LED_OFF);
return 0;
}
if (led->ontime == 0 || led->offtime == 0) {
/*
* Just set the brightness, choosing first usable
* bank. If none perfect, choose best. Count
* backwards so we check MASTER bank first to avoid
* wasting a timer.
*/
int best = -1;/* full-on */
int diff = 15-level;
if (level == 15) {
set_select(tca, led->num, TCA6507_LS_LED_ON);
return 0;
}
for (i = MASTER; i >= BANK0; i--) {
int d;
if (tca->bank[i].level == level ||
tca->bank[i].level_use == 0) {
best = i;
break;
}
d = abs(level - tca->bank[i].level);
if (d < diff) {
diff = d;
best = i;
}
}
if (best == -1) {
/* Best brightness is full-on */
set_select(tca, led->num, TCA6507_LS_LED_ON);
led->led_cdev.brightness = LED_FULL;
return 0;
}
if (!tca->bank[best].level_use)
set_level(tca, best, level);
tca->bank[best].level_use++;
led->bank = best;
set_select(tca, led->num, bank_source[best]);
led->led_cdev.brightness = TO_BRIGHT(tca->bank[best].level);
return 0;
}
/*
* We have on/off time so we need to try to allocate a timing
* bank. First check if times are compatible with hardware
* and give up if not.
*/
if (choose_times(led->ontime, &c1, &c2) < 0)
return -EINVAL;
if (choose_times(led->offtime, &c1, &c2) < 0)
return -EINVAL;
for (i = BANK0; i <= BANK1; i++) {
if (tca->bank[i].level_use == 0)
/* not in use - it is ours! */
break;
if (tca->bank[i].level != level)
/* Incompatible level - skip */
/* FIX: if timer matches we maybe should consider
* this anyway...
*/
continue;
if (tca->bank[i].time_use == 0)
/* Timer not in use, and level matches - use it */
break;
if (!(tca->bank[i].on_dflt ||
led->on_dflt ||
tca->bank[i].ontime == led->ontime))
/* on time is incompatible */
continue;
if (!(tca->bank[i].off_dflt ||
led->off_dflt ||
tca->bank[i].offtime == led->offtime))
/* off time is incompatible */
continue;
/* looks like a suitable match */
break;
}
if (i > BANK1)
/* Nothing matches - how sad */
return -EINVAL;
b = &tca->bank[i];
if (b->level_use == 0)
set_level(tca, i, level);
b->level_use++;
led->bank = i;
if (b->on_dflt ||
!led->on_dflt ||
b->time_use == 0) {
b->ontime = led->ontime;
b->on_dflt = led->on_dflt;
need_init = 1;
}
if (b->off_dflt ||
!led->off_dflt ||
b->time_use == 0) {
b->offtime = led->offtime;
b->off_dflt = led->off_dflt;
need_init = 1;
}
if (need_init)
set_times(tca, i);
led->ontime = b->ontime;
led->offtime = b->offtime;
b->time_use++;
led->blink = 1;
led->led_cdev.brightness = TO_BRIGHT(b->level);
set_select(tca, led->num, blink_source[i]);
return 0;
}
static int led_assign(struct tca6507_led *led)
{
struct tca6507_chip *tca = led->chip;
int err;
unsigned long flags;
spin_lock_irqsave(&tca->lock, flags);
led_release(led);
err = led_prepare(led);
if (err) {
/*
* Can only fail on timer setup. In that case we need
* to re-establish as steady level.
*/
led->ontime = 0;
led->offtime = 0;
led_prepare(led);
}
spin_unlock_irqrestore(&tca->lock, flags);
if (tca->reg_set)
schedule_work(&tca->work);
return err;
}
static void tca6507_brightness_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
struct tca6507_led *led = container_of(led_cdev, struct tca6507_led,
led_cdev);
led->led_cdev.brightness = brightness;
led->ontime = 0;
led->offtime = 0;
led_assign(led);
}
static int tca6507_blink_set(struct led_classdev *led_cdev,
unsigned long *delay_on,
unsigned long *delay_off)
{
struct tca6507_led *led = container_of(led_cdev, struct tca6507_led,
led_cdev);
if (*delay_on == 0)
led->on_dflt = 1;
else if (delay_on != &led_cdev->blink_delay_on)
led->on_dflt = 0;
led->ontime = *delay_on;
if (*delay_off == 0)
led->off_dflt = 1;
else if (delay_off != &led_cdev->blink_delay_off)
led->off_dflt = 0;
led->offtime = *delay_off;
if (led->ontime == 0)
led->ontime = 512;
if (led->offtime == 0)
led->offtime = 512;
if (led->led_cdev.brightness == LED_OFF)
led->led_cdev.brightness = LED_FULL;
if (led_assign(led) < 0) {
led->ontime = 0;
led->offtime = 0;
led->led_cdev.brightness = LED_OFF;
return -EINVAL;
}
*delay_on = led->ontime;
*delay_off = led->offtime;
return 0;
}
#ifdef CONFIG_GPIOLIB
static void tca6507_gpio_set_value(struct gpio_chip *gc,
unsigned offset, int val)
{
struct tca6507_chip *tca = gpiochip_get_data(gc);
unsigned long flags;
spin_lock_irqsave(&tca->lock, flags);
/*
* 'OFF' is floating high, and 'ON' is pulled down, so it has
* the inverse sense of 'val'.
*/
set_select(tca, tca->gpio_map[offset],
val ? TCA6507_LS_LED_OFF : TCA6507_LS_LED_ON);
spin_unlock_irqrestore(&tca->lock, flags);
if (tca->reg_set)
schedule_work(&tca->work);
}
static int tca6507_gpio_direction_output(struct gpio_chip *gc,
unsigned offset, int val)
{
tca6507_gpio_set_value(gc, offset, val);
return 0;
}
static int tca6507_probe_gpios(struct device *dev,
struct tca6507_chip *tca,
struct tca6507_platform_data *pdata)
{
int err;
int i = 0;
int gpios = 0;
for (i = 0; i < NUM_LEDS; i++)
if (pdata->leds.leds[i].name && pdata->leds.leds[i].flags) {
/* Configure as a gpio */
tca->gpio_map[gpios] = i;
gpios++;
}
if (!gpios)
return 0;
tca->gpio.label = "gpio-tca6507";
tca->gpio.ngpio = gpios;
tca->gpio.base = pdata->gpio_base;
tca->gpio.owner = THIS_MODULE;
tca->gpio.direction_output = tca6507_gpio_direction_output;
tca->gpio.set = tca6507_gpio_set_value;
tca->gpio.parent = dev;
err = gpiochip_add_data(&tca->gpio, tca);
if (err) {
tca->gpio.ngpio = 0;
return err;
}
return 0;
}
static void tca6507_remove_gpio(struct tca6507_chip *tca)
{
if (tca->gpio.ngpio)
gpiochip_remove(&tca->gpio);
}
#else /* CONFIG_GPIOLIB */
static int tca6507_probe_gpios(struct device *dev,
struct tca6507_chip *tca,
struct tca6507_platform_data *pdata)
{
return 0;
}
static void tca6507_remove_gpio(struct tca6507_chip *tca)
{
}
#endif /* CONFIG_GPIOLIB */
static struct tca6507_platform_data *
tca6507_led_dt_init(struct device *dev)
{
struct tca6507_platform_data *pdata;
struct fwnode_handle *child;
struct led_info *tca_leds;
int count;
count = device_get_child_node_count(dev);
if (!count || count > NUM_LEDS)
return ERR_PTR(-ENODEV);
tca_leds = devm_kcalloc(dev, NUM_LEDS, sizeof(struct led_info),
GFP_KERNEL);
if (!tca_leds)
return ERR_PTR(-ENOMEM);
device_for_each_child_node(dev, child) {
struct led_info led;
u32 reg;
int ret;
if (fwnode_property_read_string(child, "label", &led.name))
led.name = fwnode_get_name(child);
if (fwnode_property_read_string(child, "linux,default-trigger",
&led.default_trigger))
led.default_trigger = NULL;
led.flags = 0;
if (fwnode_device_is_compatible(child, "gpio"))
led.flags |= TCA6507_MAKE_GPIO;
ret = fwnode_property_read_u32(child, "reg", ®);
if (ret || reg >= NUM_LEDS) {
fwnode_handle_put(child);
return ERR_PTR(ret ? : -EINVAL);
}
tca_leds[reg] = led;
}
pdata = devm_kzalloc(dev, sizeof(struct tca6507_platform_data),
GFP_KERNEL);
if (!pdata)
return ERR_PTR(-ENOMEM);
pdata->leds.leds = tca_leds;
pdata->leds.num_leds = NUM_LEDS;
#ifdef CONFIG_GPIOLIB
pdata->gpio_base = -1;
#endif
return pdata;
}
static const struct of_device_id __maybe_unused of_tca6507_leds_match[] = {
{ .compatible = "ti,tca6507", },
{},
};
MODULE_DEVICE_TABLE(of, of_tca6507_leds_match);
static int tca6507_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct i2c_adapter *adapter;
struct tca6507_chip *tca;
struct tca6507_platform_data *pdata;
int err;
int i = 0;
adapter = client->adapter;
if (!i2c_check_functionality(adapter, I2C_FUNC_I2C))
return -EIO;
pdata = tca6507_led_dt_init(dev);
if (IS_ERR(pdata)) {
dev_err(dev, "Need %d entries in platform-data list\n", NUM_LEDS);
return PTR_ERR(pdata);
}
tca = devm_kzalloc(dev, sizeof(*tca), GFP_KERNEL);
if (!tca)
return -ENOMEM;
tca->client = client;
INIT_WORK(&tca->work, tca6507_work);
spin_lock_init(&tca->lock);
i2c_set_clientdata(client, tca);
for (i = 0; i < NUM_LEDS; i++) {
struct tca6507_led *l = tca->leds + i;
l->chip = tca;
l->num = i;
if (pdata->leds.leds[i].name && !pdata->leds.leds[i].flags) {
l->led_cdev.name = pdata->leds.leds[i].name;
l->led_cdev.default_trigger
= pdata->leds.leds[i].default_trigger;
l->led_cdev.brightness_set = tca6507_brightness_set;
l->led_cdev.blink_set = tca6507_blink_set;
l->bank = -1;
err = led_classdev_register(dev, &l->led_cdev);
if (err < 0)
goto exit;
}
}
err = tca6507_probe_gpios(dev, tca, pdata);
if (err)
goto exit;
/* set all registers to known state - zero */
tca->reg_set = 0x7f;
schedule_work(&tca->work);
return 0;
exit:
while (i--) {
if (tca->leds[i].led_cdev.name)
led_classdev_unregister(&tca->leds[i].led_cdev);
}
return err;
}
static void tca6507_remove(struct i2c_client *client)
{
int i;
struct tca6507_chip *tca = i2c_get_clientdata(client);
struct tca6507_led *tca_leds = tca->leds;
for (i = 0; i < NUM_LEDS; i++) {
if (tca_leds[i].led_cdev.name)
led_classdev_unregister(&tca_leds[i].led_cdev);
}
tca6507_remove_gpio(tca);
cancel_work_sync(&tca->work);
}
static struct i2c_driver tca6507_driver = {
.driver = {
.name = "leds-tca6507",
.of_match_table = of_match_ptr(of_tca6507_leds_match),
},
.probe = tca6507_probe,
.remove = tca6507_remove,
.id_table = tca6507_id,
};
module_i2c_driver(tca6507_driver);
MODULE_AUTHOR("NeilBrown <[email protected]>");
MODULE_DESCRIPTION("TCA6507 LED/GPO driver");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/leds-tca6507.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* PowerNV LED Driver
*
* Copyright IBM Corp. 2015
*
* Author: Vasant Hegde <[email protected]>
* Author: Anshuman Khandual <[email protected]>
*/
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <asm/opal.h>
/* Map LED type to description. */
struct led_type_map {
const int type;
const char *desc;
};
static const struct led_type_map led_type_map[] = {
{OPAL_SLOT_LED_TYPE_ID, "identify"},
{OPAL_SLOT_LED_TYPE_FAULT, "fault"},
{OPAL_SLOT_LED_TYPE_ATTN, "attention"},
{-1, NULL},
};
struct powernv_led_common {
/*
* By default unload path resets all the LEDs. But on PowerNV
* platform we want to retain LED state across reboot as these
* are controlled by firmware. Also service processor can modify
* the LEDs independent of OS. Hence avoid resetting LEDs in
* unload path.
*/
bool led_disabled;
/* Max supported LED type */
__be64 max_led_type;
/* glabal lock */
struct mutex lock;
};
/* PowerNV LED data */
struct powernv_led_data {
struct led_classdev cdev;
char *loc_code; /* LED location code */
int led_type; /* OPAL_SLOT_LED_TYPE_* */
struct powernv_led_common *common;
};
/* Returns OPAL_SLOT_LED_TYPE_* for given led type string */
static int powernv_get_led_type(const char *led_type_desc)
{
int i;
for (i = 0; i < ARRAY_SIZE(led_type_map); i++)
if (!strcmp(led_type_map[i].desc, led_type_desc))
return led_type_map[i].type;
return -1;
}
/*
* This commits the state change of the requested LED through an OPAL call.
* This function is called from work queue task context when ever it gets
* scheduled. This function can sleep at opal_async_wait_response call.
*/
static int powernv_led_set(struct powernv_led_data *powernv_led,
enum led_brightness value)
{
int rc, token;
u64 led_mask, led_value = 0;
__be64 max_type;
struct opal_msg msg;
struct device *dev = powernv_led->cdev.dev;
struct powernv_led_common *powernv_led_common = powernv_led->common;
/* Prepare for the OPAL call */
max_type = powernv_led_common->max_led_type;
led_mask = OPAL_SLOT_LED_STATE_ON << powernv_led->led_type;
if (value)
led_value = led_mask;
/* OPAL async call */
token = opal_async_get_token_interruptible();
if (token < 0) {
if (token != -ERESTARTSYS)
dev_err(dev, "%s: Couldn't get OPAL async token\n",
__func__);
return token;
}
rc = opal_leds_set_ind(token, powernv_led->loc_code,
led_mask, led_value, &max_type);
if (rc != OPAL_ASYNC_COMPLETION) {
dev_err(dev, "%s: OPAL set LED call failed for %s [rc=%d]\n",
__func__, powernv_led->loc_code, rc);
goto out_token;
}
rc = opal_async_wait_response(token, &msg);
if (rc) {
dev_err(dev,
"%s: Failed to wait for the async response [rc=%d]\n",
__func__, rc);
goto out_token;
}
rc = opal_get_async_rc(msg);
if (rc != OPAL_SUCCESS)
dev_err(dev, "%s : OAPL async call returned failed [rc=%d]\n",
__func__, rc);
out_token:
opal_async_release_token(token);
return rc;
}
/*
* This function fetches the LED state for a given LED type for
* mentioned LED classdev structure.
*/
static enum led_brightness powernv_led_get(struct powernv_led_data *powernv_led)
{
int rc;
__be64 mask, value, max_type;
u64 led_mask, led_value;
struct device *dev = powernv_led->cdev.dev;
struct powernv_led_common *powernv_led_common = powernv_led->common;
/* Fetch all LED status */
mask = cpu_to_be64(0);
value = cpu_to_be64(0);
max_type = powernv_led_common->max_led_type;
rc = opal_leds_get_ind(powernv_led->loc_code,
&mask, &value, &max_type);
if (rc != OPAL_SUCCESS && rc != OPAL_PARTIAL) {
dev_err(dev, "%s: OPAL get led call failed [rc=%d]\n",
__func__, rc);
return LED_OFF;
}
led_mask = be64_to_cpu(mask);
led_value = be64_to_cpu(value);
/* LED status available */
if (!((led_mask >> powernv_led->led_type) & OPAL_SLOT_LED_STATE_ON)) {
dev_err(dev, "%s: LED status not available for %s\n",
__func__, powernv_led->cdev.name);
return LED_OFF;
}
/* LED status value */
if ((led_value >> powernv_led->led_type) & OPAL_SLOT_LED_STATE_ON)
return LED_FULL;
return LED_OFF;
}
/*
* LED classdev 'brightness_get' function. This schedules work
* to update LED state.
*/
static int powernv_brightness_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
struct powernv_led_data *powernv_led =
container_of(led_cdev, struct powernv_led_data, cdev);
struct powernv_led_common *powernv_led_common = powernv_led->common;
int rc;
/* Do not modify LED in unload path */
if (powernv_led_common->led_disabled)
return 0;
mutex_lock(&powernv_led_common->lock);
rc = powernv_led_set(powernv_led, value);
mutex_unlock(&powernv_led_common->lock);
return rc;
}
/* LED classdev 'brightness_get' function */
static enum led_brightness powernv_brightness_get(struct led_classdev *led_cdev)
{
struct powernv_led_data *powernv_led =
container_of(led_cdev, struct powernv_led_data, cdev);
return powernv_led_get(powernv_led);
}
/*
* This function registers classdev structure for any given type of LED on
* a given child LED device node.
*/
static int powernv_led_create(struct device *dev,
struct powernv_led_data *powernv_led,
const char *led_type_desc)
{
int rc;
/* Make sure LED type is supported */
powernv_led->led_type = powernv_get_led_type(led_type_desc);
if (powernv_led->led_type == -1) {
dev_warn(dev, "%s: No support for led type : %s\n",
__func__, led_type_desc);
return -EINVAL;
}
/* Create the name for classdev */
powernv_led->cdev.name = devm_kasprintf(dev, GFP_KERNEL, "%s:%s",
powernv_led->loc_code,
led_type_desc);
if (!powernv_led->cdev.name)
return -ENOMEM;
powernv_led->cdev.brightness_set_blocking = powernv_brightness_set;
powernv_led->cdev.brightness_get = powernv_brightness_get;
powernv_led->cdev.brightness = LED_OFF;
powernv_led->cdev.max_brightness = LED_FULL;
/* Register the classdev */
rc = devm_led_classdev_register(dev, &powernv_led->cdev);
if (rc) {
dev_err(dev, "%s: Classdev registration failed for %s\n",
__func__, powernv_led->cdev.name);
}
return rc;
}
/* Go through LED device tree node and register LED classdev structure */
static int powernv_led_classdev(struct platform_device *pdev,
struct device_node *led_node,
struct powernv_led_common *powernv_led_common)
{
const char *cur = NULL;
int rc = -1;
struct property *p;
struct device_node *np;
struct powernv_led_data *powernv_led;
struct device *dev = &pdev->dev;
for_each_available_child_of_node(led_node, np) {
p = of_find_property(np, "led-types", NULL);
while ((cur = of_prop_next_string(p, cur)) != NULL) {
powernv_led = devm_kzalloc(dev, sizeof(*powernv_led),
GFP_KERNEL);
if (!powernv_led) {
of_node_put(np);
return -ENOMEM;
}
powernv_led->common = powernv_led_common;
powernv_led->loc_code = (char *)np->name;
rc = powernv_led_create(dev, powernv_led, cur);
if (rc) {
of_node_put(np);
return rc;
}
} /* while end */
}
return rc;
}
/* Platform driver probe */
static int powernv_led_probe(struct platform_device *pdev)
{
struct device_node *led_node;
struct powernv_led_common *powernv_led_common;
struct device *dev = &pdev->dev;
int rc;
led_node = of_find_node_by_path("/ibm,opal/leds");
if (!led_node) {
dev_err(dev, "%s: LED parent device node not found\n",
__func__);
return -EINVAL;
}
powernv_led_common = devm_kzalloc(dev, sizeof(*powernv_led_common),
GFP_KERNEL);
if (!powernv_led_common) {
rc = -ENOMEM;
goto out;
}
mutex_init(&powernv_led_common->lock);
powernv_led_common->max_led_type = cpu_to_be64(OPAL_SLOT_LED_TYPE_MAX);
platform_set_drvdata(pdev, powernv_led_common);
rc = powernv_led_classdev(pdev, led_node, powernv_led_common);
out:
of_node_put(led_node);
return rc;
}
/* Platform driver remove */
static int powernv_led_remove(struct platform_device *pdev)
{
struct powernv_led_common *powernv_led_common;
/* Disable LED operation */
powernv_led_common = platform_get_drvdata(pdev);
powernv_led_common->led_disabled = true;
/* Destroy lock */
mutex_destroy(&powernv_led_common->lock);
dev_info(&pdev->dev, "PowerNV led module unregistered\n");
return 0;
}
/* Platform driver property match */
static const struct of_device_id powernv_led_match[] = {
{
.compatible = "ibm,opal-v3-led",
},
{},
};
MODULE_DEVICE_TABLE(of, powernv_led_match);
static struct platform_driver powernv_led_driver = {
.probe = powernv_led_probe,
.remove = powernv_led_remove,
.driver = {
.name = "powernv-led-driver",
.of_match_table = powernv_led_match,
},
};
module_platform_driver(powernv_led_driver);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("PowerNV LED driver");
MODULE_AUTHOR("Vasant Hegde <[email protected]>");
| linux-master | drivers/leds/leds-powernv.c |
// SPDX-License-Identifier: GPL-2.0
// Copyright 2015 Texas Instruments
// Copyright 2018 Sebastian Reichel
// Copyright 2018 Pavel Machek <[email protected]>
// TI LMU LED common framework, based on previous work from
// Milo Kim <[email protected]>
#include <linux/bitops.h>
#include <linux/err.h>
#include <linux/property.h>
#include <linux/leds-ti-lmu-common.h>
static const unsigned int ramp_table[16] = {2048, 262000, 524000, 1049000,
2090000, 4194000, 8389000, 16780000, 33550000,
41940000, 50330000, 58720000, 67110000,
83880000, 100660000, 117440000};
static int ti_lmu_common_update_brightness(struct ti_lmu_bank *lmu_bank,
int brightness)
{
struct regmap *regmap = lmu_bank->regmap;
u8 reg, val;
int ret;
/*
* Brightness register update
*
* 11 bit dimming: update LSB bits and write MSB byte.
* MSB brightness should be shifted.
* 8 bit dimming: write MSB byte.
*/
if (lmu_bank->max_brightness == MAX_BRIGHTNESS_11BIT) {
reg = lmu_bank->lsb_brightness_reg;
ret = regmap_update_bits(regmap, reg,
LMU_11BIT_LSB_MASK,
brightness);
if (ret)
return ret;
val = brightness >> LMU_11BIT_MSB_SHIFT;
} else {
val = brightness;
}
reg = lmu_bank->msb_brightness_reg;
return regmap_write(regmap, reg, val);
}
int ti_lmu_common_set_brightness(struct ti_lmu_bank *lmu_bank, int brightness)
{
return ti_lmu_common_update_brightness(lmu_bank, brightness);
}
EXPORT_SYMBOL(ti_lmu_common_set_brightness);
static unsigned int ti_lmu_common_convert_ramp_to_index(unsigned int usec)
{
int size = ARRAY_SIZE(ramp_table);
int i;
if (usec <= ramp_table[0])
return 0;
if (usec > ramp_table[size - 1])
return size - 1;
for (i = 1; i < size; i++) {
if (usec == ramp_table[i])
return i;
/* Find an approximate index by looking up the table */
if (usec > ramp_table[i - 1] && usec < ramp_table[i]) {
if (usec - ramp_table[i - 1] < ramp_table[i] - usec)
return i - 1;
else
return i;
}
}
return 0;
}
int ti_lmu_common_set_ramp(struct ti_lmu_bank *lmu_bank)
{
struct regmap *regmap = lmu_bank->regmap;
u8 ramp, ramp_up, ramp_down;
if (lmu_bank->ramp_up_usec == 0 && lmu_bank->ramp_down_usec == 0) {
ramp_up = 0;
ramp_down = 0;
} else {
ramp_up = ti_lmu_common_convert_ramp_to_index(lmu_bank->ramp_up_usec);
ramp_down = ti_lmu_common_convert_ramp_to_index(lmu_bank->ramp_down_usec);
}
ramp = (ramp_up << 4) | ramp_down;
return regmap_write(regmap, lmu_bank->runtime_ramp_reg, ramp);
}
EXPORT_SYMBOL(ti_lmu_common_set_ramp);
int ti_lmu_common_get_ramp_params(struct device *dev,
struct fwnode_handle *child,
struct ti_lmu_bank *lmu_data)
{
int ret;
ret = fwnode_property_read_u32(child, "ramp-up-us",
&lmu_data->ramp_up_usec);
if (ret)
dev_warn(dev, "ramp-up-us property missing\n");
ret = fwnode_property_read_u32(child, "ramp-down-us",
&lmu_data->ramp_down_usec);
if (ret)
dev_warn(dev, "ramp-down-us property missing\n");
return 0;
}
EXPORT_SYMBOL(ti_lmu_common_get_ramp_params);
int ti_lmu_common_get_brt_res(struct device *dev, struct fwnode_handle *child,
struct ti_lmu_bank *lmu_data)
{
int ret;
ret = device_property_read_u32(dev, "ti,brightness-resolution",
&lmu_data->max_brightness);
if (ret)
ret = fwnode_property_read_u32(child,
"ti,brightness-resolution",
&lmu_data->max_brightness);
if (lmu_data->max_brightness <= 0) {
lmu_data->max_brightness = MAX_BRIGHTNESS_8BIT;
return ret;
}
if (lmu_data->max_brightness > MAX_BRIGHTNESS_11BIT)
lmu_data->max_brightness = MAX_BRIGHTNESS_11BIT;
return 0;
}
EXPORT_SYMBOL(ti_lmu_common_get_brt_res);
MODULE_DESCRIPTION("TI LMU common LED framework");
MODULE_AUTHOR("Sebastian Reichel");
MODULE_AUTHOR("Dan Murphy <[email protected]>");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("ti-lmu-led-common");
| linux-master | drivers/leds/leds-ti-lmu-common.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2023 Andreas Kemnade
*
* Datasheet:
* https://fscdn.rohm.com/en/products/databook/datasheet/ic/power/led_driver/bd2606mvv_1-e.pdf
*
* If LED brightness cannot be controlled independently due to shared
* brightness registers, max_brightness is set to 1 and only on/off
* is possible for the affected LED pair.
*/
#include <linux/i2c.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/property.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#define BD2606_MAX_LEDS 6
#define BD2606_MAX_BRIGHTNESS 63
#define BD2606_REG_PWRCNT 3
#define ldev_to_led(c) container_of(c, struct bd2606mvv_led, ldev)
struct bd2606mvv_led {
unsigned int led_no;
struct led_classdev ldev;
struct bd2606mvv_priv *priv;
};
struct bd2606mvv_priv {
struct bd2606mvv_led leds[BD2606_MAX_LEDS];
struct regmap *regmap;
};
static int
bd2606mvv_brightness_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
struct bd2606mvv_led *led = ldev_to_led(led_cdev);
struct bd2606mvv_priv *priv = led->priv;
int err;
if (brightness == 0)
return regmap_update_bits(priv->regmap,
BD2606_REG_PWRCNT,
1 << led->led_no,
0);
/* shared brightness register */
err = regmap_write(priv->regmap, led->led_no / 2,
led_cdev->max_brightness == 1 ?
BD2606_MAX_BRIGHTNESS : brightness);
if (err)
return err;
return regmap_update_bits(priv->regmap,
BD2606_REG_PWRCNT,
1 << led->led_no,
1 << led->led_no);
}
static const struct regmap_config bd2606mvv_regmap = {
.reg_bits = 8,
.val_bits = 8,
.max_register = 0x3,
};
static int bd2606mvv_probe(struct i2c_client *client)
{
struct fwnode_handle *np, *child;
struct device *dev = &client->dev;
struct bd2606mvv_priv *priv;
struct fwnode_handle *led_fwnodes[BD2606_MAX_LEDS] = { 0 };
int active_pairs[BD2606_MAX_LEDS / 2] = { 0 };
int err, reg;
int i;
np = dev_fwnode(dev);
if (!np)
return -ENODEV;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->regmap = devm_regmap_init_i2c(client, &bd2606mvv_regmap);
if (IS_ERR(priv->regmap)) {
err = PTR_ERR(priv->regmap);
dev_err(dev, "Failed to allocate register map: %d\n", err);
return err;
}
i2c_set_clientdata(client, priv);
fwnode_for_each_available_child_node(np, child) {
struct bd2606mvv_led *led;
err = fwnode_property_read_u32(child, "reg", ®);
if (err) {
fwnode_handle_put(child);
return err;
}
if (reg < 0 || reg >= BD2606_MAX_LEDS || led_fwnodes[reg]) {
fwnode_handle_put(child);
return -EINVAL;
}
led = &priv->leds[reg];
led_fwnodes[reg] = child;
active_pairs[reg / 2]++;
led->priv = priv;
led->led_no = reg;
led->ldev.brightness_set_blocking = bd2606mvv_brightness_set;
led->ldev.max_brightness = BD2606_MAX_BRIGHTNESS;
}
for (i = 0; i < BD2606_MAX_LEDS; i++) {
struct led_init_data init_data = {};
if (!led_fwnodes[i])
continue;
init_data.fwnode = led_fwnodes[i];
/* Check whether brightness can be independently adjusted. */
if (active_pairs[i / 2] == 2)
priv->leds[i].ldev.max_brightness = 1;
err = devm_led_classdev_register_ext(dev,
&priv->leds[i].ldev,
&init_data);
if (err < 0) {
fwnode_handle_put(child);
return dev_err_probe(dev, err,
"couldn't register LED %s\n",
priv->leds[i].ldev.name);
}
}
return 0;
}
static const struct of_device_id __maybe_unused of_bd2606mvv_leds_match[] = {
{ .compatible = "rohm,bd2606mvv", },
{},
};
MODULE_DEVICE_TABLE(of, of_bd2606mvv_leds_match);
static struct i2c_driver bd2606mvv_driver = {
.driver = {
.name = "leds-bd2606mvv",
.of_match_table = of_match_ptr(of_bd2606mvv_leds_match),
},
.probe = bd2606mvv_probe,
};
module_i2c_driver(bd2606mvv_driver);
MODULE_AUTHOR("Andreas Kemnade <[email protected]>");
MODULE_DESCRIPTION("BD2606 LED driver");
MODULE_LICENSE("GPL");
| linux-master | drivers/leds/leds-bd2606mvv.c |
// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2019 Crane Merchandising Systems. All rights reserved.
// Copyright (C) 2019 Oleh Kravchenko <[email protected]>
#include <linux/delay.h>
#include <linux/leds.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/property.h>
#include <linux/spi/spi.h>
/*
* EL15203000 SPI protocol description:
* +-----+---------+
* | LED | COMMAND |
* +-----+---------+
* | 1 | 1 |
* +-----+---------+
* (*) LEDs MCU board expects 20 msec delay per byte.
*
* LEDs:
* +----------+--------------+-------------------------------------------+
* | ID | NAME | DESCRIPTION |
* +----------+--------------+-------------------------------------------+
* | 'P' 0x50 | Pipe | Consists from 5 LEDs, controlled by board |
* +----------+--------------+-------------------------------------------+
* | 'S' 0x53 | Screen frame | Light tube around the screen |
* +----------+--------------+-------------------------------------------+
* | 'V' 0x56 | Vending area | Highlights a cup of coffee |
* +----------+--------------+-------------------------------------------+
*
* COMMAND:
* +----------+-----------------+--------------+--------------+
* | VALUES | PIPE | SCREEN FRAME | VENDING AREA |
* +----------+-----------------+--------------+--------------+
* | '0' 0x30 | Off |
* +----------+-----------------------------------------------+
* | '1' 0x31 | On |
* +----------+-----------------+--------------+--------------+
* | '2' 0x32 | Cascade | Breathing |
* +----------+-----------------+--------------+
* | '3' 0x33 | Inverse cascade |
* +----------+-----------------+
* | '4' 0x34 | Bounce |
* +----------+-----------------+
* | '5' 0x35 | Inverse bounce |
* +----------+-----------------+
*/
/* EL15203000 default settings */
#define EL_FW_DELAY_USEC 20000ul
#define EL_PATTERN_DELAY_MSEC 800u
#define EL_PATTERN_LEN 10u
#define EL_PATTERN_HALF_LEN (EL_PATTERN_LEN / 2)
enum el15203000_command {
/* for all LEDs */
EL_OFF = '0',
EL_ON = '1',
/* for Screen LED */
EL_SCREEN_BREATHING = '2',
/* for Pipe LED */
EL_PIPE_CASCADE = '2',
EL_PIPE_INV_CASCADE = '3',
EL_PIPE_BOUNCE = '4',
EL_PIPE_INV_BOUNCE = '5',
};
struct el15203000_led {
struct led_classdev ldev;
struct el15203000 *priv;
u32 reg;
};
struct el15203000 {
struct device *dev;
struct mutex lock;
struct spi_device *spi;
unsigned long delay;
size_t count;
struct el15203000_led leds[];
};
#define to_el15203000_led(d) container_of(d, struct el15203000_led, ldev)
static int el15203000_cmd(struct el15203000_led *led, u8 brightness)
{
int ret;
u8 cmd[2];
size_t i;
mutex_lock(&led->priv->lock);
dev_dbg(led->priv->dev, "Set brightness of 0x%02x(%c) to 0x%02x(%c)",
led->reg, led->reg, brightness, brightness);
/* to avoid SPI mistiming with firmware we should wait some time */
if (time_after(led->priv->delay, jiffies)) {
dev_dbg(led->priv->dev, "Wait %luus to sync",
EL_FW_DELAY_USEC);
usleep_range(EL_FW_DELAY_USEC,
EL_FW_DELAY_USEC + 1);
}
cmd[0] = led->reg;
cmd[1] = brightness;
for (i = 0; i < ARRAY_SIZE(cmd); i++) {
if (i)
usleep_range(EL_FW_DELAY_USEC,
EL_FW_DELAY_USEC + 1);
ret = spi_write(led->priv->spi, &cmd[i], sizeof(cmd[i]));
if (ret) {
dev_err(led->priv->dev,
"spi_write() error %d", ret);
break;
}
}
led->priv->delay = jiffies + usecs_to_jiffies(EL_FW_DELAY_USEC);
mutex_unlock(&led->priv->lock);
return ret;
}
static int el15203000_set_blocking(struct led_classdev *ldev,
enum led_brightness brightness)
{
struct el15203000_led *led = to_el15203000_led(ldev);
return el15203000_cmd(led, brightness == LED_OFF ? EL_OFF : EL_ON);
}
static int el15203000_pattern_set_S(struct led_classdev *ldev,
struct led_pattern *pattern,
u32 len, int repeat)
{
struct el15203000_led *led = to_el15203000_led(ldev);
if (repeat > 0 || len != 2 ||
pattern[0].delta_t != 4000 || pattern[0].brightness != 0 ||
pattern[1].delta_t != 4000 || pattern[1].brightness != 1)
return -EINVAL;
dev_dbg(led->priv->dev, "Breathing mode for 0x%02x(%c)",
led->reg, led->reg);
return el15203000_cmd(led, EL_SCREEN_BREATHING);
}
static bool is_cascade(const struct led_pattern *pattern, u32 len,
bool inv, bool right)
{
int val, t;
u32 i;
if (len != EL_PATTERN_HALF_LEN)
return false;
val = right ? BIT(4) : BIT(0);
for (i = 0; i < len; i++) {
t = inv ? ~val & GENMASK(4, 0) : val;
if (pattern[i].delta_t != EL_PATTERN_DELAY_MSEC ||
pattern[i].brightness != t)
return false;
val = right ? val >> 1 : val << 1;
}
return true;
}
static bool is_bounce(const struct led_pattern *pattern, u32 len, bool inv)
{
if (len != EL_PATTERN_LEN)
return false;
return is_cascade(pattern, EL_PATTERN_HALF_LEN, inv, false) &&
is_cascade(pattern + EL_PATTERN_HALF_LEN,
EL_PATTERN_HALF_LEN, inv, true);
}
static int el15203000_pattern_set_P(struct led_classdev *ldev,
struct led_pattern *pattern,
u32 len, int repeat)
{
struct el15203000_led *led = to_el15203000_led(ldev);
u8 cmd;
if (repeat > 0)
return -EINVAL;
if (is_cascade(pattern, len, false, false)) {
dev_dbg(led->priv->dev, "Cascade mode for 0x%02x(%c)",
led->reg, led->reg);
cmd = EL_PIPE_CASCADE;
} else if (is_cascade(pattern, len, true, false)) {
dev_dbg(led->priv->dev, "Inverse cascade mode for 0x%02x(%c)",
led->reg, led->reg);
cmd = EL_PIPE_INV_CASCADE;
} else if (is_bounce(pattern, len, false)) {
dev_dbg(led->priv->dev, "Bounce mode for 0x%02x(%c)",
led->reg, led->reg);
cmd = EL_PIPE_BOUNCE;
} else if (is_bounce(pattern, len, true)) {
dev_dbg(led->priv->dev, "Inverse bounce mode for 0x%02x(%c)",
led->reg, led->reg);
cmd = EL_PIPE_INV_BOUNCE;
} else {
dev_err(led->priv->dev, "Invalid hw_pattern for 0x%02x(%c)!",
led->reg, led->reg);
return -EINVAL;
}
return el15203000_cmd(led, cmd);
}
static int el15203000_pattern_clear(struct led_classdev *ldev)
{
struct el15203000_led *led = to_el15203000_led(ldev);
return el15203000_cmd(led, EL_OFF);
}
static int el15203000_probe_dt(struct el15203000 *priv)
{
struct el15203000_led *led = priv->leds;
struct fwnode_handle *child;
int ret;
device_for_each_child_node(priv->dev, child) {
struct led_init_data init_data = {};
ret = fwnode_property_read_u32(child, "reg", &led->reg);
if (ret) {
dev_err(priv->dev, "LED without ID number");
goto err_child_out;
}
if (led->reg > U8_MAX) {
dev_err(priv->dev, "LED value %d is invalid", led->reg);
ret = -EINVAL;
goto err_child_out;
}
led->priv = priv;
led->ldev.max_brightness = LED_ON;
led->ldev.brightness_set_blocking = el15203000_set_blocking;
if (led->reg == 'S') {
led->ldev.pattern_set = el15203000_pattern_set_S;
led->ldev.pattern_clear = el15203000_pattern_clear;
} else if (led->reg == 'P') {
led->ldev.pattern_set = el15203000_pattern_set_P;
led->ldev.pattern_clear = el15203000_pattern_clear;
}
init_data.fwnode = child;
ret = devm_led_classdev_register_ext(priv->dev, &led->ldev,
&init_data);
if (ret) {
dev_err(priv->dev,
"failed to register LED device %s, err %d",
led->ldev.name, ret);
goto err_child_out;
}
led++;
}
return 0;
err_child_out:
fwnode_handle_put(child);
return ret;
}
static int el15203000_probe(struct spi_device *spi)
{
struct el15203000 *priv;
size_t count;
count = device_get_child_node_count(&spi->dev);
if (!count) {
dev_err(&spi->dev, "LEDs are not defined in device tree!");
return -ENODEV;
}
priv = devm_kzalloc(&spi->dev, struct_size(priv, leds, count),
GFP_KERNEL);
if (!priv)
return -ENOMEM;
mutex_init(&priv->lock);
priv->count = count;
priv->dev = &spi->dev;
priv->spi = spi;
priv->delay = jiffies -
usecs_to_jiffies(EL_FW_DELAY_USEC);
spi_set_drvdata(spi, priv);
return el15203000_probe_dt(priv);
}
static void el15203000_remove(struct spi_device *spi)
{
struct el15203000 *priv = spi_get_drvdata(spi);
mutex_destroy(&priv->lock);
}
static const struct of_device_id el15203000_dt_ids[] = {
{ .compatible = "crane,el15203000", },
{},
};
MODULE_DEVICE_TABLE(of, el15203000_dt_ids);
static struct spi_driver el15203000_driver = {
.probe = el15203000_probe,
.remove = el15203000_remove,
.driver = {
.name = KBUILD_MODNAME,
.of_match_table = el15203000_dt_ids,
},
};
module_spi_driver(el15203000_driver);
MODULE_AUTHOR("Oleh Kravchenko <[email protected]>");
MODULE_DESCRIPTION("el15203000 LED driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("spi:el15203000");
| linux-master | drivers/leds/leds-el15203000.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* LP5562 LED driver
*
* Copyright (C) 2013 Texas Instruments
*
* Author: Milo(Woogyom) Kim <[email protected]>
*/
#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/i2c.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/platform_data/leds-lp55xx.h>
#include <linux/slab.h>
#include "leds-lp55xx-common.h"
#define LP5562_PROGRAM_LENGTH 32
#define LP5562_MAX_LEDS 4
/* ENABLE Register 00h */
#define LP5562_REG_ENABLE 0x00
#define LP5562_EXEC_ENG1_M 0x30
#define LP5562_EXEC_ENG2_M 0x0C
#define LP5562_EXEC_ENG3_M 0x03
#define LP5562_EXEC_M 0x3F
#define LP5562_MASTER_ENABLE 0x40 /* Chip master enable */
#define LP5562_LOGARITHMIC_PWM 0x80 /* Logarithmic PWM adjustment */
#define LP5562_EXEC_RUN 0x2A
#define LP5562_ENABLE_DEFAULT \
(LP5562_MASTER_ENABLE | LP5562_LOGARITHMIC_PWM)
#define LP5562_ENABLE_RUN_PROGRAM \
(LP5562_ENABLE_DEFAULT | LP5562_EXEC_RUN)
/* OPMODE Register 01h */
#define LP5562_REG_OP_MODE 0x01
#define LP5562_MODE_ENG1_M 0x30
#define LP5562_MODE_ENG2_M 0x0C
#define LP5562_MODE_ENG3_M 0x03
#define LP5562_LOAD_ENG1 0x10
#define LP5562_LOAD_ENG2 0x04
#define LP5562_LOAD_ENG3 0x01
#define LP5562_RUN_ENG1 0x20
#define LP5562_RUN_ENG2 0x08
#define LP5562_RUN_ENG3 0x02
#define LP5562_ENG1_IS_LOADING(mode) \
((mode & LP5562_MODE_ENG1_M) == LP5562_LOAD_ENG1)
#define LP5562_ENG2_IS_LOADING(mode) \
((mode & LP5562_MODE_ENG2_M) == LP5562_LOAD_ENG2)
#define LP5562_ENG3_IS_LOADING(mode) \
((mode & LP5562_MODE_ENG3_M) == LP5562_LOAD_ENG3)
/* BRIGHTNESS Registers */
#define LP5562_REG_R_PWM 0x04
#define LP5562_REG_G_PWM 0x03
#define LP5562_REG_B_PWM 0x02
#define LP5562_REG_W_PWM 0x0E
/* CURRENT Registers */
#define LP5562_REG_R_CURRENT 0x07
#define LP5562_REG_G_CURRENT 0x06
#define LP5562_REG_B_CURRENT 0x05
#define LP5562_REG_W_CURRENT 0x0F
/* CONFIG Register 08h */
#define LP5562_REG_CONFIG 0x08
#define LP5562_PWM_HF 0x40
#define LP5562_PWRSAVE_EN 0x20
#define LP5562_CLK_INT 0x01 /* Internal clock */
#define LP5562_DEFAULT_CFG (LP5562_PWM_HF | LP5562_PWRSAVE_EN)
/* RESET Register 0Dh */
#define LP5562_REG_RESET 0x0D
#define LP5562_RESET 0xFF
/* PROGRAM ENGINE Registers */
#define LP5562_REG_PROG_MEM_ENG1 0x10
#define LP5562_REG_PROG_MEM_ENG2 0x30
#define LP5562_REG_PROG_MEM_ENG3 0x50
/* LEDMAP Register 70h */
#define LP5562_REG_ENG_SEL 0x70
#define LP5562_ENG_SEL_PWM 0
#define LP5562_ENG_FOR_RGB_M 0x3F
#define LP5562_ENG_SEL_RGB 0x1B /* R:ENG1, G:ENG2, B:ENG3 */
#define LP5562_ENG_FOR_W_M 0xC0
#define LP5562_ENG1_FOR_W 0x40 /* W:ENG1 */
#define LP5562_ENG2_FOR_W 0x80 /* W:ENG2 */
#define LP5562_ENG3_FOR_W 0xC0 /* W:ENG3 */
/* Program Commands */
#define LP5562_CMD_DISABLE 0x00
#define LP5562_CMD_LOAD 0x15
#define LP5562_CMD_RUN 0x2A
#define LP5562_CMD_DIRECT 0x3F
#define LP5562_PATTERN_OFF 0
static inline void lp5562_wait_opmode_done(void)
{
/* operation mode change needs to be longer than 153 us */
usleep_range(200, 300);
}
static inline void lp5562_wait_enable_done(void)
{
/* it takes more 488 us to update ENABLE register */
usleep_range(500, 600);
}
static void lp5562_set_led_current(struct lp55xx_led *led, u8 led_current)
{
static const u8 addr[] = {
LP5562_REG_R_CURRENT,
LP5562_REG_G_CURRENT,
LP5562_REG_B_CURRENT,
LP5562_REG_W_CURRENT,
};
led->led_current = led_current;
lp55xx_write(led->chip, addr[led->chan_nr], led_current);
}
static void lp5562_load_engine(struct lp55xx_chip *chip)
{
enum lp55xx_engine_index idx = chip->engine_idx;
static const u8 mask[] = {
[LP55XX_ENGINE_1] = LP5562_MODE_ENG1_M,
[LP55XX_ENGINE_2] = LP5562_MODE_ENG2_M,
[LP55XX_ENGINE_3] = LP5562_MODE_ENG3_M,
};
static const u8 val[] = {
[LP55XX_ENGINE_1] = LP5562_LOAD_ENG1,
[LP55XX_ENGINE_2] = LP5562_LOAD_ENG2,
[LP55XX_ENGINE_3] = LP5562_LOAD_ENG3,
};
lp55xx_update_bits(chip, LP5562_REG_OP_MODE, mask[idx], val[idx]);
lp5562_wait_opmode_done();
}
static void lp5562_stop_engine(struct lp55xx_chip *chip)
{
lp55xx_write(chip, LP5562_REG_OP_MODE, LP5562_CMD_DISABLE);
lp5562_wait_opmode_done();
}
static void lp5562_run_engine(struct lp55xx_chip *chip, bool start)
{
int ret;
u8 mode;
u8 exec;
/* stop engine */
if (!start) {
lp55xx_write(chip, LP5562_REG_ENABLE, LP5562_ENABLE_DEFAULT);
lp5562_wait_enable_done();
lp5562_stop_engine(chip);
lp55xx_write(chip, LP5562_REG_ENG_SEL, LP5562_ENG_SEL_PWM);
lp55xx_write(chip, LP5562_REG_OP_MODE, LP5562_CMD_DIRECT);
lp5562_wait_opmode_done();
return;
}
/*
* To run the engine,
* operation mode and enable register should updated at the same time
*/
ret = lp55xx_read(chip, LP5562_REG_OP_MODE, &mode);
if (ret)
return;
ret = lp55xx_read(chip, LP5562_REG_ENABLE, &exec);
if (ret)
return;
/* change operation mode to RUN only when each engine is loading */
if (LP5562_ENG1_IS_LOADING(mode)) {
mode = (mode & ~LP5562_MODE_ENG1_M) | LP5562_RUN_ENG1;
exec = (exec & ~LP5562_EXEC_ENG1_M) | LP5562_RUN_ENG1;
}
if (LP5562_ENG2_IS_LOADING(mode)) {
mode = (mode & ~LP5562_MODE_ENG2_M) | LP5562_RUN_ENG2;
exec = (exec & ~LP5562_EXEC_ENG2_M) | LP5562_RUN_ENG2;
}
if (LP5562_ENG3_IS_LOADING(mode)) {
mode = (mode & ~LP5562_MODE_ENG3_M) | LP5562_RUN_ENG3;
exec = (exec & ~LP5562_EXEC_ENG3_M) | LP5562_RUN_ENG3;
}
lp55xx_write(chip, LP5562_REG_OP_MODE, mode);
lp5562_wait_opmode_done();
lp55xx_update_bits(chip, LP5562_REG_ENABLE, LP5562_EXEC_M, exec);
lp5562_wait_enable_done();
}
static int lp5562_update_firmware(struct lp55xx_chip *chip,
const u8 *data, size_t size)
{
enum lp55xx_engine_index idx = chip->engine_idx;
u8 pattern[LP5562_PROGRAM_LENGTH] = {0};
static const u8 addr[] = {
[LP55XX_ENGINE_1] = LP5562_REG_PROG_MEM_ENG1,
[LP55XX_ENGINE_2] = LP5562_REG_PROG_MEM_ENG2,
[LP55XX_ENGINE_3] = LP5562_REG_PROG_MEM_ENG3,
};
unsigned cmd;
char c[3];
int program_size;
int nrchars;
int offset = 0;
int ret;
int i;
/* clear program memory before updating */
for (i = 0; i < LP5562_PROGRAM_LENGTH; i++)
lp55xx_write(chip, addr[idx] + i, 0);
i = 0;
while ((offset < size - 1) && (i < LP5562_PROGRAM_LENGTH)) {
/* separate sscanfs because length is working only for %s */
ret = sscanf(data + offset, "%2s%n ", c, &nrchars);
if (ret != 1)
goto err;
ret = sscanf(c, "%2x", &cmd);
if (ret != 1)
goto err;
pattern[i] = (u8)cmd;
offset += nrchars;
i++;
}
/* Each instruction is 16bit long. Check that length is even */
if (i % 2)
goto err;
program_size = i;
for (i = 0; i < program_size; i++)
lp55xx_write(chip, addr[idx] + i, pattern[i]);
return 0;
err:
dev_err(&chip->cl->dev, "wrong pattern format\n");
return -EINVAL;
}
static void lp5562_firmware_loaded(struct lp55xx_chip *chip)
{
const struct firmware *fw = chip->fw;
/*
* the firmware is encoded in ascii hex character, with 2 chars
* per byte
*/
if (fw->size > (LP5562_PROGRAM_LENGTH * 2)) {
dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n",
fw->size);
return;
}
/*
* Program memory sequence
* 1) set engine mode to "LOAD"
* 2) write firmware data into program memory
*/
lp5562_load_engine(chip);
lp5562_update_firmware(chip, fw->data, fw->size);
}
static int lp5562_post_init_device(struct lp55xx_chip *chip)
{
int ret;
u8 cfg = LP5562_DEFAULT_CFG;
/* Set all PWMs to direct control mode */
ret = lp55xx_write(chip, LP5562_REG_OP_MODE, LP5562_CMD_DIRECT);
if (ret)
return ret;
lp5562_wait_opmode_done();
/* Update configuration for the clock setting */
if (!lp55xx_is_extclk_used(chip))
cfg |= LP5562_CLK_INT;
ret = lp55xx_write(chip, LP5562_REG_CONFIG, cfg);
if (ret)
return ret;
/* Initialize all channels PWM to zero -> leds off */
lp55xx_write(chip, LP5562_REG_R_PWM, 0);
lp55xx_write(chip, LP5562_REG_G_PWM, 0);
lp55xx_write(chip, LP5562_REG_B_PWM, 0);
lp55xx_write(chip, LP5562_REG_W_PWM, 0);
/* Set LED map as register PWM by default */
lp55xx_write(chip, LP5562_REG_ENG_SEL, LP5562_ENG_SEL_PWM);
return 0;
}
static int lp5562_led_brightness(struct lp55xx_led *led)
{
struct lp55xx_chip *chip = led->chip;
static const u8 addr[] = {
LP5562_REG_R_PWM,
LP5562_REG_G_PWM,
LP5562_REG_B_PWM,
LP5562_REG_W_PWM,
};
int ret;
mutex_lock(&chip->lock);
ret = lp55xx_write(chip, addr[led->chan_nr], led->brightness);
mutex_unlock(&chip->lock);
return ret;
}
static void lp5562_write_program_memory(struct lp55xx_chip *chip,
u8 base, const u8 *rgb, int size)
{
int i;
if (!rgb || size <= 0)
return;
for (i = 0; i < size; i++)
lp55xx_write(chip, base + i, *(rgb + i));
lp55xx_write(chip, base + i, 0);
lp55xx_write(chip, base + i + 1, 0);
}
/* check the size of program count */
static inline bool _is_pc_overflow(struct lp55xx_predef_pattern *ptn)
{
return ptn->size_r >= LP5562_PROGRAM_LENGTH ||
ptn->size_g >= LP5562_PROGRAM_LENGTH ||
ptn->size_b >= LP5562_PROGRAM_LENGTH;
}
static int lp5562_run_predef_led_pattern(struct lp55xx_chip *chip, int mode)
{
struct lp55xx_predef_pattern *ptn;
int i;
if (mode == LP5562_PATTERN_OFF) {
lp5562_run_engine(chip, false);
return 0;
}
ptn = chip->pdata->patterns + (mode - 1);
if (!ptn || _is_pc_overflow(ptn)) {
dev_err(&chip->cl->dev, "invalid pattern data\n");
return -EINVAL;
}
lp5562_stop_engine(chip);
/* Set LED map as RGB */
lp55xx_write(chip, LP5562_REG_ENG_SEL, LP5562_ENG_SEL_RGB);
/* Load engines */
for (i = LP55XX_ENGINE_1; i <= LP55XX_ENGINE_3; i++) {
chip->engine_idx = i;
lp5562_load_engine(chip);
}
/* Clear program registers */
lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG1, 0);
lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG1 + 1, 0);
lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG2, 0);
lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG2 + 1, 0);
lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG3, 0);
lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG3 + 1, 0);
/* Program engines */
lp5562_write_program_memory(chip, LP5562_REG_PROG_MEM_ENG1,
ptn->r, ptn->size_r);
lp5562_write_program_memory(chip, LP5562_REG_PROG_MEM_ENG2,
ptn->g, ptn->size_g);
lp5562_write_program_memory(chip, LP5562_REG_PROG_MEM_ENG3,
ptn->b, ptn->size_b);
/* Run engines */
lp5562_run_engine(chip, true);
return 0;
}
static ssize_t lp5562_store_pattern(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t len)
{
struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
struct lp55xx_chip *chip = led->chip;
struct lp55xx_predef_pattern *ptn = chip->pdata->patterns;
int num_patterns = chip->pdata->num_patterns;
unsigned long mode;
int ret;
ret = kstrtoul(buf, 0, &mode);
if (ret)
return ret;
if (mode > num_patterns || !ptn)
return -EINVAL;
mutex_lock(&chip->lock);
ret = lp5562_run_predef_led_pattern(chip, mode);
mutex_unlock(&chip->lock);
if (ret)
return ret;
return len;
}
static ssize_t lp5562_store_engine_mux(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t len)
{
struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
struct lp55xx_chip *chip = led->chip;
u8 mask;
u8 val;
/* LED map
* R ... Engine 1 (fixed)
* G ... Engine 2 (fixed)
* B ... Engine 3 (fixed)
* W ... Engine 1 or 2 or 3
*/
if (sysfs_streq(buf, "RGB")) {
mask = LP5562_ENG_FOR_RGB_M;
val = LP5562_ENG_SEL_RGB;
} else if (sysfs_streq(buf, "W")) {
enum lp55xx_engine_index idx = chip->engine_idx;
mask = LP5562_ENG_FOR_W_M;
switch (idx) {
case LP55XX_ENGINE_1:
val = LP5562_ENG1_FOR_W;
break;
case LP55XX_ENGINE_2:
val = LP5562_ENG2_FOR_W;
break;
case LP55XX_ENGINE_3:
val = LP5562_ENG3_FOR_W;
break;
default:
return -EINVAL;
}
} else {
dev_err(dev, "choose RGB or W\n");
return -EINVAL;
}
mutex_lock(&chip->lock);
lp55xx_update_bits(chip, LP5562_REG_ENG_SEL, mask, val);
mutex_unlock(&chip->lock);
return len;
}
static LP55XX_DEV_ATTR_WO(led_pattern, lp5562_store_pattern);
static LP55XX_DEV_ATTR_WO(engine_mux, lp5562_store_engine_mux);
static struct attribute *lp5562_attributes[] = {
&dev_attr_led_pattern.attr,
&dev_attr_engine_mux.attr,
NULL,
};
static const struct attribute_group lp5562_group = {
.attrs = lp5562_attributes,
};
/* Chip specific configurations */
static struct lp55xx_device_config lp5562_cfg = {
.max_channel = LP5562_MAX_LEDS,
.reset = {
.addr = LP5562_REG_RESET,
.val = LP5562_RESET,
},
.enable = {
.addr = LP5562_REG_ENABLE,
.val = LP5562_ENABLE_DEFAULT,
},
.post_init_device = lp5562_post_init_device,
.set_led_current = lp5562_set_led_current,
.brightness_fn = lp5562_led_brightness,
.run_engine = lp5562_run_engine,
.firmware_cb = lp5562_firmware_loaded,
.dev_attr_group = &lp5562_group,
};
static int lp5562_probe(struct i2c_client *client)
{
int ret;
struct lp55xx_chip *chip;
struct lp55xx_led *led;
struct lp55xx_platform_data *pdata = dev_get_platdata(&client->dev);
struct device_node *np = dev_of_node(&client->dev);
chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
if (!chip)
return -ENOMEM;
chip->cfg = &lp5562_cfg;
if (!pdata) {
if (np) {
pdata = lp55xx_of_populate_pdata(&client->dev, np,
chip);
if (IS_ERR(pdata))
return PTR_ERR(pdata);
} else {
dev_err(&client->dev, "no platform data\n");
return -EINVAL;
}
}
led = devm_kcalloc(&client->dev,
pdata->num_channels, sizeof(*led), GFP_KERNEL);
if (!led)
return -ENOMEM;
chip->cl = client;
chip->pdata = pdata;
mutex_init(&chip->lock);
i2c_set_clientdata(client, led);
ret = lp55xx_init_device(chip);
if (ret)
goto err_init;
ret = lp55xx_register_leds(led, chip);
if (ret)
goto err_out;
ret = lp55xx_register_sysfs(chip);
if (ret) {
dev_err(&client->dev, "registering sysfs failed\n");
goto err_out;
}
return 0;
err_out:
lp55xx_deinit_device(chip);
err_init:
return ret;
}
static void lp5562_remove(struct i2c_client *client)
{
struct lp55xx_led *led = i2c_get_clientdata(client);
struct lp55xx_chip *chip = led->chip;
lp5562_stop_engine(chip);
lp55xx_unregister_sysfs(chip);
lp55xx_deinit_device(chip);
}
static const struct i2c_device_id lp5562_id[] = {
{ "lp5562", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, lp5562_id);
static const struct of_device_id of_lp5562_leds_match[] = {
{ .compatible = "ti,lp5562", },
{},
};
MODULE_DEVICE_TABLE(of, of_lp5562_leds_match);
static struct i2c_driver lp5562_driver = {
.driver = {
.name = "lp5562",
.of_match_table = of_lp5562_leds_match,
},
.probe = lp5562_probe,
.remove = lp5562_remove,
.id_table = lp5562_id,
};
module_i2c_driver(lp5562_driver);
MODULE_DESCRIPTION("Texas Instruments LP5562 LED Driver");
MODULE_AUTHOR("Milo Kim");
MODULE_LICENSE("GPL");
| linux-master | drivers/leds/leds-lp5562.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* linux/drivers/leds/leds-locomo.c
*
* Copyright (C) 2005 John Lenz <[email protected]>
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/leds.h>
#include <asm/hardware/locomo.h>
static void locomoled_brightness_set(struct led_classdev *led_cdev,
enum led_brightness value, int offset)
{
struct locomo_dev *locomo_dev = LOCOMO_DEV(led_cdev->dev->parent);
unsigned long flags;
local_irq_save(flags);
if (value)
locomo_writel(LOCOMO_LPT_TOFH, locomo_dev->mapbase + offset);
else
locomo_writel(LOCOMO_LPT_TOFL, locomo_dev->mapbase + offset);
local_irq_restore(flags);
}
static void locomoled_brightness_set0(struct led_classdev *led_cdev,
enum led_brightness value)
{
locomoled_brightness_set(led_cdev, value, LOCOMO_LPT0);
}
static void locomoled_brightness_set1(struct led_classdev *led_cdev,
enum led_brightness value)
{
locomoled_brightness_set(led_cdev, value, LOCOMO_LPT1);
}
static struct led_classdev locomo_led0 = {
.name = "locomo:amber:charge",
.default_trigger = "main-battery-charging",
.brightness_set = locomoled_brightness_set0,
};
static struct led_classdev locomo_led1 = {
.name = "locomo:green:mail",
.default_trigger = "nand-disk",
.brightness_set = locomoled_brightness_set1,
};
static int locomoled_probe(struct locomo_dev *ldev)
{
int ret;
ret = devm_led_classdev_register(&ldev->dev, &locomo_led0);
if (ret < 0)
return ret;
return devm_led_classdev_register(&ldev->dev, &locomo_led1);
}
static struct locomo_driver locomoled_driver = {
.drv = {
.name = "locomoled"
},
.devid = LOCOMO_DEVID_LED,
.probe = locomoled_probe,
};
static int __init locomoled_init(void)
{
return locomo_driver_register(&locomoled_driver);
}
module_init(locomoled_init);
MODULE_AUTHOR("John Lenz <[email protected]>");
MODULE_DESCRIPTION("Locomo LED driver");
MODULE_LICENSE("GPL");
| linux-master | drivers/leds/leds-locomo.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* LEDs driver for GPIOs
*
* Copyright (C) 2007 8D Technologies inc.
* Raphael Assenat <[email protected]>
* Copyright (C) 2008 Freescale Semiconductor, Inc.
*/
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/kernel.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/pinctrl/consumer.h>
#include <linux/platform_device.h>
#include <linux/property.h>
#include <linux/slab.h>
#include "leds.h"
struct gpio_led_data {
struct led_classdev cdev;
struct gpio_desc *gpiod;
u8 can_sleep;
u8 blinking;
gpio_blink_set_t platform_gpio_blink_set;
};
static inline struct gpio_led_data *
cdev_to_gpio_led_data(struct led_classdev *led_cdev)
{
return container_of(led_cdev, struct gpio_led_data, cdev);
}
static void gpio_led_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
struct gpio_led_data *led_dat = cdev_to_gpio_led_data(led_cdev);
int level;
if (value == LED_OFF)
level = 0;
else
level = 1;
if (led_dat->blinking) {
led_dat->platform_gpio_blink_set(led_dat->gpiod, level,
NULL, NULL);
led_dat->blinking = 0;
} else {
if (led_dat->can_sleep)
gpiod_set_value_cansleep(led_dat->gpiod, level);
else
gpiod_set_value(led_dat->gpiod, level);
}
}
static int gpio_led_set_blocking(struct led_classdev *led_cdev,
enum led_brightness value)
{
gpio_led_set(led_cdev, value);
return 0;
}
static int gpio_blink_set(struct led_classdev *led_cdev,
unsigned long *delay_on, unsigned long *delay_off)
{
struct gpio_led_data *led_dat = cdev_to_gpio_led_data(led_cdev);
led_dat->blinking = 1;
return led_dat->platform_gpio_blink_set(led_dat->gpiod, GPIO_LED_BLINK,
delay_on, delay_off);
}
static int create_gpio_led(const struct gpio_led *template,
struct gpio_led_data *led_dat, struct device *parent,
struct fwnode_handle *fwnode, gpio_blink_set_t blink_set)
{
struct led_init_data init_data = {};
struct pinctrl *pinctrl;
int ret, state;
led_dat->cdev.default_trigger = template->default_trigger;
led_dat->can_sleep = gpiod_cansleep(led_dat->gpiod);
if (!led_dat->can_sleep)
led_dat->cdev.brightness_set = gpio_led_set;
else
led_dat->cdev.brightness_set_blocking = gpio_led_set_blocking;
led_dat->blinking = 0;
if (blink_set) {
led_dat->platform_gpio_blink_set = blink_set;
led_dat->cdev.blink_set = gpio_blink_set;
}
if (template->default_state == LEDS_GPIO_DEFSTATE_KEEP) {
state = gpiod_get_value_cansleep(led_dat->gpiod);
if (state < 0)
return state;
} else {
state = (template->default_state == LEDS_GPIO_DEFSTATE_ON);
}
led_dat->cdev.brightness = state;
led_dat->cdev.max_brightness = 1;
if (!template->retain_state_suspended)
led_dat->cdev.flags |= LED_CORE_SUSPENDRESUME;
if (template->panic_indicator)
led_dat->cdev.flags |= LED_PANIC_INDICATOR;
if (template->retain_state_shutdown)
led_dat->cdev.flags |= LED_RETAIN_AT_SHUTDOWN;
ret = gpiod_direction_output(led_dat->gpiod, state);
if (ret < 0)
return ret;
if (template->name) {
led_dat->cdev.name = template->name;
ret = devm_led_classdev_register(parent, &led_dat->cdev);
} else {
init_data.fwnode = fwnode;
ret = devm_led_classdev_register_ext(parent, &led_dat->cdev,
&init_data);
}
if (ret)
return ret;
pinctrl = devm_pinctrl_get_select_default(led_dat->cdev.dev);
if (IS_ERR(pinctrl)) {
ret = PTR_ERR(pinctrl);
if (ret != -ENODEV) {
dev_warn(led_dat->cdev.dev,
"Failed to select %pOF pinctrl: %d\n",
to_of_node(fwnode), ret);
} else {
/* pinctrl-%d not present, not an error */
ret = 0;
}
}
return ret;
}
struct gpio_leds_priv {
int num_leds;
struct gpio_led_data leds[];
};
static struct gpio_leds_priv *gpio_leds_create(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct fwnode_handle *child;
struct gpio_leds_priv *priv;
int count, ret;
count = device_get_child_node_count(dev);
if (!count)
return ERR_PTR(-ENODEV);
priv = devm_kzalloc(dev, struct_size(priv, leds, count), GFP_KERNEL);
if (!priv)
return ERR_PTR(-ENOMEM);
device_for_each_child_node(dev, child) {
struct gpio_led_data *led_dat = &priv->leds[priv->num_leds];
struct gpio_led led = {};
/*
* Acquire gpiod from DT with uninitialized label, which
* will be updated after LED class device is registered,
* Only then the final LED name is known.
*/
led.gpiod = devm_fwnode_gpiod_get(dev, child, NULL, GPIOD_ASIS,
NULL);
if (IS_ERR(led.gpiod)) {
fwnode_handle_put(child);
return ERR_CAST(led.gpiod);
}
led_dat->gpiod = led.gpiod;
led.default_state = led_init_default_state_get(child);
if (fwnode_property_present(child, "retain-state-suspended"))
led.retain_state_suspended = 1;
if (fwnode_property_present(child, "retain-state-shutdown"))
led.retain_state_shutdown = 1;
if (fwnode_property_present(child, "panic-indicator"))
led.panic_indicator = 1;
ret = create_gpio_led(&led, led_dat, dev, child, NULL);
if (ret < 0) {
fwnode_handle_put(child);
return ERR_PTR(ret);
}
/* Set gpiod label to match the corresponding LED name. */
gpiod_set_consumer_name(led_dat->gpiod,
led_dat->cdev.dev->kobj.name);
priv->num_leds++;
}
return priv;
}
static const struct of_device_id of_gpio_leds_match[] = {
{ .compatible = "gpio-leds", },
{},
};
MODULE_DEVICE_TABLE(of, of_gpio_leds_match);
static struct gpio_desc *gpio_led_get_gpiod(struct device *dev, int idx,
const struct gpio_led *template)
{
struct gpio_desc *gpiod;
unsigned long flags = GPIOF_OUT_INIT_LOW;
int ret;
/*
* This means the LED does not come from the device tree
* or ACPI, so let's try just getting it by index from the
* device, this will hit the board file, if any and get
* the GPIO from there.
*/
gpiod = devm_gpiod_get_index(dev, NULL, idx, GPIOD_OUT_LOW);
if (!IS_ERR(gpiod)) {
gpiod_set_consumer_name(gpiod, template->name);
return gpiod;
}
if (PTR_ERR(gpiod) != -ENOENT)
return gpiod;
/*
* This is the legacy code path for platform code that
* still uses GPIO numbers. Ultimately we would like to get
* rid of this block completely.
*/
/* skip leds that aren't available */
if (!gpio_is_valid(template->gpio))
return ERR_PTR(-ENOENT);
if (template->active_low)
flags |= GPIOF_ACTIVE_LOW;
ret = devm_gpio_request_one(dev, template->gpio, flags,
template->name);
if (ret < 0)
return ERR_PTR(ret);
gpiod = gpio_to_desc(template->gpio);
if (!gpiod)
return ERR_PTR(-EINVAL);
return gpiod;
}
static int gpio_led_probe(struct platform_device *pdev)
{
struct gpio_led_platform_data *pdata = dev_get_platdata(&pdev->dev);
struct gpio_leds_priv *priv;
int i, ret = 0;
if (pdata && pdata->num_leds) {
priv = devm_kzalloc(&pdev->dev, struct_size(priv, leds, pdata->num_leds),
GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->num_leds = pdata->num_leds;
for (i = 0; i < priv->num_leds; i++) {
const struct gpio_led *template = &pdata->leds[i];
struct gpio_led_data *led_dat = &priv->leds[i];
if (template->gpiod)
led_dat->gpiod = template->gpiod;
else
led_dat->gpiod =
gpio_led_get_gpiod(&pdev->dev,
i, template);
if (IS_ERR(led_dat->gpiod)) {
dev_info(&pdev->dev, "Skipping unavailable LED gpio %d (%s)\n",
template->gpio, template->name);
continue;
}
ret = create_gpio_led(template, led_dat,
&pdev->dev, NULL,
pdata->gpio_blink_set);
if (ret < 0)
return ret;
}
} else {
priv = gpio_leds_create(pdev);
if (IS_ERR(priv))
return PTR_ERR(priv);
}
platform_set_drvdata(pdev, priv);
return 0;
}
static void gpio_led_shutdown(struct platform_device *pdev)
{
struct gpio_leds_priv *priv = platform_get_drvdata(pdev);
int i;
for (i = 0; i < priv->num_leds; i++) {
struct gpio_led_data *led = &priv->leds[i];
if (!(led->cdev.flags & LED_RETAIN_AT_SHUTDOWN))
gpio_led_set(&led->cdev, LED_OFF);
}
}
static struct platform_driver gpio_led_driver = {
.probe = gpio_led_probe,
.shutdown = gpio_led_shutdown,
.driver = {
.name = "leds-gpio",
.of_match_table = of_gpio_leds_match,
},
};
module_platform_driver(gpio_led_driver);
MODULE_AUTHOR("Raphael Assenat <[email protected]>, Trent Piepho <[email protected]>");
MODULE_DESCRIPTION("GPIO LED driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:leds-gpio");
| linux-master | drivers/leds/leds-gpio.c |
// SPDX-License-Identifier: GPL-2.0
// TI LM3692x LED chip family driver
// Copyright (C) 2017-18 Texas Instruments Incorporated - https://www.ti.com/
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/leds.h>
#include <linux/log2.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#define LM36922_MODEL 0
#define LM36923_MODEL 1
#define LM3692X_REV 0x0
#define LM3692X_RESET 0x1
#define LM3692X_EN 0x10
#define LM3692X_BRT_CTRL 0x11
#define LM3692X_PWM_CTRL 0x12
#define LM3692X_BOOST_CTRL 0x13
#define LM3692X_AUTO_FREQ_HI 0x15
#define LM3692X_AUTO_FREQ_LO 0x16
#define LM3692X_BL_ADJ_THRESH 0x17
#define LM3692X_BRT_LSB 0x18
#define LM3692X_BRT_MSB 0x19
#define LM3692X_FAULT_CTRL 0x1e
#define LM3692X_FAULT_FLAGS 0x1f
#define LM3692X_SW_RESET BIT(0)
#define LM3692X_DEVICE_EN BIT(0)
#define LM3692X_LED1_EN BIT(1)
#define LM3692X_LED2_EN BIT(2)
#define LM36923_LED3_EN BIT(3)
#define LM3692X_ENABLE_MASK (LM3692X_DEVICE_EN | LM3692X_LED1_EN | \
LM3692X_LED2_EN | LM36923_LED3_EN)
/* Brightness Control Bits */
#define LM3692X_BL_ADJ_POL BIT(0)
#define LM3692X_RAMP_RATE_125us 0x00
#define LM3692X_RAMP_RATE_250us BIT(1)
#define LM3692X_RAMP_RATE_500us BIT(2)
#define LM3692X_RAMP_RATE_1ms (BIT(1) | BIT(2))
#define LM3692X_RAMP_RATE_2ms BIT(3)
#define LM3692X_RAMP_RATE_4ms (BIT(3) | BIT(1))
#define LM3692X_RAMP_RATE_8ms (BIT(2) | BIT(3))
#define LM3692X_RAMP_RATE_16ms (BIT(1) | BIT(2) | BIT(3))
#define LM3692X_RAMP_EN BIT(4)
#define LM3692X_BRHT_MODE_REG 0x00
#define LM3692X_BRHT_MODE_PWM BIT(5)
#define LM3692X_BRHT_MODE_MULTI_RAMP BIT(6)
#define LM3692X_BRHT_MODE_RAMP_MULTI (BIT(5) | BIT(6))
#define LM3692X_MAP_MODE_EXP BIT(7)
/* PWM Register Bits */
#define LM3692X_PWM_FILTER_100 BIT(0)
#define LM3692X_PWM_FILTER_150 BIT(1)
#define LM3692X_PWM_FILTER_200 (BIT(0) | BIT(1))
#define LM3692X_PWM_HYSTER_1LSB BIT(2)
#define LM3692X_PWM_HYSTER_2LSB BIT(3)
#define LM3692X_PWM_HYSTER_3LSB (BIT(3) | BIT(2))
#define LM3692X_PWM_HYSTER_4LSB BIT(4)
#define LM3692X_PWM_HYSTER_5LSB (BIT(4) | BIT(2))
#define LM3692X_PWM_HYSTER_6LSB (BIT(4) | BIT(3))
#define LM3692X_PWM_POLARITY BIT(5)
#define LM3692X_PWM_SAMP_4MHZ BIT(6)
#define LM3692X_PWM_SAMP_24MHZ BIT(7)
/* Boost Control Bits */
#define LM3692X_OCP_PROT_1A BIT(0)
#define LM3692X_OCP_PROT_1_25A BIT(1)
#define LM3692X_OCP_PROT_1_5A (BIT(0) | BIT(1))
#define LM3692X_OVP_21V BIT(2)
#define LM3692X_OVP_25V BIT(3)
#define LM3692X_OVP_29V (BIT(2) | BIT(3))
#define LM3692X_MIN_IND_22UH BIT(4)
#define LM3692X_BOOST_SW_1MHZ BIT(5)
#define LM3692X_BOOST_SW_NO_SHIFT BIT(6)
/* Fault Control Bits */
#define LM3692X_FAULT_CTRL_OVP BIT(0)
#define LM3692X_FAULT_CTRL_OCP BIT(1)
#define LM3692X_FAULT_CTRL_TSD BIT(2)
#define LM3692X_FAULT_CTRL_OPEN BIT(3)
/* Fault Flag Bits */
#define LM3692X_FAULT_FLAG_OVP BIT(0)
#define LM3692X_FAULT_FLAG_OCP BIT(1)
#define LM3692X_FAULT_FLAG_TSD BIT(2)
#define LM3692X_FAULT_FLAG_SHRT BIT(3)
#define LM3692X_FAULT_FLAG_OPEN BIT(4)
/**
* struct lm3692x_led
* @lock: Lock for reading/writing the device
* @client: Pointer to the I2C client
* @led_dev: LED class device pointer
* @regmap: Devices register map
* @enable_gpio: VDDIO/EN gpio to enable communication interface
* @regulator: LED supply regulator pointer
* @led_enable: LED sync to be enabled
* @model_id: Current device model ID enumerated
*/
struct lm3692x_led {
struct mutex lock;
struct i2c_client *client;
struct led_classdev led_dev;
struct regmap *regmap;
struct gpio_desc *enable_gpio;
struct regulator *regulator;
int led_enable;
int model_id;
u8 boost_ctrl, brightness_ctrl;
bool enabled;
};
static const struct reg_default lm3692x_reg_defs[] = {
{LM3692X_EN, 0xf},
{LM3692X_BRT_CTRL, 0x61},
{LM3692X_PWM_CTRL, 0x73},
{LM3692X_BOOST_CTRL, 0x6f},
{LM3692X_AUTO_FREQ_HI, 0x0},
{LM3692X_AUTO_FREQ_LO, 0x0},
{LM3692X_BL_ADJ_THRESH, 0x0},
{LM3692X_BRT_LSB, 0x7},
{LM3692X_BRT_MSB, 0xff},
{LM3692X_FAULT_CTRL, 0x7},
};
static const struct regmap_config lm3692x_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = LM3692X_FAULT_FLAGS,
.reg_defaults = lm3692x_reg_defs,
.num_reg_defaults = ARRAY_SIZE(lm3692x_reg_defs),
.cache_type = REGCACHE_RBTREE,
};
static int lm3692x_fault_check(struct lm3692x_led *led)
{
int ret;
unsigned int read_buf;
ret = regmap_read(led->regmap, LM3692X_FAULT_FLAGS, &read_buf);
if (ret)
return ret;
if (read_buf)
dev_err(&led->client->dev, "Detected a fault 0x%X\n", read_buf);
/* The first read may clear the fault. Check again to see if the fault
* still exits and return that value.
*/
regmap_read(led->regmap, LM3692X_FAULT_FLAGS, &read_buf);
if (read_buf)
dev_err(&led->client->dev, "Second read of fault flags 0x%X\n",
read_buf);
return read_buf;
}
static int lm3692x_leds_enable(struct lm3692x_led *led)
{
int enable_state;
int ret, reg_ret;
if (led->enabled)
return 0;
if (led->regulator) {
ret = regulator_enable(led->regulator);
if (ret) {
dev_err(&led->client->dev,
"Failed to enable regulator: %d\n", ret);
return ret;
}
}
if (led->enable_gpio)
gpiod_direction_output(led->enable_gpio, 1);
ret = lm3692x_fault_check(led);
if (ret) {
dev_err(&led->client->dev, "Cannot read/clear faults: %d\n",
ret);
goto out;
}
ret = regmap_write(led->regmap, LM3692X_BRT_CTRL, 0x00);
if (ret)
goto out;
/*
* For glitch free operation, the following data should
* only be written while LEDx enable bits are 0 and the device enable
* bit is set to 1.
* per Section 7.5.14 of the data sheet
*/
ret = regmap_write(led->regmap, LM3692X_EN, LM3692X_DEVICE_EN);
if (ret)
goto out;
/* Set the brightness to 0 so when enabled the LEDs do not come
* on with full brightness.
*/
ret = regmap_write(led->regmap, LM3692X_BRT_MSB, 0);
if (ret)
goto out;
ret = regmap_write(led->regmap, LM3692X_BRT_LSB, 0);
if (ret)
goto out;
ret = regmap_write(led->regmap, LM3692X_PWM_CTRL,
LM3692X_PWM_FILTER_100 | LM3692X_PWM_SAMP_24MHZ);
if (ret)
goto out;
ret = regmap_write(led->regmap, LM3692X_BOOST_CTRL, led->boost_ctrl);
if (ret)
goto out;
ret = regmap_write(led->regmap, LM3692X_AUTO_FREQ_HI, 0x00);
if (ret)
goto out;
ret = regmap_write(led->regmap, LM3692X_AUTO_FREQ_LO, 0x00);
if (ret)
goto out;
ret = regmap_write(led->regmap, LM3692X_BL_ADJ_THRESH, 0x00);
if (ret)
goto out;
ret = regmap_write(led->regmap, LM3692X_BRT_CTRL,
LM3692X_BL_ADJ_POL | LM3692X_RAMP_EN);
if (ret)
goto out;
switch (led->led_enable) {
case 0:
default:
if (led->model_id == LM36923_MODEL)
enable_state = LM3692X_LED1_EN | LM3692X_LED2_EN |
LM36923_LED3_EN;
else
enable_state = LM3692X_LED1_EN | LM3692X_LED2_EN;
break;
case 1:
enable_state = LM3692X_LED1_EN;
break;
case 2:
enable_state = LM3692X_LED2_EN;
break;
case 3:
if (led->model_id == LM36923_MODEL) {
enable_state = LM36923_LED3_EN;
break;
}
ret = -EINVAL;
dev_err(&led->client->dev,
"LED3 sync not available on this device\n");
goto out;
}
ret = regmap_update_bits(led->regmap, LM3692X_EN, LM3692X_ENABLE_MASK,
enable_state | LM3692X_DEVICE_EN);
led->enabled = true;
return ret;
out:
dev_err(&led->client->dev, "Fail writing initialization values\n");
if (led->enable_gpio)
gpiod_direction_output(led->enable_gpio, 0);
if (led->regulator) {
reg_ret = regulator_disable(led->regulator);
if (reg_ret)
dev_err(&led->client->dev,
"Failed to disable regulator: %d\n", reg_ret);
}
return ret;
}
static int lm3692x_leds_disable(struct lm3692x_led *led)
{
int ret;
if (!led->enabled)
return 0;
ret = regmap_update_bits(led->regmap, LM3692X_EN, LM3692X_DEVICE_EN, 0);
if (ret) {
dev_err(&led->client->dev, "Failed to disable regulator: %d\n",
ret);
return ret;
}
if (led->enable_gpio)
gpiod_direction_output(led->enable_gpio, 0);
if (led->regulator) {
ret = regulator_disable(led->regulator);
if (ret)
dev_err(&led->client->dev,
"Failed to disable regulator: %d\n", ret);
}
led->enabled = false;
return ret;
}
static int lm3692x_brightness_set(struct led_classdev *led_cdev,
enum led_brightness brt_val)
{
struct lm3692x_led *led =
container_of(led_cdev, struct lm3692x_led, led_dev);
int ret;
int led_brightness_lsb = (brt_val >> 5);
mutex_lock(&led->lock);
if (brt_val == 0) {
ret = lm3692x_leds_disable(led);
goto out;
} else {
lm3692x_leds_enable(led);
}
ret = lm3692x_fault_check(led);
if (ret) {
dev_err(&led->client->dev, "Cannot read/clear faults: %d\n",
ret);
goto out;
}
ret = regmap_write(led->regmap, LM3692X_BRT_MSB, brt_val);
if (ret) {
dev_err(&led->client->dev, "Cannot write MSB: %d\n", ret);
goto out;
}
ret = regmap_write(led->regmap, LM3692X_BRT_LSB, led_brightness_lsb);
if (ret) {
dev_err(&led->client->dev, "Cannot write LSB: %d\n", ret);
goto out;
}
out:
mutex_unlock(&led->lock);
return ret;
}
static enum led_brightness lm3692x_max_brightness(struct lm3692x_led *led,
u32 max_cur)
{
u32 max_code;
/* see p.12 of LM36922 data sheet for brightness formula */
max_code = ((max_cur * 1000) - 37806) / 12195;
if (max_code > 0x7FF)
max_code = 0x7FF;
return max_code >> 3;
}
static int lm3692x_probe_dt(struct lm3692x_led *led)
{
struct fwnode_handle *child = NULL;
struct led_init_data init_data = {};
u32 ovp, max_cur;
int ret;
led->enable_gpio = devm_gpiod_get_optional(&led->client->dev,
"enable", GPIOD_OUT_LOW);
if (IS_ERR(led->enable_gpio)) {
ret = PTR_ERR(led->enable_gpio);
dev_err(&led->client->dev, "Failed to get enable gpio: %d\n",
ret);
return ret;
}
led->regulator = devm_regulator_get_optional(&led->client->dev, "vled");
if (IS_ERR(led->regulator)) {
ret = PTR_ERR(led->regulator);
if (ret != -ENODEV)
return dev_err_probe(&led->client->dev, ret,
"Failed to get vled regulator\n");
led->regulator = NULL;
}
led->boost_ctrl = LM3692X_BOOST_SW_1MHZ |
LM3692X_BOOST_SW_NO_SHIFT |
LM3692X_OCP_PROT_1_5A;
ret = device_property_read_u32(&led->client->dev,
"ti,ovp-microvolt", &ovp);
if (ret) {
led->boost_ctrl |= LM3692X_OVP_29V;
} else {
switch (ovp) {
case 17000000:
break;
case 21000000:
led->boost_ctrl |= LM3692X_OVP_21V;
break;
case 25000000:
led->boost_ctrl |= LM3692X_OVP_25V;
break;
case 29000000:
led->boost_ctrl |= LM3692X_OVP_29V;
break;
default:
dev_err(&led->client->dev, "Invalid OVP %d\n", ovp);
return -EINVAL;
}
}
child = device_get_next_child_node(&led->client->dev, child);
if (!child) {
dev_err(&led->client->dev, "No LED Child node\n");
return -ENODEV;
}
ret = fwnode_property_read_u32(child, "reg", &led->led_enable);
if (ret) {
fwnode_handle_put(child);
dev_err(&led->client->dev, "reg DT property missing\n");
return ret;
}
ret = fwnode_property_read_u32(child, "led-max-microamp", &max_cur);
led->led_dev.max_brightness = ret ? LED_FULL :
lm3692x_max_brightness(led, max_cur);
init_data.fwnode = child;
init_data.devicename = led->client->name;
init_data.default_label = ":";
ret = devm_led_classdev_register_ext(&led->client->dev, &led->led_dev,
&init_data);
if (ret)
dev_err(&led->client->dev, "led register err: %d\n", ret);
fwnode_handle_put(init_data.fwnode);
return ret;
}
static int lm3692x_probe(struct i2c_client *client)
{
const struct i2c_device_id *id = i2c_client_get_device_id(client);
struct lm3692x_led *led;
int ret;
led = devm_kzalloc(&client->dev, sizeof(*led), GFP_KERNEL);
if (!led)
return -ENOMEM;
mutex_init(&led->lock);
led->client = client;
led->led_dev.brightness_set_blocking = lm3692x_brightness_set;
led->model_id = id->driver_data;
i2c_set_clientdata(client, led);
led->regmap = devm_regmap_init_i2c(client, &lm3692x_regmap_config);
if (IS_ERR(led->regmap)) {
ret = PTR_ERR(led->regmap);
dev_err(&client->dev, "Failed to allocate register map: %d\n",
ret);
return ret;
}
ret = lm3692x_probe_dt(led);
if (ret)
return ret;
ret = lm3692x_leds_enable(led);
if (ret)
return ret;
return 0;
}
static void lm3692x_remove(struct i2c_client *client)
{
struct lm3692x_led *led = i2c_get_clientdata(client);
lm3692x_leds_disable(led);
mutex_destroy(&led->lock);
}
static const struct i2c_device_id lm3692x_id[] = {
{ "lm36922", LM36922_MODEL },
{ "lm36923", LM36923_MODEL },
{ }
};
MODULE_DEVICE_TABLE(i2c, lm3692x_id);
static const struct of_device_id of_lm3692x_leds_match[] = {
{ .compatible = "ti,lm36922", },
{ .compatible = "ti,lm36923", },
{},
};
MODULE_DEVICE_TABLE(of, of_lm3692x_leds_match);
static struct i2c_driver lm3692x_driver = {
.driver = {
.name = "lm3692x",
.of_match_table = of_lm3692x_leds_match,
},
.probe = lm3692x_probe,
.remove = lm3692x_remove,
.id_table = lm3692x_id,
};
module_i2c_driver(lm3692x_driver);
MODULE_DESCRIPTION("Texas Instruments LM3692X LED driver");
MODULE_AUTHOR("Dan Murphy <[email protected]>");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/leds-lm3692x.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Simple driver for Texas Instruments LM355x LED Flash driver chip
* Copyright (C) 2012 Texas Instruments
*/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/leds.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/fs.h>
#include <linux/regmap.h>
#include <linux/platform_data/leds-lm355x.h>
enum lm355x_type {
CHIP_LM3554 = 0,
CHIP_LM3556,
};
enum lm355x_regs {
REG_FLAG = 0,
REG_TORCH_CFG,
REG_TORCH_CTRL,
REG_STROBE_CFG,
REG_FLASH_CTRL,
REG_INDI_CFG,
REG_INDI_CTRL,
REG_OPMODE,
REG_MAX,
};
/* operation mode */
enum lm355x_mode {
MODE_SHDN = 0,
MODE_INDIC,
MODE_TORCH,
MODE_FLASH
};
/* register map info. */
struct lm355x_reg_data {
u8 regno;
u8 mask;
u8 shift;
};
struct lm355x_chip_data {
struct device *dev;
enum lm355x_type type;
struct led_classdev cdev_flash;
struct led_classdev cdev_torch;
struct led_classdev cdev_indicator;
struct lm355x_platform_data *pdata;
struct regmap *regmap;
struct mutex lock;
unsigned int last_flag;
struct lm355x_reg_data *regs;
};
/* specific indicator function for lm3556 */
enum lm3556_indic_pulse_time {
PULSE_TIME_0_MS = 0,
PULSE_TIME_32_MS,
PULSE_TIME_64_MS,
PULSE_TIME_92_MS,
PULSE_TIME_128_MS,
PULSE_TIME_160_MS,
PULSE_TIME_196_MS,
PULSE_TIME_224_MS,
PULSE_TIME_256_MS,
PULSE_TIME_288_MS,
PULSE_TIME_320_MS,
PULSE_TIME_352_MS,
PULSE_TIME_384_MS,
PULSE_TIME_416_MS,
PULSE_TIME_448_MS,
PULSE_TIME_480_MS,
};
enum lm3556_indic_n_blank {
INDIC_N_BLANK_0 = 0,
INDIC_N_BLANK_1,
INDIC_N_BLANK_2,
INDIC_N_BLANK_3,
INDIC_N_BLANK_4,
INDIC_N_BLANK_5,
INDIC_N_BLANK_6,
INDIC_N_BLANK_7,
INDIC_N_BLANK_8,
INDIC_N_BLANK_9,
INDIC_N_BLANK_10,
INDIC_N_BLANK_11,
INDIC_N_BLANK_12,
INDIC_N_BLANK_13,
INDIC_N_BLANK_14,
INDIC_N_BLANK_15,
};
enum lm3556_indic_period {
INDIC_PERIOD_0 = 0,
INDIC_PERIOD_1,
INDIC_PERIOD_2,
INDIC_PERIOD_3,
INDIC_PERIOD_4,
INDIC_PERIOD_5,
INDIC_PERIOD_6,
INDIC_PERIOD_7,
};
#define INDIC_PATTERN_SIZE 4
struct indicator {
u8 blinking;
u8 period_cnt;
};
/* indicator pattern data only for lm3556 */
static struct indicator indicator_pattern[INDIC_PATTERN_SIZE] = {
[0] = {(INDIC_N_BLANK_1 << 4) | PULSE_TIME_32_MS, INDIC_PERIOD_1},
[1] = {(INDIC_N_BLANK_15 << 4) | PULSE_TIME_32_MS, INDIC_PERIOD_2},
[2] = {(INDIC_N_BLANK_10 << 4) | PULSE_TIME_32_MS, INDIC_PERIOD_4},
[3] = {(INDIC_N_BLANK_5 << 4) | PULSE_TIME_32_MS, INDIC_PERIOD_7},
};
static struct lm355x_reg_data lm3554_regs[REG_MAX] = {
[REG_FLAG] = {0xD0, 0xBF, 0},
[REG_TORCH_CFG] = {0xE0, 0x80, 7},
[REG_TORCH_CTRL] = {0xA0, 0x38, 3},
[REG_STROBE_CFG] = {0xE0, 0x04, 2},
[REG_FLASH_CTRL] = {0xB0, 0x78, 3},
[REG_INDI_CFG] = {0xE0, 0x08, 3},
[REG_INDI_CTRL] = {0xA0, 0xC0, 6},
[REG_OPMODE] = {0xA0, 0x03, 0},
};
static struct lm355x_reg_data lm3556_regs[REG_MAX] = {
[REG_FLAG] = {0x0B, 0xFF, 0},
[REG_TORCH_CFG] = {0x0A, 0x10, 4},
[REG_TORCH_CTRL] = {0x09, 0x70, 4},
[REG_STROBE_CFG] = {0x0A, 0x20, 5},
[REG_FLASH_CTRL] = {0x09, 0x0F, 0},
[REG_INDI_CFG] = {0xFF, 0xFF, 0},
[REG_INDI_CTRL] = {0x09, 0x70, 4},
[REG_OPMODE] = {0x0A, 0x03, 0},
};
static char lm355x_name[][I2C_NAME_SIZE] = {
[CHIP_LM3554] = LM3554_NAME,
[CHIP_LM3556] = LM3556_NAME,
};
/* chip initialize */
static int lm355x_chip_init(struct lm355x_chip_data *chip)
{
int ret;
unsigned int reg_val;
struct lm355x_platform_data *pdata = chip->pdata;
/* input and output pins configuration */
switch (chip->type) {
case CHIP_LM3554:
reg_val = (u32)pdata->pin_tx2 | (u32)pdata->ntc_pin;
ret = regmap_update_bits(chip->regmap, 0xE0, 0x28, reg_val);
if (ret < 0)
goto out;
reg_val = (u32)pdata->pass_mode;
ret = regmap_update_bits(chip->regmap, 0xA0, 0x04, reg_val);
if (ret < 0)
goto out;
break;
case CHIP_LM3556:
reg_val = (u32)pdata->pin_tx2 | (u32)pdata->ntc_pin |
(u32)pdata->pass_mode;
ret = regmap_update_bits(chip->regmap, 0x0A, 0xC4, reg_val);
if (ret < 0)
goto out;
break;
default:
return -ENODATA;
}
return ret;
out:
dev_err(chip->dev, "%s:i2c access fail to register\n", __func__);
return ret;
}
/* chip control */
static int lm355x_control(struct lm355x_chip_data *chip,
u8 brightness, enum lm355x_mode opmode)
{
int ret;
unsigned int reg_val;
struct lm355x_platform_data *pdata = chip->pdata;
struct lm355x_reg_data *preg = chip->regs;
ret = regmap_read(chip->regmap, preg[REG_FLAG].regno, &chip->last_flag);
if (ret < 0)
goto out;
if (chip->last_flag & preg[REG_FLAG].mask)
dev_info(chip->dev, "%s Last FLAG is 0x%x\n",
lm355x_name[chip->type],
chip->last_flag & preg[REG_FLAG].mask);
/* brightness 0 means shutdown */
if (!brightness)
opmode = MODE_SHDN;
switch (opmode) {
case MODE_TORCH:
ret =
regmap_update_bits(chip->regmap, preg[REG_TORCH_CTRL].regno,
preg[REG_TORCH_CTRL].mask,
(brightness - 1)
<< preg[REG_TORCH_CTRL].shift);
if (ret < 0)
goto out;
if (pdata->pin_tx1 != LM355x_PIN_TORCH_DISABLE) {
ret =
regmap_update_bits(chip->regmap,
preg[REG_TORCH_CFG].regno,
preg[REG_TORCH_CFG].mask,
0x01 <<
preg[REG_TORCH_CFG].shift);
if (ret < 0)
goto out;
opmode = MODE_SHDN;
dev_info(chip->dev,
"torch brt is set - ext. torch pin mode\n");
}
break;
case MODE_FLASH:
ret =
regmap_update_bits(chip->regmap, preg[REG_FLASH_CTRL].regno,
preg[REG_FLASH_CTRL].mask,
(brightness - 1)
<< preg[REG_FLASH_CTRL].shift);
if (ret < 0)
goto out;
if (pdata->pin_strobe != LM355x_PIN_STROBE_DISABLE) {
if (chip->type == CHIP_LM3554)
reg_val = 0x00;
else
reg_val = 0x01;
ret =
regmap_update_bits(chip->regmap,
preg[REG_STROBE_CFG].regno,
preg[REG_STROBE_CFG].mask,
reg_val <<
preg[REG_STROBE_CFG].shift);
if (ret < 0)
goto out;
opmode = MODE_SHDN;
dev_info(chip->dev,
"flash brt is set - ext. strobe pin mode\n");
}
break;
case MODE_INDIC:
ret =
regmap_update_bits(chip->regmap, preg[REG_INDI_CTRL].regno,
preg[REG_INDI_CTRL].mask,
(brightness - 1)
<< preg[REG_INDI_CTRL].shift);
if (ret < 0)
goto out;
if (pdata->pin_tx2 != LM355x_PIN_TX_DISABLE) {
ret =
regmap_update_bits(chip->regmap,
preg[REG_INDI_CFG].regno,
preg[REG_INDI_CFG].mask,
0x01 <<
preg[REG_INDI_CFG].shift);
if (ret < 0)
goto out;
opmode = MODE_SHDN;
}
break;
case MODE_SHDN:
break;
default:
return -EINVAL;
}
/* operation mode control */
ret = regmap_update_bits(chip->regmap, preg[REG_OPMODE].regno,
preg[REG_OPMODE].mask,
opmode << preg[REG_OPMODE].shift);
if (ret < 0)
goto out;
return ret;
out:
dev_err(chip->dev, "%s:i2c access fail to register\n", __func__);
return ret;
}
/* torch */
static int lm355x_torch_brightness_set(struct led_classdev *cdev,
enum led_brightness brightness)
{
struct lm355x_chip_data *chip =
container_of(cdev, struct lm355x_chip_data, cdev_torch);
int ret;
mutex_lock(&chip->lock);
ret = lm355x_control(chip, brightness, MODE_TORCH);
mutex_unlock(&chip->lock);
return ret;
}
/* flash */
static int lm355x_strobe_brightness_set(struct led_classdev *cdev,
enum led_brightness brightness)
{
struct lm355x_chip_data *chip =
container_of(cdev, struct lm355x_chip_data, cdev_flash);
int ret;
mutex_lock(&chip->lock);
ret = lm355x_control(chip, brightness, MODE_FLASH);
mutex_unlock(&chip->lock);
return ret;
}
/* indicator */
static int lm355x_indicator_brightness_set(struct led_classdev *cdev,
enum led_brightness brightness)
{
struct lm355x_chip_data *chip =
container_of(cdev, struct lm355x_chip_data, cdev_indicator);
int ret;
mutex_lock(&chip->lock);
ret = lm355x_control(chip, brightness, MODE_INDIC);
mutex_unlock(&chip->lock);
return ret;
}
/* indicator pattern only for lm3556*/
static ssize_t pattern_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
ssize_t ret;
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct lm355x_chip_data *chip =
container_of(led_cdev, struct lm355x_chip_data, cdev_indicator);
unsigned int state;
ret = kstrtouint(buf, 10, &state);
if (ret)
goto out;
if (state > INDIC_PATTERN_SIZE - 1)
state = INDIC_PATTERN_SIZE - 1;
ret = regmap_write(chip->regmap, 0x04,
indicator_pattern[state].blinking);
if (ret < 0)
goto out;
ret = regmap_write(chip->regmap, 0x05,
indicator_pattern[state].period_cnt);
if (ret < 0)
goto out;
return size;
out:
dev_err(chip->dev, "%s:i2c access fail to register\n", __func__);
return ret;
}
static DEVICE_ATTR_WO(pattern);
static struct attribute *lm355x_indicator_attrs[] = {
&dev_attr_pattern.attr,
NULL
};
ATTRIBUTE_GROUPS(lm355x_indicator);
static const struct regmap_config lm355x_regmap = {
.reg_bits = 8,
.val_bits = 8,
.max_register = 0xFF,
};
/* module initialize */
static int lm355x_probe(struct i2c_client *client)
{
const struct i2c_device_id *id = i2c_client_get_device_id(client);
struct lm355x_platform_data *pdata = dev_get_platdata(&client->dev);
struct lm355x_chip_data *chip;
int err;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
dev_err(&client->dev, "i2c functionality check fail.\n");
return -EOPNOTSUPP;
}
if (pdata == NULL) {
dev_err(&client->dev, "needs Platform Data.\n");
return -ENODATA;
}
chip = devm_kzalloc(&client->dev,
sizeof(struct lm355x_chip_data), GFP_KERNEL);
if (!chip)
return -ENOMEM;
chip->dev = &client->dev;
chip->type = id->driver_data;
switch (id->driver_data) {
case CHIP_LM3554:
chip->regs = lm3554_regs;
break;
case CHIP_LM3556:
chip->regs = lm3556_regs;
break;
default:
return -ENOSYS;
}
chip->pdata = pdata;
chip->regmap = devm_regmap_init_i2c(client, &lm355x_regmap);
if (IS_ERR(chip->regmap)) {
err = PTR_ERR(chip->regmap);
dev_err(&client->dev,
"Failed to allocate register map: %d\n", err);
return err;
}
mutex_init(&chip->lock);
i2c_set_clientdata(client, chip);
err = lm355x_chip_init(chip);
if (err < 0)
goto err_out;
/* flash */
chip->cdev_flash.name = "flash";
chip->cdev_flash.max_brightness = 16;
chip->cdev_flash.brightness_set_blocking = lm355x_strobe_brightness_set;
chip->cdev_flash.default_trigger = "flash";
err = led_classdev_register(&client->dev, &chip->cdev_flash);
if (err < 0)
goto err_out;
/* torch */
chip->cdev_torch.name = "torch";
chip->cdev_torch.max_brightness = 8;
chip->cdev_torch.brightness_set_blocking = lm355x_torch_brightness_set;
chip->cdev_torch.default_trigger = "torch";
err = led_classdev_register(&client->dev, &chip->cdev_torch);
if (err < 0)
goto err_create_torch_file;
/* indicator */
chip->cdev_indicator.name = "indicator";
if (id->driver_data == CHIP_LM3554)
chip->cdev_indicator.max_brightness = 4;
else
chip->cdev_indicator.max_brightness = 8;
chip->cdev_indicator.brightness_set_blocking =
lm355x_indicator_brightness_set;
/* indicator pattern control only for LM3556 */
if (id->driver_data == CHIP_LM3556)
chip->cdev_indicator.groups = lm355x_indicator_groups;
err = led_classdev_register(&client->dev, &chip->cdev_indicator);
if (err < 0)
goto err_create_indicator_file;
dev_info(&client->dev, "%s is initialized\n",
lm355x_name[id->driver_data]);
return 0;
err_create_indicator_file:
led_classdev_unregister(&chip->cdev_torch);
err_create_torch_file:
led_classdev_unregister(&chip->cdev_flash);
err_out:
return err;
}
static void lm355x_remove(struct i2c_client *client)
{
struct lm355x_chip_data *chip = i2c_get_clientdata(client);
struct lm355x_reg_data *preg = chip->regs;
regmap_write(chip->regmap, preg[REG_OPMODE].regno, 0);
led_classdev_unregister(&chip->cdev_indicator);
led_classdev_unregister(&chip->cdev_torch);
led_classdev_unregister(&chip->cdev_flash);
dev_info(&client->dev, "%s is removed\n", lm355x_name[chip->type]);
}
static const struct i2c_device_id lm355x_id[] = {
{LM3554_NAME, CHIP_LM3554},
{LM3556_NAME, CHIP_LM3556},
{}
};
MODULE_DEVICE_TABLE(i2c, lm355x_id);
static struct i2c_driver lm355x_i2c_driver = {
.driver = {
.name = LM355x_NAME,
.pm = NULL,
},
.probe = lm355x_probe,
.remove = lm355x_remove,
.id_table = lm355x_id,
};
module_i2c_driver(lm355x_i2c_driver);
MODULE_DESCRIPTION("Texas Instruments Flash Lighting driver for LM355x");
MODULE_AUTHOR("Daniel Jeong <[email protected]>");
MODULE_AUTHOR("G.Shark Jeong <[email protected]>");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/leds-lm355x.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2015-16 Golden Delicious Computers
*
* Author: Nikolaus Schaller <[email protected]>
*
* LED driver for the IS31FL319{0,1,3,6,9} to drive 1, 3, 6 or 9 light
* effect LEDs.
*/
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/leds.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/property.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
/* register numbers */
#define IS31FL319X_SHUTDOWN 0x00
/* registers for 3190, 3191 and 3193 */
#define IS31FL3190_BREATHING 0x01
#define IS31FL3190_LEDMODE 0x02
#define IS31FL3190_CURRENT 0x03
#define IS31FL3190_PWM(channel) (0x04 + channel)
#define IS31FL3190_DATA_UPDATE 0x07
#define IS31FL3190_T0(channel) (0x0a + channel)
#define IS31FL3190_T1T2(channel) (0x10 + channel)
#define IS31FL3190_T3T4(channel) (0x16 + channel)
#define IS31FL3190_TIME_UPDATE 0x1c
#define IS31FL3190_LEDCONTROL 0x1d
#define IS31FL3190_RESET 0x2f
#define IS31FL3190_CURRENT_uA_MIN 5000
#define IS31FL3190_CURRENT_uA_DEFAULT 42000
#define IS31FL3190_CURRENT_uA_MAX 42000
#define IS31FL3190_CURRENT_SHIFT 2
#define IS31FL3190_CURRENT_MASK GENMASK(4, 2)
#define IS31FL3190_CURRENT_5_mA 0x02
#define IS31FL3190_CURRENT_10_mA 0x01
#define IS31FL3190_CURRENT_17dot5_mA 0x04
#define IS31FL3190_CURRENT_30_mA 0x03
#define IS31FL3190_CURRENT_42_mA 0x00
/* registers for 3196 and 3199 */
#define IS31FL3196_CTRL1 0x01
#define IS31FL3196_CTRL2 0x02
#define IS31FL3196_CONFIG1 0x03
#define IS31FL3196_CONFIG2 0x04
#define IS31FL3196_RAMP_MODE 0x05
#define IS31FL3196_BREATH_MARK 0x06
#define IS31FL3196_PWM(channel) (0x07 + channel)
#define IS31FL3196_DATA_UPDATE 0x10
#define IS31FL3196_T0(channel) (0x11 + channel)
#define IS31FL3196_T123_1 0x1a
#define IS31FL3196_T123_2 0x1b
#define IS31FL3196_T123_3 0x1c
#define IS31FL3196_T4(channel) (0x1d + channel)
#define IS31FL3196_TIME_UPDATE 0x26
#define IS31FL3196_RESET 0xff
#define IS31FL3196_REG_CNT (IS31FL3196_RESET + 1)
#define IS31FL319X_MAX_LEDS 9
/* CS (Current Setting) in CONFIG2 register */
#define IS31FL3196_CONFIG2_CS_SHIFT 4
#define IS31FL3196_CONFIG2_CS_MASK GENMASK(2, 0)
#define IS31FL3196_CONFIG2_CS_STEP_REF 12
#define IS31FL3196_CURRENT_uA_MIN 5000
#define IS31FL3196_CURRENT_uA_MAX 40000
#define IS31FL3196_CURRENT_uA_STEP 5000
#define IS31FL3196_CURRENT_uA_DEFAULT 20000
/* Audio gain in CONFIG2 register */
#define IS31FL3196_AUDIO_GAIN_DB_MAX ((u32)21)
#define IS31FL3196_AUDIO_GAIN_DB_STEP 3
/*
* regmap is used as a cache of chip's register space,
* to avoid reading back brightness values from chip,
* which is known to hang.
*/
struct is31fl319x_chip {
const struct is31fl319x_chipdef *cdef;
struct i2c_client *client;
struct gpio_desc *shutdown_gpio;
struct regmap *regmap;
struct mutex lock;
u32 audio_gain_db;
struct is31fl319x_led {
struct is31fl319x_chip *chip;
struct led_classdev cdev;
u32 max_microamp;
bool configured;
} leds[IS31FL319X_MAX_LEDS];
};
struct is31fl319x_chipdef {
int num_leds;
u8 reset_reg;
const struct regmap_config *is31fl319x_regmap_config;
int (*brightness_set)(struct led_classdev *cdev, enum led_brightness brightness);
u32 current_default;
u32 current_min;
u32 current_max;
bool is_3196or3199;
};
static bool is31fl319x_readable_reg(struct device *dev, unsigned int reg)
{
/* we have no readable registers */
return false;
}
static bool is31fl3190_volatile_reg(struct device *dev, unsigned int reg)
{
/* volatile registers are not cached */
switch (reg) {
case IS31FL3190_DATA_UPDATE:
case IS31FL3190_TIME_UPDATE:
case IS31FL3190_RESET:
return true; /* always write-through */
default:
return false;
}
}
static const struct reg_default is31fl3190_reg_defaults[] = {
{ IS31FL3190_LEDMODE, 0x00 },
{ IS31FL3190_CURRENT, 0x00 },
{ IS31FL3190_PWM(0), 0x00 },
{ IS31FL3190_PWM(1), 0x00 },
{ IS31FL3190_PWM(2), 0x00 },
};
static struct regmap_config is31fl3190_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = IS31FL3190_RESET,
.cache_type = REGCACHE_FLAT,
.readable_reg = is31fl319x_readable_reg,
.volatile_reg = is31fl3190_volatile_reg,
.reg_defaults = is31fl3190_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(is31fl3190_reg_defaults),
};
static bool is31fl3196_volatile_reg(struct device *dev, unsigned int reg)
{
/* volatile registers are not cached */
switch (reg) {
case IS31FL3196_DATA_UPDATE:
case IS31FL3196_TIME_UPDATE:
case IS31FL3196_RESET:
return true; /* always write-through */
default:
return false;
}
}
static const struct reg_default is31fl3196_reg_defaults[] = {
{ IS31FL3196_CONFIG1, 0x00 },
{ IS31FL3196_CONFIG2, 0x00 },
{ IS31FL3196_PWM(0), 0x00 },
{ IS31FL3196_PWM(1), 0x00 },
{ IS31FL3196_PWM(2), 0x00 },
{ IS31FL3196_PWM(3), 0x00 },
{ IS31FL3196_PWM(4), 0x00 },
{ IS31FL3196_PWM(5), 0x00 },
{ IS31FL3196_PWM(6), 0x00 },
{ IS31FL3196_PWM(7), 0x00 },
{ IS31FL3196_PWM(8), 0x00 },
};
static struct regmap_config is31fl3196_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = IS31FL3196_REG_CNT,
.cache_type = REGCACHE_FLAT,
.readable_reg = is31fl319x_readable_reg,
.volatile_reg = is31fl3196_volatile_reg,
.reg_defaults = is31fl3196_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(is31fl3196_reg_defaults),
};
static int is31fl3190_brightness_set(struct led_classdev *cdev,
enum led_brightness brightness)
{
struct is31fl319x_led *led = container_of(cdev, struct is31fl319x_led, cdev);
struct is31fl319x_chip *is31 = led->chip;
int chan = led - is31->leds;
int ret;
int i;
u8 ctrl = 0;
dev_dbg(&is31->client->dev, "channel %d: %d\n", chan, brightness);
mutex_lock(&is31->lock);
/* update PWM register */
ret = regmap_write(is31->regmap, IS31FL3190_PWM(chan), brightness);
if (ret < 0)
goto out;
/* read current brightness of all PWM channels */
for (i = 0; i < is31->cdef->num_leds; i++) {
unsigned int pwm_value;
bool on;
/*
* since neither cdev nor the chip can provide
* the current setting, we read from the regmap cache
*/
ret = regmap_read(is31->regmap, IS31FL3190_PWM(i), &pwm_value);
on = ret >= 0 && pwm_value > LED_OFF;
ctrl |= on << i;
}
if (ctrl > 0) {
dev_dbg(&is31->client->dev, "power up %02x\n", ctrl);
regmap_write(is31->regmap, IS31FL3190_LEDCONTROL, ctrl);
/* update PWMs */
regmap_write(is31->regmap, IS31FL3190_DATA_UPDATE, 0x00);
/* enable chip from shut down and enable all channels */
ret = regmap_write(is31->regmap, IS31FL319X_SHUTDOWN, 0x20);
} else {
dev_dbg(&is31->client->dev, "power down\n");
/* shut down (no need to clear LEDCONTROL) */
ret = regmap_write(is31->regmap, IS31FL319X_SHUTDOWN, 0x01);
}
out:
mutex_unlock(&is31->lock);
return ret;
}
static int is31fl3196_brightness_set(struct led_classdev *cdev,
enum led_brightness brightness)
{
struct is31fl319x_led *led = container_of(cdev, struct is31fl319x_led, cdev);
struct is31fl319x_chip *is31 = led->chip;
int chan = led - is31->leds;
int ret;
int i;
u8 ctrl1 = 0, ctrl2 = 0;
dev_dbg(&is31->client->dev, "channel %d: %d\n", chan, brightness);
mutex_lock(&is31->lock);
/* update PWM register */
ret = regmap_write(is31->regmap, IS31FL3196_PWM(chan), brightness);
if (ret < 0)
goto out;
/* read current brightness of all PWM channels */
for (i = 0; i < is31->cdef->num_leds; i++) {
unsigned int pwm_value;
bool on;
/*
* since neither cdev nor the chip can provide
* the current setting, we read from the regmap cache
*/
ret = regmap_read(is31->regmap, IS31FL3196_PWM(i), &pwm_value);
on = ret >= 0 && pwm_value > LED_OFF;
if (i < 3)
ctrl1 |= on << i; /* 0..2 => bit 0..2 */
else if (i < 6)
ctrl1 |= on << (i + 1); /* 3..5 => bit 4..6 */
else
ctrl2 |= on << (i - 6); /* 6..8 => bit 0..2 */
}
if (ctrl1 > 0 || ctrl2 > 0) {
dev_dbg(&is31->client->dev, "power up %02x %02x\n",
ctrl1, ctrl2);
regmap_write(is31->regmap, IS31FL3196_CTRL1, ctrl1);
regmap_write(is31->regmap, IS31FL3196_CTRL2, ctrl2);
/* update PWMs */
regmap_write(is31->regmap, IS31FL3196_DATA_UPDATE, 0x00);
/* enable chip from shut down */
ret = regmap_write(is31->regmap, IS31FL319X_SHUTDOWN, 0x01);
} else {
dev_dbg(&is31->client->dev, "power down\n");
/* shut down (no need to clear CTRL1/2) */
ret = regmap_write(is31->regmap, IS31FL319X_SHUTDOWN, 0x00);
}
out:
mutex_unlock(&is31->lock);
return ret;
}
static const struct is31fl319x_chipdef is31fl3190_cdef = {
.num_leds = 1,
.reset_reg = IS31FL3190_RESET,
.is31fl319x_regmap_config = &is31fl3190_regmap_config,
.brightness_set = is31fl3190_brightness_set,
.current_default = IS31FL3190_CURRENT_uA_DEFAULT,
.current_min = IS31FL3190_CURRENT_uA_MIN,
.current_max = IS31FL3190_CURRENT_uA_MAX,
.is_3196or3199 = false,
};
static const struct is31fl319x_chipdef is31fl3193_cdef = {
.num_leds = 3,
.reset_reg = IS31FL3190_RESET,
.is31fl319x_regmap_config = &is31fl3190_regmap_config,
.brightness_set = is31fl3190_brightness_set,
.current_default = IS31FL3190_CURRENT_uA_DEFAULT,
.current_min = IS31FL3190_CURRENT_uA_MIN,
.current_max = IS31FL3190_CURRENT_uA_MAX,
.is_3196or3199 = false,
};
static const struct is31fl319x_chipdef is31fl3196_cdef = {
.num_leds = 6,
.reset_reg = IS31FL3196_RESET,
.is31fl319x_regmap_config = &is31fl3196_regmap_config,
.brightness_set = is31fl3196_brightness_set,
.current_default = IS31FL3196_CURRENT_uA_DEFAULT,
.current_min = IS31FL3196_CURRENT_uA_MIN,
.current_max = IS31FL3196_CURRENT_uA_MAX,
.is_3196or3199 = true,
};
static const struct is31fl319x_chipdef is31fl3199_cdef = {
.num_leds = 9,
.reset_reg = IS31FL3196_RESET,
.is31fl319x_regmap_config = &is31fl3196_regmap_config,
.brightness_set = is31fl3196_brightness_set,
.current_default = IS31FL3196_CURRENT_uA_DEFAULT,
.current_min = IS31FL3196_CURRENT_uA_MIN,
.current_max = IS31FL3196_CURRENT_uA_MAX,
.is_3196or3199 = true,
};
static const struct of_device_id of_is31fl319x_match[] = {
{ .compatible = "issi,is31fl3190", .data = &is31fl3190_cdef, },
{ .compatible = "issi,is31fl3191", .data = &is31fl3190_cdef, },
{ .compatible = "issi,is31fl3193", .data = &is31fl3193_cdef, },
{ .compatible = "issi,is31fl3196", .data = &is31fl3196_cdef, },
{ .compatible = "issi,is31fl3199", .data = &is31fl3199_cdef, },
{ .compatible = "si-en,sn3190", .data = &is31fl3190_cdef, },
{ .compatible = "si-en,sn3191", .data = &is31fl3190_cdef, },
{ .compatible = "si-en,sn3193", .data = &is31fl3193_cdef, },
{ .compatible = "si-en,sn3196", .data = &is31fl3196_cdef, },
{ .compatible = "si-en,sn3199", .data = &is31fl3199_cdef, },
{ }
};
MODULE_DEVICE_TABLE(of, of_is31fl319x_match);
static int is31fl319x_parse_child_fw(const struct device *dev,
const struct fwnode_handle *child,
struct is31fl319x_led *led,
struct is31fl319x_chip *is31)
{
struct led_classdev *cdev = &led->cdev;
int ret;
if (fwnode_property_read_string(child, "label", &cdev->name))
cdev->name = fwnode_get_name(child);
ret = fwnode_property_read_string(child, "linux,default-trigger", &cdev->default_trigger);
if (ret < 0 && ret != -EINVAL) /* is optional */
return ret;
led->max_microamp = is31->cdef->current_default;
ret = fwnode_property_read_u32(child, "led-max-microamp", &led->max_microamp);
if (!ret) {
if (led->max_microamp < is31->cdef->current_min)
return -EINVAL; /* not supported */
led->max_microamp = min(led->max_microamp,
is31->cdef->current_max);
}
return 0;
}
static int is31fl319x_parse_fw(struct device *dev, struct is31fl319x_chip *is31)
{
struct fwnode_handle *fwnode = dev_fwnode(dev), *child;
int count;
int ret;
is31->shutdown_gpio = devm_gpiod_get_optional(dev, "shutdown", GPIOD_OUT_HIGH);
if (IS_ERR(is31->shutdown_gpio))
return dev_err_probe(dev, PTR_ERR(is31->shutdown_gpio),
"Failed to get shutdown gpio\n");
is31->cdef = device_get_match_data(dev);
count = 0;
fwnode_for_each_available_child_node(fwnode, child)
count++;
dev_dbg(dev, "probing with %d leds defined in DT\n", count);
if (!count || count > is31->cdef->num_leds)
return dev_err_probe(dev, -ENODEV,
"Number of leds defined must be between 1 and %u\n",
is31->cdef->num_leds);
fwnode_for_each_available_child_node(fwnode, child) {
struct is31fl319x_led *led;
u32 reg;
ret = fwnode_property_read_u32(child, "reg", ®);
if (ret) {
ret = dev_err_probe(dev, ret, "Failed to read led 'reg' property\n");
goto put_child_node;
}
if (reg < 1 || reg > is31->cdef->num_leds) {
ret = dev_err_probe(dev, -EINVAL, "invalid led reg %u\n", reg);
goto put_child_node;
}
led = &is31->leds[reg - 1];
if (led->configured) {
ret = dev_err_probe(dev, -EINVAL, "led %u is already configured\n", reg);
goto put_child_node;
}
ret = is31fl319x_parse_child_fw(dev, child, led, is31);
if (ret) {
ret = dev_err_probe(dev, ret, "led %u DT parsing failed\n", reg);
goto put_child_node;
}
led->configured = true;
}
is31->audio_gain_db = 0;
if (is31->cdef->is_3196or3199) {
ret = fwnode_property_read_u32(fwnode, "audio-gain-db", &is31->audio_gain_db);
if (!ret)
is31->audio_gain_db = min(is31->audio_gain_db,
IS31FL3196_AUDIO_GAIN_DB_MAX);
}
return 0;
put_child_node:
fwnode_handle_put(child);
return ret;
}
static inline int is31fl3190_microamp_to_cs(struct device *dev, u32 microamp)
{
switch (microamp) {
case 5000:
return IS31FL3190_CURRENT_5_mA;
case 10000:
return IS31FL3190_CURRENT_10_mA;
case 17500:
return IS31FL3190_CURRENT_17dot5_mA;
case 30000:
return IS31FL3190_CURRENT_30_mA;
case 42000:
return IS31FL3190_CURRENT_42_mA;
default:
dev_warn(dev, "Unsupported current value: %d, using 5000 µA!\n", microamp);
return IS31FL3190_CURRENT_5_mA;
}
}
static inline int is31fl3196_microamp_to_cs(struct device *dev, u32 microamp)
{
/* round down to nearest supported value (range check done by caller) */
u32 step = microamp / IS31FL3196_CURRENT_uA_STEP;
return ((IS31FL3196_CONFIG2_CS_STEP_REF - step) &
IS31FL3196_CONFIG2_CS_MASK) <<
IS31FL3196_CONFIG2_CS_SHIFT; /* CS encoding */
}
static inline int is31fl3196_db_to_gain(u32 dezibel)
{
/* round down to nearest supported value (range check done by caller) */
return dezibel / IS31FL3196_AUDIO_GAIN_DB_STEP;
}
static void is31f1319x_mutex_destroy(void *lock)
{
mutex_destroy(lock);
}
static int is31fl319x_probe(struct i2c_client *client)
{
struct is31fl319x_chip *is31;
struct device *dev = &client->dev;
int err;
int i = 0;
u32 aggregated_led_microamp;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
return -EIO;
is31 = devm_kzalloc(&client->dev, sizeof(*is31), GFP_KERNEL);
if (!is31)
return -ENOMEM;
mutex_init(&is31->lock);
err = devm_add_action_or_reset(dev, is31f1319x_mutex_destroy, &is31->lock);
if (err)
return err;
err = is31fl319x_parse_fw(&client->dev, is31);
if (err)
return err;
if (is31->shutdown_gpio) {
gpiod_direction_output(is31->shutdown_gpio, 0);
mdelay(5);
gpiod_direction_output(is31->shutdown_gpio, 1);
}
is31->client = client;
is31->regmap = devm_regmap_init_i2c(client, is31->cdef->is31fl319x_regmap_config);
if (IS_ERR(is31->regmap))
return dev_err_probe(dev, PTR_ERR(is31->regmap), "failed to allocate register map\n");
i2c_set_clientdata(client, is31);
/* check for write-reply from chip (we can't read any registers) */
err = regmap_write(is31->regmap, is31->cdef->reset_reg, 0x00);
if (err < 0)
return dev_err_probe(dev, err, "no response from chip write\n");
/*
* Kernel conventions require per-LED led-max-microamp property.
* But the chip does not allow to limit individual LEDs.
* So we take minimum from all subnodes for safety of hardware.
*/
aggregated_led_microamp = is31->cdef->current_max;
for (i = 0; i < is31->cdef->num_leds; i++)
if (is31->leds[i].configured &&
is31->leds[i].max_microamp < aggregated_led_microamp)
aggregated_led_microamp = is31->leds[i].max_microamp;
if (is31->cdef->is_3196or3199)
regmap_write(is31->regmap, IS31FL3196_CONFIG2,
is31fl3196_microamp_to_cs(dev, aggregated_led_microamp) |
is31fl3196_db_to_gain(is31->audio_gain_db));
else
regmap_update_bits(is31->regmap, IS31FL3190_CURRENT, IS31FL3190_CURRENT_MASK,
is31fl3190_microamp_to_cs(dev, aggregated_led_microamp) << IS31FL3190_CURRENT_SHIFT);
for (i = 0; i < is31->cdef->num_leds; i++) {
struct is31fl319x_led *led = &is31->leds[i];
if (!led->configured)
continue;
led->chip = is31;
led->cdev.brightness_set_blocking = is31->cdef->brightness_set;
err = devm_led_classdev_register(&client->dev, &led->cdev);
if (err < 0)
return err;
}
return 0;
}
/*
* i2c-core (and modalias) requires that id_table be properly filled,
* even though it is not used for DeviceTree based instantiation.
*/
static const struct i2c_device_id is31fl319x_id[] = {
{ "is31fl3190" },
{ "is31fl3191" },
{ "is31fl3193" },
{ "is31fl3196" },
{ "is31fl3199" },
{ "sn3190" },
{ "sn3191" },
{ "sn3193" },
{ "sn3196" },
{ "sn3199" },
{},
};
MODULE_DEVICE_TABLE(i2c, is31fl319x_id);
static struct i2c_driver is31fl319x_driver = {
.driver = {
.name = "leds-is31fl319x",
.of_match_table = of_is31fl319x_match,
},
.probe = is31fl319x_probe,
.id_table = is31fl319x_id,
};
module_i2c_driver(is31fl319x_driver);
MODULE_AUTHOR("H. Nikolaus Schaller <[email protected]>");
MODULE_AUTHOR("Andrey Utkin <[email protected]>");
MODULE_DESCRIPTION("IS31FL319X LED driver");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/leds-is31fl319x.c |
// SPDX-License-Identifier: GPL-2.0
/*
* Awinic AW20036/AW20054/AW20072 LED driver
*
* Copyright (c) 2023, SberDevices. All Rights Reserved.
*
* Author: Martin Kurbanov <[email protected]>
*/
#include <linux/bitfield.h>
#include <linux/bits.h>
#include <linux/container_of.h>
#include <linux/i2c.h>
#include <linux/leds.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/regmap.h>
#include <linux/time.h>
#include <linux/units.h>
#define AW200XX_DIM_MAX (BIT(6) - 1)
#define AW200XX_FADE_MAX (BIT(8) - 1)
#define AW200XX_IMAX_DEFAULT_uA 60000
#define AW200XX_IMAX_MAX_uA 160000
#define AW200XX_IMAX_MIN_uA 3300
/* Page 0 */
#define AW200XX_REG_PAGE0_BASE 0xc000
/* Select page register */
#define AW200XX_REG_PAGE 0xF0
#define AW200XX_PAGE_MASK (GENMASK(7, 6) | GENMASK(2, 0))
#define AW200XX_PAGE_SHIFT 0
#define AW200XX_NUM_PAGES 6
#define AW200XX_PAGE_SIZE 256
#define AW200XX_REG(page, reg) \
(AW200XX_REG_PAGE0_BASE + (page) * AW200XX_PAGE_SIZE + (reg))
#define AW200XX_REG_MAX \
AW200XX_REG(AW200XX_NUM_PAGES - 1, AW200XX_PAGE_SIZE - 1)
#define AW200XX_PAGE0 0
#define AW200XX_PAGE1 1
#define AW200XX_PAGE2 2
#define AW200XX_PAGE3 3
#define AW200XX_PAGE4 4
#define AW200XX_PAGE5 5
/* Chip ID register */
#define AW200XX_REG_IDR AW200XX_REG(AW200XX_PAGE0, 0x00)
#define AW200XX_IDR_CHIPID 0x18
/* Sleep mode register */
#define AW200XX_REG_SLPCR AW200XX_REG(AW200XX_PAGE0, 0x01)
#define AW200XX_SLPCR_ACTIVE 0x00
/* Reset register */
#define AW200XX_REG_RSTR AW200XX_REG(AW200XX_PAGE0, 0x02)
#define AW200XX_RSTR_RESET 0x01
/* Global current configuration register */
#define AW200XX_REG_GCCR AW200XX_REG(AW200XX_PAGE0, 0x03)
#define AW200XX_GCCR_IMAX_MASK GENMASK(7, 4)
#define AW200XX_GCCR_IMAX(x) ((x) << 4)
#define AW200XX_GCCR_ALLON BIT(3)
/* Fast clear display control register */
#define AW200XX_REG_FCD AW200XX_REG(AW200XX_PAGE0, 0x04)
#define AW200XX_FCD_CLEAR 0x01
/* Display size configuration */
#define AW200XX_REG_DSIZE AW200XX_REG(AW200XX_PAGE0, 0x80)
#define AW200XX_DSIZE_COLUMNS_MAX 12
#define AW200XX_LED2REG(x, columns) \
((x) + (((x) / (columns)) * (AW200XX_DSIZE_COLUMNS_MAX - (columns))))
/*
* DIM current configuration register (page 4).
* The even address for current DIM configuration.
* The odd address for current FADE configuration
*/
#define AW200XX_REG_DIM(x, columns) \
AW200XX_REG(AW200XX_PAGE4, AW200XX_LED2REG(x, columns) * 2)
#define AW200XX_REG_DIM2FADE(x) ((x) + 1)
/*
* Duty ratio of display scan (see p.15 of datasheet for formula):
* duty = (592us / 600.5us) * (1 / (display_rows + 1))
*
* Multiply to 1000 (MILLI) to improve the accuracy of calculations.
*/
#define AW200XX_DUTY_RATIO(rows) \
(((592UL * USEC_PER_SEC) / 600500UL) * (MILLI / (rows)) / MILLI)
struct aw200xx_chipdef {
u32 channels;
u32 display_size_rows_max;
u32 display_size_columns;
};
struct aw200xx_led {
struct led_classdev cdev;
struct aw200xx *chip;
int dim;
u32 num;
};
struct aw200xx {
const struct aw200xx_chipdef *cdef;
struct i2c_client *client;
struct regmap *regmap;
struct mutex mutex;
u32 num_leds;
u32 display_rows;
struct aw200xx_led leds[];
};
static ssize_t dim_show(struct device *dev, struct device_attribute *devattr,
char *buf)
{
struct led_classdev *cdev = dev_get_drvdata(dev);
struct aw200xx_led *led = container_of(cdev, struct aw200xx_led, cdev);
int dim = led->dim;
if (dim < 0)
return sysfs_emit(buf, "auto\n");
return sysfs_emit(buf, "%d\n", dim);
}
static ssize_t dim_store(struct device *dev, struct device_attribute *devattr,
const char *buf, size_t count)
{
struct led_classdev *cdev = dev_get_drvdata(dev);
struct aw200xx_led *led = container_of(cdev, struct aw200xx_led, cdev);
struct aw200xx *chip = led->chip;
u32 columns = chip->cdef->display_size_columns;
int dim;
ssize_t ret;
if (sysfs_streq(buf, "auto")) {
dim = -1;
} else {
ret = kstrtoint(buf, 0, &dim);
if (ret)
return ret;
if (dim > AW200XX_DIM_MAX)
return -EINVAL;
}
mutex_lock(&chip->mutex);
if (dim >= 0) {
ret = regmap_write(chip->regmap,
AW200XX_REG_DIM(led->num, columns), dim);
if (ret)
goto out_unlock;
}
led->dim = dim;
ret = count;
out_unlock:
mutex_unlock(&chip->mutex);
return ret;
}
static DEVICE_ATTR_RW(dim);
static struct attribute *dim_attrs[] = {
&dev_attr_dim.attr,
NULL
};
ATTRIBUTE_GROUPS(dim);
static int aw200xx_brightness_set(struct led_classdev *cdev,
enum led_brightness brightness)
{
struct aw200xx_led *led = container_of(cdev, struct aw200xx_led, cdev);
struct aw200xx *chip = led->chip;
int dim;
u32 reg;
int ret;
mutex_lock(&chip->mutex);
reg = AW200XX_REG_DIM(led->num, chip->cdef->display_size_columns);
dim = led->dim;
if (dim < 0)
dim = max_t(int,
brightness / (AW200XX_FADE_MAX / AW200XX_DIM_MAX),
1);
ret = regmap_write(chip->regmap, reg, dim);
if (ret)
goto out_unlock;
ret = regmap_write(chip->regmap,
AW200XX_REG_DIM2FADE(reg), brightness);
out_unlock:
mutex_unlock(&chip->mutex);
return ret;
}
static u32 aw200xx_imax_from_global(const struct aw200xx *const chip,
u32 global_imax_uA)
{
u64 led_imax_uA;
/*
* The output current of each LED (see p.14 of datasheet for formula):
* Iled = Imax * (dim / 63) * ((fade + 1) / 256) * duty
*
* The value of duty is determined by the following formula:
* duty = (592us / 600.5us) * (1 / (display_rows + 1))
*
* Calculated for the maximum values of fade and dim.
* We divide by 1000 because we earlier multiplied by 1000 to improve
* accuracy when calculating the duty.
*/
led_imax_uA = global_imax_uA * AW200XX_DUTY_RATIO(chip->display_rows);
do_div(led_imax_uA, MILLI);
return led_imax_uA;
}
static u32 aw200xx_imax_to_global(const struct aw200xx *const chip,
u32 led_imax_uA)
{
u32 duty = AW200XX_DUTY_RATIO(chip->display_rows);
/* The output current of each LED (see p.14 of datasheet for formula) */
return (led_imax_uA * 1000U) / duty;
}
#define AW200XX_IMAX_MULTIPLIER1 10000
#define AW200XX_IMAX_MULTIPLIER2 3333
#define AW200XX_IMAX_BASE_VAL1 0
#define AW200XX_IMAX_BASE_VAL2 8
/*
* The AW200XX has a 4-bit register (GCCR) to configure the global current,
* which ranges from 3.3mA to 160mA. The following table indicates the values
* of the global current, divided into two parts:
*
* +-----------+-----------------+-----------+-----------------+
* | reg value | global max (mA) | reg value | global max (mA) |
* +-----------+-----------------+-----------+-----------------+
* | 0 | 10 | 8 | 3.3 |
* | 1 | 20 | 9 | 6.7 |
* | 2 | 30 | 10 | 10 |
* | 3 | 40 | 11 | 13.3 |
* | 4 | 60 | 12 | 20 |
* | 5 | 80 | 13 | 26.7 |
* | 6 | 120 | 14 | 40 |
* | 7 | 160 | 15 | 53.3 |
* +-----------+-----------------+-----------+-----------------+
*
* The left part with a multiplier of 10, and the right part with a multiplier
* of 3.3.
* So we have two formulas to calculate the global current:
* for the left part of the table:
* imax = coefficient * 10
*
* for the right part of the table:
* imax = coefficient * 3.3
*
* The coefficient table consists of the following values:
* 1, 2, 3, 4, 6, 8, 12, 16.
*/
static int aw200xx_set_imax(const struct aw200xx *const chip,
u32 led_imax_uA)
{
u32 g_imax_uA = aw200xx_imax_to_global(chip, led_imax_uA);
u32 coeff_table[] = {1, 2, 3, 4, 6, 8, 12, 16};
u32 gccr_imax = UINT_MAX;
u32 cur_imax = 0;
int i;
for (i = 0; i < ARRAY_SIZE(coeff_table); i++) {
u32 imax;
/* select closest ones */
imax = coeff_table[i] * AW200XX_IMAX_MULTIPLIER1;
if (g_imax_uA >= imax && imax > cur_imax) {
cur_imax = imax;
gccr_imax = i + AW200XX_IMAX_BASE_VAL1;
}
imax = coeff_table[i] * AW200XX_IMAX_MULTIPLIER2;
imax = DIV_ROUND_CLOSEST(imax, 100) * 100;
if (g_imax_uA >= imax && imax > cur_imax) {
cur_imax = imax;
gccr_imax = i + AW200XX_IMAX_BASE_VAL2;
}
}
if (gccr_imax == UINT_MAX)
return -EINVAL;
return regmap_update_bits(chip->regmap, AW200XX_REG_GCCR,
AW200XX_GCCR_IMAX_MASK,
AW200XX_GCCR_IMAX(gccr_imax));
}
static int aw200xx_chip_reset(const struct aw200xx *const chip)
{
int ret;
ret = regmap_write(chip->regmap, AW200XX_REG_RSTR, AW200XX_RSTR_RESET);
if (ret)
return ret;
regcache_mark_dirty(chip->regmap);
return regmap_write(chip->regmap, AW200XX_REG_FCD, AW200XX_FCD_CLEAR);
}
static int aw200xx_chip_init(const struct aw200xx *const chip)
{
int ret;
ret = regmap_write(chip->regmap, AW200XX_REG_DSIZE,
chip->display_rows - 1);
if (ret)
return ret;
ret = regmap_write(chip->regmap, AW200XX_REG_SLPCR,
AW200XX_SLPCR_ACTIVE);
if (ret)
return ret;
return regmap_update_bits(chip->regmap, AW200XX_REG_GCCR,
AW200XX_GCCR_ALLON, AW200XX_GCCR_ALLON);
}
static int aw200xx_chip_check(const struct aw200xx *const chip)
{
struct device *dev = &chip->client->dev;
u32 chipid;
int ret;
ret = regmap_read(chip->regmap, AW200XX_REG_IDR, &chipid);
if (ret)
return dev_err_probe(dev, ret, "Failed to read chip ID\n");
if (chipid != AW200XX_IDR_CHIPID)
return dev_err_probe(dev, -ENODEV,
"Chip reported wrong ID: %x\n", chipid);
return 0;
}
static int aw200xx_probe_fw(struct device *dev, struct aw200xx *chip)
{
struct fwnode_handle *child;
u32 current_min, current_max, min_uA;
int ret;
int i;
ret = device_property_read_u32(dev, "awinic,display-rows",
&chip->display_rows);
if (ret)
return dev_err_probe(dev, ret,
"Failed to read 'display-rows' property\n");
if (!chip->display_rows ||
chip->display_rows > chip->cdef->display_size_rows_max) {
return dev_err_probe(dev, -EINVAL,
"Invalid leds display size %u\n",
chip->display_rows);
}
current_max = aw200xx_imax_from_global(chip, AW200XX_IMAX_MAX_uA);
current_min = aw200xx_imax_from_global(chip, AW200XX_IMAX_MIN_uA);
min_uA = UINT_MAX;
i = 0;
device_for_each_child_node(dev, child) {
struct led_init_data init_data = {};
struct aw200xx_led *led;
u32 source, imax;
ret = fwnode_property_read_u32(child, "reg", &source);
if (ret) {
dev_err(dev, "Missing reg property\n");
chip->num_leds--;
continue;
}
if (source >= chip->cdef->channels) {
dev_err(dev, "LED reg %u out of range (max %u)\n",
source, chip->cdef->channels);
chip->num_leds--;
continue;
}
ret = fwnode_property_read_u32(child, "led-max-microamp",
&imax);
if (ret) {
dev_info(&chip->client->dev,
"DT property led-max-microamp is missing\n");
} else if (imax < current_min || imax > current_max) {
dev_err(dev, "Invalid value %u for led-max-microamp\n",
imax);
chip->num_leds--;
continue;
} else {
min_uA = min(min_uA, imax);
}
led = &chip->leds[i];
led->dim = -1;
led->num = source;
led->chip = chip;
led->cdev.brightness_set_blocking = aw200xx_brightness_set;
led->cdev.groups = dim_groups;
init_data.fwnode = child;
ret = devm_led_classdev_register_ext(dev, &led->cdev,
&init_data);
if (ret) {
fwnode_handle_put(child);
break;
}
i++;
}
if (!chip->num_leds)
return -EINVAL;
if (min_uA == UINT_MAX) {
min_uA = aw200xx_imax_from_global(chip,
AW200XX_IMAX_DEFAULT_uA);
}
return aw200xx_set_imax(chip, min_uA);
}
static const struct regmap_range_cfg aw200xx_ranges[] = {
{
.name = "aw200xx",
.range_min = 0,
.range_max = AW200XX_REG_MAX,
.selector_reg = AW200XX_REG_PAGE,
.selector_mask = AW200XX_PAGE_MASK,
.selector_shift = AW200XX_PAGE_SHIFT,
.window_start = 0,
.window_len = AW200XX_PAGE_SIZE,
},
};
static const struct regmap_range aw200xx_writeonly_ranges[] = {
regmap_reg_range(AW200XX_REG(AW200XX_PAGE1, 0x00), AW200XX_REG_MAX),
};
static const struct regmap_access_table aw200xx_readable_table = {
.no_ranges = aw200xx_writeonly_ranges,
.n_no_ranges = ARRAY_SIZE(aw200xx_writeonly_ranges),
};
static const struct regmap_range aw200xx_readonly_ranges[] = {
regmap_reg_range(AW200XX_REG_IDR, AW200XX_REG_IDR),
};
static const struct regmap_access_table aw200xx_writeable_table = {
.no_ranges = aw200xx_readonly_ranges,
.n_no_ranges = ARRAY_SIZE(aw200xx_readonly_ranges),
};
static const struct regmap_config aw200xx_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = AW200XX_REG_MAX,
.ranges = aw200xx_ranges,
.num_ranges = ARRAY_SIZE(aw200xx_ranges),
.rd_table = &aw200xx_readable_table,
.wr_table = &aw200xx_writeable_table,
.cache_type = REGCACHE_RBTREE,
};
static int aw200xx_probe(struct i2c_client *client)
{
const struct aw200xx_chipdef *cdef;
struct aw200xx *chip;
int count;
int ret;
cdef = device_get_match_data(&client->dev);
if (!cdef)
return -ENODEV;
count = device_get_child_node_count(&client->dev);
if (!count || count > cdef->channels)
return dev_err_probe(&client->dev, -EINVAL,
"Incorrect number of leds (%d)", count);
chip = devm_kzalloc(&client->dev, struct_size(chip, leds, count),
GFP_KERNEL);
if (!chip)
return -ENOMEM;
chip->cdef = cdef;
chip->num_leds = count;
chip->client = client;
i2c_set_clientdata(client, chip);
chip->regmap = devm_regmap_init_i2c(client, &aw200xx_regmap_config);
if (IS_ERR(chip->regmap))
return PTR_ERR(chip->regmap);
ret = aw200xx_chip_check(chip);
if (ret)
return ret;
mutex_init(&chip->mutex);
/* Need a lock now since after call aw200xx_probe_fw, sysfs nodes created */
mutex_lock(&chip->mutex);
ret = aw200xx_chip_reset(chip);
if (ret)
goto out_unlock;
ret = aw200xx_probe_fw(&client->dev, chip);
if (ret)
goto out_unlock;
ret = aw200xx_chip_init(chip);
out_unlock:
mutex_unlock(&chip->mutex);
return ret;
}
static void aw200xx_remove(struct i2c_client *client)
{
struct aw200xx *chip = i2c_get_clientdata(client);
aw200xx_chip_reset(chip);
mutex_destroy(&chip->mutex);
}
static const struct aw200xx_chipdef aw20036_cdef = {
.channels = 36,
.display_size_rows_max = 3,
.display_size_columns = 12,
};
static const struct aw200xx_chipdef aw20054_cdef = {
.channels = 54,
.display_size_rows_max = 6,
.display_size_columns = 9,
};
static const struct aw200xx_chipdef aw20072_cdef = {
.channels = 72,
.display_size_rows_max = 6,
.display_size_columns = 12,
};
static const struct i2c_device_id aw200xx_id[] = {
{ "aw20036" },
{ "aw20054" },
{ "aw20072" },
{}
};
MODULE_DEVICE_TABLE(i2c, aw200xx_id);
static const struct of_device_id aw200xx_match_table[] = {
{ .compatible = "awinic,aw20036", .data = &aw20036_cdef, },
{ .compatible = "awinic,aw20054", .data = &aw20054_cdef, },
{ .compatible = "awinic,aw20072", .data = &aw20072_cdef, },
{}
};
MODULE_DEVICE_TABLE(of, aw200xx_match_table);
static struct i2c_driver aw200xx_driver = {
.driver = {
.name = "aw200xx",
.of_match_table = aw200xx_match_table,
},
.probe = aw200xx_probe,
.remove = aw200xx_remove,
.id_table = aw200xx_id,
};
module_i2c_driver(aw200xx_driver);
MODULE_AUTHOR("Martin Kurbanov <[email protected]>");
MODULE_DESCRIPTION("AW200XX LED driver");
MODULE_LICENSE("GPL");
| linux-master | drivers/leds/leds-aw200xx.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* LEDs driver for the "User LED" on Routerboard532
*
* Copyright (C) 2009 Phil Sutter <[email protected]>
*
* Based on leds-cobalt-qube.c by Florian Fainelly and
* rb-diag.c (my own standalone driver for both LED and
* button of Routerboard532).
*/
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <asm/mach-rc32434/gpio.h>
#include <asm/mach-rc32434/rb.h>
static void rb532_led_set(struct led_classdev *cdev,
enum led_brightness brightness)
{
if (brightness)
set_latch_u5(LO_ULED, 0);
else
set_latch_u5(0, LO_ULED);
}
static enum led_brightness rb532_led_get(struct led_classdev *cdev)
{
return (get_latch_u5() & LO_ULED) ? LED_FULL : LED_OFF;
}
static struct led_classdev rb532_uled = {
.name = "uled",
.brightness_set = rb532_led_set,
.brightness_get = rb532_led_get,
.default_trigger = "nand-disk",
};
static int rb532_led_probe(struct platform_device *pdev)
{
return led_classdev_register(&pdev->dev, &rb532_uled);
}
static int rb532_led_remove(struct platform_device *pdev)
{
led_classdev_unregister(&rb532_uled);
return 0;
}
static struct platform_driver rb532_led_driver = {
.probe = rb532_led_probe,
.remove = rb532_led_remove,
.driver = {
.name = "rb532-led",
},
};
module_platform_driver(rb532_led_driver);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("User LED support for Routerboard532");
MODULE_AUTHOR("Phil Sutter <[email protected]>");
MODULE_ALIAS("platform:rb532-led");
| linux-master | drivers/leds/leds-rb532.c |
// SPDX-License-Identifier: GPL-2.0
// TI LM36274 LED chip family driver
// Copyright (C) 2019 Texas Instruments Incorporated - https://www.ti.com/
#include <linux/bitops.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/leds.h>
#include <linux/leds-ti-lmu-common.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/property.h>
#include <linux/mfd/ti-lmu.h>
#include <linux/mfd/ti-lmu-register.h>
#include <uapi/linux/uleds.h>
#define LM36274_MAX_STRINGS 4
#define LM36274_BL_EN BIT(4)
/**
* struct lm36274
* @pdev: platform device
* @led_dev: led class device
* @lmu_data: Register and setting values for common code
* @regmap: Devices register map
* @dev: Pointer to the devices device struct
* @led_sources: The LED strings supported in this array
* @num_leds: Number of LED strings are supported in this array
*/
struct lm36274 {
struct platform_device *pdev;
struct led_classdev led_dev;
struct ti_lmu_bank lmu_data;
struct regmap *regmap;
struct device *dev;
u32 led_sources[LM36274_MAX_STRINGS];
int num_leds;
};
static int lm36274_brightness_set(struct led_classdev *led_cdev,
enum led_brightness brt_val)
{
struct lm36274 *chip = container_of(led_cdev, struct lm36274, led_dev);
return ti_lmu_common_set_brightness(&chip->lmu_data, brt_val);
}
static int lm36274_init(struct lm36274 *chip)
{
int enable_val = 0;
int i;
for (i = 0; i < chip->num_leds; i++)
enable_val |= (1 << chip->led_sources[i]);
if (!enable_val) {
dev_err(chip->dev, "No LEDs were enabled\n");
return -EINVAL;
}
enable_val |= LM36274_BL_EN;
return regmap_write(chip->regmap, LM36274_REG_BL_EN, enable_val);
}
static int lm36274_parse_dt(struct lm36274 *chip,
struct led_init_data *init_data)
{
struct device *dev = chip->dev;
struct fwnode_handle *child;
int ret;
/* There should only be 1 node */
if (device_get_child_node_count(dev) != 1)
return -EINVAL;
child = device_get_next_child_node(dev, NULL);
init_data->fwnode = child;
init_data->devicename = chip->pdev->name;
/* for backwards compatibility when `label` property is not present */
init_data->default_label = ":";
chip->num_leds = fwnode_property_count_u32(child, "led-sources");
if (chip->num_leds <= 0) {
ret = -ENODEV;
goto err;
}
ret = fwnode_property_read_u32_array(child, "led-sources",
chip->led_sources, chip->num_leds);
if (ret) {
dev_err(dev, "led-sources property missing\n");
goto err;
}
return 0;
err:
fwnode_handle_put(child);
return ret;
}
static int lm36274_probe(struct platform_device *pdev)
{
struct ti_lmu *lmu = dev_get_drvdata(pdev->dev.parent);
struct led_init_data init_data = {};
struct lm36274 *chip;
int ret;
chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);
if (!chip)
return -ENOMEM;
chip->pdev = pdev;
chip->dev = &pdev->dev;
chip->regmap = lmu->regmap;
platform_set_drvdata(pdev, chip);
ret = lm36274_parse_dt(chip, &init_data);
if (ret) {
dev_err(chip->dev, "Failed to parse DT node\n");
return ret;
}
ret = lm36274_init(chip);
if (ret) {
fwnode_handle_put(init_data.fwnode);
dev_err(chip->dev, "Failed to init the device\n");
return ret;
}
chip->lmu_data.regmap = chip->regmap;
chip->lmu_data.max_brightness = MAX_BRIGHTNESS_11BIT;
chip->lmu_data.msb_brightness_reg = LM36274_REG_BRT_MSB;
chip->lmu_data.lsb_brightness_reg = LM36274_REG_BRT_LSB;
chip->led_dev.max_brightness = MAX_BRIGHTNESS_11BIT;
chip->led_dev.brightness_set_blocking = lm36274_brightness_set;
ret = devm_led_classdev_register_ext(chip->dev, &chip->led_dev,
&init_data);
if (ret)
dev_err(chip->dev, "Failed to register LED for node %pfw\n",
init_data.fwnode);
fwnode_handle_put(init_data.fwnode);
return ret;
}
static const struct of_device_id of_lm36274_leds_match[] = {
{ .compatible = "ti,lm36274-backlight", },
{},
};
MODULE_DEVICE_TABLE(of, of_lm36274_leds_match);
static struct platform_driver lm36274_driver = {
.probe = lm36274_probe,
.driver = {
.name = "lm36274-leds",
.of_match_table = of_lm36274_leds_match,
},
};
module_platform_driver(lm36274_driver)
MODULE_DESCRIPTION("Texas Instruments LM36274 LED driver");
MODULE_AUTHOR("Dan Murphy <[email protected]>");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/leds-lm36274.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* LED driver for WM831x status LEDs
*
* Copyright(C) 2009 Wolfson Microelectronics PLC.
*/
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/leds.h>
#include <linux/err.h>
#include <linux/mfd/wm831x/core.h>
#include <linux/mfd/wm831x/pdata.h>
#include <linux/mfd/wm831x/status.h>
#include <linux/module.h>
struct wm831x_status {
struct led_classdev cdev;
struct wm831x *wm831x;
struct mutex mutex;
spinlock_t value_lock;
int reg; /* Control register */
int reg_val; /* Control register value */
int blink;
int blink_time;
int blink_cyc;
int src;
enum led_brightness brightness;
};
#define to_wm831x_status(led_cdev) \
container_of(led_cdev, struct wm831x_status, cdev)
static void wm831x_status_set(struct wm831x_status *led)
{
unsigned long flags;
mutex_lock(&led->mutex);
led->reg_val &= ~(WM831X_LED_SRC_MASK | WM831X_LED_MODE_MASK |
WM831X_LED_DUTY_CYC_MASK | WM831X_LED_DUR_MASK);
spin_lock_irqsave(&led->value_lock, flags);
led->reg_val |= led->src << WM831X_LED_SRC_SHIFT;
if (led->blink) {
led->reg_val |= 2 << WM831X_LED_MODE_SHIFT;
led->reg_val |= led->blink_time << WM831X_LED_DUR_SHIFT;
led->reg_val |= led->blink_cyc;
} else {
if (led->brightness != LED_OFF)
led->reg_val |= 1 << WM831X_LED_MODE_SHIFT;
}
spin_unlock_irqrestore(&led->value_lock, flags);
wm831x_reg_write(led->wm831x, led->reg, led->reg_val);
mutex_unlock(&led->mutex);
}
static int wm831x_status_brightness_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
struct wm831x_status *led = to_wm831x_status(led_cdev);
unsigned long flags;
spin_lock_irqsave(&led->value_lock, flags);
led->brightness = value;
if (value == LED_OFF)
led->blink = 0;
spin_unlock_irqrestore(&led->value_lock, flags);
wm831x_status_set(led);
return 0;
}
static int wm831x_status_blink_set(struct led_classdev *led_cdev,
unsigned long *delay_on,
unsigned long *delay_off)
{
struct wm831x_status *led = to_wm831x_status(led_cdev);
unsigned long flags;
int ret = 0;
/* Pick some defaults if we've not been given times */
if (*delay_on == 0 && *delay_off == 0) {
*delay_on = 250;
*delay_off = 250;
}
spin_lock_irqsave(&led->value_lock, flags);
/* We only have a limited selection of settings, see if we can
* support the configuration we're being given */
switch (*delay_on) {
case 1000:
led->blink_time = 0;
break;
case 250:
led->blink_time = 1;
break;
case 125:
led->blink_time = 2;
break;
case 62:
case 63:
/* Actually 62.5ms */
led->blink_time = 3;
break;
default:
ret = -EINVAL;
break;
}
if (ret == 0) {
switch (*delay_off / *delay_on) {
case 1:
led->blink_cyc = 0;
break;
case 3:
led->blink_cyc = 1;
break;
case 4:
led->blink_cyc = 2;
break;
case 8:
led->blink_cyc = 3;
break;
default:
ret = -EINVAL;
break;
}
}
if (ret == 0)
led->blink = 1;
else
led->blink = 0;
spin_unlock_irqrestore(&led->value_lock, flags);
wm831x_status_set(led);
return ret;
}
static const char * const led_src_texts[] = {
"otp",
"power",
"charger",
"soft",
};
static ssize_t src_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct wm831x_status *led = to_wm831x_status(led_cdev);
int i;
ssize_t ret = 0;
mutex_lock(&led->mutex);
for (i = 0; i < ARRAY_SIZE(led_src_texts); i++)
if (i == led->src)
ret += sprintf(&buf[ret], "[%s] ", led_src_texts[i]);
else
ret += sprintf(&buf[ret], "%s ", led_src_texts[i]);
mutex_unlock(&led->mutex);
ret += sprintf(&buf[ret], "\n");
return ret;
}
static ssize_t src_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct wm831x_status *led = to_wm831x_status(led_cdev);
int i;
i = sysfs_match_string(led_src_texts, buf);
if (i >= 0) {
mutex_lock(&led->mutex);
led->src = i;
mutex_unlock(&led->mutex);
wm831x_status_set(led);
}
return size;
}
static DEVICE_ATTR_RW(src);
static struct attribute *wm831x_status_attrs[] = {
&dev_attr_src.attr,
NULL
};
ATTRIBUTE_GROUPS(wm831x_status);
static int wm831x_status_probe(struct platform_device *pdev)
{
struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
struct wm831x_pdata *chip_pdata;
struct wm831x_status_pdata pdata;
struct wm831x_status *drvdata;
struct resource *res;
int id = pdev->id % ARRAY_SIZE(chip_pdata->status);
int ret;
res = platform_get_resource(pdev, IORESOURCE_REG, 0);
if (res == NULL) {
dev_err(&pdev->dev, "No register resource\n");
return -EINVAL;
}
drvdata = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_status),
GFP_KERNEL);
if (!drvdata)
return -ENOMEM;
drvdata->wm831x = wm831x;
drvdata->reg = res->start;
if (dev_get_platdata(wm831x->dev))
chip_pdata = dev_get_platdata(wm831x->dev);
else
chip_pdata = NULL;
memset(&pdata, 0, sizeof(pdata));
if (chip_pdata && chip_pdata->status[id])
memcpy(&pdata, chip_pdata->status[id], sizeof(pdata));
else
pdata.name = dev_name(&pdev->dev);
mutex_init(&drvdata->mutex);
spin_lock_init(&drvdata->value_lock);
/* We cache the configuration register and read startup values
* from it. */
drvdata->reg_val = wm831x_reg_read(wm831x, drvdata->reg);
if (drvdata->reg_val & WM831X_LED_MODE_MASK)
drvdata->brightness = LED_FULL;
else
drvdata->brightness = LED_OFF;
/* Set a default source if configured, otherwise leave the
* current hardware setting.
*/
if (pdata.default_src == WM831X_STATUS_PRESERVE) {
drvdata->src = drvdata->reg_val;
drvdata->src &= WM831X_LED_SRC_MASK;
drvdata->src >>= WM831X_LED_SRC_SHIFT;
} else {
drvdata->src = pdata.default_src - 1;
}
drvdata->cdev.name = pdata.name;
drvdata->cdev.default_trigger = pdata.default_trigger;
drvdata->cdev.brightness_set_blocking = wm831x_status_brightness_set;
drvdata->cdev.blink_set = wm831x_status_blink_set;
drvdata->cdev.groups = wm831x_status_groups;
ret = led_classdev_register(wm831x->dev, &drvdata->cdev);
if (ret < 0) {
dev_err(&pdev->dev, "Failed to register LED: %d\n", ret);
return ret;
}
platform_set_drvdata(pdev, drvdata);
return 0;
}
static int wm831x_status_remove(struct platform_device *pdev)
{
struct wm831x_status *drvdata = platform_get_drvdata(pdev);
led_classdev_unregister(&drvdata->cdev);
return 0;
}
static struct platform_driver wm831x_status_driver = {
.driver = {
.name = "wm831x-status",
},
.probe = wm831x_status_probe,
.remove = wm831x_status_remove,
};
module_platform_driver(wm831x_status_driver);
MODULE_AUTHOR("Mark Brown <[email protected]>");
MODULE_DESCRIPTION("WM831x status LED driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:wm831x-status");
| linux-master | drivers/leds/leds-wm831x-status.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* leds-lp3944.c - driver for National Semiconductor LP3944 Funlight Chip
*
* Copyright (C) 2009 Antonio Ospite <[email protected]>
*/
/*
* I2C driver for National Semiconductor LP3944 Funlight Chip
* http://www.national.com/pf/LP/LP3944.html
*
* This helper chip can drive up to 8 leds, with two programmable DIM modes;
* it could even be used as a gpio expander but this driver assumes it is used
* as a led controller.
*
* The DIM modes are used to set _blink_ patterns for leds, the pattern is
* specified supplying two parameters:
* - period: from 0s to 1.6s
* - duty cycle: percentage of the period the led is on, from 0 to 100
*
* LP3944 can be found on Motorola A910 smartphone, where it drives the rgb
* leds, the camera flash light and the displays backlights.
*/
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/leds.h>
#include <linux/mutex.h>
#include <linux/leds-lp3944.h>
/* Read Only Registers */
#define LP3944_REG_INPUT1 0x00 /* LEDs 0-7 InputRegister (Read Only) */
#define LP3944_REG_REGISTER1 0x01 /* None (Read Only) */
#define LP3944_REG_PSC0 0x02 /* Frequency Prescaler 0 (R/W) */
#define LP3944_REG_PWM0 0x03 /* PWM Register 0 (R/W) */
#define LP3944_REG_PSC1 0x04 /* Frequency Prescaler 1 (R/W) */
#define LP3944_REG_PWM1 0x05 /* PWM Register 1 (R/W) */
#define LP3944_REG_LS0 0x06 /* LEDs 0-3 Selector (R/W) */
#define LP3944_REG_LS1 0x07 /* LEDs 4-7 Selector (R/W) */
/* These registers are not used to control leds in LP3944, they can store
* arbitrary values which the chip will ignore.
*/
#define LP3944_REG_REGISTER8 0x08
#define LP3944_REG_REGISTER9 0x09
#define LP3944_DIM0 0
#define LP3944_DIM1 1
/* period in ms */
#define LP3944_PERIOD_MIN 0
#define LP3944_PERIOD_MAX 1600
/* duty cycle is a percentage */
#define LP3944_DUTY_CYCLE_MIN 0
#define LP3944_DUTY_CYCLE_MAX 100
#define ldev_to_led(c) container_of(c, struct lp3944_led_data, ldev)
/* Saved data */
struct lp3944_led_data {
u8 id;
enum lp3944_type type;
struct led_classdev ldev;
struct i2c_client *client;
};
struct lp3944_data {
struct mutex lock;
struct i2c_client *client;
struct lp3944_led_data leds[LP3944_LEDS_MAX];
};
static int lp3944_reg_read(struct i2c_client *client, u8 reg, u8 *value)
{
int tmp;
tmp = i2c_smbus_read_byte_data(client, reg);
if (tmp < 0)
return tmp;
*value = tmp;
return 0;
}
static int lp3944_reg_write(struct i2c_client *client, u8 reg, u8 value)
{
return i2c_smbus_write_byte_data(client, reg, value);
}
/**
* lp3944_dim_set_period() - Set the period for DIM status
*
* @client: the i2c client
* @dim: either LP3944_DIM0 or LP3944_DIM1
* @period: period of a blink, that is a on/off cycle, expressed in ms.
*/
static int lp3944_dim_set_period(struct i2c_client *client, u8 dim, u16 period)
{
u8 psc_reg;
u8 psc_value;
int err;
if (dim == LP3944_DIM0)
psc_reg = LP3944_REG_PSC0;
else if (dim == LP3944_DIM1)
psc_reg = LP3944_REG_PSC1;
else
return -EINVAL;
/* Convert period to Prescaler value */
if (period > LP3944_PERIOD_MAX)
return -EINVAL;
psc_value = (period * 255) / LP3944_PERIOD_MAX;
err = lp3944_reg_write(client, psc_reg, psc_value);
return err;
}
/**
* lp3944_dim_set_dutycycle - Set the duty cycle for DIM status
*
* @client: the i2c client
* @dim: either LP3944_DIM0 or LP3944_DIM1
* @duty_cycle: percentage of a period during which a led is ON
*/
static int lp3944_dim_set_dutycycle(struct i2c_client *client, u8 dim,
u8 duty_cycle)
{
u8 pwm_reg;
u8 pwm_value;
int err;
if (dim == LP3944_DIM0)
pwm_reg = LP3944_REG_PWM0;
else if (dim == LP3944_DIM1)
pwm_reg = LP3944_REG_PWM1;
else
return -EINVAL;
/* Convert duty cycle to PWM value */
if (duty_cycle > LP3944_DUTY_CYCLE_MAX)
return -EINVAL;
pwm_value = (duty_cycle * 255) / LP3944_DUTY_CYCLE_MAX;
err = lp3944_reg_write(client, pwm_reg, pwm_value);
return err;
}
/**
* lp3944_led_set() - Set the led status
*
* @led: a lp3944_led_data structure
* @status: one of LP3944_LED_STATUS_OFF
* LP3944_LED_STATUS_ON
* LP3944_LED_STATUS_DIM0
* LP3944_LED_STATUS_DIM1
*/
static int lp3944_led_set(struct lp3944_led_data *led, u8 status)
{
struct lp3944_data *data = i2c_get_clientdata(led->client);
u8 id = led->id;
u8 reg;
u8 val = 0;
int err;
dev_dbg(&led->client->dev, "%s: %s, status before normalization:%d\n",
__func__, led->ldev.name, status);
switch (id) {
case LP3944_LED0:
case LP3944_LED1:
case LP3944_LED2:
case LP3944_LED3:
reg = LP3944_REG_LS0;
break;
case LP3944_LED4:
case LP3944_LED5:
case LP3944_LED6:
case LP3944_LED7:
id -= LP3944_LED4;
reg = LP3944_REG_LS1;
break;
default:
return -EINVAL;
}
if (status > LP3944_LED_STATUS_DIM1)
return -EINVAL;
/*
* Invert status only when it's < 2 (i.e. 0 or 1) which means it's
* controlling the on/off state directly.
* When, instead, status is >= 2 don't invert it because it would mean
* to mess with the hardware blinking mode.
*/
if (led->type == LP3944_LED_TYPE_LED_INVERTED && status < 2)
status = 1 - status;
mutex_lock(&data->lock);
lp3944_reg_read(led->client, reg, &val);
val &= ~(LP3944_LED_STATUS_MASK << (id << 1));
val |= (status << (id << 1));
dev_dbg(&led->client->dev, "%s: %s, reg:%d id:%d status:%d val:%#x\n",
__func__, led->ldev.name, reg, id, status, val);
/* set led status */
err = lp3944_reg_write(led->client, reg, val);
mutex_unlock(&data->lock);
return err;
}
static int lp3944_led_set_blink(struct led_classdev *led_cdev,
unsigned long *delay_on,
unsigned long *delay_off)
{
struct lp3944_led_data *led = ldev_to_led(led_cdev);
u16 period;
u8 duty_cycle;
int err;
/* units are in ms */
if (*delay_on + *delay_off > LP3944_PERIOD_MAX)
return -EINVAL;
if (*delay_on == 0 && *delay_off == 0) {
/* Special case: the leds subsystem requires a default user
* friendly blink pattern for the LED. Let's blink the led
* slowly (1Hz).
*/
*delay_on = 500;
*delay_off = 500;
}
period = (*delay_on) + (*delay_off);
/* duty_cycle is the percentage of period during which the led is ON */
duty_cycle = 100 * (*delay_on) / period;
/* invert duty cycle for inverted leds, this has the same effect of
* swapping delay_on and delay_off
*/
if (led->type == LP3944_LED_TYPE_LED_INVERTED)
duty_cycle = 100 - duty_cycle;
/* NOTE: using always the first DIM mode, this means that all leds
* will have the same blinking pattern.
*
* We could find a way later to have two leds blinking in hardware
* with different patterns at the same time, falling back to software
* control for the other ones.
*/
err = lp3944_dim_set_period(led->client, LP3944_DIM0, period);
if (err)
return err;
err = lp3944_dim_set_dutycycle(led->client, LP3944_DIM0, duty_cycle);
if (err)
return err;
dev_dbg(&led->client->dev, "%s: OK hardware accelerated blink!\n",
__func__);
lp3944_led_set(led, LP3944_LED_STATUS_DIM0);
return 0;
}
static int lp3944_led_set_brightness(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
struct lp3944_led_data *led = ldev_to_led(led_cdev);
dev_dbg(&led->client->dev, "%s: %s, %d\n",
__func__, led_cdev->name, brightness);
return lp3944_led_set(led, !!brightness);
}
static int lp3944_configure(struct i2c_client *client,
struct lp3944_data *data,
struct lp3944_platform_data *pdata)
{
int i, err = 0;
for (i = 0; i < pdata->leds_size; i++) {
struct lp3944_led *pled = &pdata->leds[i];
struct lp3944_led_data *led = &data->leds[i];
led->client = client;
led->id = i;
switch (pled->type) {
case LP3944_LED_TYPE_LED:
case LP3944_LED_TYPE_LED_INVERTED:
led->type = pled->type;
led->ldev.name = pled->name;
led->ldev.max_brightness = 1;
led->ldev.brightness_set_blocking =
lp3944_led_set_brightness;
led->ldev.blink_set = lp3944_led_set_blink;
led->ldev.flags = LED_CORE_SUSPENDRESUME;
err = led_classdev_register(&client->dev, &led->ldev);
if (err < 0) {
dev_err(&client->dev,
"couldn't register LED %s\n",
led->ldev.name);
goto exit;
}
/* to expose the default value to userspace */
led->ldev.brightness =
(enum led_brightness) pled->status;
/* Set the default led status */
err = lp3944_led_set(led, pled->status);
if (err < 0) {
dev_err(&client->dev,
"%s couldn't set STATUS %d\n",
led->ldev.name, pled->status);
goto exit;
}
break;
case LP3944_LED_TYPE_NONE:
default:
break;
}
}
return 0;
exit:
if (i > 0)
for (i = i - 1; i >= 0; i--)
switch (pdata->leds[i].type) {
case LP3944_LED_TYPE_LED:
case LP3944_LED_TYPE_LED_INVERTED:
led_classdev_unregister(&data->leds[i].ldev);
break;
case LP3944_LED_TYPE_NONE:
default:
break;
}
return err;
}
static int lp3944_probe(struct i2c_client *client)
{
struct lp3944_platform_data *lp3944_pdata =
dev_get_platdata(&client->dev);
struct lp3944_data *data;
int err;
if (lp3944_pdata == NULL) {
dev_err(&client->dev, "no platform data\n");
return -EINVAL;
}
/* Let's see whether this adapter can support what we need. */
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_BYTE_DATA)) {
dev_err(&client->dev, "insufficient functionality!\n");
return -ENODEV;
}
data = devm_kzalloc(&client->dev, sizeof(struct lp3944_data),
GFP_KERNEL);
if (!data)
return -ENOMEM;
data->client = client;
i2c_set_clientdata(client, data);
mutex_init(&data->lock);
err = lp3944_configure(client, data, lp3944_pdata);
if (err < 0)
return err;
dev_info(&client->dev, "lp3944 enabled\n");
return 0;
}
static void lp3944_remove(struct i2c_client *client)
{
struct lp3944_platform_data *pdata = dev_get_platdata(&client->dev);
struct lp3944_data *data = i2c_get_clientdata(client);
int i;
for (i = 0; i < pdata->leds_size; i++)
switch (data->leds[i].type) {
case LP3944_LED_TYPE_LED:
case LP3944_LED_TYPE_LED_INVERTED:
led_classdev_unregister(&data->leds[i].ldev);
break;
case LP3944_LED_TYPE_NONE:
default:
break;
}
}
/* lp3944 i2c driver struct */
static const struct i2c_device_id lp3944_id[] = {
{"lp3944", 0},
{}
};
MODULE_DEVICE_TABLE(i2c, lp3944_id);
static struct i2c_driver lp3944_driver = {
.driver = {
.name = "lp3944",
},
.probe = lp3944_probe,
.remove = lp3944_remove,
.id_table = lp3944_id,
};
module_i2c_driver(lp3944_driver);
MODULE_AUTHOR("Antonio Ospite <[email protected]>");
MODULE_DESCRIPTION("LP3944 Fun Light Chip");
MODULE_LICENSE("GPL");
| linux-master | drivers/leds/leds-lp3944.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* LED driver for WM8350 driven LEDS.
*
* Copyright(C) 2007, 2008 Wolfson Microelectronics PLC.
*/
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/leds.h>
#include <linux/err.h>
#include <linux/mfd/wm8350/pmic.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/module.h>
/* Microamps */
static const int isink_cur[] = {
4,
5,
6,
7,
8,
10,
11,
14,
16,
19,
23,
27,
32,
39,
46,
54,
65,
77,
92,
109,
130,
154,
183,
218,
259,
308,
367,
436,
518,
616,
733,
872,
1037,
1233,
1466,
1744,
2073,
2466,
2933,
3487,
4147,
4932,
5865,
6975,
8294,
9864,
11730,
13949,
16589,
19728,
23460,
27899,
33178,
39455,
46920,
55798,
66355,
78910,
93840,
111596,
132710,
157820,
187681,
223191
};
#define to_wm8350_led(led_cdev) \
container_of(led_cdev, struct wm8350_led, cdev)
static int wm8350_led_enable(struct wm8350_led *led)
{
int ret = 0;
if (led->enabled)
return ret;
ret = regulator_enable(led->isink);
if (ret != 0) {
dev_err(led->cdev.dev, "Failed to enable ISINK: %d\n", ret);
return ret;
}
ret = regulator_enable(led->dcdc);
if (ret != 0) {
dev_err(led->cdev.dev, "Failed to enable DCDC: %d\n", ret);
regulator_disable(led->isink);
return ret;
}
led->enabled = 1;
return ret;
}
static int wm8350_led_disable(struct wm8350_led *led)
{
int ret = 0;
if (!led->enabled)
return ret;
ret = regulator_disable(led->dcdc);
if (ret != 0) {
dev_err(led->cdev.dev, "Failed to disable DCDC: %d\n", ret);
return ret;
}
ret = regulator_disable(led->isink);
if (ret != 0) {
dev_err(led->cdev.dev, "Failed to disable ISINK: %d\n", ret);
ret = regulator_enable(led->dcdc);
if (ret != 0)
dev_err(led->cdev.dev, "Failed to reenable DCDC: %d\n",
ret);
return ret;
}
led->enabled = 0;
return ret;
}
static int wm8350_led_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
struct wm8350_led *led = to_wm8350_led(led_cdev);
unsigned long flags;
int ret;
int uA;
led->value = value;
spin_lock_irqsave(&led->value_lock, flags);
if (led->value == LED_OFF) {
spin_unlock_irqrestore(&led->value_lock, flags);
return wm8350_led_disable(led);
}
/* This scales linearly into the index of valid current
* settings which results in a linear scaling of perceived
* brightness due to the non-linear current settings provided
* by the hardware.
*/
uA = (led->max_uA_index * led->value) / LED_FULL;
spin_unlock_irqrestore(&led->value_lock, flags);
BUG_ON(uA >= ARRAY_SIZE(isink_cur));
ret = regulator_set_current_limit(led->isink, isink_cur[uA],
isink_cur[uA]);
if (ret != 0) {
dev_err(led->cdev.dev, "Failed to set %duA: %d\n",
isink_cur[uA], ret);
return ret;
}
return wm8350_led_enable(led);
}
static void wm8350_led_shutdown(struct platform_device *pdev)
{
struct wm8350_led *led = platform_get_drvdata(pdev);
led->value = LED_OFF;
wm8350_led_disable(led);
}
static int wm8350_led_probe(struct platform_device *pdev)
{
struct regulator *isink, *dcdc;
struct wm8350_led *led;
struct wm8350_led_platform_data *pdata = dev_get_platdata(&pdev->dev);
int i;
if (pdata == NULL) {
dev_err(&pdev->dev, "no platform data\n");
return -ENODEV;
}
if (pdata->max_uA < isink_cur[0]) {
dev_err(&pdev->dev, "Invalid maximum current %duA\n",
pdata->max_uA);
return -EINVAL;
}
isink = devm_regulator_get(&pdev->dev, "led_isink");
if (IS_ERR(isink)) {
dev_err(&pdev->dev, "%s: can't get ISINK\n", __func__);
return PTR_ERR(isink);
}
dcdc = devm_regulator_get(&pdev->dev, "led_vcc");
if (IS_ERR(dcdc)) {
dev_err(&pdev->dev, "%s: can't get DCDC\n", __func__);
return PTR_ERR(dcdc);
}
led = devm_kzalloc(&pdev->dev, sizeof(*led), GFP_KERNEL);
if (led == NULL)
return -ENOMEM;
led->cdev.brightness_set_blocking = wm8350_led_set;
led->cdev.default_trigger = pdata->default_trigger;
led->cdev.name = pdata->name;
led->cdev.flags |= LED_CORE_SUSPENDRESUME;
led->enabled = regulator_is_enabled(isink);
led->isink = isink;
led->dcdc = dcdc;
for (i = 0; i < ARRAY_SIZE(isink_cur) - 1; i++)
if (isink_cur[i] >= pdata->max_uA)
break;
led->max_uA_index = i;
if (pdata->max_uA != isink_cur[i])
dev_warn(&pdev->dev,
"Maximum current %duA is not directly supported,"
" check platform data\n",
pdata->max_uA);
spin_lock_init(&led->value_lock);
led->value = LED_OFF;
platform_set_drvdata(pdev, led);
return led_classdev_register(&pdev->dev, &led->cdev);
}
static int wm8350_led_remove(struct platform_device *pdev)
{
struct wm8350_led *led = platform_get_drvdata(pdev);
led_classdev_unregister(&led->cdev);
wm8350_led_disable(led);
return 0;
}
static struct platform_driver wm8350_led_driver = {
.driver = {
.name = "wm8350-led",
},
.probe = wm8350_led_probe,
.remove = wm8350_led_remove,
.shutdown = wm8350_led_shutdown,
};
module_platform_driver(wm8350_led_driver);
MODULE_AUTHOR("Mark Brown");
MODULE_DESCRIPTION("WM8350 LED driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:wm8350-led");
| linux-master | drivers/leds/leds-wm8350.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2011 Pengutronix
* Uwe Kleine-Koenig <[email protected]>
*/
#include <linux/err.h>
#include <linux/leds.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
/**
* gpio_led_register_device - register a gpio-led device
* @pdata: the platform data used for the new device
* @id: platform ID
*
* Makes a copy of pdata and pdata->leds and registers a new leds-gpio device
* with the result. This allows to have pdata and pdata-leds in .init.rodata
* and so saves some bytes compared to a static struct platform_device with
* static platform data.
*
* Returns the registered device or an error pointer.
*/
struct platform_device *__init gpio_led_register_device(
int id, const struct gpio_led_platform_data *pdata)
{
struct platform_device *ret;
struct gpio_led_platform_data _pdata = *pdata;
if (!pdata->num_leds)
return ERR_PTR(-EINVAL);
_pdata.leds = kmemdup(pdata->leds,
pdata->num_leds * sizeof(*pdata->leds), GFP_KERNEL);
if (!_pdata.leds)
return ERR_PTR(-ENOMEM);
ret = platform_device_register_resndata(NULL, "leds-gpio", id,
NULL, 0, &_pdata, sizeof(_pdata));
if (IS_ERR(ret))
kfree(_pdata.leds);
return ret;
}
| linux-master | drivers/leds/leds-gpio-register.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* lp5523.c - LP5523, LP55231 LED Driver
*
* Copyright (C) 2010 Nokia Corporation
* Copyright (C) 2012 Texas Instruments
*
* Contact: Samu Onkalo <[email protected]>
* Milo(Woogyom) Kim <[email protected]>
*/
#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/i2c.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/platform_data/leds-lp55xx.h>
#include <linux/slab.h>
#include "leds-lp55xx-common.h"
#define LP5523_PROGRAM_LENGTH 32 /* bytes */
/* Memory is used like this:
* 0x00 engine 1 program
* 0x10 engine 2 program
* 0x20 engine 3 program
* 0x30 engine 1 muxing info
* 0x40 engine 2 muxing info
* 0x50 engine 3 muxing info
*/
#define LP5523_MAX_LEDS 9
/* Registers */
#define LP5523_REG_ENABLE 0x00
#define LP5523_REG_OP_MODE 0x01
#define LP5523_REG_ENABLE_LEDS_MSB 0x04
#define LP5523_REG_ENABLE_LEDS_LSB 0x05
#define LP5523_REG_LED_CTRL_BASE 0x06
#define LP5523_REG_LED_PWM_BASE 0x16
#define LP5523_REG_LED_CURRENT_BASE 0x26
#define LP5523_REG_CONFIG 0x36
#define LP5523_REG_STATUS 0x3A
#define LP5523_REG_RESET 0x3D
#define LP5523_REG_LED_TEST_CTRL 0x41
#define LP5523_REG_LED_TEST_ADC 0x42
#define LP5523_REG_MASTER_FADER_BASE 0x48
#define LP5523_REG_CH1_PROG_START 0x4C
#define LP5523_REG_CH2_PROG_START 0x4D
#define LP5523_REG_CH3_PROG_START 0x4E
#define LP5523_REG_PROG_PAGE_SEL 0x4F
#define LP5523_REG_PROG_MEM 0x50
/* Bit description in registers */
#define LP5523_ENABLE 0x40
#define LP5523_AUTO_INC 0x40
#define LP5523_PWR_SAVE 0x20
#define LP5523_PWM_PWR_SAVE 0x04
#define LP5523_CP_MODE_MASK 0x18
#define LP5523_CP_MODE_SHIFT 3
#define LP5523_AUTO_CLK 0x02
#define LP5523_DEFAULT_CONFIG \
(LP5523_AUTO_INC | LP5523_PWR_SAVE | LP5523_AUTO_CLK | LP5523_PWM_PWR_SAVE)
#define LP5523_EN_LEDTEST 0x80
#define LP5523_LEDTEST_DONE 0x80
#define LP5523_RESET 0xFF
#define LP5523_ADC_SHORTCIRC_LIM 80
#define LP5523_EXT_CLK_USED 0x08
#define LP5523_ENG_STATUS_MASK 0x07
#define LP5523_FADER_MAPPING_MASK 0xC0
#define LP5523_FADER_MAPPING_SHIFT 6
/* Memory Page Selection */
#define LP5523_PAGE_ENG1 0
#define LP5523_PAGE_ENG2 1
#define LP5523_PAGE_ENG3 2
#define LP5523_PAGE_MUX1 3
#define LP5523_PAGE_MUX2 4
#define LP5523_PAGE_MUX3 5
/* Program Memory Operations */
#define LP5523_MODE_ENG1_M 0x30 /* Operation Mode Register */
#define LP5523_MODE_ENG2_M 0x0C
#define LP5523_MODE_ENG3_M 0x03
#define LP5523_LOAD_ENG1 0x10
#define LP5523_LOAD_ENG2 0x04
#define LP5523_LOAD_ENG3 0x01
#define LP5523_ENG1_IS_LOADING(mode) \
((mode & LP5523_MODE_ENG1_M) == LP5523_LOAD_ENG1)
#define LP5523_ENG2_IS_LOADING(mode) \
((mode & LP5523_MODE_ENG2_M) == LP5523_LOAD_ENG2)
#define LP5523_ENG3_IS_LOADING(mode) \
((mode & LP5523_MODE_ENG3_M) == LP5523_LOAD_ENG3)
#define LP5523_EXEC_ENG1_M 0x30 /* Enable Register */
#define LP5523_EXEC_ENG2_M 0x0C
#define LP5523_EXEC_ENG3_M 0x03
#define LP5523_EXEC_M 0x3F
#define LP5523_RUN_ENG1 0x20
#define LP5523_RUN_ENG2 0x08
#define LP5523_RUN_ENG3 0x02
#define LED_ACTIVE(mux, led) (!!(mux & (0x0001 << led)))
enum lp5523_chip_id {
LP5523,
LP55231,
};
static int lp5523_init_program_engine(struct lp55xx_chip *chip);
static inline void lp5523_wait_opmode_done(void)
{
usleep_range(1000, 2000);
}
static void lp5523_set_led_current(struct lp55xx_led *led, u8 led_current)
{
led->led_current = led_current;
lp55xx_write(led->chip, LP5523_REG_LED_CURRENT_BASE + led->chan_nr,
led_current);
}
static int lp5523_post_init_device(struct lp55xx_chip *chip)
{
int ret;
int val;
ret = lp55xx_write(chip, LP5523_REG_ENABLE, LP5523_ENABLE);
if (ret)
return ret;
/* Chip startup time is 500 us, 1 - 2 ms gives some margin */
usleep_range(1000, 2000);
val = LP5523_DEFAULT_CONFIG;
val |= (chip->pdata->charge_pump_mode << LP5523_CP_MODE_SHIFT) & LP5523_CP_MODE_MASK;
ret = lp55xx_write(chip, LP5523_REG_CONFIG, val);
if (ret)
return ret;
/* turn on all leds */
ret = lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_MSB, 0x01);
if (ret)
return ret;
ret = lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_LSB, 0xff);
if (ret)
return ret;
return lp5523_init_program_engine(chip);
}
static void lp5523_load_engine(struct lp55xx_chip *chip)
{
enum lp55xx_engine_index idx = chip->engine_idx;
static const u8 mask[] = {
[LP55XX_ENGINE_1] = LP5523_MODE_ENG1_M,
[LP55XX_ENGINE_2] = LP5523_MODE_ENG2_M,
[LP55XX_ENGINE_3] = LP5523_MODE_ENG3_M,
};
static const u8 val[] = {
[LP55XX_ENGINE_1] = LP5523_LOAD_ENG1,
[LP55XX_ENGINE_2] = LP5523_LOAD_ENG2,
[LP55XX_ENGINE_3] = LP5523_LOAD_ENG3,
};
lp55xx_update_bits(chip, LP5523_REG_OP_MODE, mask[idx], val[idx]);
lp5523_wait_opmode_done();
}
static void lp5523_load_engine_and_select_page(struct lp55xx_chip *chip)
{
enum lp55xx_engine_index idx = chip->engine_idx;
static const u8 page_sel[] = {
[LP55XX_ENGINE_1] = LP5523_PAGE_ENG1,
[LP55XX_ENGINE_2] = LP5523_PAGE_ENG2,
[LP55XX_ENGINE_3] = LP5523_PAGE_ENG3,
};
lp5523_load_engine(chip);
lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, page_sel[idx]);
}
static void lp5523_stop_all_engines(struct lp55xx_chip *chip)
{
lp55xx_write(chip, LP5523_REG_OP_MODE, 0);
lp5523_wait_opmode_done();
}
static void lp5523_stop_engine(struct lp55xx_chip *chip)
{
enum lp55xx_engine_index idx = chip->engine_idx;
static const u8 mask[] = {
[LP55XX_ENGINE_1] = LP5523_MODE_ENG1_M,
[LP55XX_ENGINE_2] = LP5523_MODE_ENG2_M,
[LP55XX_ENGINE_3] = LP5523_MODE_ENG3_M,
};
lp55xx_update_bits(chip, LP5523_REG_OP_MODE, mask[idx], 0);
lp5523_wait_opmode_done();
}
static void lp5523_turn_off_channels(struct lp55xx_chip *chip)
{
int i;
for (i = 0; i < LP5523_MAX_LEDS; i++)
lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0);
}
static void lp5523_run_engine(struct lp55xx_chip *chip, bool start)
{
int ret;
u8 mode;
u8 exec;
/* stop engine */
if (!start) {
lp5523_stop_engine(chip);
lp5523_turn_off_channels(chip);
return;
}
/*
* To run the engine,
* operation mode and enable register should updated at the same time
*/
ret = lp55xx_read(chip, LP5523_REG_OP_MODE, &mode);
if (ret)
return;
ret = lp55xx_read(chip, LP5523_REG_ENABLE, &exec);
if (ret)
return;
/* change operation mode to RUN only when each engine is loading */
if (LP5523_ENG1_IS_LOADING(mode)) {
mode = (mode & ~LP5523_MODE_ENG1_M) | LP5523_RUN_ENG1;
exec = (exec & ~LP5523_EXEC_ENG1_M) | LP5523_RUN_ENG1;
}
if (LP5523_ENG2_IS_LOADING(mode)) {
mode = (mode & ~LP5523_MODE_ENG2_M) | LP5523_RUN_ENG2;
exec = (exec & ~LP5523_EXEC_ENG2_M) | LP5523_RUN_ENG2;
}
if (LP5523_ENG3_IS_LOADING(mode)) {
mode = (mode & ~LP5523_MODE_ENG3_M) | LP5523_RUN_ENG3;
exec = (exec & ~LP5523_EXEC_ENG3_M) | LP5523_RUN_ENG3;
}
lp55xx_write(chip, LP5523_REG_OP_MODE, mode);
lp5523_wait_opmode_done();
lp55xx_update_bits(chip, LP5523_REG_ENABLE, LP5523_EXEC_M, exec);
}
static int lp5523_init_program_engine(struct lp55xx_chip *chip)
{
int i;
int j;
int ret;
u8 status;
/* one pattern per engine setting LED MUX start and stop addresses */
static const u8 pattern[][LP5523_PROGRAM_LENGTH] = {
{ 0x9c, 0x30, 0x9c, 0xb0, 0x9d, 0x80, 0xd8, 0x00, 0},
{ 0x9c, 0x40, 0x9c, 0xc0, 0x9d, 0x80, 0xd8, 0x00, 0},
{ 0x9c, 0x50, 0x9c, 0xd0, 0x9d, 0x80, 0xd8, 0x00, 0},
};
/* hardcode 32 bytes of memory for each engine from program memory */
ret = lp55xx_write(chip, LP5523_REG_CH1_PROG_START, 0x00);
if (ret)
return ret;
ret = lp55xx_write(chip, LP5523_REG_CH2_PROG_START, 0x10);
if (ret)
return ret;
ret = lp55xx_write(chip, LP5523_REG_CH3_PROG_START, 0x20);
if (ret)
return ret;
/* write LED MUX address space for each engine */
for (i = LP55XX_ENGINE_1; i <= LP55XX_ENGINE_3; i++) {
chip->engine_idx = i;
lp5523_load_engine_and_select_page(chip);
for (j = 0; j < LP5523_PROGRAM_LENGTH; j++) {
ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + j,
pattern[i - 1][j]);
if (ret)
goto out;
}
}
lp5523_run_engine(chip, true);
/* Let the programs run for couple of ms and check the engine status */
usleep_range(3000, 6000);
ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
if (ret)
goto out;
status &= LP5523_ENG_STATUS_MASK;
if (status != LP5523_ENG_STATUS_MASK) {
dev_err(&chip->cl->dev,
"could not configure LED engine, status = 0x%.2x\n",
status);
ret = -1;
}
out:
lp5523_stop_all_engines(chip);
return ret;
}
static int lp5523_update_program_memory(struct lp55xx_chip *chip,
const u8 *data, size_t size)
{
u8 pattern[LP5523_PROGRAM_LENGTH] = {0};
unsigned int cmd;
char c[3];
int nrchars;
int ret;
int offset = 0;
int i = 0;
while ((offset < size - 1) && (i < LP5523_PROGRAM_LENGTH)) {
/* separate sscanfs because length is working only for %s */
ret = sscanf(data + offset, "%2s%n ", c, &nrchars);
if (ret != 1)
goto err;
ret = sscanf(c, "%2x", &cmd);
if (ret != 1)
goto err;
pattern[i] = (u8)cmd;
offset += nrchars;
i++;
}
/* Each instruction is 16bit long. Check that length is even */
if (i % 2)
goto err;
for (i = 0; i < LP5523_PROGRAM_LENGTH; i++) {
ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + i, pattern[i]);
if (ret)
return -EINVAL;
}
return size;
err:
dev_err(&chip->cl->dev, "wrong pattern format\n");
return -EINVAL;
}
static void lp5523_firmware_loaded(struct lp55xx_chip *chip)
{
const struct firmware *fw = chip->fw;
if (fw->size > LP5523_PROGRAM_LENGTH) {
dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n",
fw->size);
return;
}
/*
* Program memory sequence
* 1) set engine mode to "LOAD"
* 2) write firmware data into program memory
*/
lp5523_load_engine_and_select_page(chip);
lp5523_update_program_memory(chip, fw->data, fw->size);
}
static ssize_t show_engine_mode(struct device *dev,
struct device_attribute *attr,
char *buf, int nr)
{
struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
struct lp55xx_chip *chip = led->chip;
enum lp55xx_engine_mode mode = chip->engines[nr - 1].mode;
switch (mode) {
case LP55XX_ENGINE_RUN:
return sprintf(buf, "run\n");
case LP55XX_ENGINE_LOAD:
return sprintf(buf, "load\n");
case LP55XX_ENGINE_DISABLED:
default:
return sprintf(buf, "disabled\n");
}
}
show_mode(1)
show_mode(2)
show_mode(3)
static ssize_t store_engine_mode(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t len, int nr)
{
struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
struct lp55xx_chip *chip = led->chip;
struct lp55xx_engine *engine = &chip->engines[nr - 1];
mutex_lock(&chip->lock);
chip->engine_idx = nr;
if (!strncmp(buf, "run", 3)) {
lp5523_run_engine(chip, true);
engine->mode = LP55XX_ENGINE_RUN;
} else if (!strncmp(buf, "load", 4)) {
lp5523_stop_engine(chip);
lp5523_load_engine(chip);
engine->mode = LP55XX_ENGINE_LOAD;
} else if (!strncmp(buf, "disabled", 8)) {
lp5523_stop_engine(chip);
engine->mode = LP55XX_ENGINE_DISABLED;
}
mutex_unlock(&chip->lock);
return len;
}
store_mode(1)
store_mode(2)
store_mode(3)
static int lp5523_mux_parse(const char *buf, u16 *mux, size_t len)
{
u16 tmp_mux = 0;
int i;
len = min_t(int, len, LP5523_MAX_LEDS);
for (i = 0; i < len; i++) {
switch (buf[i]) {
case '1':
tmp_mux |= (1 << i);
break;
case '0':
break;
case '\n':
i = len;
break;
default:
return -1;
}
}
*mux = tmp_mux;
return 0;
}
static void lp5523_mux_to_array(u16 led_mux, char *array)
{
int i, pos = 0;
for (i = 0; i < LP5523_MAX_LEDS; i++)
pos += sprintf(array + pos, "%x", LED_ACTIVE(led_mux, i));
array[pos] = '\0';
}
static ssize_t show_engine_leds(struct device *dev,
struct device_attribute *attr,
char *buf, int nr)
{
struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
struct lp55xx_chip *chip = led->chip;
char mux[LP5523_MAX_LEDS + 1];
lp5523_mux_to_array(chip->engines[nr - 1].led_mux, mux);
return sprintf(buf, "%s\n", mux);
}
show_leds(1)
show_leds(2)
show_leds(3)
static int lp5523_load_mux(struct lp55xx_chip *chip, u16 mux, int nr)
{
struct lp55xx_engine *engine = &chip->engines[nr - 1];
int ret;
static const u8 mux_page[] = {
[LP55XX_ENGINE_1] = LP5523_PAGE_MUX1,
[LP55XX_ENGINE_2] = LP5523_PAGE_MUX2,
[LP55XX_ENGINE_3] = LP5523_PAGE_MUX3,
};
lp5523_load_engine(chip);
ret = lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, mux_page[nr]);
if (ret)
return ret;
ret = lp55xx_write(chip, LP5523_REG_PROG_MEM, (u8)(mux >> 8));
if (ret)
return ret;
ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + 1, (u8)(mux));
if (ret)
return ret;
engine->led_mux = mux;
return 0;
}
static ssize_t store_engine_leds(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t len, int nr)
{
struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
struct lp55xx_chip *chip = led->chip;
struct lp55xx_engine *engine = &chip->engines[nr - 1];
u16 mux = 0;
ssize_t ret;
if (lp5523_mux_parse(buf, &mux, len))
return -EINVAL;
mutex_lock(&chip->lock);
chip->engine_idx = nr;
ret = -EINVAL;
if (engine->mode != LP55XX_ENGINE_LOAD)
goto leave;
if (lp5523_load_mux(chip, mux, nr))
goto leave;
ret = len;
leave:
mutex_unlock(&chip->lock);
return ret;
}
store_leds(1)
store_leds(2)
store_leds(3)
static ssize_t store_engine_load(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t len, int nr)
{
struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
struct lp55xx_chip *chip = led->chip;
int ret;
mutex_lock(&chip->lock);
chip->engine_idx = nr;
lp5523_load_engine_and_select_page(chip);
ret = lp5523_update_program_memory(chip, buf, len);
mutex_unlock(&chip->lock);
return ret;
}
store_load(1)
store_load(2)
store_load(3)
static ssize_t lp5523_selftest(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
struct lp55xx_chip *chip = led->chip;
struct lp55xx_platform_data *pdata = chip->pdata;
int ret, pos = 0;
u8 status, adc, vdd, i;
mutex_lock(&chip->lock);
ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
if (ret < 0)
goto fail;
/* Check that ext clock is really in use if requested */
if (pdata->clock_mode == LP55XX_CLOCK_EXT) {
if ((status & LP5523_EXT_CLK_USED) == 0)
goto fail;
}
/* Measure VDD (i.e. VBAT) first (channel 16 corresponds to VDD) */
lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL, LP5523_EN_LEDTEST | 16);
usleep_range(3000, 6000); /* ADC conversion time is typically 2.7 ms */
ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
if (ret < 0)
goto fail;
if (!(status & LP5523_LEDTEST_DONE))
usleep_range(3000, 6000); /* Was not ready. Wait little bit */
ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &vdd);
if (ret < 0)
goto fail;
vdd--; /* There may be some fluctuation in measurement */
for (i = 0; i < pdata->num_channels; i++) {
/* Skip disabled channels */
if (pdata->led_config[i].led_current == 0)
continue;
/* Set default current */
lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + led->chan_nr,
pdata->led_config[i].led_current);
lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + led->chan_nr,
0xff);
/* let current stabilize 2 - 4ms before measurements start */
usleep_range(2000, 4000);
lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL,
LP5523_EN_LEDTEST | led->chan_nr);
/* ADC conversion time is 2.7 ms typically */
usleep_range(3000, 6000);
ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
if (ret < 0)
goto fail;
if (!(status & LP5523_LEDTEST_DONE))
usleep_range(3000, 6000); /* Was not ready. Wait. */
ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &adc);
if (ret < 0)
goto fail;
if (adc >= vdd || adc < LP5523_ADC_SHORTCIRC_LIM)
pos += sprintf(buf + pos, "LED %d FAIL\n",
led->chan_nr);
lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + led->chan_nr,
0x00);
/* Restore current */
lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + led->chan_nr,
led->led_current);
led++;
}
if (pos == 0)
pos = sprintf(buf, "OK\n");
goto release_lock;
fail:
pos = sprintf(buf, "FAIL\n");
release_lock:
mutex_unlock(&chip->lock);
return pos;
}
#define show_fader(nr) \
static ssize_t show_master_fader##nr(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
return show_master_fader(dev, attr, buf, nr); \
}
#define store_fader(nr) \
static ssize_t store_master_fader##nr(struct device *dev, \
struct device_attribute *attr, \
const char *buf, size_t len) \
{ \
return store_master_fader(dev, attr, buf, len, nr); \
}
static ssize_t show_master_fader(struct device *dev,
struct device_attribute *attr,
char *buf, int nr)
{
struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
struct lp55xx_chip *chip = led->chip;
int ret;
u8 val;
mutex_lock(&chip->lock);
ret = lp55xx_read(chip, LP5523_REG_MASTER_FADER_BASE + nr - 1, &val);
mutex_unlock(&chip->lock);
if (ret == 0)
ret = sprintf(buf, "%u\n", val);
return ret;
}
show_fader(1)
show_fader(2)
show_fader(3)
static ssize_t store_master_fader(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t len, int nr)
{
struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
struct lp55xx_chip *chip = led->chip;
int ret;
unsigned long val;
if (kstrtoul(buf, 0, &val))
return -EINVAL;
if (val > 0xff)
return -EINVAL;
mutex_lock(&chip->lock);
ret = lp55xx_write(chip, LP5523_REG_MASTER_FADER_BASE + nr - 1,
(u8)val);
mutex_unlock(&chip->lock);
if (ret == 0)
ret = len;
return ret;
}
store_fader(1)
store_fader(2)
store_fader(3)
static ssize_t show_master_fader_leds(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
struct lp55xx_chip *chip = led->chip;
int i, ret, pos = 0;
u8 val;
mutex_lock(&chip->lock);
for (i = 0; i < LP5523_MAX_LEDS; i++) {
ret = lp55xx_read(chip, LP5523_REG_LED_CTRL_BASE + i, &val);
if (ret)
goto leave;
val = (val & LP5523_FADER_MAPPING_MASK)
>> LP5523_FADER_MAPPING_SHIFT;
if (val > 3) {
ret = -EINVAL;
goto leave;
}
buf[pos++] = val + '0';
}
buf[pos++] = '\n';
ret = pos;
leave:
mutex_unlock(&chip->lock);
return ret;
}
static ssize_t store_master_fader_leds(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t len)
{
struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
struct lp55xx_chip *chip = led->chip;
int i, n, ret;
u8 val;
n = min_t(int, len, LP5523_MAX_LEDS);
mutex_lock(&chip->lock);
for (i = 0; i < n; i++) {
if (buf[i] >= '0' && buf[i] <= '3') {
val = (buf[i] - '0') << LP5523_FADER_MAPPING_SHIFT;
ret = lp55xx_update_bits(chip,
LP5523_REG_LED_CTRL_BASE + i,
LP5523_FADER_MAPPING_MASK,
val);
if (ret)
goto leave;
} else {
ret = -EINVAL;
goto leave;
}
}
ret = len;
leave:
mutex_unlock(&chip->lock);
return ret;
}
static int lp5523_multicolor_brightness(struct lp55xx_led *led)
{
struct lp55xx_chip *chip = led->chip;
int ret;
int i;
mutex_lock(&chip->lock);
for (i = 0; i < led->mc_cdev.num_colors; i++) {
ret = lp55xx_write(chip,
LP5523_REG_LED_PWM_BASE +
led->mc_cdev.subled_info[i].channel,
led->mc_cdev.subled_info[i].brightness);
if (ret)
break;
}
mutex_unlock(&chip->lock);
return ret;
}
static int lp5523_led_brightness(struct lp55xx_led *led)
{
struct lp55xx_chip *chip = led->chip;
int ret;
mutex_lock(&chip->lock);
ret = lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + led->chan_nr,
led->brightness);
mutex_unlock(&chip->lock);
return ret;
}
static LP55XX_DEV_ATTR_RW(engine1_mode, show_engine1_mode, store_engine1_mode);
static LP55XX_DEV_ATTR_RW(engine2_mode, show_engine2_mode, store_engine2_mode);
static LP55XX_DEV_ATTR_RW(engine3_mode, show_engine3_mode, store_engine3_mode);
static LP55XX_DEV_ATTR_RW(engine1_leds, show_engine1_leds, store_engine1_leds);
static LP55XX_DEV_ATTR_RW(engine2_leds, show_engine2_leds, store_engine2_leds);
static LP55XX_DEV_ATTR_RW(engine3_leds, show_engine3_leds, store_engine3_leds);
static LP55XX_DEV_ATTR_WO(engine1_load, store_engine1_load);
static LP55XX_DEV_ATTR_WO(engine2_load, store_engine2_load);
static LP55XX_DEV_ATTR_WO(engine3_load, store_engine3_load);
static LP55XX_DEV_ATTR_RO(selftest, lp5523_selftest);
static LP55XX_DEV_ATTR_RW(master_fader1, show_master_fader1,
store_master_fader1);
static LP55XX_DEV_ATTR_RW(master_fader2, show_master_fader2,
store_master_fader2);
static LP55XX_DEV_ATTR_RW(master_fader3, show_master_fader3,
store_master_fader3);
static LP55XX_DEV_ATTR_RW(master_fader_leds, show_master_fader_leds,
store_master_fader_leds);
static struct attribute *lp5523_attributes[] = {
&dev_attr_engine1_mode.attr,
&dev_attr_engine2_mode.attr,
&dev_attr_engine3_mode.attr,
&dev_attr_engine1_load.attr,
&dev_attr_engine2_load.attr,
&dev_attr_engine3_load.attr,
&dev_attr_engine1_leds.attr,
&dev_attr_engine2_leds.attr,
&dev_attr_engine3_leds.attr,
&dev_attr_selftest.attr,
&dev_attr_master_fader1.attr,
&dev_attr_master_fader2.attr,
&dev_attr_master_fader3.attr,
&dev_attr_master_fader_leds.attr,
NULL,
};
static const struct attribute_group lp5523_group = {
.attrs = lp5523_attributes,
};
/* Chip specific configurations */
static struct lp55xx_device_config lp5523_cfg = {
.reset = {
.addr = LP5523_REG_RESET,
.val = LP5523_RESET,
},
.enable = {
.addr = LP5523_REG_ENABLE,
.val = LP5523_ENABLE,
},
.max_channel = LP5523_MAX_LEDS,
.post_init_device = lp5523_post_init_device,
.brightness_fn = lp5523_led_brightness,
.multicolor_brightness_fn = lp5523_multicolor_brightness,
.set_led_current = lp5523_set_led_current,
.firmware_cb = lp5523_firmware_loaded,
.run_engine = lp5523_run_engine,
.dev_attr_group = &lp5523_group,
};
static int lp5523_probe(struct i2c_client *client)
{
const struct i2c_device_id *id = i2c_client_get_device_id(client);
int ret;
struct lp55xx_chip *chip;
struct lp55xx_led *led;
struct lp55xx_platform_data *pdata = dev_get_platdata(&client->dev);
struct device_node *np = dev_of_node(&client->dev);
chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
if (!chip)
return -ENOMEM;
chip->cfg = &lp5523_cfg;
if (!pdata) {
if (np) {
pdata = lp55xx_of_populate_pdata(&client->dev, np,
chip);
if (IS_ERR(pdata))
return PTR_ERR(pdata);
} else {
dev_err(&client->dev, "no platform data\n");
return -EINVAL;
}
}
led = devm_kcalloc(&client->dev,
pdata->num_channels, sizeof(*led), GFP_KERNEL);
if (!led)
return -ENOMEM;
chip->cl = client;
chip->pdata = pdata;
mutex_init(&chip->lock);
i2c_set_clientdata(client, led);
ret = lp55xx_init_device(chip);
if (ret)
goto err_init;
dev_info(&client->dev, "%s Programmable led chip found\n", id->name);
ret = lp55xx_register_leds(led, chip);
if (ret)
goto err_out;
ret = lp55xx_register_sysfs(chip);
if (ret) {
dev_err(&client->dev, "registering sysfs failed\n");
goto err_out;
}
return 0;
err_out:
lp55xx_deinit_device(chip);
err_init:
return ret;
}
static void lp5523_remove(struct i2c_client *client)
{
struct lp55xx_led *led = i2c_get_clientdata(client);
struct lp55xx_chip *chip = led->chip;
lp5523_stop_all_engines(chip);
lp55xx_unregister_sysfs(chip);
lp55xx_deinit_device(chip);
}
static const struct i2c_device_id lp5523_id[] = {
{ "lp5523", LP5523 },
{ "lp55231", LP55231 },
{ }
};
MODULE_DEVICE_TABLE(i2c, lp5523_id);
static const struct of_device_id of_lp5523_leds_match[] = {
{ .compatible = "national,lp5523", },
{ .compatible = "ti,lp55231", },
{},
};
MODULE_DEVICE_TABLE(of, of_lp5523_leds_match);
static struct i2c_driver lp5523_driver = {
.driver = {
.name = "lp5523x",
.of_match_table = of_lp5523_leds_match,
},
.probe = lp5523_probe,
.remove = lp5523_remove,
.id_table = lp5523_id,
};
module_i2c_driver(lp5523_driver);
MODULE_AUTHOR("Mathias Nyman <[email protected]>");
MODULE_AUTHOR("Milo Kim <[email protected]>");
MODULE_DESCRIPTION("LP5523 LED engine");
MODULE_LICENSE("GPL");
| linux-master | drivers/leds/leds-lp5523.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* leds-bd2802.c - RGB LED Driver
*
* Copyright (C) 2009 Samsung Electronics
* Kim Kyuwon <[email protected]>
*
* Datasheet: http://www.rohm.com/products/databook/driver/pdf/bd2802gu-e.pdf
*/
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/gpio/consumer.h>
#include <linux/delay.h>
#include <linux/leds.h>
#include <linux/leds-bd2802.h>
#include <linux/slab.h>
#include <linux/pm.h>
#define LED_CTL(rgb2en, rgb1en) ((rgb2en) << 4 | ((rgb1en) << 0))
#define BD2802_LED_OFFSET 0xa
#define BD2802_COLOR_OFFSET 0x3
#define BD2802_REG_CLKSETUP 0x00
#define BD2802_REG_CONTROL 0x01
#define BD2802_REG_HOURSETUP 0x02
#define BD2802_REG_CURRENT1SETUP 0x03
#define BD2802_REG_CURRENT2SETUP 0x04
#define BD2802_REG_WAVEPATTERN 0x05
#define BD2802_CURRENT_032 0x10 /* 3.2mA */
#define BD2802_CURRENT_000 0x00 /* 0.0mA */
#define BD2802_PATTERN_FULL 0x07
#define BD2802_PATTERN_HALF 0x03
enum led_ids {
LED1,
LED2,
LED_NUM,
};
enum led_colors {
RED,
GREEN,
BLUE,
};
enum led_bits {
BD2802_OFF,
BD2802_BLINK,
BD2802_ON,
};
/*
* State '0' : 'off'
* State '1' : 'blink'
* State '2' : 'on'.
*/
struct led_state {
unsigned r:2;
unsigned g:2;
unsigned b:2;
};
struct bd2802_led {
struct bd2802_led_platform_data *pdata;
struct i2c_client *client;
struct gpio_desc *reset;
struct rw_semaphore rwsem;
struct led_state led[2];
/*
* Making led_classdev as array is not recommended, because array
* members prevent using 'container_of' macro. So repetitive works
* are needed.
*/
struct led_classdev cdev_led1r;
struct led_classdev cdev_led1g;
struct led_classdev cdev_led1b;
struct led_classdev cdev_led2r;
struct led_classdev cdev_led2g;
struct led_classdev cdev_led2b;
/*
* Advanced Configuration Function(ADF) mode:
* In ADF mode, user can set registers of BD2802GU directly,
* therefore BD2802GU doesn't enter reset state.
*/
int adf_on;
enum led_ids led_id;
enum led_colors color;
enum led_bits state;
/* General attributes of RGB LEDs */
int wave_pattern;
int rgb_current;
};
/*--------------------------------------------------------------*/
/* BD2802GU helper functions */
/*--------------------------------------------------------------*/
static inline int bd2802_is_rgb_off(struct bd2802_led *led, enum led_ids id,
enum led_colors color)
{
switch (color) {
case RED:
return !led->led[id].r;
case GREEN:
return !led->led[id].g;
case BLUE:
return !led->led[id].b;
default:
dev_err(&led->client->dev, "%s: Invalid color\n", __func__);
return -EINVAL;
}
}
static inline int bd2802_is_led_off(struct bd2802_led *led, enum led_ids id)
{
if (led->led[id].r || led->led[id].g || led->led[id].b)
return 0;
return 1;
}
static inline int bd2802_is_all_off(struct bd2802_led *led)
{
int i;
for (i = 0; i < LED_NUM; i++)
if (!bd2802_is_led_off(led, i))
return 0;
return 1;
}
static inline u8 bd2802_get_base_offset(enum led_ids id, enum led_colors color)
{
return id * BD2802_LED_OFFSET + color * BD2802_COLOR_OFFSET;
}
static inline u8 bd2802_get_reg_addr(enum led_ids id, enum led_colors color,
u8 reg_offset)
{
return reg_offset + bd2802_get_base_offset(id, color);
}
/*--------------------------------------------------------------*/
/* BD2802GU core functions */
/*--------------------------------------------------------------*/
static int bd2802_write_byte(struct i2c_client *client, u8 reg, u8 val)
{
int ret = i2c_smbus_write_byte_data(client, reg, val);
if (ret >= 0)
return 0;
dev_err(&client->dev, "%s: reg 0x%x, val 0x%x, err %d\n",
__func__, reg, val, ret);
return ret;
}
static void bd2802_update_state(struct bd2802_led *led, enum led_ids id,
enum led_colors color, enum led_bits led_bit)
{
int i;
u8 value;
for (i = 0; i < LED_NUM; i++) {
if (i == id) {
switch (color) {
case RED:
led->led[i].r = led_bit;
break;
case GREEN:
led->led[i].g = led_bit;
break;
case BLUE:
led->led[i].b = led_bit;
break;
default:
dev_err(&led->client->dev,
"%s: Invalid color\n", __func__);
return;
}
}
}
if (led_bit == BD2802_BLINK || led_bit == BD2802_ON)
return;
if (!bd2802_is_led_off(led, id))
return;
if (bd2802_is_all_off(led) && !led->adf_on) {
gpiod_set_value(led->reset, 1);
return;
}
/*
* In this case, other led is turned on, and current led is turned
* off. So set RGB LED Control register to stop the current RGB LED
*/
value = (id == LED1) ? LED_CTL(1, 0) : LED_CTL(0, 1);
bd2802_write_byte(led->client, BD2802_REG_CONTROL, value);
}
static void bd2802_configure(struct bd2802_led *led)
{
struct bd2802_led_platform_data *pdata = led->pdata;
u8 reg;
reg = bd2802_get_reg_addr(LED1, RED, BD2802_REG_HOURSETUP);
bd2802_write_byte(led->client, reg, pdata->rgb_time);
reg = bd2802_get_reg_addr(LED2, RED, BD2802_REG_HOURSETUP);
bd2802_write_byte(led->client, reg, pdata->rgb_time);
}
static void bd2802_reset_cancel(struct bd2802_led *led)
{
gpiod_set_value(led->reset, 0);
udelay(100);
bd2802_configure(led);
}
static void bd2802_enable(struct bd2802_led *led, enum led_ids id)
{
enum led_ids other_led = (id == LED1) ? LED2 : LED1;
u8 value, other_led_on;
other_led_on = !bd2802_is_led_off(led, other_led);
if (id == LED1)
value = LED_CTL(other_led_on, 1);
else
value = LED_CTL(1 , other_led_on);
bd2802_write_byte(led->client, BD2802_REG_CONTROL, value);
}
static void bd2802_set_on(struct bd2802_led *led, enum led_ids id,
enum led_colors color)
{
u8 reg;
if (bd2802_is_all_off(led) && !led->adf_on)
bd2802_reset_cancel(led);
reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT1SETUP);
bd2802_write_byte(led->client, reg, led->rgb_current);
reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT2SETUP);
bd2802_write_byte(led->client, reg, BD2802_CURRENT_000);
reg = bd2802_get_reg_addr(id, color, BD2802_REG_WAVEPATTERN);
bd2802_write_byte(led->client, reg, BD2802_PATTERN_FULL);
bd2802_enable(led, id);
bd2802_update_state(led, id, color, BD2802_ON);
}
static void bd2802_set_blink(struct bd2802_led *led, enum led_ids id,
enum led_colors color)
{
u8 reg;
if (bd2802_is_all_off(led) && !led->adf_on)
bd2802_reset_cancel(led);
reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT1SETUP);
bd2802_write_byte(led->client, reg, BD2802_CURRENT_000);
reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT2SETUP);
bd2802_write_byte(led->client, reg, led->rgb_current);
reg = bd2802_get_reg_addr(id, color, BD2802_REG_WAVEPATTERN);
bd2802_write_byte(led->client, reg, led->wave_pattern);
bd2802_enable(led, id);
bd2802_update_state(led, id, color, BD2802_BLINK);
}
static void bd2802_turn_on(struct bd2802_led *led, enum led_ids id,
enum led_colors color, enum led_bits led_bit)
{
if (led_bit == BD2802_OFF) {
dev_err(&led->client->dev,
"Only 'blink' and 'on' are allowed\n");
return;
}
if (led_bit == BD2802_BLINK)
bd2802_set_blink(led, id, color);
else
bd2802_set_on(led, id, color);
}
static void bd2802_turn_off(struct bd2802_led *led, enum led_ids id,
enum led_colors color)
{
u8 reg;
if (bd2802_is_rgb_off(led, id, color))
return;
reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT1SETUP);
bd2802_write_byte(led->client, reg, BD2802_CURRENT_000);
reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT2SETUP);
bd2802_write_byte(led->client, reg, BD2802_CURRENT_000);
bd2802_update_state(led, id, color, BD2802_OFF);
}
#define BD2802_SET_REGISTER(reg_addr, reg_name) \
static ssize_t bd2802_store_reg##reg_addr(struct device *dev, \
struct device_attribute *attr, const char *buf, size_t count) \
{ \
struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));\
unsigned long val; \
int ret; \
if (!count) \
return -EINVAL; \
ret = kstrtoul(buf, 16, &val); \
if (ret) \
return ret; \
down_write(&led->rwsem); \
bd2802_write_byte(led->client, reg_addr, (u8) val); \
up_write(&led->rwsem); \
return count; \
} \
static struct device_attribute bd2802_reg##reg_addr##_attr = { \
.attr = {.name = reg_name, .mode = 0644}, \
.store = bd2802_store_reg##reg_addr, \
};
BD2802_SET_REGISTER(0x00, "0x00");
BD2802_SET_REGISTER(0x01, "0x01");
BD2802_SET_REGISTER(0x02, "0x02");
BD2802_SET_REGISTER(0x03, "0x03");
BD2802_SET_REGISTER(0x04, "0x04");
BD2802_SET_REGISTER(0x05, "0x05");
BD2802_SET_REGISTER(0x06, "0x06");
BD2802_SET_REGISTER(0x07, "0x07");
BD2802_SET_REGISTER(0x08, "0x08");
BD2802_SET_REGISTER(0x09, "0x09");
BD2802_SET_REGISTER(0x0a, "0x0a");
BD2802_SET_REGISTER(0x0b, "0x0b");
BD2802_SET_REGISTER(0x0c, "0x0c");
BD2802_SET_REGISTER(0x0d, "0x0d");
BD2802_SET_REGISTER(0x0e, "0x0e");
BD2802_SET_REGISTER(0x0f, "0x0f");
BD2802_SET_REGISTER(0x10, "0x10");
BD2802_SET_REGISTER(0x11, "0x11");
BD2802_SET_REGISTER(0x12, "0x12");
BD2802_SET_REGISTER(0x13, "0x13");
BD2802_SET_REGISTER(0x14, "0x14");
BD2802_SET_REGISTER(0x15, "0x15");
static struct device_attribute *bd2802_addr_attributes[] = {
&bd2802_reg0x00_attr,
&bd2802_reg0x01_attr,
&bd2802_reg0x02_attr,
&bd2802_reg0x03_attr,
&bd2802_reg0x04_attr,
&bd2802_reg0x05_attr,
&bd2802_reg0x06_attr,
&bd2802_reg0x07_attr,
&bd2802_reg0x08_attr,
&bd2802_reg0x09_attr,
&bd2802_reg0x0a_attr,
&bd2802_reg0x0b_attr,
&bd2802_reg0x0c_attr,
&bd2802_reg0x0d_attr,
&bd2802_reg0x0e_attr,
&bd2802_reg0x0f_attr,
&bd2802_reg0x10_attr,
&bd2802_reg0x11_attr,
&bd2802_reg0x12_attr,
&bd2802_reg0x13_attr,
&bd2802_reg0x14_attr,
&bd2802_reg0x15_attr,
};
static void bd2802_enable_adv_conf(struct bd2802_led *led)
{
int i, ret;
for (i = 0; i < ARRAY_SIZE(bd2802_addr_attributes); i++) {
ret = device_create_file(&led->client->dev,
bd2802_addr_attributes[i]);
if (ret) {
dev_err(&led->client->dev, "failed: sysfs file %s\n",
bd2802_addr_attributes[i]->attr.name);
goto failed_remove_files;
}
}
if (bd2802_is_all_off(led))
bd2802_reset_cancel(led);
led->adf_on = 1;
return;
failed_remove_files:
for (i--; i >= 0; i--)
device_remove_file(&led->client->dev,
bd2802_addr_attributes[i]);
}
static void bd2802_disable_adv_conf(struct bd2802_led *led)
{
int i;
for (i = 0; i < ARRAY_SIZE(bd2802_addr_attributes); i++)
device_remove_file(&led->client->dev,
bd2802_addr_attributes[i]);
if (bd2802_is_all_off(led))
gpiod_set_value(led->reset, 1);
led->adf_on = 0;
}
static ssize_t bd2802_show_adv_conf(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));
ssize_t ret;
down_read(&led->rwsem);
if (led->adf_on)
ret = sprintf(buf, "on\n");
else
ret = sprintf(buf, "off\n");
up_read(&led->rwsem);
return ret;
}
static ssize_t bd2802_store_adv_conf(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));
if (!count)
return -EINVAL;
down_write(&led->rwsem);
if (!led->adf_on && !strncmp(buf, "on", 2))
bd2802_enable_adv_conf(led);
else if (led->adf_on && !strncmp(buf, "off", 3))
bd2802_disable_adv_conf(led);
up_write(&led->rwsem);
return count;
}
static struct device_attribute bd2802_adv_conf_attr = {
.attr = {
.name = "advanced_configuration",
.mode = 0644,
},
.show = bd2802_show_adv_conf,
.store = bd2802_store_adv_conf,
};
#define BD2802_CONTROL_ATTR(attr_name, name_str) \
static ssize_t bd2802_show_##attr_name(struct device *dev, \
struct device_attribute *attr, char *buf) \
{ \
struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));\
ssize_t ret; \
down_read(&led->rwsem); \
ret = sprintf(buf, "0x%02x\n", led->attr_name); \
up_read(&led->rwsem); \
return ret; \
} \
static ssize_t bd2802_store_##attr_name(struct device *dev, \
struct device_attribute *attr, const char *buf, size_t count) \
{ \
struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));\
unsigned long val; \
int ret; \
if (!count) \
return -EINVAL; \
ret = kstrtoul(buf, 16, &val); \
if (ret) \
return ret; \
down_write(&led->rwsem); \
led->attr_name = val; \
up_write(&led->rwsem); \
return count; \
} \
static struct device_attribute bd2802_##attr_name##_attr = { \
.attr = { \
.name = name_str, \
.mode = 0644, \
}, \
.show = bd2802_show_##attr_name, \
.store = bd2802_store_##attr_name, \
};
BD2802_CONTROL_ATTR(wave_pattern, "wave_pattern");
BD2802_CONTROL_ATTR(rgb_current, "rgb_current");
static struct device_attribute *bd2802_attributes[] = {
&bd2802_adv_conf_attr,
&bd2802_wave_pattern_attr,
&bd2802_rgb_current_attr,
};
#define BD2802_CONTROL_RGBS(name, id, clr) \
static int bd2802_set_##name##_brightness(struct led_classdev *led_cdev,\
enum led_brightness value) \
{ \
struct bd2802_led *led = \
container_of(led_cdev, struct bd2802_led, cdev_##name); \
led->led_id = id; \
led->color = clr; \
if (value == LED_OFF) { \
led->state = BD2802_OFF; \
bd2802_turn_off(led, led->led_id, led->color); \
} else { \
led->state = BD2802_ON; \
bd2802_turn_on(led, led->led_id, led->color, BD2802_ON);\
} \
return 0; \
} \
static int bd2802_set_##name##_blink(struct led_classdev *led_cdev, \
unsigned long *delay_on, unsigned long *delay_off) \
{ \
struct bd2802_led *led = \
container_of(led_cdev, struct bd2802_led, cdev_##name); \
if (*delay_on == 0 || *delay_off == 0) \
return -EINVAL; \
led->led_id = id; \
led->color = clr; \
led->state = BD2802_BLINK; \
bd2802_turn_on(led, led->led_id, led->color, BD2802_BLINK); \
return 0; \
}
BD2802_CONTROL_RGBS(led1r, LED1, RED);
BD2802_CONTROL_RGBS(led1g, LED1, GREEN);
BD2802_CONTROL_RGBS(led1b, LED1, BLUE);
BD2802_CONTROL_RGBS(led2r, LED2, RED);
BD2802_CONTROL_RGBS(led2g, LED2, GREEN);
BD2802_CONTROL_RGBS(led2b, LED2, BLUE);
static int bd2802_register_led_classdev(struct bd2802_led *led)
{
int ret;
led->cdev_led1r.name = "led1_R";
led->cdev_led1r.brightness = LED_OFF;
led->cdev_led1r.brightness_set_blocking = bd2802_set_led1r_brightness;
led->cdev_led1r.blink_set = bd2802_set_led1r_blink;
ret = led_classdev_register(&led->client->dev, &led->cdev_led1r);
if (ret < 0) {
dev_err(&led->client->dev, "couldn't register LED %s\n",
led->cdev_led1r.name);
goto failed_unregister_led1_R;
}
led->cdev_led1g.name = "led1_G";
led->cdev_led1g.brightness = LED_OFF;
led->cdev_led1g.brightness_set_blocking = bd2802_set_led1g_brightness;
led->cdev_led1g.blink_set = bd2802_set_led1g_blink;
ret = led_classdev_register(&led->client->dev, &led->cdev_led1g);
if (ret < 0) {
dev_err(&led->client->dev, "couldn't register LED %s\n",
led->cdev_led1g.name);
goto failed_unregister_led1_G;
}
led->cdev_led1b.name = "led1_B";
led->cdev_led1b.brightness = LED_OFF;
led->cdev_led1b.brightness_set_blocking = bd2802_set_led1b_brightness;
led->cdev_led1b.blink_set = bd2802_set_led1b_blink;
ret = led_classdev_register(&led->client->dev, &led->cdev_led1b);
if (ret < 0) {
dev_err(&led->client->dev, "couldn't register LED %s\n",
led->cdev_led1b.name);
goto failed_unregister_led1_B;
}
led->cdev_led2r.name = "led2_R";
led->cdev_led2r.brightness = LED_OFF;
led->cdev_led2r.brightness_set_blocking = bd2802_set_led2r_brightness;
led->cdev_led2r.blink_set = bd2802_set_led2r_blink;
ret = led_classdev_register(&led->client->dev, &led->cdev_led2r);
if (ret < 0) {
dev_err(&led->client->dev, "couldn't register LED %s\n",
led->cdev_led2r.name);
goto failed_unregister_led2_R;
}
led->cdev_led2g.name = "led2_G";
led->cdev_led2g.brightness = LED_OFF;
led->cdev_led2g.brightness_set_blocking = bd2802_set_led2g_brightness;
led->cdev_led2g.blink_set = bd2802_set_led2g_blink;
ret = led_classdev_register(&led->client->dev, &led->cdev_led2g);
if (ret < 0) {
dev_err(&led->client->dev, "couldn't register LED %s\n",
led->cdev_led2g.name);
goto failed_unregister_led2_G;
}
led->cdev_led2b.name = "led2_B";
led->cdev_led2b.brightness = LED_OFF;
led->cdev_led2b.brightness_set_blocking = bd2802_set_led2b_brightness;
led->cdev_led2b.blink_set = bd2802_set_led2b_blink;
led->cdev_led2b.flags |= LED_CORE_SUSPENDRESUME;
ret = led_classdev_register(&led->client->dev, &led->cdev_led2b);
if (ret < 0) {
dev_err(&led->client->dev, "couldn't register LED %s\n",
led->cdev_led2b.name);
goto failed_unregister_led2_B;
}
return 0;
failed_unregister_led2_B:
led_classdev_unregister(&led->cdev_led2g);
failed_unregister_led2_G:
led_classdev_unregister(&led->cdev_led2r);
failed_unregister_led2_R:
led_classdev_unregister(&led->cdev_led1b);
failed_unregister_led1_B:
led_classdev_unregister(&led->cdev_led1g);
failed_unregister_led1_G:
led_classdev_unregister(&led->cdev_led1r);
failed_unregister_led1_R:
return ret;
}
static void bd2802_unregister_led_classdev(struct bd2802_led *led)
{
led_classdev_unregister(&led->cdev_led2b);
led_classdev_unregister(&led->cdev_led2g);
led_classdev_unregister(&led->cdev_led2r);
led_classdev_unregister(&led->cdev_led1b);
led_classdev_unregister(&led->cdev_led1g);
led_classdev_unregister(&led->cdev_led1r);
}
static int bd2802_probe(struct i2c_client *client)
{
struct bd2802_led *led;
int ret, i;
led = devm_kzalloc(&client->dev, sizeof(struct bd2802_led), GFP_KERNEL);
if (!led)
return -ENOMEM;
led->client = client;
i2c_set_clientdata(client, led);
/*
* Configure RESET GPIO (L: RESET, H: RESET cancel)
*
* We request the reset GPIO as OUT_LOW which means de-asserted,
* board files specifying this GPIO line in a machine descriptor
* table should take care to specify GPIO_ACTIVE_LOW for this line.
*/
led->reset = devm_gpiod_get(&client->dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(led->reset))
return PTR_ERR(led->reset);
/* Tacss = min 0.1ms */
udelay(100);
/* Detect BD2802GU */
ret = bd2802_write_byte(client, BD2802_REG_CLKSETUP, 0x00);
if (ret < 0) {
dev_err(&client->dev, "failed to detect device\n");
return ret;
} else
dev_info(&client->dev, "return 0x%02x\n", ret);
/* To save the power, reset BD2802 after detecting */
gpiod_set_value(led->reset, 1);
/* Default attributes */
led->wave_pattern = BD2802_PATTERN_HALF;
led->rgb_current = BD2802_CURRENT_032;
init_rwsem(&led->rwsem);
for (i = 0; i < ARRAY_SIZE(bd2802_attributes); i++) {
ret = device_create_file(&led->client->dev,
bd2802_attributes[i]);
if (ret) {
dev_err(&led->client->dev, "failed: sysfs file %s\n",
bd2802_attributes[i]->attr.name);
goto failed_unregister_dev_file;
}
}
ret = bd2802_register_led_classdev(led);
if (ret < 0)
goto failed_unregister_dev_file;
return 0;
failed_unregister_dev_file:
for (i--; i >= 0; i--)
device_remove_file(&led->client->dev, bd2802_attributes[i]);
return ret;
}
static void bd2802_remove(struct i2c_client *client)
{
struct bd2802_led *led = i2c_get_clientdata(client);
int i;
gpiod_set_value(led->reset, 1);
bd2802_unregister_led_classdev(led);
if (led->adf_on)
bd2802_disable_adv_conf(led);
for (i = 0; i < ARRAY_SIZE(bd2802_attributes); i++)
device_remove_file(&led->client->dev, bd2802_attributes[i]);
}
#ifdef CONFIG_PM_SLEEP
static void bd2802_restore_state(struct bd2802_led *led)
{
int i;
for (i = 0; i < LED_NUM; i++) {
if (led->led[i].r)
bd2802_turn_on(led, i, RED, led->led[i].r);
if (led->led[i].g)
bd2802_turn_on(led, i, GREEN, led->led[i].g);
if (led->led[i].b)
bd2802_turn_on(led, i, BLUE, led->led[i].b);
}
}
static int bd2802_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct bd2802_led *led = i2c_get_clientdata(client);
gpiod_set_value(led->reset, 1);
return 0;
}
static int bd2802_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct bd2802_led *led = i2c_get_clientdata(client);
if (!bd2802_is_all_off(led) || led->adf_on) {
bd2802_reset_cancel(led);
bd2802_restore_state(led);
}
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(bd2802_pm, bd2802_suspend, bd2802_resume);
static const struct i2c_device_id bd2802_id[] = {
{ "BD2802", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, bd2802_id);
static struct i2c_driver bd2802_i2c_driver = {
.driver = {
.name = "BD2802",
.pm = &bd2802_pm,
},
.probe = bd2802_probe,
.remove = bd2802_remove,
.id_table = bd2802_id,
};
module_i2c_driver(bd2802_i2c_driver);
MODULE_AUTHOR("Kim Kyuwon <[email protected]>");
MODULE_DESCRIPTION("BD2802 LED driver");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/leds-bd2802.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2011 ST-Ericsson SA.
* Copyright (C) 2009 Motorola, Inc.
*
* Simple driver for National Semiconductor LM3530 Backlight driver chip
*
* Author: Shreshtha Kumar SAHU <[email protected]>
* based on leds-lm3530.c by Dan Murphy <[email protected]>
*/
#include <linux/i2c.h>
#include <linux/leds.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/input.h>
#include <linux/led-lm3530.h>
#include <linux/types.h>
#include <linux/regulator/consumer.h>
#include <linux/module.h>
#define LM3530_LED_DEV "lcd-backlight"
#define LM3530_NAME "lm3530-led"
#define LM3530_GEN_CONFIG 0x10
#define LM3530_ALS_CONFIG 0x20
#define LM3530_BRT_RAMP_RATE 0x30
#define LM3530_ALS_IMP_SELECT 0x41
#define LM3530_BRT_CTRL_REG 0xA0
#define LM3530_ALS_ZB0_REG 0x60
#define LM3530_ALS_ZB1_REG 0x61
#define LM3530_ALS_ZB2_REG 0x62
#define LM3530_ALS_ZB3_REG 0x63
#define LM3530_ALS_Z0T_REG 0x70
#define LM3530_ALS_Z1T_REG 0x71
#define LM3530_ALS_Z2T_REG 0x72
#define LM3530_ALS_Z3T_REG 0x73
#define LM3530_ALS_Z4T_REG 0x74
#define LM3530_REG_MAX 14
/* General Control Register */
#define LM3530_EN_I2C_SHIFT (0)
#define LM3530_RAMP_LAW_SHIFT (1)
#define LM3530_MAX_CURR_SHIFT (2)
#define LM3530_EN_PWM_SHIFT (5)
#define LM3530_PWM_POL_SHIFT (6)
#define LM3530_EN_PWM_SIMPLE_SHIFT (7)
#define LM3530_ENABLE_I2C (1 << LM3530_EN_I2C_SHIFT)
#define LM3530_ENABLE_PWM (1 << LM3530_EN_PWM_SHIFT)
#define LM3530_POL_LOW (1 << LM3530_PWM_POL_SHIFT)
#define LM3530_ENABLE_PWM_SIMPLE (1 << LM3530_EN_PWM_SIMPLE_SHIFT)
/* ALS Config Register Options */
#define LM3530_ALS_AVG_TIME_SHIFT (0)
#define LM3530_EN_ALS_SHIFT (3)
#define LM3530_ALS_SEL_SHIFT (5)
#define LM3530_ENABLE_ALS (3 << LM3530_EN_ALS_SHIFT)
/* Brightness Ramp Rate Register */
#define LM3530_BRT_RAMP_FALL_SHIFT (0)
#define LM3530_BRT_RAMP_RISE_SHIFT (3)
/* ALS Resistor Select */
#define LM3530_ALS1_IMP_SHIFT (0)
#define LM3530_ALS2_IMP_SHIFT (4)
/* Zone Boundary Register defaults */
#define LM3530_ALS_ZB_MAX (4)
#define LM3530_ALS_WINDOW_mV (1000)
#define LM3530_ALS_OFFSET_mV (4)
/* Zone Target Register defaults */
#define LM3530_DEF_ZT_0 (0x7F)
#define LM3530_DEF_ZT_1 (0x66)
#define LM3530_DEF_ZT_2 (0x4C)
#define LM3530_DEF_ZT_3 (0x33)
#define LM3530_DEF_ZT_4 (0x19)
/* 7 bits are used for the brightness : LM3530_BRT_CTRL_REG */
#define MAX_BRIGHTNESS (127)
struct lm3530_mode_map {
const char *mode;
enum lm3530_mode mode_val;
};
static struct lm3530_mode_map mode_map[] = {
{ "man", LM3530_BL_MODE_MANUAL },
{ "als", LM3530_BL_MODE_ALS },
{ "pwm", LM3530_BL_MODE_PWM },
};
/**
* struct lm3530_data
* @led_dev: led class device
* @client: i2c client
* @pdata: LM3530 platform data
* @mode: mode of operation - manual, ALS, PWM
* @regulator: regulator
* @brightness: previous brightness value
* @enable: regulator is enabled
*/
struct lm3530_data {
struct led_classdev led_dev;
struct i2c_client *client;
struct lm3530_platform_data *pdata;
enum lm3530_mode mode;
struct regulator *regulator;
enum led_brightness brightness;
bool enable;
};
/*
* struct lm3530_als_data
* @config : value of ALS configuration register
* @imp_sel : value of ALS resistor select register
* @zone : values of ALS ZB(Zone Boundary) registers
*/
struct lm3530_als_data {
u8 config;
u8 imp_sel;
u8 zones[LM3530_ALS_ZB_MAX];
};
static const u8 lm3530_reg[LM3530_REG_MAX] = {
LM3530_GEN_CONFIG,
LM3530_ALS_CONFIG,
LM3530_BRT_RAMP_RATE,
LM3530_ALS_IMP_SELECT,
LM3530_BRT_CTRL_REG,
LM3530_ALS_ZB0_REG,
LM3530_ALS_ZB1_REG,
LM3530_ALS_ZB2_REG,
LM3530_ALS_ZB3_REG,
LM3530_ALS_Z0T_REG,
LM3530_ALS_Z1T_REG,
LM3530_ALS_Z2T_REG,
LM3530_ALS_Z3T_REG,
LM3530_ALS_Z4T_REG,
};
static int lm3530_get_mode_from_str(const char *str)
{
int i;
for (i = 0; i < ARRAY_SIZE(mode_map); i++)
if (sysfs_streq(str, mode_map[i].mode))
return mode_map[i].mode_val;
return -EINVAL;
}
static void lm3530_als_configure(struct lm3530_platform_data *pdata,
struct lm3530_als_data *als)
{
int i;
u32 als_vmin, als_vmax, als_vstep;
if (pdata->als_vmax == 0) {
pdata->als_vmin = 0;
pdata->als_vmax = LM3530_ALS_WINDOW_mV;
}
als_vmin = pdata->als_vmin;
als_vmax = pdata->als_vmax;
if ((als_vmax - als_vmin) > LM3530_ALS_WINDOW_mV)
pdata->als_vmax = als_vmax = als_vmin + LM3530_ALS_WINDOW_mV;
/* n zone boundary makes n+1 zones */
als_vstep = (als_vmax - als_vmin) / (LM3530_ALS_ZB_MAX + 1);
for (i = 0; i < LM3530_ALS_ZB_MAX; i++)
als->zones[i] = (((als_vmin + LM3530_ALS_OFFSET_mV) +
als_vstep + (i * als_vstep)) * LED_FULL) / 1000;
als->config =
(pdata->als_avrg_time << LM3530_ALS_AVG_TIME_SHIFT) |
(LM3530_ENABLE_ALS) |
(pdata->als_input_mode << LM3530_ALS_SEL_SHIFT);
als->imp_sel =
(pdata->als1_resistor_sel << LM3530_ALS1_IMP_SHIFT) |
(pdata->als2_resistor_sel << LM3530_ALS2_IMP_SHIFT);
}
static int lm3530_led_enable(struct lm3530_data *drvdata)
{
int ret;
if (drvdata->enable)
return 0;
ret = regulator_enable(drvdata->regulator);
if (ret) {
dev_err(drvdata->led_dev.dev, "Failed to enable vin:%d\n", ret);
return ret;
}
drvdata->enable = true;
return 0;
}
static void lm3530_led_disable(struct lm3530_data *drvdata)
{
int ret;
if (!drvdata->enable)
return;
ret = regulator_disable(drvdata->regulator);
if (ret) {
dev_err(drvdata->led_dev.dev, "Failed to disable vin:%d\n",
ret);
return;
}
drvdata->enable = false;
}
static int lm3530_init_registers(struct lm3530_data *drvdata)
{
int ret = 0;
int i;
u8 gen_config;
u8 brt_ramp;
u8 brightness;
u8 reg_val[LM3530_REG_MAX];
struct lm3530_platform_data *pdata = drvdata->pdata;
struct i2c_client *client = drvdata->client;
struct lm3530_pwm_data *pwm = &pdata->pwm_data;
struct lm3530_als_data als;
memset(&als, 0, sizeof(struct lm3530_als_data));
gen_config = (pdata->brt_ramp_law << LM3530_RAMP_LAW_SHIFT) |
((pdata->max_current & 7) << LM3530_MAX_CURR_SHIFT);
switch (drvdata->mode) {
case LM3530_BL_MODE_MANUAL:
gen_config |= LM3530_ENABLE_I2C;
break;
case LM3530_BL_MODE_ALS:
gen_config |= LM3530_ENABLE_I2C;
lm3530_als_configure(pdata, &als);
break;
case LM3530_BL_MODE_PWM:
gen_config |= LM3530_ENABLE_PWM | LM3530_ENABLE_PWM_SIMPLE |
(pdata->pwm_pol_hi << LM3530_PWM_POL_SHIFT);
break;
}
brt_ramp = (pdata->brt_ramp_fall << LM3530_BRT_RAMP_FALL_SHIFT) |
(pdata->brt_ramp_rise << LM3530_BRT_RAMP_RISE_SHIFT);
if (drvdata->brightness)
brightness = drvdata->brightness;
else
brightness = drvdata->brightness = pdata->brt_val;
if (brightness > drvdata->led_dev.max_brightness)
brightness = drvdata->led_dev.max_brightness;
reg_val[0] = gen_config; /* LM3530_GEN_CONFIG */
reg_val[1] = als.config; /* LM3530_ALS_CONFIG */
reg_val[2] = brt_ramp; /* LM3530_BRT_RAMP_RATE */
reg_val[3] = als.imp_sel; /* LM3530_ALS_IMP_SELECT */
reg_val[4] = brightness; /* LM3530_BRT_CTRL_REG */
reg_val[5] = als.zones[0]; /* LM3530_ALS_ZB0_REG */
reg_val[6] = als.zones[1]; /* LM3530_ALS_ZB1_REG */
reg_val[7] = als.zones[2]; /* LM3530_ALS_ZB2_REG */
reg_val[8] = als.zones[3]; /* LM3530_ALS_ZB3_REG */
reg_val[9] = LM3530_DEF_ZT_0; /* LM3530_ALS_Z0T_REG */
reg_val[10] = LM3530_DEF_ZT_1; /* LM3530_ALS_Z1T_REG */
reg_val[11] = LM3530_DEF_ZT_2; /* LM3530_ALS_Z2T_REG */
reg_val[12] = LM3530_DEF_ZT_3; /* LM3530_ALS_Z3T_REG */
reg_val[13] = LM3530_DEF_ZT_4; /* LM3530_ALS_Z4T_REG */
ret = lm3530_led_enable(drvdata);
if (ret)
return ret;
for (i = 0; i < LM3530_REG_MAX; i++) {
/* do not update brightness register when pwm mode */
if (lm3530_reg[i] == LM3530_BRT_CTRL_REG &&
drvdata->mode == LM3530_BL_MODE_PWM) {
if (pwm->pwm_set_intensity)
pwm->pwm_set_intensity(reg_val[i],
drvdata->led_dev.max_brightness);
continue;
}
ret = i2c_smbus_write_byte_data(client,
lm3530_reg[i], reg_val[i]);
if (ret)
break;
}
return ret;
}
static void lm3530_brightness_set(struct led_classdev *led_cdev,
enum led_brightness brt_val)
{
int err;
struct lm3530_data *drvdata =
container_of(led_cdev, struct lm3530_data, led_dev);
struct lm3530_platform_data *pdata = drvdata->pdata;
struct lm3530_pwm_data *pwm = &pdata->pwm_data;
u8 max_brightness = led_cdev->max_brightness;
switch (drvdata->mode) {
case LM3530_BL_MODE_MANUAL:
if (!drvdata->enable) {
err = lm3530_init_registers(drvdata);
if (err) {
dev_err(&drvdata->client->dev,
"Register Init failed: %d\n", err);
break;
}
}
/* set the brightness in brightness control register*/
err = i2c_smbus_write_byte_data(drvdata->client,
LM3530_BRT_CTRL_REG, brt_val);
if (err)
dev_err(&drvdata->client->dev,
"Unable to set brightness: %d\n", err);
else
drvdata->brightness = brt_val;
if (brt_val == 0)
lm3530_led_disable(drvdata);
break;
case LM3530_BL_MODE_ALS:
break;
case LM3530_BL_MODE_PWM:
if (pwm->pwm_set_intensity)
pwm->pwm_set_intensity(brt_val, max_brightness);
break;
default:
break;
}
}
static ssize_t mode_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct lm3530_data *drvdata;
int i, len = 0;
drvdata = container_of(led_cdev, struct lm3530_data, led_dev);
for (i = 0; i < ARRAY_SIZE(mode_map); i++)
if (drvdata->mode == mode_map[i].mode_val)
len += sprintf(buf + len, "[%s] ", mode_map[i].mode);
else
len += sprintf(buf + len, "%s ", mode_map[i].mode);
len += sprintf(buf + len, "\n");
return len;
}
static ssize_t mode_store(struct device *dev, struct device_attribute
*attr, const char *buf, size_t size)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct lm3530_data *drvdata;
struct lm3530_pwm_data *pwm;
u8 max_brightness;
int mode, err;
drvdata = container_of(led_cdev, struct lm3530_data, led_dev);
pwm = &drvdata->pdata->pwm_data;
max_brightness = led_cdev->max_brightness;
mode = lm3530_get_mode_from_str(buf);
if (mode < 0) {
dev_err(dev, "Invalid mode\n");
return mode;
}
drvdata->mode = mode;
/* set pwm to low if unnecessary */
if (mode != LM3530_BL_MODE_PWM && pwm->pwm_set_intensity)
pwm->pwm_set_intensity(0, max_brightness);
err = lm3530_init_registers(drvdata);
if (err) {
dev_err(dev, "Setting %s Mode failed :%d\n", buf, err);
return err;
}
return sizeof(drvdata->mode);
}
static DEVICE_ATTR_RW(mode);
static struct attribute *lm3530_attrs[] = {
&dev_attr_mode.attr,
NULL
};
ATTRIBUTE_GROUPS(lm3530);
static int lm3530_probe(struct i2c_client *client)
{
struct lm3530_platform_data *pdata = dev_get_platdata(&client->dev);
struct lm3530_data *drvdata;
int err = 0;
if (pdata == NULL) {
dev_err(&client->dev, "platform data required\n");
return -ENODEV;
}
/* BL mode */
if (pdata->mode > LM3530_BL_MODE_PWM) {
dev_err(&client->dev, "Illegal Mode request\n");
return -EINVAL;
}
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
dev_err(&client->dev, "I2C_FUNC_I2C not supported\n");
return -EIO;
}
drvdata = devm_kzalloc(&client->dev, sizeof(struct lm3530_data),
GFP_KERNEL);
if (drvdata == NULL)
return -ENOMEM;
drvdata->mode = pdata->mode;
drvdata->client = client;
drvdata->pdata = pdata;
drvdata->brightness = LED_OFF;
drvdata->enable = false;
drvdata->led_dev.name = LM3530_LED_DEV;
drvdata->led_dev.brightness_set = lm3530_brightness_set;
drvdata->led_dev.max_brightness = MAX_BRIGHTNESS;
drvdata->led_dev.groups = lm3530_groups;
i2c_set_clientdata(client, drvdata);
drvdata->regulator = devm_regulator_get(&client->dev, "vin");
if (IS_ERR(drvdata->regulator)) {
dev_err(&client->dev, "regulator get failed\n");
err = PTR_ERR(drvdata->regulator);
drvdata->regulator = NULL;
return err;
}
if (drvdata->pdata->brt_val) {
err = lm3530_init_registers(drvdata);
if (err < 0) {
dev_err(&client->dev,
"Register Init failed: %d\n", err);
return err;
}
}
err = led_classdev_register(&client->dev, &drvdata->led_dev);
if (err < 0) {
dev_err(&client->dev, "Register led class failed: %d\n", err);
return err;
}
return 0;
}
static void lm3530_remove(struct i2c_client *client)
{
struct lm3530_data *drvdata = i2c_get_clientdata(client);
lm3530_led_disable(drvdata);
led_classdev_unregister(&drvdata->led_dev);
}
static const struct i2c_device_id lm3530_id[] = {
{LM3530_NAME, 0},
{}
};
MODULE_DEVICE_TABLE(i2c, lm3530_id);
static struct i2c_driver lm3530_i2c_driver = {
.probe = lm3530_probe,
.remove = lm3530_remove,
.id_table = lm3530_id,
.driver = {
.name = LM3530_NAME,
},
};
module_i2c_driver(lm3530_i2c_driver);
MODULE_DESCRIPTION("Back Light driver for LM3530");
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Shreshtha Kumar SAHU <[email protected]>");
| linux-master | drivers/leds/leds-lm3530.c |
// SPDX-License-Identifier: GPL-2.0
// TI LM3697 LED chip family driver
// Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
#include <linux/bits.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/property.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/types.h>
#include <linux/leds-ti-lmu-common.h>
#define LM3697_REV 0x0
#define LM3697_RESET 0x1
#define LM3697_OUTPUT_CONFIG 0x10
#define LM3697_CTRL_A_RAMP 0x11
#define LM3697_CTRL_B_RAMP 0x12
#define LM3697_CTRL_A_B_RT_RAMP 0x13
#define LM3697_CTRL_A_B_RAMP_CFG 0x14
#define LM3697_CTRL_A_B_BRT_CFG 0x16
#define LM3697_CTRL_A_FS_CURR_CFG 0x17
#define LM3697_CTRL_B_FS_CURR_CFG 0x18
#define LM3697_PWM_CFG 0x1c
#define LM3697_CTRL_A_BRT_LSB 0x20
#define LM3697_CTRL_A_BRT_MSB 0x21
#define LM3697_CTRL_B_BRT_LSB 0x22
#define LM3697_CTRL_B_BRT_MSB 0x23
#define LM3697_CTRL_ENABLE 0x24
#define LM3697_SW_RESET BIT(0)
#define LM3697_CTRL_A_EN BIT(0)
#define LM3697_CTRL_B_EN BIT(1)
#define LM3697_CTRL_A_B_EN (LM3697_CTRL_A_EN | LM3697_CTRL_B_EN)
#define LM3697_MAX_LED_STRINGS 3
#define LM3697_CONTROL_A 0
#define LM3697_CONTROL_B 1
#define LM3697_MAX_CONTROL_BANKS 2
/**
* struct lm3697_led -
* @hvled_strings: Array of LED strings associated with a control bank
* @label: LED label
* @led_dev: LED class device
* @priv: Pointer to the device struct
* @lmu_data: Register and setting values for common code
* @control_bank: Control bank the LED is associated to. 0 is control bank A
* 1 is control bank B
* @enabled: LED brightness level (or LED_OFF)
* @num_leds: Number of LEDs available
*/
struct lm3697_led {
u32 hvled_strings[LM3697_MAX_LED_STRINGS];
char label[LED_MAX_NAME_SIZE];
struct led_classdev led_dev;
struct lm3697 *priv;
struct ti_lmu_bank lmu_data;
int control_bank;
int enabled;
int num_leds;
};
/**
* struct lm3697 -
* @enable_gpio: Hardware enable gpio
* @regulator: LED supply regulator pointer
* @client: Pointer to the I2C client
* @regmap: Devices register map
* @dev: Pointer to the devices device struct
* @lock: Lock for reading/writing the device
* @leds: Array of LED strings
* @bank_cfg: OUTPUT_CONFIG register values
* @num_banks: Number of control banks
*/
struct lm3697 {
struct gpio_desc *enable_gpio;
struct regulator *regulator;
struct i2c_client *client;
struct regmap *regmap;
struct device *dev;
struct mutex lock;
int bank_cfg;
int num_banks;
struct lm3697_led leds[];
};
static const struct reg_default lm3697_reg_defs[] = {
{LM3697_OUTPUT_CONFIG, 0x6},
{LM3697_CTRL_A_RAMP, 0x0},
{LM3697_CTRL_B_RAMP, 0x0},
{LM3697_CTRL_A_B_RT_RAMP, 0x0},
{LM3697_CTRL_A_B_RAMP_CFG, 0x0},
{LM3697_CTRL_A_B_BRT_CFG, 0x0},
{LM3697_CTRL_A_FS_CURR_CFG, 0x13},
{LM3697_CTRL_B_FS_CURR_CFG, 0x13},
{LM3697_PWM_CFG, 0xc},
{LM3697_CTRL_A_BRT_LSB, 0x0},
{LM3697_CTRL_A_BRT_MSB, 0x0},
{LM3697_CTRL_B_BRT_LSB, 0x0},
{LM3697_CTRL_B_BRT_MSB, 0x0},
{LM3697_CTRL_ENABLE, 0x0},
};
static const struct regmap_config lm3697_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = LM3697_CTRL_ENABLE,
.reg_defaults = lm3697_reg_defs,
.num_reg_defaults = ARRAY_SIZE(lm3697_reg_defs),
.cache_type = REGCACHE_FLAT,
};
static int lm3697_brightness_set(struct led_classdev *led_cdev,
enum led_brightness brt_val)
{
struct lm3697_led *led = container_of(led_cdev, struct lm3697_led,
led_dev);
int ctrl_en_val = (1 << led->control_bank);
struct device *dev = led->priv->dev;
int ret;
mutex_lock(&led->priv->lock);
if (brt_val == LED_OFF) {
ret = regmap_update_bits(led->priv->regmap, LM3697_CTRL_ENABLE,
ctrl_en_val, ~ctrl_en_val);
if (ret) {
dev_err(dev, "Cannot write ctrl register\n");
goto brightness_out;
}
led->enabled = LED_OFF;
} else {
ret = ti_lmu_common_set_brightness(&led->lmu_data, brt_val);
if (ret) {
dev_err(dev, "Cannot write brightness\n");
goto brightness_out;
}
if (!led->enabled) {
ret = regmap_update_bits(led->priv->regmap,
LM3697_CTRL_ENABLE,
ctrl_en_val, ctrl_en_val);
if (ret) {
dev_err(dev, "Cannot enable the device\n");
goto brightness_out;
}
led->enabled = brt_val;
}
}
brightness_out:
mutex_unlock(&led->priv->lock);
return ret;
}
static int lm3697_init(struct lm3697 *priv)
{
struct device *dev = priv->dev;
struct lm3697_led *led;
int i, ret;
if (priv->enable_gpio) {
gpiod_direction_output(priv->enable_gpio, 1);
} else {
ret = regmap_write(priv->regmap, LM3697_RESET, LM3697_SW_RESET);
if (ret) {
dev_err(dev, "Cannot reset the device\n");
goto out;
}
}
ret = regmap_write(priv->regmap, LM3697_CTRL_ENABLE, 0x0);
if (ret) {
dev_err(dev, "Cannot write ctrl enable\n");
goto out;
}
ret = regmap_write(priv->regmap, LM3697_OUTPUT_CONFIG, priv->bank_cfg);
if (ret)
dev_err(dev, "Cannot write OUTPUT config\n");
for (i = 0; i < priv->num_banks; i++) {
led = &priv->leds[i];
ret = ti_lmu_common_set_ramp(&led->lmu_data);
if (ret)
dev_err(dev, "Setting the ramp rate failed\n");
}
out:
return ret;
}
static int lm3697_probe_dt(struct lm3697 *priv)
{
struct fwnode_handle *child = NULL;
struct device *dev = priv->dev;
struct lm3697_led *led;
int ret = -EINVAL;
int control_bank;
size_t i = 0;
int j;
priv->enable_gpio = devm_gpiod_get_optional(dev, "enable",
GPIOD_OUT_LOW);
if (IS_ERR(priv->enable_gpio))
return dev_err_probe(dev, PTR_ERR(priv->enable_gpio),
"Failed to get enable GPIO\n");
priv->regulator = devm_regulator_get(dev, "vled");
if (IS_ERR(priv->regulator))
priv->regulator = NULL;
device_for_each_child_node(dev, child) {
struct led_init_data init_data = {};
ret = fwnode_property_read_u32(child, "reg", &control_bank);
if (ret) {
dev_err(dev, "reg property missing\n");
goto child_out;
}
if (control_bank > LM3697_CONTROL_B) {
dev_err(dev, "reg property is invalid\n");
ret = -EINVAL;
goto child_out;
}
led = &priv->leds[i];
ret = ti_lmu_common_get_brt_res(dev, child, &led->lmu_data);
if (ret)
dev_warn(dev,
"brightness resolution property missing\n");
led->control_bank = control_bank;
led->lmu_data.regmap = priv->regmap;
led->lmu_data.runtime_ramp_reg = LM3697_CTRL_A_RAMP +
control_bank;
led->lmu_data.msb_brightness_reg = LM3697_CTRL_A_BRT_MSB +
led->control_bank * 2;
led->lmu_data.lsb_brightness_reg = LM3697_CTRL_A_BRT_LSB +
led->control_bank * 2;
led->num_leds = fwnode_property_count_u32(child, "led-sources");
if (led->num_leds > LM3697_MAX_LED_STRINGS) {
dev_err(dev, "Too many LED strings defined\n");
continue;
}
ret = fwnode_property_read_u32_array(child, "led-sources",
led->hvled_strings,
led->num_leds);
if (ret) {
dev_err(dev, "led-sources property missing\n");
goto child_out;
}
for (j = 0; j < led->num_leds; j++)
priv->bank_cfg |=
(led->control_bank << led->hvled_strings[j]);
ret = ti_lmu_common_get_ramp_params(dev, child, &led->lmu_data);
if (ret)
dev_warn(dev, "runtime-ramp properties missing\n");
init_data.fwnode = child;
init_data.devicename = priv->client->name;
/* for backwards compatibility if `label` is not present */
init_data.default_label = ":";
led->priv = priv;
led->led_dev.max_brightness = led->lmu_data.max_brightness;
led->led_dev.brightness_set_blocking = lm3697_brightness_set;
ret = devm_led_classdev_register_ext(dev, &led->led_dev,
&init_data);
if (ret) {
dev_err(dev, "led register err: %d\n", ret);
goto child_out;
}
i++;
}
return ret;
child_out:
fwnode_handle_put(child);
return ret;
}
static int lm3697_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct lm3697 *led;
int count;
int ret;
count = device_get_child_node_count(dev);
if (!count || count > LM3697_MAX_CONTROL_BANKS) {
dev_err(dev, "Strange device tree!");
return -ENODEV;
}
led = devm_kzalloc(dev, struct_size(led, leds, count), GFP_KERNEL);
if (!led)
return -ENOMEM;
mutex_init(&led->lock);
i2c_set_clientdata(client, led);
led->client = client;
led->dev = dev;
led->num_banks = count;
led->regmap = devm_regmap_init_i2c(client, &lm3697_regmap_config);
if (IS_ERR(led->regmap)) {
ret = PTR_ERR(led->regmap);
dev_err(dev, "Failed to allocate register map: %d\n", ret);
return ret;
}
ret = lm3697_probe_dt(led);
if (ret)
return ret;
return lm3697_init(led);
}
static void lm3697_remove(struct i2c_client *client)
{
struct lm3697 *led = i2c_get_clientdata(client);
struct device *dev = &led->client->dev;
int ret;
ret = regmap_update_bits(led->regmap, LM3697_CTRL_ENABLE,
LM3697_CTRL_A_B_EN, 0);
if (ret)
dev_err(dev, "Failed to disable the device\n");
if (led->enable_gpio)
gpiod_direction_output(led->enable_gpio, 0);
if (led->regulator) {
ret = regulator_disable(led->regulator);
if (ret)
dev_err(dev, "Failed to disable regulator\n");
}
mutex_destroy(&led->lock);
}
static const struct i2c_device_id lm3697_id[] = {
{ "lm3697", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, lm3697_id);
static const struct of_device_id of_lm3697_leds_match[] = {
{ .compatible = "ti,lm3697", },
{},
};
MODULE_DEVICE_TABLE(of, of_lm3697_leds_match);
static struct i2c_driver lm3697_driver = {
.driver = {
.name = "lm3697",
.of_match_table = of_lm3697_leds_match,
},
.probe = lm3697_probe,
.remove = lm3697_remove,
.id_table = lm3697_id,
};
module_i2c_driver(lm3697_driver);
MODULE_DESCRIPTION("Texas Instruments LM3697 LED driver");
MODULE_AUTHOR("Dan Murphy <[email protected]>");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/leds-lm3697.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* SS4200-E Hardware API
* Copyright (c) 2009, Intel Corporation.
* Copyright IBM Corporation, 2009
*
* Author: Dave Hansen <[email protected]>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/dmi.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/types.h>
#include <linux/uaccess.h>
MODULE_AUTHOR("Rodney Girod <[email protected]>, Dave Hansen <[email protected]>");
MODULE_DESCRIPTION("Intel NAS/Home Server ICH7 GPIO Driver");
MODULE_LICENSE("GPL");
/*
* ICH7 LPC/GPIO PCI Config register offsets
*/
#define PMBASE 0x040
#define GPIO_BASE 0x048
#define GPIO_CTRL 0x04c
#define GPIO_EN 0x010
/*
* The ICH7 GPIO register block is 64 bytes in size.
*/
#define ICH7_GPIO_SIZE 64
/*
* Define register offsets within the ICH7 register block.
*/
#define GPIO_USE_SEL 0x000
#define GP_IO_SEL 0x004
#define GP_LVL 0x00c
#define GPO_BLINK 0x018
#define GPI_INV 0x030
#define GPIO_USE_SEL2 0x034
#define GP_IO_SEL2 0x038
#define GP_LVL2 0x03c
/*
* PCI ID of the Intel ICH7 LPC Device within which the GPIO block lives.
*/
static const struct pci_device_id ich7_lpc_pci_id[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_0) },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_1) },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_30) },
{ } /* NULL entry */
};
MODULE_DEVICE_TABLE(pci, ich7_lpc_pci_id);
static int __init ss4200_led_dmi_callback(const struct dmi_system_id *id)
{
pr_info("detected '%s'\n", id->ident);
return 1;
}
static bool nodetect;
module_param_named(nodetect, nodetect, bool, 0);
MODULE_PARM_DESC(nodetect, "Skip DMI-based hardware detection");
/*
* struct nas_led_whitelist - List of known good models
*
* Contains the known good models this driver is compatible with.
* When adding a new model try to be as strict as possible. This
* makes it possible to keep the false positives (the model is
* detected as working, but in reality it is not) as low as
* possible.
*/
static const struct dmi_system_id nas_led_whitelist[] __initconst = {
{
.callback = ss4200_led_dmi_callback,
.ident = "Intel SS4200-E",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Intel"),
DMI_MATCH(DMI_PRODUCT_NAME, "SS4200-E"),
DMI_MATCH(DMI_PRODUCT_VERSION, "1.00.00")
}
},
{
/*
* FUJITSU SIEMENS SCALEO Home Server/SS4200-E
* BIOS V090L 12/19/2007
*/
.callback = ss4200_led_dmi_callback,
.ident = "Fujitsu Siemens SCALEO Home Server",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
DMI_MATCH(DMI_PRODUCT_NAME, "SCALEO Home Server"),
DMI_MATCH(DMI_PRODUCT_VERSION, "1.00.00")
}
},
{}
};
/*
* Base I/O address assigned to the Power Management register block
*/
static u32 g_pm_io_base;
/*
* Base I/O address assigned to the ICH7 GPIO register block
*/
static u32 nas_gpio_io_base;
/*
* When we successfully register a region, we are returned a resource.
* We use these to identify which regions we need to release on our way
* back out.
*/
static struct resource *gp_gpio_resource;
struct nasgpio_led {
char *name;
u32 gpio_bit;
struct led_classdev led_cdev;
};
/*
* gpio_bit(s) are the ICH7 GPIO bit assignments
*/
static struct nasgpio_led nasgpio_leds[] = {
{ .name = "hdd1:blue:sata", .gpio_bit = 0 },
{ .name = "hdd1:amber:sata", .gpio_bit = 1 },
{ .name = "hdd2:blue:sata", .gpio_bit = 2 },
{ .name = "hdd2:amber:sata", .gpio_bit = 3 },
{ .name = "hdd3:blue:sata", .gpio_bit = 4 },
{ .name = "hdd3:amber:sata", .gpio_bit = 5 },
{ .name = "hdd4:blue:sata", .gpio_bit = 6 },
{ .name = "hdd4:amber:sata", .gpio_bit = 7 },
{ .name = "power:blue:power", .gpio_bit = 27},
{ .name = "power:amber:power", .gpio_bit = 28},
};
#define NAS_RECOVERY 0x00000400 /* GPIO10 */
static struct nasgpio_led *
led_classdev_to_nasgpio_led(struct led_classdev *led_cdev)
{
return container_of(led_cdev, struct nasgpio_led, led_cdev);
}
static struct nasgpio_led *get_led_named(char *name)
{
int i;
for (i = 0; i < ARRAY_SIZE(nasgpio_leds); i++) {
if (strcmp(nasgpio_leds[i].name, name))
continue;
return &nasgpio_leds[i];
}
return NULL;
}
/*
* This protects access to the gpio ports.
*/
static DEFINE_SPINLOCK(nasgpio_gpio_lock);
/*
* There are two gpio ports, one for blinking and the other
* for power. @port tells us if we're doing blinking or
* power control.
*
* Caller must hold nasgpio_gpio_lock
*/
static void __nasgpio_led_set_attr(struct led_classdev *led_cdev,
u32 port, u32 value)
{
struct nasgpio_led *led = led_classdev_to_nasgpio_led(led_cdev);
u32 gpio_out;
gpio_out = inl(nas_gpio_io_base + port);
if (value)
gpio_out |= (1<<led->gpio_bit);
else
gpio_out &= ~(1<<led->gpio_bit);
outl(gpio_out, nas_gpio_io_base + port);
}
static void nasgpio_led_set_attr(struct led_classdev *led_cdev,
u32 port, u32 value)
{
spin_lock(&nasgpio_gpio_lock);
__nasgpio_led_set_attr(led_cdev, port, value);
spin_unlock(&nasgpio_gpio_lock);
}
static u32 nasgpio_led_get_attr(struct led_classdev *led_cdev, u32 port)
{
struct nasgpio_led *led = led_classdev_to_nasgpio_led(led_cdev);
u32 gpio_in;
spin_lock(&nasgpio_gpio_lock);
gpio_in = inl(nas_gpio_io_base + port);
spin_unlock(&nasgpio_gpio_lock);
if (gpio_in & (1<<led->gpio_bit))
return 1;
return 0;
}
/*
* There is actual brightness control in the hardware,
* but it is via smbus commands and not implemented
* in this driver.
*/
static void nasgpio_led_set_brightness(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
u32 setting = 0;
if (brightness >= LED_HALF)
setting = 1;
/*
* Hold the lock across both operations. This ensures
* consistency so that both the "turn off blinking"
* and "turn light off" operations complete as a set.
*/
spin_lock(&nasgpio_gpio_lock);
/*
* LED class documentation asks that past blink state
* be disabled when brightness is turned to zero.
*/
if (brightness == 0)
__nasgpio_led_set_attr(led_cdev, GPO_BLINK, 0);
__nasgpio_led_set_attr(led_cdev, GP_LVL, setting);
spin_unlock(&nasgpio_gpio_lock);
}
static int nasgpio_led_set_blink(struct led_classdev *led_cdev,
unsigned long *delay_on,
unsigned long *delay_off)
{
u32 setting = 1;
if (!(*delay_on == 0 && *delay_off == 0) &&
!(*delay_on == 500 && *delay_off == 500))
return -EINVAL;
/*
* These are very approximate.
*/
*delay_on = 500;
*delay_off = 500;
nasgpio_led_set_attr(led_cdev, GPO_BLINK, setting);
return 0;
}
/*
* Initialize the ICH7 GPIO registers for NAS usage. The BIOS should have
* already taken care of this, but we will do so in a non destructive manner
* so that we have what we need whether the BIOS did it or not.
*/
static int ich7_gpio_init(struct device *dev)
{
int i;
u32 config_data = 0;
u32 all_nas_led = 0;
for (i = 0; i < ARRAY_SIZE(nasgpio_leds); i++)
all_nas_led |= (1<<nasgpio_leds[i].gpio_bit);
spin_lock(&nasgpio_gpio_lock);
/*
* We need to enable all of the GPIO lines used by the NAS box,
* so we will read the current Use Selection and add our usage
* to it. This should be benign with regard to the original
* BIOS configuration.
*/
config_data = inl(nas_gpio_io_base + GPIO_USE_SEL);
dev_dbg(dev, ": Data read from GPIO_USE_SEL = 0x%08x\n", config_data);
config_data |= all_nas_led + NAS_RECOVERY;
outl(config_data, nas_gpio_io_base + GPIO_USE_SEL);
config_data = inl(nas_gpio_io_base + GPIO_USE_SEL);
dev_dbg(dev, ": GPIO_USE_SEL = 0x%08x\n\n", config_data);
/*
* The LED GPIO outputs need to be configured for output, so we
* will ensure that all LED lines are cleared for output and the
* RECOVERY line ready for input. This too should be benign with
* regard to BIOS configuration.
*/
config_data = inl(nas_gpio_io_base + GP_IO_SEL);
dev_dbg(dev, ": Data read from GP_IO_SEL = 0x%08x\n",
config_data);
config_data &= ~all_nas_led;
config_data |= NAS_RECOVERY;
outl(config_data, nas_gpio_io_base + GP_IO_SEL);
config_data = inl(nas_gpio_io_base + GP_IO_SEL);
dev_dbg(dev, ": GP_IO_SEL = 0x%08x\n", config_data);
/*
* In our final system, the BIOS will initialize the state of all
* of the LEDs. For now, we turn them all off (or Low).
*/
config_data = inl(nas_gpio_io_base + GP_LVL);
dev_dbg(dev, ": Data read from GP_LVL = 0x%08x\n", config_data);
/*
* In our final system, the BIOS will initialize the blink state of all
* of the LEDs. For now, we turn blink off for all of them.
*/
config_data = inl(nas_gpio_io_base + GPO_BLINK);
dev_dbg(dev, ": Data read from GPO_BLINK = 0x%08x\n", config_data);
/*
* At this moment, I am unsure if anything needs to happen with GPI_INV
*/
config_data = inl(nas_gpio_io_base + GPI_INV);
dev_dbg(dev, ": Data read from GPI_INV = 0x%08x\n", config_data);
spin_unlock(&nasgpio_gpio_lock);
return 0;
}
static void ich7_lpc_cleanup(struct device *dev)
{
/*
* If we were given exclusive use of the GPIO
* I/O Address range, we must return it.
*/
if (gp_gpio_resource) {
dev_dbg(dev, ": Releasing GPIO I/O addresses\n");
release_region(nas_gpio_io_base, ICH7_GPIO_SIZE);
gp_gpio_resource = NULL;
}
}
/*
* The OS has determined that the LPC of the Intel ICH7 Southbridge is present
* so we can retrive the required operational information and prepare the GPIO.
*/
static struct pci_dev *nas_gpio_pci_dev;
static int ich7_lpc_probe(struct pci_dev *dev,
const struct pci_device_id *id)
{
int status;
u32 gc = 0;
status = pci_enable_device(dev);
if (status) {
dev_err(&dev->dev, "pci_enable_device failed\n");
return -EIO;
}
nas_gpio_pci_dev = dev;
status = pci_read_config_dword(dev, PMBASE, &g_pm_io_base);
if (status)
goto out;
g_pm_io_base &= 0x00000ff80;
status = pci_read_config_dword(dev, GPIO_CTRL, &gc);
if (!(GPIO_EN & gc)) {
status = -EEXIST;
dev_info(&dev->dev,
"ERROR: The LPC GPIO Block has not been enabled.\n");
goto out;
}
status = pci_read_config_dword(dev, GPIO_BASE, &nas_gpio_io_base);
if (0 > status) {
dev_info(&dev->dev, "Unable to read GPIOBASE.\n");
goto out;
}
dev_dbg(&dev->dev, ": GPIOBASE = 0x%08x\n", nas_gpio_io_base);
nas_gpio_io_base &= 0x00000ffc0;
/*
* Insure that we have exclusive access to the GPIO I/O address range.
*/
gp_gpio_resource = request_region(nas_gpio_io_base, ICH7_GPIO_SIZE,
KBUILD_MODNAME);
if (NULL == gp_gpio_resource) {
dev_info(&dev->dev,
"ERROR Unable to register GPIO I/O addresses.\n");
status = -1;
goto out;
}
/*
* Initialize the GPIO for NAS/Home Server Use
*/
ich7_gpio_init(&dev->dev);
out:
if (status) {
ich7_lpc_cleanup(&dev->dev);
pci_disable_device(dev);
}
return status;
}
static void ich7_lpc_remove(struct pci_dev *dev)
{
ich7_lpc_cleanup(&dev->dev);
pci_disable_device(dev);
}
/*
* pci_driver structure passed to the PCI modules
*/
static struct pci_driver nas_gpio_pci_driver = {
.name = KBUILD_MODNAME,
.id_table = ich7_lpc_pci_id,
.probe = ich7_lpc_probe,
.remove = ich7_lpc_remove,
};
static struct led_classdev *get_classdev_for_led_nr(int nr)
{
struct nasgpio_led *nas_led = &nasgpio_leds[nr];
struct led_classdev *led = &nas_led->led_cdev;
return led;
}
static void set_power_light_amber_noblink(void)
{
struct nasgpio_led *amber = get_led_named("power:amber:power");
struct nasgpio_led *blue = get_led_named("power:blue:power");
if (!amber || !blue)
return;
/*
* LED_OFF implies disabling future blinking
*/
pr_debug("setting blue off and amber on\n");
nasgpio_led_set_brightness(&blue->led_cdev, LED_OFF);
nasgpio_led_set_brightness(&amber->led_cdev, LED_FULL);
}
static ssize_t blink_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct led_classdev *led = dev_get_drvdata(dev);
int blinking = 0;
if (nasgpio_led_get_attr(led, GPO_BLINK))
blinking = 1;
return sprintf(buf, "%u\n", blinking);
}
static ssize_t blink_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
int ret;
struct led_classdev *led = dev_get_drvdata(dev);
unsigned long blink_state;
ret = kstrtoul(buf, 10, &blink_state);
if (ret)
return ret;
nasgpio_led_set_attr(led, GPO_BLINK, blink_state);
return size;
}
static DEVICE_ATTR_RW(blink);
static struct attribute *nasgpio_led_attrs[] = {
&dev_attr_blink.attr,
NULL
};
ATTRIBUTE_GROUPS(nasgpio_led);
static int register_nasgpio_led(int led_nr)
{
struct nasgpio_led *nas_led = &nasgpio_leds[led_nr];
struct led_classdev *led = get_classdev_for_led_nr(led_nr);
led->name = nas_led->name;
led->brightness = LED_OFF;
if (nasgpio_led_get_attr(led, GP_LVL))
led->brightness = LED_FULL;
led->brightness_set = nasgpio_led_set_brightness;
led->blink_set = nasgpio_led_set_blink;
led->groups = nasgpio_led_groups;
return led_classdev_register(&nas_gpio_pci_dev->dev, led);
}
static void unregister_nasgpio_led(int led_nr)
{
struct led_classdev *led = get_classdev_for_led_nr(led_nr);
led_classdev_unregister(led);
}
/*
* module load/initialization
*/
static int __init nas_gpio_init(void)
{
int i;
int ret = 0;
int nr_devices = 0;
nr_devices = dmi_check_system(nas_led_whitelist);
if (nodetect) {
pr_info("skipping hardware autodetection\n");
pr_info("Please send 'dmidecode' output to [email protected]\n");
nr_devices++;
}
if (nr_devices <= 0) {
pr_info("no LED devices found\n");
return -ENODEV;
}
pr_info("registering PCI driver\n");
ret = pci_register_driver(&nas_gpio_pci_driver);
if (ret)
return ret;
for (i = 0; i < ARRAY_SIZE(nasgpio_leds); i++) {
ret = register_nasgpio_led(i);
if (ret)
goto out_err;
}
/*
* When the system powers on, the BIOS leaves the power
* light blue and blinking. This will turn it solid
* amber once the driver is loaded.
*/
set_power_light_amber_noblink();
return 0;
out_err:
for (i--; i >= 0; i--)
unregister_nasgpio_led(i);
pci_unregister_driver(&nas_gpio_pci_driver);
return ret;
}
/*
* module unload
*/
static void __exit nas_gpio_exit(void)
{
int i;
pr_info("Unregistering driver\n");
for (i = 0; i < ARRAY_SIZE(nasgpio_leds); i++)
unregister_nasgpio_led(i);
pci_unregister_driver(&nas_gpio_pci_driver);
}
module_init(nas_gpio_init);
module_exit(nas_gpio_exit);
| linux-master | drivers/leds/leds-ss4200.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2006 - Florian Fainelli <[email protected]>
*
* Control the Cobalt Qube/RaQ front LED
*/
#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/types.h>
#define LED_FRONT_LEFT 0x01
#define LED_FRONT_RIGHT 0x02
static void __iomem *led_port;
static u8 led_value;
static void qube_front_led_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
if (brightness)
led_value = LED_FRONT_LEFT | LED_FRONT_RIGHT;
else
led_value = ~(LED_FRONT_LEFT | LED_FRONT_RIGHT);
writeb(led_value, led_port);
}
static struct led_classdev qube_front_led = {
.name = "qube::front",
.brightness = LED_FULL,
.brightness_set = qube_front_led_set,
.default_trigger = "default-on",
};
static int cobalt_qube_led_probe(struct platform_device *pdev)
{
struct resource *res;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
return -EBUSY;
led_port = devm_ioremap(&pdev->dev, res->start, resource_size(res));
if (!led_port)
return -ENOMEM;
led_value = LED_FRONT_LEFT | LED_FRONT_RIGHT;
writeb(led_value, led_port);
return devm_led_classdev_register(&pdev->dev, &qube_front_led);
}
static struct platform_driver cobalt_qube_led_driver = {
.probe = cobalt_qube_led_probe,
.driver = {
.name = "cobalt-qube-leds",
},
};
module_platform_driver(cobalt_qube_led_driver);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Front LED support for Cobalt Server");
MODULE_AUTHOR("Florian Fainelli <[email protected]>");
MODULE_ALIAS("platform:cobalt-qube-leds");
| linux-master | drivers/leds/leds-cobalt-qube.c |
// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2009,2018 Daniel Mack <[email protected]>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/leds.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/slab.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/property.h>
#define LED_LT3593_NAME "lt3593"
struct lt3593_led_data {
struct led_classdev cdev;
struct gpio_desc *gpiod;
};
static int lt3593_led_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
struct lt3593_led_data *led_dat =
container_of(led_cdev, struct lt3593_led_data, cdev);
int pulses;
/*
* The LT3593 resets its internal current level register to the maximum
* level on the first falling edge on the control pin. Each following
* falling edge decreases the current level by 625uA. Up to 32 pulses
* can be sent, so the maximum power reduction is 20mA.
* After a timeout of 128us, the value is taken from the register and
* applied is to the output driver.
*/
if (value == 0) {
gpiod_set_value_cansleep(led_dat->gpiod, 0);
return 0;
}
pulses = 32 - (value * 32) / 255;
if (pulses == 0) {
gpiod_set_value_cansleep(led_dat->gpiod, 0);
mdelay(1);
gpiod_set_value_cansleep(led_dat->gpiod, 1);
return 0;
}
gpiod_set_value_cansleep(led_dat->gpiod, 1);
while (pulses--) {
gpiod_set_value_cansleep(led_dat->gpiod, 0);
udelay(1);
gpiod_set_value_cansleep(led_dat->gpiod, 1);
udelay(1);
}
return 0;
}
static int lt3593_led_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct lt3593_led_data *led_data;
struct fwnode_handle *child;
int ret, state = LEDS_GPIO_DEFSTATE_OFF;
struct led_init_data init_data = {};
const char *tmp;
led_data = devm_kzalloc(dev, sizeof(*led_data), GFP_KERNEL);
if (!led_data)
return -ENOMEM;
if (device_get_child_node_count(dev) != 1) {
dev_err(dev, "Device must have exactly one LED sub-node.");
return -EINVAL;
}
led_data->gpiod = devm_gpiod_get(dev, "lltc,ctrl", 0);
if (IS_ERR(led_data->gpiod))
return PTR_ERR(led_data->gpiod);
child = device_get_next_child_node(dev, NULL);
if (!fwnode_property_read_string(child, "default-state", &tmp)) {
if (!strcmp(tmp, "on"))
state = LEDS_GPIO_DEFSTATE_ON;
}
led_data->cdev.brightness_set_blocking = lt3593_led_set;
led_data->cdev.brightness = state ? LED_FULL : LED_OFF;
init_data.fwnode = child;
init_data.devicename = LED_LT3593_NAME;
init_data.default_label = ":";
ret = devm_led_classdev_register_ext(dev, &led_data->cdev, &init_data);
fwnode_handle_put(child);
if (ret < 0)
return ret;
platform_set_drvdata(pdev, led_data);
return 0;
}
static const struct of_device_id of_lt3593_leds_match[] = {
{ .compatible = "lltc,lt3593", },
{},
};
MODULE_DEVICE_TABLE(of, of_lt3593_leds_match);
static struct platform_driver lt3593_led_driver = {
.probe = lt3593_led_probe,
.driver = {
.name = "leds-lt3593",
.of_match_table = of_lt3593_leds_match,
},
};
module_platform_driver(lt3593_led_driver);
MODULE_AUTHOR("Daniel Mack <[email protected]>");
MODULE_DESCRIPTION("LED driver for LT3593 controllers");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:leds-lt3593");
| linux-master | drivers/leds/leds-lt3593.c |
// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
//
// Copyright (c) 2018 Mellanox Technologies. All rights reserved.
// Copyright (c) 2018 Vadim Pasternak <[email protected]>
#include <linux/bitops.h>
#include <linux/device.h>
#include <linux/io.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/platform_data/mlxreg.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
/* Codes for LEDs. */
#define MLXREG_LED_OFFSET_BLINK_3HZ 0x01 /* Offset from solid: 3Hz blink */
#define MLXREG_LED_OFFSET_BLINK_6HZ 0x02 /* Offset from solid: 6Hz blink */
#define MLXREG_LED_IS_OFF 0x00 /* Off */
#define MLXREG_LED_RED_SOLID 0x05 /* Solid red */
#define MLXREG_LED_GREEN_SOLID 0x0D /* Solid green */
#define MLXREG_LED_AMBER_SOLID 0x09 /* Solid amber */
#define MLXREG_LED_BLINK_3HZ 167 /* ~167 msec off/on - HW support */
#define MLXREG_LED_BLINK_6HZ 83 /* ~83 msec off/on - HW support */
#define MLXREG_LED_CAPABILITY_CLEAR GENMASK(31, 8) /* Clear mask */
/**
* struct mlxreg_led_data - led control data:
*
* @data: led configuration data;
* @led_cdev: led class data;
* @base_color: base led color (other colors have constant offset from base);
* @led_data: led data;
* @data_parent: pointer to private device control data of parent;
* @led_cdev_name: class device name
*/
struct mlxreg_led_data {
struct mlxreg_core_data *data;
struct led_classdev led_cdev;
u8 base_color;
void *data_parent;
char led_cdev_name[MLXREG_CORE_LABEL_MAX_SIZE];
};
#define cdev_to_priv(c) container_of(c, struct mlxreg_led_data, led_cdev)
/**
* struct mlxreg_led_priv_data - platform private data:
*
* @pdev: platform device;
* @pdata: platform data;
* @access_lock: mutex for attribute IO access;
*/
struct mlxreg_led_priv_data {
struct platform_device *pdev;
struct mlxreg_core_platform_data *pdata;
struct mutex access_lock; /* protect IO operations */
};
static int
mlxreg_led_store_hw(struct mlxreg_led_data *led_data, u8 vset)
{
struct mlxreg_led_priv_data *priv = led_data->data_parent;
struct mlxreg_core_platform_data *led_pdata = priv->pdata;
struct mlxreg_core_data *data = led_data->data;
u32 regval;
u32 nib;
int ret;
/*
* Each LED is controlled through low or high nibble of the relevant
* register byte. Register offset is specified by off parameter.
* Parameter vset provides color code: 0x0 for off, 0x5 for solid red,
* 0x6 for 3Hz blink red, 0xd for solid green, 0xe for 3Hz blink
* green.
* Parameter mask specifies which nibble is used for specific LED: mask
* 0xf0 - lower nibble is to be used (bits from 0 to 3), mask 0x0f -
* higher nibble (bits from 4 to 7).
*/
mutex_lock(&priv->access_lock);
ret = regmap_read(led_pdata->regmap, data->reg, ®val);
if (ret)
goto access_error;
nib = (ror32(data->mask, data->bit) == 0xf0) ? rol32(vset, data->bit) :
rol32(vset, data->bit + 4);
regval = (regval & data->mask) | nib;
ret = regmap_write(led_pdata->regmap, data->reg, regval);
access_error:
mutex_unlock(&priv->access_lock);
return ret;
}
static enum led_brightness
mlxreg_led_get_hw(struct mlxreg_led_data *led_data)
{
struct mlxreg_led_priv_data *priv = led_data->data_parent;
struct mlxreg_core_platform_data *led_pdata = priv->pdata;
struct mlxreg_core_data *data = led_data->data;
u32 regval;
int err;
/*
* Each LED is controlled through low or high nibble of the relevant
* register byte. Register offset is specified by off parameter.
* Parameter vset provides color code: 0x0 for off, 0x5 for solid red,
* 0x6 for 3Hz blink red, 0xd for solid green, 0xe for 3Hz blink
* green.
* Parameter mask specifies which nibble is used for specific LED: mask
* 0xf0 - lower nibble is to be used (bits from 0 to 3), mask 0x0f -
* higher nibble (bits from 4 to 7).
*/
err = regmap_read(led_pdata->regmap, data->reg, ®val);
if (err < 0) {
dev_warn(led_data->led_cdev.dev, "Failed to get current brightness, error: %d\n",
err);
/* Assume the LED is OFF */
return LED_OFF;
}
regval = regval & ~data->mask;
regval = (ror32(data->mask, data->bit) == 0xf0) ? ror32(regval,
data->bit) : ror32(regval, data->bit + 4);
if (regval >= led_data->base_color &&
regval <= (led_data->base_color + MLXREG_LED_OFFSET_BLINK_6HZ))
return LED_FULL;
return LED_OFF;
}
static int
mlxreg_led_brightness_set(struct led_classdev *cled, enum led_brightness value)
{
struct mlxreg_led_data *led_data = cdev_to_priv(cled);
if (value)
return mlxreg_led_store_hw(led_data, led_data->base_color);
else
return mlxreg_led_store_hw(led_data, MLXREG_LED_IS_OFF);
}
static enum led_brightness
mlxreg_led_brightness_get(struct led_classdev *cled)
{
struct mlxreg_led_data *led_data = cdev_to_priv(cled);
return mlxreg_led_get_hw(led_data);
}
static int
mlxreg_led_blink_set(struct led_classdev *cled, unsigned long *delay_on,
unsigned long *delay_off)
{
struct mlxreg_led_data *led_data = cdev_to_priv(cled);
int err;
/*
* HW supports two types of blinking: full (6Hz) and half (3Hz).
* For delay on/off zero LED is setting to solid color. For others
* combination blinking is to be controlled by the software timer.
*/
if (!(*delay_on == 0 && *delay_off == 0) &&
!(*delay_on == MLXREG_LED_BLINK_3HZ &&
*delay_off == MLXREG_LED_BLINK_3HZ) &&
!(*delay_on == MLXREG_LED_BLINK_6HZ &&
*delay_off == MLXREG_LED_BLINK_6HZ))
return -EINVAL;
if (*delay_on == MLXREG_LED_BLINK_6HZ)
err = mlxreg_led_store_hw(led_data, led_data->base_color +
MLXREG_LED_OFFSET_BLINK_6HZ);
else if (*delay_on == MLXREG_LED_BLINK_3HZ)
err = mlxreg_led_store_hw(led_data, led_data->base_color +
MLXREG_LED_OFFSET_BLINK_3HZ);
else
err = mlxreg_led_store_hw(led_data, led_data->base_color);
return err;
}
static int mlxreg_led_config(struct mlxreg_led_priv_data *priv)
{
struct mlxreg_core_platform_data *led_pdata = priv->pdata;
struct mlxreg_core_data *data = led_pdata->data;
struct mlxreg_led_data *led_data;
struct led_classdev *led_cdev;
enum led_brightness brightness;
u32 regval;
int i;
int err;
for (i = 0; i < led_pdata->counter; i++, data++) {
led_data = devm_kzalloc(&priv->pdev->dev, sizeof(*led_data),
GFP_KERNEL);
if (!led_data)
return -ENOMEM;
if (data->capability) {
err = regmap_read(led_pdata->regmap, data->capability,
®val);
if (err) {
dev_err(&priv->pdev->dev, "Failed to query capability register\n");
return err;
}
if (!(regval & data->bit))
continue;
/*
* Field "bit" can contain one capability bit in 0 byte
* and offset bit in 1-3 bytes. Clear capability bit and
* keep only offset bit.
*/
data->bit &= MLXREG_LED_CAPABILITY_CLEAR;
}
led_cdev = &led_data->led_cdev;
led_data->data_parent = priv;
if (strstr(data->label, "red") ||
strstr(data->label, "orange")) {
brightness = LED_OFF;
led_data->base_color = MLXREG_LED_RED_SOLID;
} else if (strstr(data->label, "amber")) {
brightness = LED_OFF;
led_data->base_color = MLXREG_LED_AMBER_SOLID;
} else {
brightness = LED_OFF;
led_data->base_color = MLXREG_LED_GREEN_SOLID;
}
snprintf(led_data->led_cdev_name, sizeof(led_data->led_cdev_name),
"mlxreg:%s", data->label);
led_cdev->name = led_data->led_cdev_name;
led_cdev->brightness = brightness;
led_cdev->max_brightness = LED_ON;
led_cdev->brightness_set_blocking =
mlxreg_led_brightness_set;
led_cdev->brightness_get = mlxreg_led_brightness_get;
led_cdev->blink_set = mlxreg_led_blink_set;
led_cdev->flags = LED_CORE_SUSPENDRESUME;
led_data->data = data;
err = devm_led_classdev_register(&priv->pdev->dev, led_cdev);
if (err)
return err;
if (led_cdev->brightness)
mlxreg_led_brightness_set(led_cdev,
led_cdev->brightness);
dev_info(led_cdev->dev, "label: %s, mask: 0x%02x, offset:0x%02x\n",
data->label, data->mask, data->reg);
}
return 0;
}
static int mlxreg_led_probe(struct platform_device *pdev)
{
struct mlxreg_core_platform_data *led_pdata;
struct mlxreg_led_priv_data *priv;
led_pdata = dev_get_platdata(&pdev->dev);
if (!led_pdata) {
dev_err(&pdev->dev, "Failed to get platform data.\n");
return -EINVAL;
}
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
mutex_init(&priv->access_lock);
priv->pdev = pdev;
priv->pdata = led_pdata;
return mlxreg_led_config(priv);
}
static int mlxreg_led_remove(struct platform_device *pdev)
{
struct mlxreg_led_priv_data *priv = dev_get_drvdata(&pdev->dev);
mutex_destroy(&priv->access_lock);
return 0;
}
static struct platform_driver mlxreg_led_driver = {
.driver = {
.name = "leds-mlxreg",
},
.probe = mlxreg_led_probe,
.remove = mlxreg_led_remove,
};
module_platform_driver(mlxreg_led_driver);
MODULE_AUTHOR("Vadim Pasternak <[email protected]>");
MODULE_DESCRIPTION("Mellanox LED regmap driver");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_ALIAS("platform:leds-mlxreg");
| linux-master | drivers/leds/leds-mlxreg.c |
// SPDX-License-Identifier: GPL-2.0
/*
* Driver for LEDs connected to the Intel Cherry Trail Whiskey Cove PMIC
*
* Copyright 2019 Yauhen Kharuzhy <[email protected]>
* Copyright 2023 Hans de Goede <[email protected]>
*
* Register info comes from the Lenovo Yoga Book Android opensource code
* available from Lenovo. File lenovo_yb1_x90f_l_osc_201803.7z path in the 7z:
* YB1_source_code/kernel/cht/drivers/misc/charger_gp_led.c
*/
#include <linux/kernel.h>
#include <linux/leds.h>
#include <linux/mfd/intel_soc_pmic.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/suspend.h>
#define CHT_WC_LED1_CTRL 0x5e1f
#define CHT_WC_LED1_FSM 0x5e20
#define CHT_WC_LED1_PWM 0x5e21
#define CHT_WC_LED2_CTRL 0x4fdf
#define CHT_WC_LED2_FSM 0x4fe0
#define CHT_WC_LED2_PWM 0x4fe1
#define CHT_WC_LED1_SWCTL BIT(0) /* HW or SW control of charging led */
#define CHT_WC_LED1_ON BIT(1)
#define CHT_WC_LED2_ON BIT(0)
#define CHT_WC_LED_I_MA2_5 (2 << 2) /* LED current limit */
#define CHT_WC_LED_I_MASK GENMASK(3, 2) /* LED current limit mask */
#define CHT_WC_LED_F_1_4_HZ (0 << 4)
#define CHT_WC_LED_F_1_2_HZ (1 << 4)
#define CHT_WC_LED_F_1_HZ (2 << 4)
#define CHT_WC_LED_F_2_HZ (3 << 4)
#define CHT_WC_LED_F_MASK GENMASK(5, 4)
#define CHT_WC_LED_EFF_OFF (0 << 1)
#define CHT_WC_LED_EFF_ON (1 << 1)
#define CHT_WC_LED_EFF_BLINKING (2 << 1)
#define CHT_WC_LED_EFF_BREATHING (3 << 1)
#define CHT_WC_LED_EFF_MASK GENMASK(2, 1)
#define CHT_WC_LED_COUNT 2
struct cht_wc_led_regs {
/* Register addresses */
u16 ctrl;
u16 fsm;
u16 pwm;
/* Mask + values for turning the LED on/off */
u8 on_off_mask;
u8 on_val;
u8 off_val;
};
struct cht_wc_led_saved_regs {
unsigned int ctrl;
unsigned int fsm;
unsigned int pwm;
};
struct cht_wc_led {
struct led_classdev cdev;
const struct cht_wc_led_regs *regs;
struct regmap *regmap;
struct mutex mutex;
struct cht_wc_led_saved_regs saved_regs;
};
struct cht_wc_leds {
struct cht_wc_led leds[CHT_WC_LED_COUNT];
/* Saved LED1 initial register values */
struct cht_wc_led_saved_regs led1_initial_regs;
};
static const struct cht_wc_led_regs cht_wc_led_regs[CHT_WC_LED_COUNT] = {
{
.ctrl = CHT_WC_LED1_CTRL,
.fsm = CHT_WC_LED1_FSM,
.pwm = CHT_WC_LED1_PWM,
.on_off_mask = CHT_WC_LED1_SWCTL | CHT_WC_LED1_ON,
.on_val = CHT_WC_LED1_SWCTL | CHT_WC_LED1_ON,
.off_val = CHT_WC_LED1_SWCTL,
},
{
.ctrl = CHT_WC_LED2_CTRL,
.fsm = CHT_WC_LED2_FSM,
.pwm = CHT_WC_LED2_PWM,
.on_off_mask = CHT_WC_LED2_ON,
.on_val = CHT_WC_LED2_ON,
.off_val = 0,
},
};
static const char * const cht_wc_leds_names[CHT_WC_LED_COUNT] = {
"platform::" LED_FUNCTION_CHARGING,
"platform::" LED_FUNCTION_INDICATOR,
};
static int cht_wc_leds_brightness_set(struct led_classdev *cdev,
enum led_brightness value)
{
struct cht_wc_led *led = container_of(cdev, struct cht_wc_led, cdev);
int ret;
mutex_lock(&led->mutex);
if (!value) {
ret = regmap_update_bits(led->regmap, led->regs->ctrl,
led->regs->on_off_mask, led->regs->off_val);
if (ret < 0) {
dev_err(cdev->dev, "Failed to turn off: %d\n", ret);
goto out;
}
/* Disable HW blinking */
ret = regmap_update_bits(led->regmap, led->regs->fsm,
CHT_WC_LED_EFF_MASK, CHT_WC_LED_EFF_ON);
if (ret < 0)
dev_err(cdev->dev, "Failed to update LED FSM reg: %d\n", ret);
} else {
ret = regmap_write(led->regmap, led->regs->pwm, value);
if (ret < 0) {
dev_err(cdev->dev, "Failed to set brightness: %d\n", ret);
goto out;
}
ret = regmap_update_bits(led->regmap, led->regs->ctrl,
led->regs->on_off_mask, led->regs->on_val);
if (ret < 0)
dev_err(cdev->dev, "Failed to turn on: %d\n", ret);
}
out:
mutex_unlock(&led->mutex);
return ret;
}
static enum led_brightness cht_wc_leds_brightness_get(struct led_classdev *cdev)
{
struct cht_wc_led *led = container_of(cdev, struct cht_wc_led, cdev);
unsigned int val;
int ret;
mutex_lock(&led->mutex);
ret = regmap_read(led->regmap, led->regs->ctrl, &val);
if (ret < 0) {
dev_err(cdev->dev, "Failed to read LED CTRL reg: %d\n", ret);
ret = 0;
goto done;
}
val &= led->regs->on_off_mask;
if (val != led->regs->on_val) {
ret = 0;
goto done;
}
ret = regmap_read(led->regmap, led->regs->pwm, &val);
if (ret < 0) {
dev_err(cdev->dev, "Failed to read LED PWM reg: %d\n", ret);
ret = 0;
goto done;
}
ret = val;
done:
mutex_unlock(&led->mutex);
return ret;
}
/* Return blinking period for given CTRL reg value */
static unsigned long cht_wc_leds_get_period(int ctrl)
{
ctrl &= CHT_WC_LED_F_MASK;
switch (ctrl) {
case CHT_WC_LED_F_1_4_HZ:
return 1000 * 4;
case CHT_WC_LED_F_1_2_HZ:
return 1000 * 2;
case CHT_WC_LED_F_1_HZ:
return 1000;
case CHT_WC_LED_F_2_HZ:
return 1000 / 2;
}
return 0;
}
/*
* Find suitable hardware blink mode for given period.
* period < 750 ms - select 2 HZ
* 750 ms <= period < 1500 ms - select 1 HZ
* 1500 ms <= period < 3000 ms - select 1/2 HZ
* 3000 ms <= period < 5000 ms - select 1/4 HZ
* 5000 ms <= period - return -1
*/
static int cht_wc_leds_find_freq(unsigned long period)
{
if (period < 750)
return CHT_WC_LED_F_2_HZ;
else if (period < 1500)
return CHT_WC_LED_F_1_HZ;
else if (period < 3000)
return CHT_WC_LED_F_1_2_HZ;
else if (period < 5000)
return CHT_WC_LED_F_1_4_HZ;
else
return -1;
}
static int cht_wc_leds_set_effect(struct led_classdev *cdev,
unsigned long *delay_on,
unsigned long *delay_off,
u8 effect)
{
struct cht_wc_led *led = container_of(cdev, struct cht_wc_led, cdev);
int ctrl, ret;
mutex_lock(&led->mutex);
/* Blink with 1 Hz as default if nothing specified */
if (!*delay_on && !*delay_off)
*delay_on = *delay_off = 500;
ctrl = cht_wc_leds_find_freq(*delay_on + *delay_off);
if (ctrl < 0) {
/* Disable HW blinking */
ret = regmap_update_bits(led->regmap, led->regs->fsm,
CHT_WC_LED_EFF_MASK, CHT_WC_LED_EFF_ON);
if (ret < 0)
dev_err(cdev->dev, "Failed to update LED FSM reg: %d\n", ret);
/* Fallback to software timer */
*delay_on = *delay_off = 0;
ret = -EINVAL;
goto done;
}
ret = regmap_update_bits(led->regmap, led->regs->fsm,
CHT_WC_LED_EFF_MASK, effect);
if (ret < 0)
dev_err(cdev->dev, "Failed to update LED FSM reg: %d\n", ret);
/* Set the frequency and make sure the LED is on */
ret = regmap_update_bits(led->regmap, led->regs->ctrl,
CHT_WC_LED_F_MASK | led->regs->on_off_mask,
ctrl | led->regs->on_val);
if (ret < 0)
dev_err(cdev->dev, "Failed to update LED CTRL reg: %d\n", ret);
*delay_off = *delay_on = cht_wc_leds_get_period(ctrl) / 2;
done:
mutex_unlock(&led->mutex);
return ret;
}
static int cht_wc_leds_blink_set(struct led_classdev *cdev,
unsigned long *delay_on,
unsigned long *delay_off)
{
u8 effect = CHT_WC_LED_EFF_BLINKING;
/*
* The desired default behavior of LED1 / the charge LED is breathing
* while charging and on/solid when full. Since triggers cannot select
* breathing, blink_set() gets called when charging. Use slow breathing
* when the default "charging-blink-full-solid" trigger is used to
* achieve the desired default behavior.
*/
if (cdev->flags & LED_INIT_DEFAULT_TRIGGER) {
*delay_on = *delay_off = 1000;
effect = CHT_WC_LED_EFF_BREATHING;
}
return cht_wc_leds_set_effect(cdev, delay_on, delay_off, effect);
}
static int cht_wc_leds_pattern_set(struct led_classdev *cdev,
struct led_pattern *pattern,
u32 len, int repeat)
{
unsigned long delay_off, delay_on;
if (repeat > 0 || len != 2 ||
pattern[0].brightness != 0 || pattern[1].brightness != 1 ||
pattern[0].delta_t != pattern[1].delta_t ||
(pattern[0].delta_t != 250 && pattern[0].delta_t != 500 &&
pattern[0].delta_t != 1000 && pattern[0].delta_t != 2000))
return -EINVAL;
delay_off = pattern[0].delta_t;
delay_on = pattern[1].delta_t;
return cht_wc_leds_set_effect(cdev, &delay_on, &delay_off, CHT_WC_LED_EFF_BREATHING);
}
static int cht_wc_leds_pattern_clear(struct led_classdev *cdev)
{
return cht_wc_leds_brightness_set(cdev, 0);
}
static int cht_wc_led_save_regs(struct cht_wc_led *led,
struct cht_wc_led_saved_regs *saved_regs)
{
int ret;
ret = regmap_read(led->regmap, led->regs->ctrl, &saved_regs->ctrl);
if (ret < 0)
return ret;
ret = regmap_read(led->regmap, led->regs->fsm, &saved_regs->fsm);
if (ret < 0)
return ret;
return regmap_read(led->regmap, led->regs->pwm, &saved_regs->pwm);
}
static void cht_wc_led_restore_regs(struct cht_wc_led *led,
const struct cht_wc_led_saved_regs *saved_regs)
{
regmap_write(led->regmap, led->regs->ctrl, saved_regs->ctrl);
regmap_write(led->regmap, led->regs->fsm, saved_regs->fsm);
regmap_write(led->regmap, led->regs->pwm, saved_regs->pwm);
}
static int cht_wc_leds_probe(struct platform_device *pdev)
{
struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent);
struct cht_wc_leds *leds;
int ret;
int i;
/*
* On the Lenovo Yoga Tab 3 the LED1 driver output is actually
* connected to a haptic feedback motor rather then a LED.
* So do not register a LED classdev there (LED2 is unused).
*/
if (pmic->cht_wc_model == INTEL_CHT_WC_LENOVO_YT3_X90)
return -ENODEV;
leds = devm_kzalloc(&pdev->dev, sizeof(*leds), GFP_KERNEL);
if (!leds)
return -ENOMEM;
/*
* LED1 might be in hw-controlled mode when this driver gets loaded; and
* since the PMIC is always powered by the battery any changes made are
* permanent. Save LED1 regs to restore them on remove() or shutdown().
*/
leds->leds[0].regs = &cht_wc_led_regs[0];
leds->leds[0].regmap = pmic->regmap;
ret = cht_wc_led_save_regs(&leds->leds[0], &leds->led1_initial_regs);
if (ret < 0)
return ret;
/* Set LED1 default trigger based on machine model */
switch (pmic->cht_wc_model) {
case INTEL_CHT_WC_GPD_WIN_POCKET:
leds->leds[0].cdev.default_trigger = "max170xx_battery-charging-blink-full-solid";
break;
case INTEL_CHT_WC_XIAOMI_MIPAD2:
leds->leds[0].cdev.default_trigger = "bq27520-0-charging-blink-full-solid";
break;
case INTEL_CHT_WC_LENOVO_YOGABOOK1:
leds->leds[0].cdev.default_trigger = "bq27542-0-charging-blink-full-solid";
break;
default:
dev_warn(&pdev->dev, "Unknown model, no default charging trigger\n");
break;
}
for (i = 0; i < CHT_WC_LED_COUNT; i++) {
struct cht_wc_led *led = &leds->leds[i];
led->regs = &cht_wc_led_regs[i];
led->regmap = pmic->regmap;
mutex_init(&led->mutex);
led->cdev.name = cht_wc_leds_names[i];
led->cdev.brightness_set_blocking = cht_wc_leds_brightness_set;
led->cdev.brightness_get = cht_wc_leds_brightness_get;
led->cdev.blink_set = cht_wc_leds_blink_set;
led->cdev.pattern_set = cht_wc_leds_pattern_set;
led->cdev.pattern_clear = cht_wc_leds_pattern_clear;
led->cdev.max_brightness = 255;
ret = led_classdev_register(&pdev->dev, &led->cdev);
if (ret < 0)
return ret;
}
platform_set_drvdata(pdev, leds);
return 0;
}
static void cht_wc_leds_remove(struct platform_device *pdev)
{
struct cht_wc_leds *leds = platform_get_drvdata(pdev);
int i;
for (i = 0; i < CHT_WC_LED_COUNT; i++)
led_classdev_unregister(&leds->leds[i].cdev);
/* Restore LED1 regs if hw-control was active else leave LED1 off */
if (!(leds->led1_initial_regs.ctrl & CHT_WC_LED1_SWCTL))
cht_wc_led_restore_regs(&leds->leds[0], &leds->led1_initial_regs);
}
static void cht_wc_leds_disable(struct platform_device *pdev)
{
struct cht_wc_leds *leds = platform_get_drvdata(pdev);
int i;
for (i = 0; i < CHT_WC_LED_COUNT; i++)
cht_wc_leds_brightness_set(&leds->leds[i].cdev, 0);
/* Restore LED1 regs if hw-control was active else leave LED1 off */
if (!(leds->led1_initial_regs.ctrl & CHT_WC_LED1_SWCTL))
cht_wc_led_restore_regs(&leds->leds[0], &leds->led1_initial_regs);
}
/* On suspend save current settings and turn LEDs off */
static int cht_wc_leds_suspend(struct device *dev)
{
struct cht_wc_leds *leds = dev_get_drvdata(dev);
int i, ret;
for (i = 0; i < CHT_WC_LED_COUNT; i++) {
ret = cht_wc_led_save_regs(&leds->leds[i], &leds->leds[i].saved_regs);
if (ret < 0)
return ret;
}
cht_wc_leds_disable(to_platform_device(dev));
return 0;
}
/* On resume restore the saved settings */
static int cht_wc_leds_resume(struct device *dev)
{
struct cht_wc_leds *leds = dev_get_drvdata(dev);
int i;
for (i = 0; i < CHT_WC_LED_COUNT; i++)
cht_wc_led_restore_regs(&leds->leds[i], &leds->leds[i].saved_regs);
return 0;
}
static DEFINE_SIMPLE_DEV_PM_OPS(cht_wc_leds_pm, cht_wc_leds_suspend, cht_wc_leds_resume);
static struct platform_driver cht_wc_leds_driver = {
.probe = cht_wc_leds_probe,
.remove_new = cht_wc_leds_remove,
.shutdown = cht_wc_leds_disable,
.driver = {
.name = "cht_wcove_leds",
.pm = pm_sleep_ptr(&cht_wc_leds_pm),
},
};
module_platform_driver(cht_wc_leds_driver);
MODULE_ALIAS("platform:cht_wcove_leds");
MODULE_DESCRIPTION("Intel Cherry Trail Whiskey Cove PMIC LEDs driver");
MODULE_AUTHOR("Yauhen Kharuzhy <[email protected]>");
MODULE_LICENSE("GPL");
| linux-master | drivers/leds/leds-cht-wcove.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2008
* Guennadi Liakhovetski, DENX Software Engineering, <[email protected]>
*
* LED driver for the DAC124S085 SPI DAC
*/
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/spi/spi.h>
struct dac124s085_led {
struct led_classdev ldev;
struct spi_device *spi;
int id;
char name[sizeof("dac124s085-3")];
struct mutex mutex;
};
struct dac124s085 {
struct dac124s085_led leds[4];
};
#define REG_WRITE (0 << 12)
#define REG_WRITE_UPDATE (1 << 12)
#define ALL_WRITE_UPDATE (2 << 12)
#define POWER_DOWN_OUTPUT (3 << 12)
static int dac124s085_set_brightness(struct led_classdev *ldev,
enum led_brightness brightness)
{
struct dac124s085_led *led = container_of(ldev, struct dac124s085_led,
ldev);
u16 word;
int ret;
mutex_lock(&led->mutex);
word = cpu_to_le16(((led->id) << 14) | REG_WRITE_UPDATE |
(brightness & 0xfff));
ret = spi_write(led->spi, (const u8 *)&word, sizeof(word));
mutex_unlock(&led->mutex);
return ret;
}
static int dac124s085_probe(struct spi_device *spi)
{
struct dac124s085 *dac;
struct dac124s085_led *led;
int i, ret;
dac = devm_kzalloc(&spi->dev, sizeof(*dac), GFP_KERNEL);
if (!dac)
return -ENOMEM;
spi->bits_per_word = 16;
for (i = 0; i < ARRAY_SIZE(dac->leds); i++) {
led = dac->leds + i;
led->id = i;
led->spi = spi;
snprintf(led->name, sizeof(led->name), "dac124s085-%d", i);
mutex_init(&led->mutex);
led->ldev.name = led->name;
led->ldev.brightness = LED_OFF;
led->ldev.max_brightness = 0xfff;
led->ldev.brightness_set_blocking = dac124s085_set_brightness;
ret = led_classdev_register(&spi->dev, &led->ldev);
if (ret < 0)
goto eledcr;
}
spi_set_drvdata(spi, dac);
return 0;
eledcr:
while (i--)
led_classdev_unregister(&dac->leds[i].ldev);
return ret;
}
static void dac124s085_remove(struct spi_device *spi)
{
struct dac124s085 *dac = spi_get_drvdata(spi);
int i;
for (i = 0; i < ARRAY_SIZE(dac->leds); i++)
led_classdev_unregister(&dac->leds[i].ldev);
}
static struct spi_driver dac124s085_driver = {
.probe = dac124s085_probe,
.remove = dac124s085_remove,
.driver = {
.name = "dac124s085",
},
};
module_spi_driver(dac124s085_driver);
MODULE_AUTHOR("Guennadi Liakhovetski <[email protected]>");
MODULE_DESCRIPTION("DAC124S085 LED driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("spi:dac124s085");
| linux-master | drivers/leds/leds-dac124s085.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Simple driver for Texas Instruments LM3642 LED Flash driver chip
* Copyright (C) 2012 Texas Instruments
*/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/leds.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/fs.h>
#include <linux/regmap.h>
#include <linux/platform_data/leds-lm3642.h>
#define REG_FILT_TIME (0x0)
#define REG_IVFM_MODE (0x1)
#define REG_TORCH_TIME (0x6)
#define REG_FLASH (0x8)
#define REG_I_CTRL (0x9)
#define REG_ENABLE (0xA)
#define REG_FLAG (0xB)
#define REG_MAX (0xB)
#define UVLO_EN_SHIFT (7)
#define IVM_D_TH_SHIFT (2)
#define TORCH_RAMP_UP_TIME_SHIFT (3)
#define TORCH_RAMP_DN_TIME_SHIFT (0)
#define INDUCTOR_I_LIMIT_SHIFT (6)
#define FLASH_RAMP_TIME_SHIFT (3)
#define FLASH_TOUT_TIME_SHIFT (0)
#define TORCH_I_SHIFT (4)
#define FLASH_I_SHIFT (0)
#define IVFM_SHIFT (7)
#define TX_PIN_EN_SHIFT (6)
#define STROBE_PIN_EN_SHIFT (5)
#define TORCH_PIN_EN_SHIFT (4)
#define MODE_BITS_SHIFT (0)
#define UVLO_EN_MASK (0x1)
#define IVM_D_TH_MASK (0x7)
#define TORCH_RAMP_UP_TIME_MASK (0x7)
#define TORCH_RAMP_DN_TIME_MASK (0x7)
#define INDUCTOR_I_LIMIT_MASK (0x1)
#define FLASH_RAMP_TIME_MASK (0x7)
#define FLASH_TOUT_TIME_MASK (0x7)
#define TORCH_I_MASK (0x7)
#define FLASH_I_MASK (0xF)
#define IVFM_MASK (0x1)
#define TX_PIN_EN_MASK (0x1)
#define STROBE_PIN_EN_MASK (0x1)
#define TORCH_PIN_EN_MASK (0x1)
#define MODE_BITS_MASK (0x73)
#define EX_PIN_CONTROL_MASK (0x71)
#define EX_PIN_ENABLE_MASK (0x70)
enum lm3642_mode {
MODES_STASNDBY = 0,
MODES_INDIC,
MODES_TORCH,
MODES_FLASH
};
struct lm3642_chip_data {
struct device *dev;
struct led_classdev cdev_flash;
struct led_classdev cdev_torch;
struct led_classdev cdev_indicator;
u8 br_flash;
u8 br_torch;
u8 br_indicator;
enum lm3642_torch_pin_enable torch_pin;
enum lm3642_strobe_pin_enable strobe_pin;
enum lm3642_tx_pin_enable tx_pin;
struct lm3642_platform_data *pdata;
struct regmap *regmap;
struct mutex lock;
unsigned int last_flag;
};
/* chip initialize */
static int lm3642_chip_init(struct lm3642_chip_data *chip)
{
int ret;
struct lm3642_platform_data *pdata = chip->pdata;
/* set enable register */
ret = regmap_update_bits(chip->regmap, REG_ENABLE, EX_PIN_ENABLE_MASK,
pdata->tx_pin);
if (ret < 0)
dev_err(chip->dev, "Failed to update REG_ENABLE Register\n");
return ret;
}
/* chip control */
static int lm3642_control(struct lm3642_chip_data *chip,
u8 brightness, enum lm3642_mode opmode)
{
int ret;
ret = regmap_read(chip->regmap, REG_FLAG, &chip->last_flag);
if (ret < 0) {
dev_err(chip->dev, "Failed to read REG_FLAG Register\n");
return ret;
}
if (chip->last_flag)
dev_info(chip->dev, "Last FLAG is 0x%x\n", chip->last_flag);
/* brightness 0 means off-state */
if (!brightness)
opmode = MODES_STASNDBY;
switch (opmode) {
case MODES_TORCH:
ret = regmap_update_bits(chip->regmap, REG_I_CTRL,
TORCH_I_MASK << TORCH_I_SHIFT,
(brightness - 1) << TORCH_I_SHIFT);
if (chip->torch_pin)
opmode |= (TORCH_PIN_EN_MASK << TORCH_PIN_EN_SHIFT);
break;
case MODES_FLASH:
ret = regmap_update_bits(chip->regmap, REG_I_CTRL,
FLASH_I_MASK << FLASH_I_SHIFT,
(brightness - 1) << FLASH_I_SHIFT);
if (chip->strobe_pin)
opmode |= (STROBE_PIN_EN_MASK << STROBE_PIN_EN_SHIFT);
break;
case MODES_INDIC:
ret = regmap_update_bits(chip->regmap, REG_I_CTRL,
TORCH_I_MASK << TORCH_I_SHIFT,
(brightness - 1) << TORCH_I_SHIFT);
break;
case MODES_STASNDBY:
break;
default:
return -EINVAL;
}
if (ret < 0) {
dev_err(chip->dev, "Failed to write REG_I_CTRL Register\n");
return ret;
}
if (chip->tx_pin)
opmode |= (TX_PIN_EN_MASK << TX_PIN_EN_SHIFT);
ret = regmap_update_bits(chip->regmap, REG_ENABLE,
MODE_BITS_MASK << MODE_BITS_SHIFT,
opmode << MODE_BITS_SHIFT);
return ret;
}
/* torch */
/* torch pin config for lm3642 */
static ssize_t torch_pin_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
ssize_t ret;
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct lm3642_chip_data *chip =
container_of(led_cdev, struct lm3642_chip_data, cdev_indicator);
unsigned int state;
ret = kstrtouint(buf, 10, &state);
if (ret)
return ret;
if (state != 0)
state = 0x01 << TORCH_PIN_EN_SHIFT;
chip->torch_pin = state;
ret = regmap_update_bits(chip->regmap, REG_ENABLE,
TORCH_PIN_EN_MASK << TORCH_PIN_EN_SHIFT,
state);
if (ret < 0) {
dev_err(chip->dev, "%s:i2c access fail to register\n", __func__);
return ret;
}
return size;
}
static DEVICE_ATTR_WO(torch_pin);
static int lm3642_torch_brightness_set(struct led_classdev *cdev,
enum led_brightness brightness)
{
struct lm3642_chip_data *chip =
container_of(cdev, struct lm3642_chip_data, cdev_torch);
int ret;
mutex_lock(&chip->lock);
chip->br_torch = brightness;
ret = lm3642_control(chip, chip->br_torch, MODES_TORCH);
mutex_unlock(&chip->lock);
return ret;
}
/* flash */
/* strobe pin config for lm3642*/
static ssize_t strobe_pin_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
ssize_t ret;
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct lm3642_chip_data *chip =
container_of(led_cdev, struct lm3642_chip_data, cdev_indicator);
unsigned int state;
ret = kstrtouint(buf, 10, &state);
if (ret)
return ret;
if (state != 0)
state = 0x01 << STROBE_PIN_EN_SHIFT;
chip->strobe_pin = state;
ret = regmap_update_bits(chip->regmap, REG_ENABLE,
STROBE_PIN_EN_MASK << STROBE_PIN_EN_SHIFT,
state);
if (ret < 0) {
dev_err(chip->dev, "%s:i2c access fail to register\n", __func__);
return ret;
}
return size;
}
static DEVICE_ATTR_WO(strobe_pin);
static int lm3642_strobe_brightness_set(struct led_classdev *cdev,
enum led_brightness brightness)
{
struct lm3642_chip_data *chip =
container_of(cdev, struct lm3642_chip_data, cdev_flash);
int ret;
mutex_lock(&chip->lock);
chip->br_flash = brightness;
ret = lm3642_control(chip, chip->br_flash, MODES_FLASH);
mutex_unlock(&chip->lock);
return ret;
}
/* indicator */
static int lm3642_indicator_brightness_set(struct led_classdev *cdev,
enum led_brightness brightness)
{
struct lm3642_chip_data *chip =
container_of(cdev, struct lm3642_chip_data, cdev_indicator);
int ret;
mutex_lock(&chip->lock);
chip->br_indicator = brightness;
ret = lm3642_control(chip, chip->br_indicator, MODES_INDIC);
mutex_unlock(&chip->lock);
return ret;
}
static const struct regmap_config lm3642_regmap = {
.reg_bits = 8,
.val_bits = 8,
.max_register = REG_MAX,
};
static struct attribute *lm3642_flash_attrs[] = {
&dev_attr_strobe_pin.attr,
NULL
};
ATTRIBUTE_GROUPS(lm3642_flash);
static struct attribute *lm3642_torch_attrs[] = {
&dev_attr_torch_pin.attr,
NULL
};
ATTRIBUTE_GROUPS(lm3642_torch);
static int lm3642_probe(struct i2c_client *client)
{
struct lm3642_platform_data *pdata = dev_get_platdata(&client->dev);
struct lm3642_chip_data *chip;
int err;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
dev_err(&client->dev, "i2c functionality check fail.\n");
return -EOPNOTSUPP;
}
if (pdata == NULL) {
dev_err(&client->dev, "needs Platform Data.\n");
return -ENODATA;
}
chip = devm_kzalloc(&client->dev,
sizeof(struct lm3642_chip_data), GFP_KERNEL);
if (!chip)
return -ENOMEM;
chip->dev = &client->dev;
chip->pdata = pdata;
chip->tx_pin = pdata->tx_pin;
chip->torch_pin = pdata->torch_pin;
chip->strobe_pin = pdata->strobe_pin;
chip->regmap = devm_regmap_init_i2c(client, &lm3642_regmap);
if (IS_ERR(chip->regmap)) {
err = PTR_ERR(chip->regmap);
dev_err(&client->dev, "Failed to allocate register map: %d\n",
err);
return err;
}
mutex_init(&chip->lock);
i2c_set_clientdata(client, chip);
err = lm3642_chip_init(chip);
if (err < 0)
goto err_out;
/* flash */
chip->cdev_flash.name = "flash";
chip->cdev_flash.max_brightness = 16;
chip->cdev_flash.brightness_set_blocking = lm3642_strobe_brightness_set;
chip->cdev_flash.default_trigger = "flash";
chip->cdev_flash.groups = lm3642_flash_groups;
err = led_classdev_register(&client->dev, &chip->cdev_flash);
if (err < 0) {
dev_err(chip->dev, "failed to register flash\n");
goto err_out;
}
/* torch */
chip->cdev_torch.name = "torch";
chip->cdev_torch.max_brightness = 8;
chip->cdev_torch.brightness_set_blocking = lm3642_torch_brightness_set;
chip->cdev_torch.default_trigger = "torch";
chip->cdev_torch.groups = lm3642_torch_groups;
err = led_classdev_register(&client->dev, &chip->cdev_torch);
if (err < 0) {
dev_err(chip->dev, "failed to register torch\n");
goto err_create_torch_file;
}
/* indicator */
chip->cdev_indicator.name = "indicator";
chip->cdev_indicator.max_brightness = 8;
chip->cdev_indicator.brightness_set_blocking =
lm3642_indicator_brightness_set;
err = led_classdev_register(&client->dev, &chip->cdev_indicator);
if (err < 0) {
dev_err(chip->dev, "failed to register indicator\n");
goto err_create_indicator_file;
}
dev_info(&client->dev, "LM3642 is initialized\n");
return 0;
err_create_indicator_file:
led_classdev_unregister(&chip->cdev_torch);
err_create_torch_file:
led_classdev_unregister(&chip->cdev_flash);
err_out:
return err;
}
static void lm3642_remove(struct i2c_client *client)
{
struct lm3642_chip_data *chip = i2c_get_clientdata(client);
led_classdev_unregister(&chip->cdev_indicator);
led_classdev_unregister(&chip->cdev_torch);
led_classdev_unregister(&chip->cdev_flash);
regmap_write(chip->regmap, REG_ENABLE, 0);
}
static const struct i2c_device_id lm3642_id[] = {
{LM3642_NAME, 0},
{}
};
MODULE_DEVICE_TABLE(i2c, lm3642_id);
static struct i2c_driver lm3642_i2c_driver = {
.driver = {
.name = LM3642_NAME,
.pm = NULL,
},
.probe = lm3642_probe,
.remove = lm3642_remove,
.id_table = lm3642_id,
};
module_i2c_driver(lm3642_i2c_driver);
MODULE_DESCRIPTION("Texas Instruments Flash Lighting driver for LM3642");
MODULE_AUTHOR("Daniel Jeong <[email protected]>");
MODULE_AUTHOR("G.Shark Jeong <[email protected]>");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/leds-lm3642.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2011 bct electronic GmbH
* Copyright 2013 Qtechnology/AS
*
* Author: Peter Meerwald <[email protected]>
* Author: Ricardo Ribalda <[email protected]>
*
* Based on leds-pca955x.c
*
* LED driver for the PCA9633 I2C LED driver (7-bit slave address 0x62)
* LED driver for the PCA9634/5 I2C LED driver (7-bit slave address set by hw.)
*
* Note that hardware blinking violates the leds infrastructure driver
* interface since the hardware only supports blinking all LEDs with the
* same delay_on/delay_off rates. That is, only the LEDs that are set to
* blink will actually blink but all LEDs that are set to blink will blink
* in identical fashion. The delay_on/delay_off values of the last LED
* that is set to blink will be used for all of the blinking LEDs.
* Hardware blinking is disabled by default but can be enabled by setting
* the 'blink_type' member in the platform_data struct to 'PCA963X_HW_BLINK'
* or by adding the 'nxp,hw-blink' property to the DTS.
*/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/string.h>
#include <linux/ctype.h>
#include <linux/leds.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/property.h>
#include <linux/slab.h>
#include <linux/of.h>
/* LED select registers determine the source that drives LED outputs */
#define PCA963X_LED_OFF 0x0 /* LED driver off */
#define PCA963X_LED_ON 0x1 /* LED driver on */
#define PCA963X_LED_PWM 0x2 /* Controlled through PWM */
#define PCA963X_LED_GRP_PWM 0x3 /* Controlled through PWM/GRPPWM */
#define PCA963X_MODE2_OUTDRV 0x04 /* Open-drain or totem pole */
#define PCA963X_MODE2_INVRT 0x10 /* Normal or inverted direction */
#define PCA963X_MODE2_DMBLNK 0x20 /* Enable blinking */
#define PCA963X_MODE1 0x00
#define PCA963X_MODE2 0x01
#define PCA963X_PWM_BASE 0x02
enum pca963x_type {
pca9633,
pca9634,
pca9635,
};
struct pca963x_chipdef {
u8 grppwm;
u8 grpfreq;
u8 ledout_base;
int n_leds;
unsigned int scaling;
};
static struct pca963x_chipdef pca963x_chipdefs[] = {
[pca9633] = {
.grppwm = 0x6,
.grpfreq = 0x7,
.ledout_base = 0x8,
.n_leds = 4,
},
[pca9634] = {
.grppwm = 0xa,
.grpfreq = 0xb,
.ledout_base = 0xc,
.n_leds = 8,
},
[pca9635] = {
.grppwm = 0x12,
.grpfreq = 0x13,
.ledout_base = 0x14,
.n_leds = 16,
},
};
/* Total blink period in milliseconds */
#define PCA963X_BLINK_PERIOD_MIN 42
#define PCA963X_BLINK_PERIOD_MAX 10667
static const struct i2c_device_id pca963x_id[] = {
{ "pca9632", pca9633 },
{ "pca9633", pca9633 },
{ "pca9634", pca9634 },
{ "pca9635", pca9635 },
{ }
};
MODULE_DEVICE_TABLE(i2c, pca963x_id);
struct pca963x;
struct pca963x_led {
struct pca963x *chip;
struct led_classdev led_cdev;
int led_num; /* 0 .. 15 potentially */
bool blinking;
u8 gdc;
u8 gfrq;
};
struct pca963x {
struct pca963x_chipdef *chipdef;
struct mutex mutex;
struct i2c_client *client;
unsigned long leds_on;
struct pca963x_led leds[];
};
static int pca963x_brightness(struct pca963x_led *led,
enum led_brightness brightness)
{
struct i2c_client *client = led->chip->client;
struct pca963x_chipdef *chipdef = led->chip->chipdef;
u8 ledout_addr, ledout, mask, val;
int shift;
int ret;
ledout_addr = chipdef->ledout_base + (led->led_num / 4);
shift = 2 * (led->led_num % 4);
mask = 0x3 << shift;
ledout = i2c_smbus_read_byte_data(client, ledout_addr);
switch (brightness) {
case LED_FULL:
if (led->blinking) {
val = (ledout & ~mask) | (PCA963X_LED_GRP_PWM << shift);
ret = i2c_smbus_write_byte_data(client,
PCA963X_PWM_BASE +
led->led_num,
LED_FULL);
} else {
val = (ledout & ~mask) | (PCA963X_LED_ON << shift);
}
ret = i2c_smbus_write_byte_data(client, ledout_addr, val);
break;
case LED_OFF:
val = ledout & ~mask;
ret = i2c_smbus_write_byte_data(client, ledout_addr, val);
led->blinking = false;
break;
default:
ret = i2c_smbus_write_byte_data(client,
PCA963X_PWM_BASE +
led->led_num,
brightness);
if (ret < 0)
return ret;
if (led->blinking)
val = (ledout & ~mask) | (PCA963X_LED_GRP_PWM << shift);
else
val = (ledout & ~mask) | (PCA963X_LED_PWM << shift);
ret = i2c_smbus_write_byte_data(client, ledout_addr, val);
break;
}
return ret;
}
static void pca963x_blink(struct pca963x_led *led)
{
struct i2c_client *client = led->chip->client;
struct pca963x_chipdef *chipdef = led->chip->chipdef;
u8 ledout_addr, ledout, mask, val, mode2;
int shift;
ledout_addr = chipdef->ledout_base + (led->led_num / 4);
shift = 2 * (led->led_num % 4);
mask = 0x3 << shift;
mode2 = i2c_smbus_read_byte_data(client, PCA963X_MODE2);
i2c_smbus_write_byte_data(client, chipdef->grppwm, led->gdc);
i2c_smbus_write_byte_data(client, chipdef->grpfreq, led->gfrq);
if (!(mode2 & PCA963X_MODE2_DMBLNK))
i2c_smbus_write_byte_data(client, PCA963X_MODE2,
mode2 | PCA963X_MODE2_DMBLNK);
mutex_lock(&led->chip->mutex);
ledout = i2c_smbus_read_byte_data(client, ledout_addr);
if ((ledout & mask) != (PCA963X_LED_GRP_PWM << shift)) {
val = (ledout & ~mask) | (PCA963X_LED_GRP_PWM << shift);
i2c_smbus_write_byte_data(client, ledout_addr, val);
}
mutex_unlock(&led->chip->mutex);
led->blinking = true;
}
static int pca963x_power_state(struct pca963x_led *led)
{
struct i2c_client *client = led->chip->client;
unsigned long *leds_on = &led->chip->leds_on;
unsigned long cached_leds = *leds_on;
if (led->led_cdev.brightness)
set_bit(led->led_num, leds_on);
else
clear_bit(led->led_num, leds_on);
if (!(*leds_on) != !cached_leds)
return i2c_smbus_write_byte_data(client, PCA963X_MODE1,
*leds_on ? 0 : BIT(4));
return 0;
}
static int pca963x_led_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
struct pca963x_led *led;
int ret;
led = container_of(led_cdev, struct pca963x_led, led_cdev);
mutex_lock(&led->chip->mutex);
ret = pca963x_brightness(led, value);
if (ret < 0)
goto unlock;
ret = pca963x_power_state(led);
unlock:
mutex_unlock(&led->chip->mutex);
return ret;
}
static unsigned int pca963x_period_scale(struct pca963x_led *led,
unsigned int val)
{
unsigned int scaling = led->chip->chipdef->scaling;
return scaling ? DIV_ROUND_CLOSEST(val * scaling, 1000) : val;
}
static int pca963x_blink_set(struct led_classdev *led_cdev,
unsigned long *delay_on, unsigned long *delay_off)
{
unsigned long time_on, time_off, period;
struct pca963x_led *led;
u8 gdc, gfrq;
led = container_of(led_cdev, struct pca963x_led, led_cdev);
time_on = *delay_on;
time_off = *delay_off;
/* If both zero, pick reasonable defaults of 500ms each */
if (!time_on && !time_off) {
time_on = 500;
time_off = 500;
}
period = pca963x_period_scale(led, time_on + time_off);
/* If period not supported by hardware, default to someting sane. */
if ((period < PCA963X_BLINK_PERIOD_MIN) ||
(period > PCA963X_BLINK_PERIOD_MAX)) {
time_on = 500;
time_off = 500;
period = pca963x_period_scale(led, 1000);
}
/*
* From manual: duty cycle = (GDC / 256) ->
* (time_on / period) = (GDC / 256) ->
* GDC = ((time_on * 256) / period)
*/
gdc = (pca963x_period_scale(led, time_on) * 256) / period;
/*
* From manual: period = ((GFRQ + 1) / 24) in seconds.
* So, period (in ms) = (((GFRQ + 1) / 24) * 1000) ->
* GFRQ = ((period * 24 / 1000) - 1)
*/
gfrq = (period * 24 / 1000) - 1;
led->gdc = gdc;
led->gfrq = gfrq;
pca963x_blink(led);
led->led_cdev.brightness = LED_FULL;
pca963x_led_set(led_cdev, LED_FULL);
*delay_on = time_on;
*delay_off = time_off;
return 0;
}
static int pca963x_register_leds(struct i2c_client *client,
struct pca963x *chip)
{
struct pca963x_chipdef *chipdef = chip->chipdef;
struct pca963x_led *led = chip->leds;
struct device *dev = &client->dev;
struct fwnode_handle *child;
bool hw_blink;
s32 mode2;
u32 reg;
int ret;
if (device_property_read_u32(dev, "nxp,period-scale",
&chipdef->scaling))
chipdef->scaling = 1000;
hw_blink = device_property_read_bool(dev, "nxp,hw-blink");
mode2 = i2c_smbus_read_byte_data(client, PCA963X_MODE2);
if (mode2 < 0)
return mode2;
/* default to open-drain unless totem pole (push-pull) is specified */
if (device_property_read_bool(dev, "nxp,totem-pole"))
mode2 |= PCA963X_MODE2_OUTDRV;
else
mode2 &= ~PCA963X_MODE2_OUTDRV;
/* default to non-inverted output, unless inverted is specified */
if (device_property_read_bool(dev, "nxp,inverted-out"))
mode2 |= PCA963X_MODE2_INVRT;
else
mode2 &= ~PCA963X_MODE2_INVRT;
ret = i2c_smbus_write_byte_data(client, PCA963X_MODE2, mode2);
if (ret < 0)
return ret;
device_for_each_child_node(dev, child) {
struct led_init_data init_data = {};
char default_label[32];
ret = fwnode_property_read_u32(child, "reg", ®);
if (ret || reg >= chipdef->n_leds) {
dev_err(dev, "Invalid 'reg' property for node %pfw\n",
child);
ret = -EINVAL;
goto err;
}
led->led_num = reg;
led->chip = chip;
led->led_cdev.brightness_set_blocking = pca963x_led_set;
if (hw_blink)
led->led_cdev.blink_set = pca963x_blink_set;
led->blinking = false;
init_data.fwnode = child;
/* for backwards compatibility */
init_data.devicename = "pca963x";
snprintf(default_label, sizeof(default_label), "%d:%.2x:%u",
client->adapter->nr, client->addr, reg);
init_data.default_label = default_label;
ret = devm_led_classdev_register_ext(dev, &led->led_cdev,
&init_data);
if (ret) {
dev_err(dev, "Failed to register LED for node %pfw\n",
child);
goto err;
}
++led;
}
return 0;
err:
fwnode_handle_put(child);
return ret;
}
static const struct of_device_id of_pca963x_match[] = {
{ .compatible = "nxp,pca9632", },
{ .compatible = "nxp,pca9633", },
{ .compatible = "nxp,pca9634", },
{ .compatible = "nxp,pca9635", },
{},
};
MODULE_DEVICE_TABLE(of, of_pca963x_match);
static int pca963x_probe(struct i2c_client *client)
{
const struct i2c_device_id *id = i2c_client_get_device_id(client);
struct device *dev = &client->dev;
struct pca963x_chipdef *chipdef;
struct pca963x *chip;
int i, count;
chipdef = &pca963x_chipdefs[id->driver_data];
count = device_get_child_node_count(dev);
if (!count || count > chipdef->n_leds) {
dev_err(dev, "Node %pfw must define between 1 and %d LEDs\n",
dev_fwnode(dev), chipdef->n_leds);
return -EINVAL;
}
chip = devm_kzalloc(dev, struct_size(chip, leds, count), GFP_KERNEL);
if (!chip)
return -ENOMEM;
i2c_set_clientdata(client, chip);
mutex_init(&chip->mutex);
chip->chipdef = chipdef;
chip->client = client;
/* Turn off LEDs by default*/
for (i = 0; i < chipdef->n_leds / 4; i++)
i2c_smbus_write_byte_data(client, chipdef->ledout_base + i, 0x00);
/* Disable LED all-call address, and power down initially */
i2c_smbus_write_byte_data(client, PCA963X_MODE1, BIT(4));
return pca963x_register_leds(client, chip);
}
static struct i2c_driver pca963x_driver = {
.driver = {
.name = "leds-pca963x",
.of_match_table = of_pca963x_match,
},
.probe = pca963x_probe,
.id_table = pca963x_id,
};
module_i2c_driver(pca963x_driver);
MODULE_AUTHOR("Peter Meerwald <[email protected]>");
MODULE_DESCRIPTION("PCA963X LED driver");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/leds-pca963x.c |
// SPDX-License-Identifier: GPL-2.0+
//
// Driver for Panasonic AN30259A 3-channel LED driver
//
// Copyright (c) 2018 Simon Shields <[email protected]>
//
// Datasheet:
// https://www.alliedelec.com/m/d/a9d2b3ee87c2d1a535a41dd747b1c247.pdf
#include <linux/i2c.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/regmap.h>
#define AN30259A_MAX_LEDS 3
#define AN30259A_REG_SRESET 0x00
#define AN30259A_LED_SRESET BIT(0)
/* LED power registers */
#define AN30259A_REG_LED_ON 0x01
#define AN30259A_LED_EN(x) BIT((x) - 1)
#define AN30259A_LED_SLOPE(x) BIT(((x) - 1) + 4)
#define AN30259A_REG_LEDCC(x) (0x03 + ((x) - 1))
/* slope control registers */
#define AN30259A_REG_SLOPE(x) (0x06 + ((x) - 1))
#define AN30259A_LED_SLOPETIME1(x) (x)
#define AN30259A_LED_SLOPETIME2(x) ((x) << 4)
#define AN30259A_REG_LEDCNT1(x) (0x09 + (4 * ((x) - 1)))
#define AN30259A_LED_DUTYMAX(x) ((x) << 4)
#define AN30259A_LED_DUTYMID(x) (x)
#define AN30259A_REG_LEDCNT2(x) (0x0A + (4 * ((x) - 1)))
#define AN30259A_LED_DELAY(x) ((x) << 4)
#define AN30259A_LED_DUTYMIN(x) (x)
/* detention time control (length of each slope step) */
#define AN30259A_REG_LEDCNT3(x) (0x0B + (4 * ((x) - 1)))
#define AN30259A_LED_DT1(x) (x)
#define AN30259A_LED_DT2(x) ((x) << 4)
#define AN30259A_REG_LEDCNT4(x) (0x0C + (4 * ((x) - 1)))
#define AN30259A_LED_DT3(x) (x)
#define AN30259A_LED_DT4(x) ((x) << 4)
#define AN30259A_REG_MAX 0x14
#define AN30259A_BLINK_MAX_TIME 7500 /* ms */
#define AN30259A_SLOPE_RESOLUTION 500 /* ms */
#define AN30259A_NAME "an30259a"
struct an30259a;
struct an30259a_led {
struct an30259a *chip;
struct fwnode_handle *fwnode;
struct led_classdev cdev;
u32 num;
enum led_default_state default_state;
bool sloping;
};
struct an30259a {
struct mutex mutex; /* held when writing to registers */
struct i2c_client *client;
struct an30259a_led leds[AN30259A_MAX_LEDS];
struct regmap *regmap;
int num_leds;
};
static int an30259a_brightness_set(struct led_classdev *cdev,
enum led_brightness brightness)
{
struct an30259a_led *led;
int ret;
unsigned int led_on;
led = container_of(cdev, struct an30259a_led, cdev);
mutex_lock(&led->chip->mutex);
ret = regmap_read(led->chip->regmap, AN30259A_REG_LED_ON, &led_on);
if (ret)
goto error;
switch (brightness) {
case LED_OFF:
led_on &= ~AN30259A_LED_EN(led->num);
led_on &= ~AN30259A_LED_SLOPE(led->num);
led->sloping = false;
break;
default:
led_on |= AN30259A_LED_EN(led->num);
if (led->sloping)
led_on |= AN30259A_LED_SLOPE(led->num);
ret = regmap_write(led->chip->regmap,
AN30259A_REG_LEDCNT1(led->num),
AN30259A_LED_DUTYMAX(0xf) |
AN30259A_LED_DUTYMID(0xf));
if (ret)
goto error;
break;
}
ret = regmap_write(led->chip->regmap, AN30259A_REG_LED_ON, led_on);
if (ret)
goto error;
ret = regmap_write(led->chip->regmap, AN30259A_REG_LEDCC(led->num),
brightness);
error:
mutex_unlock(&led->chip->mutex);
return ret;
}
static int an30259a_blink_set(struct led_classdev *cdev,
unsigned long *delay_off, unsigned long *delay_on)
{
struct an30259a_led *led;
int ret, num;
unsigned int led_on;
unsigned long off = *delay_off, on = *delay_on;
led = container_of(cdev, struct an30259a_led, cdev);
mutex_lock(&led->chip->mutex);
num = led->num;
/* slope time can only be a multiple of 500ms. */
if (off % AN30259A_SLOPE_RESOLUTION || on % AN30259A_SLOPE_RESOLUTION) {
ret = -EINVAL;
goto error;
}
/* up to a maximum of 7500ms. */
if (off > AN30259A_BLINK_MAX_TIME || on > AN30259A_BLINK_MAX_TIME) {
ret = -EINVAL;
goto error;
}
/* if no blink specified, default to 1 Hz. */
if (!off && !on) {
*delay_off = off = 500;
*delay_on = on = 500;
}
/* convert into values the HW will understand. */
off /= AN30259A_SLOPE_RESOLUTION;
on /= AN30259A_SLOPE_RESOLUTION;
/* duty min should be zero (=off), delay should be zero. */
ret = regmap_write(led->chip->regmap, AN30259A_REG_LEDCNT2(num),
AN30259A_LED_DELAY(0) | AN30259A_LED_DUTYMIN(0));
if (ret)
goto error;
/* reset detention time (no "breathing" effect). */
ret = regmap_write(led->chip->regmap, AN30259A_REG_LEDCNT3(num),
AN30259A_LED_DT1(0) | AN30259A_LED_DT2(0));
if (ret)
goto error;
ret = regmap_write(led->chip->regmap, AN30259A_REG_LEDCNT4(num),
AN30259A_LED_DT3(0) | AN30259A_LED_DT4(0));
if (ret)
goto error;
/* slope time controls on/off cycle length. */
ret = regmap_write(led->chip->regmap, AN30259A_REG_SLOPE(num),
AN30259A_LED_SLOPETIME1(off) |
AN30259A_LED_SLOPETIME2(on));
if (ret)
goto error;
/* Finally, enable slope mode. */
ret = regmap_read(led->chip->regmap, AN30259A_REG_LED_ON, &led_on);
if (ret)
goto error;
led_on |= AN30259A_LED_SLOPE(num) | AN30259A_LED_EN(led->num);
ret = regmap_write(led->chip->regmap, AN30259A_REG_LED_ON, led_on);
if (!ret)
led->sloping = true;
error:
mutex_unlock(&led->chip->mutex);
return ret;
}
static int an30259a_dt_init(struct i2c_client *client,
struct an30259a *chip)
{
struct device_node *np = dev_of_node(&client->dev), *child;
int count, ret;
int i = 0;
struct an30259a_led *led;
count = of_get_available_child_count(np);
if (!count || count > AN30259A_MAX_LEDS)
return -EINVAL;
for_each_available_child_of_node(np, child) {
u32 source;
ret = of_property_read_u32(child, "reg", &source);
if (ret != 0 || !source || source > AN30259A_MAX_LEDS) {
dev_err(&client->dev, "Couldn't read LED address: %d\n",
ret);
count--;
continue;
}
led = &chip->leds[i];
led->num = source;
led->chip = chip;
led->fwnode = of_fwnode_handle(child);
led->default_state = led_init_default_state_get(led->fwnode);
i++;
}
if (!count)
return -EINVAL;
chip->num_leds = i;
return 0;
}
static const struct regmap_config an30259a_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = AN30259A_REG_MAX,
};
static void an30259a_init_default_state(struct an30259a_led *led)
{
struct an30259a *chip = led->chip;
int led_on, err;
switch (led->default_state) {
case LEDS_DEFSTATE_ON:
led->cdev.brightness = LED_FULL;
break;
case LEDS_DEFSTATE_KEEP:
err = regmap_read(chip->regmap, AN30259A_REG_LED_ON, &led_on);
if (err)
break;
if (!(led_on & AN30259A_LED_EN(led->num))) {
led->cdev.brightness = LED_OFF;
break;
}
regmap_read(chip->regmap, AN30259A_REG_LEDCC(led->num),
&led->cdev.brightness);
break;
default:
led->cdev.brightness = LED_OFF;
}
an30259a_brightness_set(&led->cdev, led->cdev.brightness);
}
static int an30259a_probe(struct i2c_client *client)
{
struct an30259a *chip;
int i, err;
chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
if (!chip)
return -ENOMEM;
err = an30259a_dt_init(client, chip);
if (err < 0)
return err;
mutex_init(&chip->mutex);
chip->client = client;
i2c_set_clientdata(client, chip);
chip->regmap = devm_regmap_init_i2c(client, &an30259a_regmap_config);
if (IS_ERR(chip->regmap)) {
err = PTR_ERR(chip->regmap);
dev_err(&client->dev, "Failed to allocate register map: %d\n",
err);
goto exit;
}
for (i = 0; i < chip->num_leds; i++) {
struct led_init_data init_data = {};
an30259a_init_default_state(&chip->leds[i]);
chip->leds[i].cdev.brightness_set_blocking =
an30259a_brightness_set;
chip->leds[i].cdev.blink_set = an30259a_blink_set;
init_data.fwnode = chip->leds[i].fwnode;
init_data.devicename = AN30259A_NAME;
init_data.default_label = ":";
err = devm_led_classdev_register_ext(&client->dev,
&chip->leds[i].cdev,
&init_data);
if (err < 0)
goto exit;
}
return 0;
exit:
mutex_destroy(&chip->mutex);
return err;
}
static void an30259a_remove(struct i2c_client *client)
{
struct an30259a *chip = i2c_get_clientdata(client);
mutex_destroy(&chip->mutex);
}
static const struct of_device_id an30259a_match_table[] = {
{ .compatible = "panasonic,an30259a", },
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, an30259a_match_table);
static const struct i2c_device_id an30259a_id[] = {
{ "an30259a", 0 },
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(i2c, an30259a_id);
static struct i2c_driver an30259a_driver = {
.driver = {
.name = "leds-an30259a",
.of_match_table = an30259a_match_table,
},
.probe = an30259a_probe,
.remove = an30259a_remove,
.id_table = an30259a_id,
};
module_i2c_driver(an30259a_driver);
MODULE_AUTHOR("Simon Shields <[email protected]>");
MODULE_DESCRIPTION("AN30259A LED driver");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/leds-an30259a.c |
// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (c) 2010, 2011, 2016 The Linux Foundation. All rights reserved.
*/
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/regmap.h>
#define PM8058_LED_TYPE_COMMON 0x00
#define PM8058_LED_TYPE_KEYPAD 0x01
#define PM8058_LED_TYPE_FLASH 0x02
#define PM8058_LED_TYPE_COMMON_MASK 0xf8
#define PM8058_LED_TYPE_KEYPAD_MASK 0xf0
#define PM8058_LED_TYPE_COMMON_SHIFT 3
#define PM8058_LED_TYPE_KEYPAD_SHIFT 4
struct pm8058_led {
struct regmap *map;
u32 reg;
u32 ledtype;
struct led_classdev cdev;
};
static void pm8058_led_set(struct led_classdev *cled,
enum led_brightness value)
{
struct pm8058_led *led;
int ret = 0;
unsigned int mask = 0;
unsigned int val = 0;
led = container_of(cled, struct pm8058_led, cdev);
switch (led->ledtype) {
case PM8058_LED_TYPE_COMMON:
mask = PM8058_LED_TYPE_COMMON_MASK;
val = value << PM8058_LED_TYPE_COMMON_SHIFT;
break;
case PM8058_LED_TYPE_KEYPAD:
case PM8058_LED_TYPE_FLASH:
mask = PM8058_LED_TYPE_KEYPAD_MASK;
val = value << PM8058_LED_TYPE_KEYPAD_SHIFT;
break;
default:
break;
}
ret = regmap_update_bits(led->map, led->reg, mask, val);
if (ret)
pr_err("Failed to set LED brightness\n");
}
static enum led_brightness pm8058_led_get(struct led_classdev *cled)
{
struct pm8058_led *led;
int ret;
unsigned int val;
led = container_of(cled, struct pm8058_led, cdev);
ret = regmap_read(led->map, led->reg, &val);
if (ret) {
pr_err("Failed to get LED brightness\n");
return LED_OFF;
}
switch (led->ledtype) {
case PM8058_LED_TYPE_COMMON:
val &= PM8058_LED_TYPE_COMMON_MASK;
val >>= PM8058_LED_TYPE_COMMON_SHIFT;
break;
case PM8058_LED_TYPE_KEYPAD:
case PM8058_LED_TYPE_FLASH:
val &= PM8058_LED_TYPE_KEYPAD_MASK;
val >>= PM8058_LED_TYPE_KEYPAD_SHIFT;
break;
default:
val = LED_OFF;
break;
}
return val;
}
static int pm8058_led_probe(struct platform_device *pdev)
{
struct led_init_data init_data = {};
struct device *dev = &pdev->dev;
struct pm8058_led *led;
struct device_node *np;
int ret;
struct regmap *map;
enum led_brightness maxbright;
enum led_default_state state;
led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL);
if (!led)
return -ENOMEM;
led->ledtype = (u32)(unsigned long)of_device_get_match_data(dev);
map = dev_get_regmap(dev->parent, NULL);
if (!map) {
dev_err(dev, "Parent regmap unavailable.\n");
return -ENXIO;
}
led->map = map;
np = dev_of_node(dev);
ret = of_property_read_u32(np, "reg", &led->reg);
if (ret) {
dev_err(dev, "no register offset specified\n");
return -EINVAL;
}
led->cdev.brightness_set = pm8058_led_set;
led->cdev.brightness_get = pm8058_led_get;
if (led->ledtype == PM8058_LED_TYPE_COMMON)
maxbright = 31; /* 5 bits */
else
maxbright = 15; /* 4 bits */
led->cdev.max_brightness = maxbright;
init_data.fwnode = of_fwnode_handle(np);
state = led_init_default_state_get(init_data.fwnode);
switch (state) {
case LEDS_DEFSTATE_ON:
led->cdev.brightness = maxbright;
pm8058_led_set(&led->cdev, maxbright);
break;
case LEDS_DEFSTATE_KEEP:
led->cdev.brightness = pm8058_led_get(&led->cdev);
break;
default:
led->cdev.brightness = LED_OFF;
pm8058_led_set(&led->cdev, LED_OFF);
}
if (led->ledtype == PM8058_LED_TYPE_KEYPAD ||
led->ledtype == PM8058_LED_TYPE_FLASH)
led->cdev.flags = LED_CORE_SUSPENDRESUME;
ret = devm_led_classdev_register_ext(dev, &led->cdev, &init_data);
if (ret)
dev_err(dev, "Failed to register LED for %pOF\n", np);
return ret;
}
static const struct of_device_id pm8058_leds_id_table[] = {
{
.compatible = "qcom,pm8058-led",
.data = (void *)PM8058_LED_TYPE_COMMON
},
{
.compatible = "qcom,pm8058-keypad-led",
.data = (void *)PM8058_LED_TYPE_KEYPAD
},
{
.compatible = "qcom,pm8058-flash-led",
.data = (void *)PM8058_LED_TYPE_FLASH
},
{ },
};
MODULE_DEVICE_TABLE(of, pm8058_leds_id_table);
static struct platform_driver pm8058_led_driver = {
.probe = pm8058_led_probe,
.driver = {
.name = "pm8058-leds",
.of_match_table = pm8058_leds_id_table,
},
};
module_platform_driver(pm8058_led_driver);
MODULE_DESCRIPTION("PM8058 LEDs driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:pm8058-leds");
| linux-master | drivers/leds/leds-pm8058.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Userspace driver for the LED subsystem
*
* Copyright (C) 2016 David Lechner <[email protected]>
*
* Based on uinput.c: Aristeu Sergio Rozanski Filho <[email protected]>
*/
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/leds.h>
#include <linux/miscdevice.h>
#include <linux/module.h>
#include <linux/poll.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <uapi/linux/uleds.h>
#define ULEDS_NAME "uleds"
enum uleds_state {
ULEDS_STATE_UNKNOWN,
ULEDS_STATE_REGISTERED,
};
struct uleds_device {
struct uleds_user_dev user_dev;
struct led_classdev led_cdev;
struct mutex mutex;
enum uleds_state state;
wait_queue_head_t waitq;
int brightness;
bool new_data;
};
static struct miscdevice uleds_misc;
static void uleds_brightness_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
struct uleds_device *udev = container_of(led_cdev, struct uleds_device,
led_cdev);
if (udev->brightness != brightness) {
udev->brightness = brightness;
udev->new_data = true;
wake_up_interruptible(&udev->waitq);
}
}
static int uleds_open(struct inode *inode, struct file *file)
{
struct uleds_device *udev;
udev = kzalloc(sizeof(*udev), GFP_KERNEL);
if (!udev)
return -ENOMEM;
udev->led_cdev.name = udev->user_dev.name;
udev->led_cdev.brightness_set = uleds_brightness_set;
mutex_init(&udev->mutex);
init_waitqueue_head(&udev->waitq);
udev->state = ULEDS_STATE_UNKNOWN;
file->private_data = udev;
stream_open(inode, file);
return 0;
}
static ssize_t uleds_write(struct file *file, const char __user *buffer,
size_t count, loff_t *ppos)
{
struct uleds_device *udev = file->private_data;
const char *name;
int ret;
if (count == 0)
return 0;
ret = mutex_lock_interruptible(&udev->mutex);
if (ret)
return ret;
if (udev->state == ULEDS_STATE_REGISTERED) {
ret = -EBUSY;
goto out;
}
if (count != sizeof(struct uleds_user_dev)) {
ret = -EINVAL;
goto out;
}
if (copy_from_user(&udev->user_dev, buffer,
sizeof(struct uleds_user_dev))) {
ret = -EFAULT;
goto out;
}
name = udev->user_dev.name;
if (!name[0] || !strcmp(name, ".") || !strcmp(name, "..") ||
strchr(name, '/')) {
ret = -EINVAL;
goto out;
}
if (udev->user_dev.max_brightness <= 0) {
ret = -EINVAL;
goto out;
}
udev->led_cdev.max_brightness = udev->user_dev.max_brightness;
ret = devm_led_classdev_register(uleds_misc.this_device,
&udev->led_cdev);
if (ret < 0)
goto out;
udev->new_data = true;
udev->state = ULEDS_STATE_REGISTERED;
ret = count;
out:
mutex_unlock(&udev->mutex);
return ret;
}
static ssize_t uleds_read(struct file *file, char __user *buffer, size_t count,
loff_t *ppos)
{
struct uleds_device *udev = file->private_data;
ssize_t retval;
if (count < sizeof(udev->brightness))
return 0;
do {
retval = mutex_lock_interruptible(&udev->mutex);
if (retval)
return retval;
if (udev->state != ULEDS_STATE_REGISTERED) {
retval = -ENODEV;
} else if (!udev->new_data && (file->f_flags & O_NONBLOCK)) {
retval = -EAGAIN;
} else if (udev->new_data) {
retval = copy_to_user(buffer, &udev->brightness,
sizeof(udev->brightness));
udev->new_data = false;
retval = sizeof(udev->brightness);
}
mutex_unlock(&udev->mutex);
if (retval)
break;
if (!(file->f_flags & O_NONBLOCK))
retval = wait_event_interruptible(udev->waitq,
udev->new_data ||
udev->state != ULEDS_STATE_REGISTERED);
} while (retval == 0);
return retval;
}
static __poll_t uleds_poll(struct file *file, poll_table *wait)
{
struct uleds_device *udev = file->private_data;
poll_wait(file, &udev->waitq, wait);
if (udev->new_data)
return EPOLLIN | EPOLLRDNORM;
return 0;
}
static int uleds_release(struct inode *inode, struct file *file)
{
struct uleds_device *udev = file->private_data;
if (udev->state == ULEDS_STATE_REGISTERED) {
udev->state = ULEDS_STATE_UNKNOWN;
devm_led_classdev_unregister(uleds_misc.this_device,
&udev->led_cdev);
}
kfree(udev);
return 0;
}
static const struct file_operations uleds_fops = {
.owner = THIS_MODULE,
.open = uleds_open,
.release = uleds_release,
.read = uleds_read,
.write = uleds_write,
.poll = uleds_poll,
.llseek = no_llseek,
};
static struct miscdevice uleds_misc = {
.fops = &uleds_fops,
.minor = MISC_DYNAMIC_MINOR,
.name = ULEDS_NAME,
};
module_misc_device(uleds_misc);
MODULE_AUTHOR("David Lechner <[email protected]>");
MODULE_DESCRIPTION("Userspace driver for the LED subsystem");
MODULE_LICENSE("GPL");
| linux-master | drivers/leds/uleds.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* LED driver for Mediatek MT6323 PMIC
*
* Copyright (C) 2017 Sean Wang <[email protected]>
*/
#include <linux/kernel.h>
#include <linux/leds.h>
#include <linux/mfd/mt6323/registers.h>
#include <linux/mfd/mt6397/core.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
/*
* Register field for TOP_CKPDN0 to enable
* 32K clock common for LED device.
*/
#define RG_DRV_32K_CK_PDN BIT(11)
#define RG_DRV_32K_CK_PDN_MASK BIT(11)
/* 32K/1M/6M clock common for WLED device */
#define RG_VWLED_1M_CK_PDN BIT(0)
#define RG_VWLED_32K_CK_PDN BIT(12)
#define RG_VWLED_6M_CK_PDN BIT(13)
/*
* Register field for TOP_CKPDN2 to enable
* individual clock for LED device.
*/
#define RG_ISINK_CK_PDN(i) BIT(i)
#define RG_ISINK_CK_PDN_MASK(i) BIT(i)
/*
* Register field for TOP_CKCON1 to select
* clock source.
*/
#define RG_ISINK_CK_SEL_MASK(i) (BIT(10) << (i))
#define ISINK_CON(r, i) (r + 0x8 * (i))
/* ISINK_CON0: Register to setup the duty cycle of the blink. */
#define ISINK_DIM_DUTY_MASK (0x1f << 8)
#define ISINK_DIM_DUTY(i) (((i) << 8) & ISINK_DIM_DUTY_MASK)
/* ISINK_CON1: Register to setup the period of the blink. */
#define ISINK_DIM_FSEL_MASK (0xffff)
#define ISINK_DIM_FSEL(i) ((i) & ISINK_DIM_FSEL_MASK)
/* ISINK_CON2: Register to control the brightness. */
#define ISINK_CH_STEP_SHIFT 12
#define ISINK_CH_STEP_MASK (0x7 << 12)
#define ISINK_CH_STEP(i) (((i) << 12) & ISINK_CH_STEP_MASK)
#define ISINK_SFSTR0_TC_MASK (0x3 << 1)
#define ISINK_SFSTR0_TC(i) (((i) << 1) & ISINK_SFSTR0_TC_MASK)
#define ISINK_SFSTR0_EN_MASK BIT(0)
#define ISINK_SFSTR0_EN BIT(0)
/* Register to LED channel enablement. */
#define ISINK_CH_EN_MASK(i) BIT(i)
#define ISINK_CH_EN(i) BIT(i)
#define MAX_SUPPORTED_LEDS 8
struct mt6323_leds;
/**
* struct mt6323_led - state container for the LED device
* @id: the identifier in MT6323 LED device
* @parent: the pointer to MT6323 LED controller
* @cdev: LED class device for this LED device
* @current_brightness: current state of the LED device
*/
struct mt6323_led {
int id;
struct mt6323_leds *parent;
struct led_classdev cdev;
enum led_brightness current_brightness;
};
/**
* struct mt6323_regs - register spec for the LED device
* @top_ckpdn: Offset to ISINK_CKPDN[0..x] registers
* @num_top_ckpdn: Number of ISINK_CKPDN registers
* @top_ckcon: Offset to ISINK_CKCON[0..x] registers
* @num_top_ckcon: Number of ISINK_CKCON registers
* @isink_con: Offset to ISINKx_CON[0..x] registers
* @num_isink_con: Number of ISINKx_CON registers
* @isink_max_regs: Number of ISINK[0..x] registers
* @isink_en_ctrl: Offset to ISINK_EN_CTRL register
* @iwled_en_ctrl: Offset to IWLED_EN_CTRL register
*/
struct mt6323_regs {
const u16 *top_ckpdn;
u8 num_top_ckpdn;
const u16 *top_ckcon;
u8 num_top_ckcon;
const u16 *isink_con;
u8 num_isink_con;
u8 isink_max_regs;
u16 isink_en_ctrl;
u16 iwled_en_ctrl;
};
/**
* struct mt6323_hwspec - hardware specific parameters
* @max_period: Maximum period for all LEDs
* @max_leds: Maximum number of supported LEDs
* @max_wleds: Maximum number of WLEDs
* @max_brightness: Maximum brightness for all LEDs
* @unit_duty: Steps of duty per period
*/
struct mt6323_hwspec {
u16 max_period;
u8 max_leds;
u8 max_wleds;
u16 max_brightness;
u16 unit_duty;
};
/**
* struct mt6323_data - device specific data
* @regs: Register spec for this device
* @spec: Hardware specific parameters
*/
struct mt6323_data {
const struct mt6323_regs *regs;
const struct mt6323_hwspec *spec;
};
/**
* struct mt6323_leds - state container for holding LED controller
* of the driver
* @dev: the device pointer
* @hw: the underlying hardware providing shared
* bus for the register operations
* @pdata: device specific data
* @lock: the lock among process context
* @led: the array that contains the state of individual
* LED device
*/
struct mt6323_leds {
struct device *dev;
struct mt6397_chip *hw;
const struct mt6323_data *pdata;
/* protect among process context */
struct mutex lock;
struct mt6323_led *led[MAX_SUPPORTED_LEDS];
};
static int mt6323_led_hw_brightness(struct led_classdev *cdev,
enum led_brightness brightness)
{
struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev);
struct mt6323_leds *leds = led->parent;
const struct mt6323_regs *regs = leds->pdata->regs;
struct regmap *regmap = leds->hw->regmap;
u32 con2_mask = 0, con2_val = 0;
int ret;
/*
* Setup current output for the corresponding
* brightness level.
*/
con2_mask |= ISINK_CH_STEP_MASK |
ISINK_SFSTR0_TC_MASK |
ISINK_SFSTR0_EN_MASK;
con2_val |= ISINK_CH_STEP(brightness - 1) |
ISINK_SFSTR0_TC(2) |
ISINK_SFSTR0_EN;
ret = regmap_update_bits(regmap, ISINK_CON(regs->isink_con[2], led->id),
con2_mask, con2_val);
return ret;
}
static int mt6323_led_hw_off(struct led_classdev *cdev)
{
struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev);
struct mt6323_leds *leds = led->parent;
const struct mt6323_regs *regs = leds->pdata->regs;
struct regmap *regmap = leds->hw->regmap;
unsigned int status;
int ret;
status = ISINK_CH_EN(led->id);
ret = regmap_update_bits(regmap, regs->isink_en_ctrl,
ISINK_CH_EN_MASK(led->id), ~status);
if (ret < 0)
return ret;
usleep_range(100, 300);
ret = regmap_update_bits(regmap, regs->top_ckpdn[2],
RG_ISINK_CK_PDN_MASK(led->id),
RG_ISINK_CK_PDN(led->id));
if (ret < 0)
return ret;
return 0;
}
static enum led_brightness
mt6323_get_led_hw_brightness(struct led_classdev *cdev)
{
struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev);
struct mt6323_leds *leds = led->parent;
const struct mt6323_regs *regs = leds->pdata->regs;
struct regmap *regmap = leds->hw->regmap;
unsigned int status;
int ret;
ret = regmap_read(regmap, regs->top_ckpdn[2], &status);
if (ret < 0)
return ret;
if (status & RG_ISINK_CK_PDN_MASK(led->id))
return 0;
ret = regmap_read(regmap, regs->isink_en_ctrl, &status);
if (ret < 0)
return ret;
if (!(status & ISINK_CH_EN(led->id)))
return 0;
ret = regmap_read(regmap, ISINK_CON(regs->isink_con[2], led->id), &status);
if (ret < 0)
return ret;
return ((status & ISINK_CH_STEP_MASK)
>> ISINK_CH_STEP_SHIFT) + 1;
}
static int mt6323_led_hw_on(struct led_classdev *cdev,
enum led_brightness brightness)
{
struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev);
struct mt6323_leds *leds = led->parent;
const struct mt6323_regs *regs = leds->pdata->regs;
struct regmap *regmap = leds->hw->regmap;
unsigned int status;
int ret;
/*
* Setup required clock source, enable the corresponding
* clock and channel and let work with continuous blink as
* the default.
*/
ret = regmap_update_bits(regmap, regs->top_ckcon[1],
RG_ISINK_CK_SEL_MASK(led->id), 0);
if (ret < 0)
return ret;
status = RG_ISINK_CK_PDN(led->id);
ret = regmap_update_bits(regmap, regs->top_ckpdn[2],
RG_ISINK_CK_PDN_MASK(led->id),
~status);
if (ret < 0)
return ret;
usleep_range(100, 300);
ret = regmap_update_bits(regmap, regs->isink_en_ctrl,
ISINK_CH_EN_MASK(led->id),
ISINK_CH_EN(led->id));
if (ret < 0)
return ret;
ret = mt6323_led_hw_brightness(cdev, brightness);
if (ret < 0)
return ret;
ret = regmap_update_bits(regmap, ISINK_CON(regs->isink_con[0], led->id),
ISINK_DIM_DUTY_MASK,
ISINK_DIM_DUTY(31));
if (ret < 0)
return ret;
ret = regmap_update_bits(regmap, ISINK_CON(regs->isink_con[1], led->id),
ISINK_DIM_FSEL_MASK,
ISINK_DIM_FSEL(1000));
if (ret < 0)
return ret;
return 0;
}
static int mt6323_led_set_blink(struct led_classdev *cdev,
unsigned long *delay_on,
unsigned long *delay_off)
{
struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev);
struct mt6323_leds *leds = led->parent;
const struct mt6323_regs *regs = leds->pdata->regs;
const struct mt6323_hwspec *spec = leds->pdata->spec;
struct regmap *regmap = leds->hw->regmap;
unsigned long period;
u8 duty_hw;
int ret;
/*
* LED subsystem requires a default user
* friendly blink pattern for the LED so using
* 1Hz duty cycle 50% here if without specific
* value delay_on and delay off being assigned.
*/
if (!*delay_on && !*delay_off) {
*delay_on = 500;
*delay_off = 500;
}
/*
* Units are in ms, if over the hardware able
* to support, fallback into software blink
*/
period = *delay_on + *delay_off;
if (period > spec->max_period)
return -EINVAL;
/*
* Calculate duty_hw based on the percentage of period during
* which the led is ON.
*/
duty_hw = DIV_ROUND_CLOSEST(*delay_on * 100000ul, period * spec->unit_duty);
/* hardware doesn't support zero duty cycle. */
if (!duty_hw)
return -EINVAL;
mutex_lock(&leds->lock);
/*
* Set max_brightness as the software blink behavior
* when no blink brightness.
*/
if (!led->current_brightness) {
ret = mt6323_led_hw_on(cdev, cdev->max_brightness);
if (ret < 0)
goto out;
led->current_brightness = cdev->max_brightness;
}
ret = regmap_update_bits(regmap, ISINK_CON(regs->isink_con[0], led->id),
ISINK_DIM_DUTY_MASK,
ISINK_DIM_DUTY(duty_hw - 1));
if (ret < 0)
goto out;
ret = regmap_update_bits(regmap, ISINK_CON(regs->isink_con[1], led->id),
ISINK_DIM_FSEL_MASK,
ISINK_DIM_FSEL(period - 1));
out:
mutex_unlock(&leds->lock);
return ret;
}
static int mt6323_led_set_brightness(struct led_classdev *cdev,
enum led_brightness brightness)
{
struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev);
struct mt6323_leds *leds = led->parent;
int ret;
mutex_lock(&leds->lock);
if (!led->current_brightness && brightness) {
ret = mt6323_led_hw_on(cdev, brightness);
if (ret < 0)
goto out;
} else if (brightness) {
ret = mt6323_led_hw_brightness(cdev, brightness);
if (ret < 0)
goto out;
} else {
ret = mt6323_led_hw_off(cdev);
if (ret < 0)
goto out;
}
led->current_brightness = brightness;
out:
mutex_unlock(&leds->lock);
return ret;
}
static int mtk_wled_hw_on(struct led_classdev *cdev)
{
struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev);
struct mt6323_leds *leds = led->parent;
const struct mt6323_regs *regs = leds->pdata->regs;
struct regmap *regmap = leds->hw->regmap;
int ret;
ret = regmap_clear_bits(regmap, regs->top_ckpdn[0], RG_VWLED_32K_CK_PDN);
if (ret)
return ret;
ret = regmap_clear_bits(regmap, regs->top_ckpdn[0], RG_VWLED_6M_CK_PDN);
if (ret)
return ret;
ret = regmap_clear_bits(regmap, regs->top_ckpdn[0], RG_VWLED_1M_CK_PDN);
if (ret)
return ret;
usleep_range(5000, 6000);
/* Enable WLED channel pair */
ret = regmap_set_bits(regmap, regs->iwled_en_ctrl, BIT(led->id));
if (ret)
return ret;
ret = regmap_set_bits(regmap, regs->iwled_en_ctrl, BIT(led->id + 1));
if (ret)
return ret;
return 0;
}
static int mtk_wled_hw_off(struct led_classdev *cdev)
{
struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev);
struct mt6323_leds *leds = led->parent;
const struct mt6323_regs *regs = leds->pdata->regs;
struct regmap *regmap = leds->hw->regmap;
int ret;
ret = regmap_clear_bits(regmap, regs->iwled_en_ctrl, BIT(led->id + 1));
if (ret)
return ret;
ret = regmap_clear_bits(regmap, regs->iwled_en_ctrl, BIT(led->id));
if (ret)
return ret;
ret = regmap_set_bits(regmap, regs->top_ckpdn[0], RG_VWLED_32K_CK_PDN);
if (ret)
return ret;
ret = regmap_set_bits(regmap, regs->top_ckpdn[0], RG_VWLED_6M_CK_PDN);
if (ret)
return ret;
ret = regmap_set_bits(regmap, regs->top_ckpdn[0], RG_VWLED_1M_CK_PDN);
if (ret)
return ret;
return 0;
}
static enum led_brightness mt6323_get_wled_brightness(struct led_classdev *cdev)
{
struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev);
struct mt6323_leds *leds = led->parent;
const struct mt6323_regs *regs = leds->pdata->regs;
struct regmap *regmap = leds->hw->regmap;
unsigned int status;
int ret;
ret = regmap_read(regmap, regs->iwled_en_ctrl, &status);
if (ret)
return 0;
/* Always two channels per WLED */
status &= BIT(led->id) | BIT(led->id + 1);
return status ? led->current_brightness : 0;
}
static int mt6323_wled_set_brightness(struct led_classdev *cdev,
enum led_brightness brightness)
{
struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev);
struct mt6323_leds *leds = led->parent;
int ret = 0;
mutex_lock(&leds->lock);
if (brightness) {
if (!led->current_brightness)
ret = mtk_wled_hw_on(cdev);
if (ret)
goto out;
} else {
ret = mtk_wled_hw_off(cdev);
if (ret)
goto out;
}
led->current_brightness = brightness;
out:
mutex_unlock(&leds->lock);
return ret;
}
static int mt6323_led_set_dt_default(struct led_classdev *cdev,
struct device_node *np)
{
struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev);
enum led_default_state state;
int ret = 0;
state = led_init_default_state_get(of_fwnode_handle(np));
switch (state) {
case LEDS_DEFSTATE_ON:
ret = mt6323_led_set_brightness(cdev, cdev->max_brightness);
break;
case LEDS_DEFSTATE_KEEP:
ret = mt6323_get_led_hw_brightness(cdev);
if (ret < 0)
return ret;
led->current_brightness = ret;
ret = 0;
break;
default:
ret = mt6323_led_set_brightness(cdev, LED_OFF);
}
return ret;
}
static int mt6323_led_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev_of_node(dev);
struct device_node *child;
struct mt6397_chip *hw = dev_get_drvdata(dev->parent);
struct mt6323_leds *leds;
struct mt6323_led *led;
const struct mt6323_regs *regs;
const struct mt6323_hwspec *spec;
int ret;
unsigned int status;
u32 reg;
u8 max_leds;
leds = devm_kzalloc(dev, sizeof(*leds), GFP_KERNEL);
if (!leds)
return -ENOMEM;
platform_set_drvdata(pdev, leds);
leds->dev = dev;
leds->pdata = device_get_match_data(dev);
regs = leds->pdata->regs;
spec = leds->pdata->spec;
max_leds = spec->max_leds + spec->max_wleds;
/*
* leds->hw points to the underlying bus for the register
* controlled.
*/
leds->hw = hw;
mutex_init(&leds->lock);
status = RG_DRV_32K_CK_PDN;
ret = regmap_update_bits(leds->hw->regmap, regs->top_ckpdn[0],
RG_DRV_32K_CK_PDN_MASK, ~status);
if (ret < 0) {
dev_err(leds->dev,
"Failed to update TOP_CKPDN0 Register\n");
return ret;
}
for_each_available_child_of_node(np, child) {
struct led_init_data init_data = {};
bool is_wled;
ret = of_property_read_u32(child, "reg", ®);
if (ret) {
dev_err(dev, "Failed to read led 'reg' property\n");
goto put_child_node;
}
if (reg >= max_leds || reg >= MAX_SUPPORTED_LEDS ||
leds->led[reg]) {
dev_err(dev, "Invalid led reg %u\n", reg);
ret = -EINVAL;
goto put_child_node;
}
led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL);
if (!led) {
ret = -ENOMEM;
goto put_child_node;
}
is_wled = of_property_read_bool(child, "mediatek,is-wled");
leds->led[reg] = led;
leds->led[reg]->id = reg;
leds->led[reg]->cdev.max_brightness = spec->max_brightness;
if (is_wled) {
leds->led[reg]->cdev.brightness_set_blocking =
mt6323_wled_set_brightness;
leds->led[reg]->cdev.brightness_get =
mt6323_get_wled_brightness;
} else {
leds->led[reg]->cdev.brightness_set_blocking =
mt6323_led_set_brightness;
leds->led[reg]->cdev.blink_set = mt6323_led_set_blink;
leds->led[reg]->cdev.brightness_get =
mt6323_get_led_hw_brightness;
}
leds->led[reg]->parent = leds;
ret = mt6323_led_set_dt_default(&leds->led[reg]->cdev, child);
if (ret < 0) {
dev_err(leds->dev,
"Failed to LED set default from devicetree\n");
goto put_child_node;
}
init_data.fwnode = of_fwnode_handle(child);
ret = devm_led_classdev_register_ext(dev, &leds->led[reg]->cdev,
&init_data);
if (ret) {
dev_err(dev, "Failed to register LED: %d\n", ret);
goto put_child_node;
}
}
return 0;
put_child_node:
of_node_put(child);
return ret;
}
static int mt6323_led_remove(struct platform_device *pdev)
{
struct mt6323_leds *leds = platform_get_drvdata(pdev);
const struct mt6323_regs *regs = leds->pdata->regs;
int i;
/* Turn the LEDs off on driver removal. */
for (i = 0 ; leds->led[i] ; i++)
mt6323_led_hw_off(&leds->led[i]->cdev);
regmap_update_bits(leds->hw->regmap, regs->top_ckpdn[0],
RG_DRV_32K_CK_PDN_MASK,
RG_DRV_32K_CK_PDN);
mutex_destroy(&leds->lock);
return 0;
}
static const struct mt6323_regs mt6323_registers = {
.top_ckpdn = (const u16[]){ 0x102, 0x106, 0x10e },
.num_top_ckpdn = 3,
.top_ckcon = (const u16[]){ 0x120, 0x126 },
.num_top_ckcon = 2,
.isink_con = (const u16[]){ 0x330, 0x332, 0x334 },
.num_isink_con = 3,
.isink_max_regs = 4, /* ISINK[0..3] */
.isink_en_ctrl = 0x356,
};
static const struct mt6323_regs mt6331_registers = {
.top_ckpdn = (const u16[]){ 0x138, 0x13e, 0x144 },
.num_top_ckpdn = 3,
.top_ckcon = (const u16[]){ 0x14c, 0x14a },
.num_top_ckcon = 2,
.isink_con = (const u16[]){ 0x40c, 0x40e, 0x410, 0x412, 0x414 },
.num_isink_con = 5,
.isink_max_regs = 4, /* ISINK[0..3] */
.isink_en_ctrl = 0x43a,
};
static const struct mt6323_regs mt6332_registers = {
.top_ckpdn = (const u16[]){ 0x8094, 0x809a, 0x80a0 },
.num_top_ckpdn = 3,
.top_ckcon = (const u16[]){ 0x80a6, 0x80ac },
.num_top_ckcon = 2,
.isink_con = (const u16[]){ 0x8cd4 },
.num_isink_con = 1,
.isink_max_regs = 12, /* IWLED[0..2, 3..9] */
.iwled_en_ctrl = 0x8cda,
};
static const struct mt6323_hwspec mt6323_spec = {
.max_period = 10000,
.max_leds = 4,
.max_brightness = 6,
.unit_duty = 3125,
};
static const struct mt6323_hwspec mt6332_spec = {
/* There are no LEDs in MT6332. Only WLEDs are present. */
.max_leds = 0,
.max_wleds = 1,
.max_brightness = 1024,
};
static const struct mt6323_data mt6323_pdata = {
.regs = &mt6323_registers,
.spec = &mt6323_spec,
};
static const struct mt6323_data mt6331_pdata = {
.regs = &mt6331_registers,
.spec = &mt6323_spec,
};
static const struct mt6323_data mt6332_pdata = {
.regs = &mt6332_registers,
.spec = &mt6332_spec,
};
static const struct of_device_id mt6323_led_dt_match[] = {
{ .compatible = "mediatek,mt6323-led", .data = &mt6323_pdata},
{ .compatible = "mediatek,mt6331-led", .data = &mt6331_pdata },
{ .compatible = "mediatek,mt6332-led", .data = &mt6332_pdata },
{},
};
MODULE_DEVICE_TABLE(of, mt6323_led_dt_match);
static struct platform_driver mt6323_led_driver = {
.probe = mt6323_led_probe,
.remove = mt6323_led_remove,
.driver = {
.name = "mt6323-led",
.of_match_table = mt6323_led_dt_match,
},
};
module_platform_driver(mt6323_led_driver);
MODULE_DESCRIPTION("LED driver for Mediatek MT6323 PMIC");
MODULE_AUTHOR("Sean Wang <[email protected]>");
MODULE_LICENSE("GPL");
| linux-master | drivers/leds/leds-mt6323.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* TI LP8501 9 channel LED Driver
*
* Copyright (C) 2013 Texas Instruments
*
* Author: Milo(Woogyom) Kim <[email protected]>
*/
#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/platform_data/leds-lp55xx.h>
#include <linux/slab.h>
#include "leds-lp55xx-common.h"
#define LP8501_PROGRAM_LENGTH 32
#define LP8501_MAX_LEDS 9
/* Registers */
#define LP8501_REG_ENABLE 0x00
#define LP8501_ENABLE BIT(6)
#define LP8501_EXEC_M 0x3F
#define LP8501_EXEC_ENG1_M 0x30
#define LP8501_EXEC_ENG2_M 0x0C
#define LP8501_EXEC_ENG3_M 0x03
#define LP8501_RUN_ENG1 0x20
#define LP8501_RUN_ENG2 0x08
#define LP8501_RUN_ENG3 0x02
#define LP8501_REG_OP_MODE 0x01
#define LP8501_MODE_ENG1_M 0x30
#define LP8501_MODE_ENG2_M 0x0C
#define LP8501_MODE_ENG3_M 0x03
#define LP8501_LOAD_ENG1 0x10
#define LP8501_LOAD_ENG2 0x04
#define LP8501_LOAD_ENG3 0x01
#define LP8501_REG_PWR_CONFIG 0x05
#define LP8501_PWR_CONFIG_M 0x03
#define LP8501_REG_LED_PWM_BASE 0x16
#define LP8501_REG_LED_CURRENT_BASE 0x26
#define LP8501_REG_CONFIG 0x36
#define LP8501_PWM_PSAVE BIT(7)
#define LP8501_AUTO_INC BIT(6)
#define LP8501_PWR_SAVE BIT(5)
#define LP8501_CP_MODE_MASK 0x18
#define LP8501_CP_MODE_SHIFT 3
#define LP8501_INT_CLK BIT(0)
#define LP8501_DEFAULT_CFG (LP8501_PWM_PSAVE | LP8501_AUTO_INC | LP8501_PWR_SAVE)
#define LP8501_REG_RESET 0x3D
#define LP8501_RESET 0xFF
#define LP8501_REG_PROG_PAGE_SEL 0x4F
#define LP8501_PAGE_ENG1 0
#define LP8501_PAGE_ENG2 1
#define LP8501_PAGE_ENG3 2
#define LP8501_REG_PROG_MEM 0x50
#define LP8501_ENG1_IS_LOADING(mode) \
((mode & LP8501_MODE_ENG1_M) == LP8501_LOAD_ENG1)
#define LP8501_ENG2_IS_LOADING(mode) \
((mode & LP8501_MODE_ENG2_M) == LP8501_LOAD_ENG2)
#define LP8501_ENG3_IS_LOADING(mode) \
((mode & LP8501_MODE_ENG3_M) == LP8501_LOAD_ENG3)
static inline void lp8501_wait_opmode_done(void)
{
usleep_range(1000, 2000);
}
static void lp8501_set_led_current(struct lp55xx_led *led, u8 led_current)
{
led->led_current = led_current;
lp55xx_write(led->chip, LP8501_REG_LED_CURRENT_BASE + led->chan_nr,
led_current);
}
static int lp8501_post_init_device(struct lp55xx_chip *chip)
{
int ret;
u8 val = LP8501_DEFAULT_CFG;
ret = lp55xx_write(chip, LP8501_REG_ENABLE, LP8501_ENABLE);
if (ret)
return ret;
/* Chip startup time is 500 us, 1 - 2 ms gives some margin */
usleep_range(1000, 2000);
if (chip->pdata->clock_mode != LP55XX_CLOCK_EXT)
val |= LP8501_INT_CLK;
val |= (chip->pdata->charge_pump_mode << LP8501_CP_MODE_SHIFT) & LP8501_CP_MODE_MASK;
ret = lp55xx_write(chip, LP8501_REG_CONFIG, val);
if (ret)
return ret;
/* Power selection for each output */
return lp55xx_update_bits(chip, LP8501_REG_PWR_CONFIG,
LP8501_PWR_CONFIG_M, chip->pdata->pwr_sel);
}
static void lp8501_load_engine(struct lp55xx_chip *chip)
{
enum lp55xx_engine_index idx = chip->engine_idx;
static const u8 mask[] = {
[LP55XX_ENGINE_1] = LP8501_MODE_ENG1_M,
[LP55XX_ENGINE_2] = LP8501_MODE_ENG2_M,
[LP55XX_ENGINE_3] = LP8501_MODE_ENG3_M,
};
static const u8 val[] = {
[LP55XX_ENGINE_1] = LP8501_LOAD_ENG1,
[LP55XX_ENGINE_2] = LP8501_LOAD_ENG2,
[LP55XX_ENGINE_3] = LP8501_LOAD_ENG3,
};
static const u8 page_sel[] = {
[LP55XX_ENGINE_1] = LP8501_PAGE_ENG1,
[LP55XX_ENGINE_2] = LP8501_PAGE_ENG2,
[LP55XX_ENGINE_3] = LP8501_PAGE_ENG3,
};
lp55xx_update_bits(chip, LP8501_REG_OP_MODE, mask[idx], val[idx]);
lp8501_wait_opmode_done();
lp55xx_write(chip, LP8501_REG_PROG_PAGE_SEL, page_sel[idx]);
}
static void lp8501_stop_engine(struct lp55xx_chip *chip)
{
lp55xx_write(chip, LP8501_REG_OP_MODE, 0);
lp8501_wait_opmode_done();
}
static void lp8501_turn_off_channels(struct lp55xx_chip *chip)
{
int i;
for (i = 0; i < LP8501_MAX_LEDS; i++)
lp55xx_write(chip, LP8501_REG_LED_PWM_BASE + i, 0);
}
static void lp8501_run_engine(struct lp55xx_chip *chip, bool start)
{
int ret;
u8 mode;
u8 exec;
/* stop engine */
if (!start) {
lp8501_stop_engine(chip);
lp8501_turn_off_channels(chip);
return;
}
/*
* To run the engine,
* operation mode and enable register should updated at the same time
*/
ret = lp55xx_read(chip, LP8501_REG_OP_MODE, &mode);
if (ret)
return;
ret = lp55xx_read(chip, LP8501_REG_ENABLE, &exec);
if (ret)
return;
/* change operation mode to RUN only when each engine is loading */
if (LP8501_ENG1_IS_LOADING(mode)) {
mode = (mode & ~LP8501_MODE_ENG1_M) | LP8501_RUN_ENG1;
exec = (exec & ~LP8501_EXEC_ENG1_M) | LP8501_RUN_ENG1;
}
if (LP8501_ENG2_IS_LOADING(mode)) {
mode = (mode & ~LP8501_MODE_ENG2_M) | LP8501_RUN_ENG2;
exec = (exec & ~LP8501_EXEC_ENG2_M) | LP8501_RUN_ENG2;
}
if (LP8501_ENG3_IS_LOADING(mode)) {
mode = (mode & ~LP8501_MODE_ENG3_M) | LP8501_RUN_ENG3;
exec = (exec & ~LP8501_EXEC_ENG3_M) | LP8501_RUN_ENG3;
}
lp55xx_write(chip, LP8501_REG_OP_MODE, mode);
lp8501_wait_opmode_done();
lp55xx_update_bits(chip, LP8501_REG_ENABLE, LP8501_EXEC_M, exec);
}
static int lp8501_update_program_memory(struct lp55xx_chip *chip,
const u8 *data, size_t size)
{
u8 pattern[LP8501_PROGRAM_LENGTH] = {0};
unsigned cmd;
char c[3];
int update_size;
int nrchars;
int offset = 0;
int ret;
int i;
/* clear program memory before updating */
for (i = 0; i < LP8501_PROGRAM_LENGTH; i++)
lp55xx_write(chip, LP8501_REG_PROG_MEM + i, 0);
i = 0;
while ((offset < size - 1) && (i < LP8501_PROGRAM_LENGTH)) {
/* separate sscanfs because length is working only for %s */
ret = sscanf(data + offset, "%2s%n ", c, &nrchars);
if (ret != 1)
goto err;
ret = sscanf(c, "%2x", &cmd);
if (ret != 1)
goto err;
pattern[i] = (u8)cmd;
offset += nrchars;
i++;
}
/* Each instruction is 16bit long. Check that length is even */
if (i % 2)
goto err;
update_size = i;
for (i = 0; i < update_size; i++)
lp55xx_write(chip, LP8501_REG_PROG_MEM + i, pattern[i]);
return 0;
err:
dev_err(&chip->cl->dev, "wrong pattern format\n");
return -EINVAL;
}
static void lp8501_firmware_loaded(struct lp55xx_chip *chip)
{
const struct firmware *fw = chip->fw;
if (fw->size > LP8501_PROGRAM_LENGTH) {
dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n",
fw->size);
return;
}
/*
* Program memory sequence
* 1) set engine mode to "LOAD"
* 2) write firmware data into program memory
*/
lp8501_load_engine(chip);
lp8501_update_program_memory(chip, fw->data, fw->size);
}
static int lp8501_led_brightness(struct lp55xx_led *led)
{
struct lp55xx_chip *chip = led->chip;
int ret;
mutex_lock(&chip->lock);
ret = lp55xx_write(chip, LP8501_REG_LED_PWM_BASE + led->chan_nr,
led->brightness);
mutex_unlock(&chip->lock);
return ret;
}
/* Chip specific configurations */
static struct lp55xx_device_config lp8501_cfg = {
.reset = {
.addr = LP8501_REG_RESET,
.val = LP8501_RESET,
},
.enable = {
.addr = LP8501_REG_ENABLE,
.val = LP8501_ENABLE,
},
.max_channel = LP8501_MAX_LEDS,
.post_init_device = lp8501_post_init_device,
.brightness_fn = lp8501_led_brightness,
.set_led_current = lp8501_set_led_current,
.firmware_cb = lp8501_firmware_loaded,
.run_engine = lp8501_run_engine,
};
static int lp8501_probe(struct i2c_client *client)
{
const struct i2c_device_id *id = i2c_client_get_device_id(client);
int ret;
struct lp55xx_chip *chip;
struct lp55xx_led *led;
struct lp55xx_platform_data *pdata = dev_get_platdata(&client->dev);
struct device_node *np = dev_of_node(&client->dev);
chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
if (!chip)
return -ENOMEM;
chip->cfg = &lp8501_cfg;
if (!pdata) {
if (np) {
pdata = lp55xx_of_populate_pdata(&client->dev, np,
chip);
if (IS_ERR(pdata))
return PTR_ERR(pdata);
} else {
dev_err(&client->dev, "no platform data\n");
return -EINVAL;
}
}
led = devm_kcalloc(&client->dev,
pdata->num_channels, sizeof(*led), GFP_KERNEL);
if (!led)
return -ENOMEM;
chip->cl = client;
chip->pdata = pdata;
mutex_init(&chip->lock);
i2c_set_clientdata(client, led);
ret = lp55xx_init_device(chip);
if (ret)
goto err_init;
dev_info(&client->dev, "%s Programmable led chip found\n", id->name);
ret = lp55xx_register_leds(led, chip);
if (ret)
goto err_out;
ret = lp55xx_register_sysfs(chip);
if (ret) {
dev_err(&client->dev, "registering sysfs failed\n");
goto err_out;
}
return 0;
err_out:
lp55xx_deinit_device(chip);
err_init:
return ret;
}
static void lp8501_remove(struct i2c_client *client)
{
struct lp55xx_led *led = i2c_get_clientdata(client);
struct lp55xx_chip *chip = led->chip;
lp8501_stop_engine(chip);
lp55xx_unregister_sysfs(chip);
lp55xx_deinit_device(chip);
}
static const struct i2c_device_id lp8501_id[] = {
{ "lp8501", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, lp8501_id);
static const struct of_device_id of_lp8501_leds_match[] = {
{ .compatible = "ti,lp8501", },
{},
};
MODULE_DEVICE_TABLE(of, of_lp8501_leds_match);
static struct i2c_driver lp8501_driver = {
.driver = {
.name = "lp8501",
.of_match_table = of_lp8501_leds_match,
},
.probe = lp8501_probe,
.remove = lp8501_remove,
.id_table = lp8501_id,
};
module_i2c_driver(lp8501_driver);
MODULE_DESCRIPTION("Texas Instruments LP8501 LED driver");
MODULE_AUTHOR("Milo Kim");
MODULE_LICENSE("GPL");
| linux-master | drivers/leds/leds-lp8501.c |
/*
* drivers/leds/leds-apu.c
* Copyright (C) 2017 Alan Mizrahi, alan at mizrahi dot com dot ve
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the names of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/dmi.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#define APU1_FCH_ACPI_MMIO_BASE 0xFED80000
#define APU1_FCH_GPIO_BASE (APU1_FCH_ACPI_MMIO_BASE + 0x01BD)
#define APU1_LEDON 0x08
#define APU1_LEDOFF 0xC8
#define APU1_NUM_GPIO 3
#define APU1_IOSIZE sizeof(u8)
/* LED access parameters */
struct apu_param {
void __iomem *addr; /* for ioread/iowrite */
};
/* LED private data */
struct apu_led_priv {
struct led_classdev cdev;
struct apu_param param;
};
#define cdev_to_priv(c) container_of(c, struct apu_led_priv, cdev)
/* LED profile */
struct apu_led_profile {
const char *name;
enum led_brightness brightness;
unsigned long offset; /* for devm_ioremap */
};
struct apu_led_pdata {
struct platform_device *pdev;
struct apu_led_priv *pled;
spinlock_t lock;
};
static struct apu_led_pdata *apu_led;
static const struct apu_led_profile apu1_led_profile[] = {
{ "apu:green:1", LED_ON, APU1_FCH_GPIO_BASE + 0 * APU1_IOSIZE },
{ "apu:green:2", LED_OFF, APU1_FCH_GPIO_BASE + 1 * APU1_IOSIZE },
{ "apu:green:3", LED_OFF, APU1_FCH_GPIO_BASE + 2 * APU1_IOSIZE },
};
static const struct dmi_system_id apu_led_dmi_table[] __initconst = {
/* PC Engines APU with factory bios "SageBios_PCEngines_APU-45" */
{
.ident = "apu",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "PC Engines"),
DMI_MATCH(DMI_PRODUCT_NAME, "APU")
}
},
/* PC Engines APU with "Mainline" bios >= 4.6.8 */
{
.ident = "apu",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "PC Engines"),
DMI_MATCH(DMI_PRODUCT_NAME, "apu1")
}
},
{}
};
MODULE_DEVICE_TABLE(dmi, apu_led_dmi_table);
static void apu1_led_brightness_set(struct led_classdev *led, enum led_brightness value)
{
struct apu_led_priv *pled = cdev_to_priv(led);
spin_lock(&apu_led->lock);
iowrite8(value ? APU1_LEDON : APU1_LEDOFF, pled->param.addr);
spin_unlock(&apu_led->lock);
}
static int apu_led_config(struct device *dev, struct apu_led_pdata *apuld)
{
int i;
int err;
apu_led->pled = devm_kcalloc(dev,
ARRAY_SIZE(apu1_led_profile), sizeof(struct apu_led_priv),
GFP_KERNEL);
if (!apu_led->pled)
return -ENOMEM;
for (i = 0; i < ARRAY_SIZE(apu1_led_profile); i++) {
struct apu_led_priv *pled = &apu_led->pled[i];
struct led_classdev *led_cdev = &pled->cdev;
led_cdev->name = apu1_led_profile[i].name;
led_cdev->brightness = apu1_led_profile[i].brightness;
led_cdev->max_brightness = 1;
led_cdev->flags = LED_CORE_SUSPENDRESUME;
led_cdev->brightness_set = apu1_led_brightness_set;
pled->param.addr = devm_ioremap(dev,
apu1_led_profile[i].offset, APU1_IOSIZE);
if (!pled->param.addr) {
err = -ENOMEM;
goto error;
}
err = led_classdev_register(dev, led_cdev);
if (err)
goto error;
apu1_led_brightness_set(led_cdev, apu1_led_profile[i].brightness);
}
return 0;
error:
while (i-- > 0)
led_classdev_unregister(&apu_led->pled[i].cdev);
return err;
}
static int __init apu_led_probe(struct platform_device *pdev)
{
apu_led = devm_kzalloc(&pdev->dev, sizeof(*apu_led), GFP_KERNEL);
if (!apu_led)
return -ENOMEM;
apu_led->pdev = pdev;
spin_lock_init(&apu_led->lock);
return apu_led_config(&pdev->dev, apu_led);
}
static struct platform_driver apu_led_driver = {
.driver = {
.name = KBUILD_MODNAME,
},
};
static int __init apu_led_init(void)
{
struct platform_device *pdev;
int err;
if (!(dmi_match(DMI_SYS_VENDOR, "PC Engines") &&
(dmi_match(DMI_PRODUCT_NAME, "APU") || dmi_match(DMI_PRODUCT_NAME, "apu1")))) {
pr_err("No PC Engines APUv1 board detected. For APUv2,3 support, enable CONFIG_PCENGINES_APU2\n");
return -ENODEV;
}
pdev = platform_device_register_simple(KBUILD_MODNAME, -1, NULL, 0);
if (IS_ERR(pdev)) {
pr_err("Device allocation failed\n");
return PTR_ERR(pdev);
}
err = platform_driver_probe(&apu_led_driver, apu_led_probe);
if (err) {
pr_err("Probe platform driver failed\n");
platform_device_unregister(pdev);
}
return err;
}
static void __exit apu_led_exit(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(apu1_led_profile); i++)
led_classdev_unregister(&apu_led->pled[i].cdev);
platform_device_unregister(apu_led->pdev);
platform_driver_unregister(&apu_led_driver);
}
module_init(apu_led_init);
module_exit(apu_led_exit);
MODULE_AUTHOR("Alan Mizrahi");
MODULE_DESCRIPTION("PC Engines APU1 front LED driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:leds_apu");
| linux-master | drivers/leds/leds-apu.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* LEDs driver for Soekris net48xx
*
* Copyright (C) 2006 Chris Boot <[email protected]>
*
* Based on leds-ams-delta.c
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/leds.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/nsc_gpio.h>
#include <linux/scx200_gpio.h>
#include <linux/module.h>
#define DRVNAME "net48xx-led"
#define NET48XX_ERROR_LED_GPIO 20
static struct platform_device *pdev;
static void net48xx_error_led_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
scx200_gpio_ops.gpio_set(NET48XX_ERROR_LED_GPIO, value ? 1 : 0);
}
static struct led_classdev net48xx_error_led = {
.name = "net48xx::error",
.brightness_set = net48xx_error_led_set,
.flags = LED_CORE_SUSPENDRESUME,
};
static int net48xx_led_probe(struct platform_device *pdev)
{
return devm_led_classdev_register(&pdev->dev, &net48xx_error_led);
}
static struct platform_driver net48xx_led_driver = {
.probe = net48xx_led_probe,
.driver = {
.name = DRVNAME,
},
};
static int __init net48xx_led_init(void)
{
int ret;
/* small hack, but scx200_gpio doesn't set .dev if the probe fails */
if (!scx200_gpio_ops.dev) {
ret = -ENODEV;
goto out;
}
ret = platform_driver_register(&net48xx_led_driver);
if (ret < 0)
goto out;
pdev = platform_device_register_simple(DRVNAME, -1, NULL, 0);
if (IS_ERR(pdev)) {
ret = PTR_ERR(pdev);
platform_driver_unregister(&net48xx_led_driver);
goto out;
}
out:
return ret;
}
static void __exit net48xx_led_exit(void)
{
platform_device_unregister(pdev);
platform_driver_unregister(&net48xx_led_driver);
}
module_init(net48xx_led_init);
module_exit(net48xx_led_exit);
MODULE_AUTHOR("Chris Boot <[email protected]>");
MODULE_DESCRIPTION("Soekris net48xx LED driver");
MODULE_LICENSE("GPL");
| linux-master | drivers/leds/leds-net48xx.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Driver for BCM6328 memory-mapped LEDs, based on leds-syscon.c
*
* Copyright 2015 Álvaro Fernández Rojas <[email protected]>
* Copyright 2015 Jonas Gorski <[email protected]>
*/
#include <linux/io.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/spinlock.h>
#define BCM6328_REG_INIT 0x00
#define BCM6328_REG_MODE_HI 0x04
#define BCM6328_REG_MODE_LO 0x08
#define BCM6328_REG_HWDIS 0x0c
#define BCM6328_REG_STROBE 0x10
#define BCM6328_REG_LNKACTSEL_HI 0x14
#define BCM6328_REG_LNKACTSEL_LO 0x18
#define BCM6328_REG_RBACK 0x1c
#define BCM6328_REG_SERMUX 0x20
#define BCM6328_LED_MAX_COUNT 24
#define BCM6328_LED_DEF_DELAY 500
#define BCM6328_LED_BLINK_DELAYS 2
#define BCM6328_LED_BLINK_MS 20
#define BCM6328_LED_BLINK_MASK 0x3f
#define BCM6328_LED_BLINK1_SHIFT 0
#define BCM6328_LED_BLINK1_MASK (BCM6328_LED_BLINK_MASK << \
BCM6328_LED_BLINK1_SHIFT)
#define BCM6328_LED_BLINK2_SHIFT 6
#define BCM6328_LED_BLINK2_MASK (BCM6328_LED_BLINK_MASK << \
BCM6328_LED_BLINK2_SHIFT)
#define BCM6328_SERIAL_LED_EN BIT(12)
#define BCM6328_SERIAL_LED_MUX BIT(13)
#define BCM6328_SERIAL_LED_CLK_NPOL BIT(14)
#define BCM6328_SERIAL_LED_DATA_PPOL BIT(15)
#define BCM6328_SERIAL_LED_SHIFT_DIR BIT(16)
#define BCM6328_LED_SHIFT_TEST BIT(30)
#define BCM6328_LED_TEST BIT(31)
#define BCM6328_INIT_MASK (BCM6328_SERIAL_LED_EN | \
BCM6328_SERIAL_LED_MUX | \
BCM6328_SERIAL_LED_CLK_NPOL | \
BCM6328_SERIAL_LED_DATA_PPOL | \
BCM6328_SERIAL_LED_SHIFT_DIR)
#define BCM6328_LED_MODE_MASK 3
#define BCM6328_LED_MODE_ON 0
#define BCM6328_LED_MODE_BLINK1 1
#define BCM6328_LED_MODE_BLINK2 2
#define BCM6328_LED_MODE_OFF 3
#define BCM6328_LED_SHIFT(X) ((X) << 1)
/**
* struct bcm6328_led - state container for bcm6328 based LEDs
* @cdev: LED class device for this LED
* @mem: memory resource
* @lock: memory lock
* @pin: LED pin number
* @blink_leds: blinking LEDs
* @blink_delay: blinking delay
* @active_low: LED is active low
*/
struct bcm6328_led {
struct led_classdev cdev;
void __iomem *mem;
spinlock_t *lock;
unsigned long pin;
unsigned long *blink_leds;
unsigned long *blink_delay;
bool active_low;
};
static void bcm6328_led_write(void __iomem *reg, unsigned long data)
{
#ifdef CONFIG_CPU_BIG_ENDIAN
iowrite32be(data, reg);
#else
writel(data, reg);
#endif
}
static unsigned long bcm6328_led_read(void __iomem *reg)
{
#ifdef CONFIG_CPU_BIG_ENDIAN
return ioread32be(reg);
#else
return readl(reg);
#endif
}
/*
* LEDMode 64 bits / 24 LEDs
* bits [31:0] -> LEDs 8-23
* bits [47:32] -> LEDs 0-7
* bits [63:48] -> unused
*/
static unsigned long bcm6328_pin2shift(unsigned long pin)
{
if (pin < 8)
return pin + 16; /* LEDs 0-7 (bits 47:32) */
else
return pin - 8; /* LEDs 8-23 (bits 31:0) */
}
static void bcm6328_led_mode(struct bcm6328_led *led, unsigned long value)
{
void __iomem *mode;
unsigned long val, shift;
shift = bcm6328_pin2shift(led->pin);
if (shift / 16)
mode = led->mem + BCM6328_REG_MODE_HI;
else
mode = led->mem + BCM6328_REG_MODE_LO;
val = bcm6328_led_read(mode);
val &= ~(BCM6328_LED_MODE_MASK << BCM6328_LED_SHIFT(shift % 16));
val |= (value << BCM6328_LED_SHIFT(shift % 16));
bcm6328_led_write(mode, val);
}
static void bcm6328_led_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
struct bcm6328_led *led =
container_of(led_cdev, struct bcm6328_led, cdev);
unsigned long flags;
spin_lock_irqsave(led->lock, flags);
/* Remove LED from cached HW blinking intervals */
led->blink_leds[0] &= ~BIT(led->pin);
led->blink_leds[1] &= ~BIT(led->pin);
/* Set LED on/off */
if ((led->active_low && value == LED_OFF) ||
(!led->active_low && value != LED_OFF))
bcm6328_led_mode(led, BCM6328_LED_MODE_ON);
else
bcm6328_led_mode(led, BCM6328_LED_MODE_OFF);
spin_unlock_irqrestore(led->lock, flags);
}
static unsigned long bcm6328_blink_delay(unsigned long delay)
{
unsigned long bcm6328_delay;
bcm6328_delay = delay + BCM6328_LED_BLINK_MS / 2;
bcm6328_delay = bcm6328_delay / BCM6328_LED_BLINK_MS;
if (bcm6328_delay == 0)
bcm6328_delay = 1;
return bcm6328_delay;
}
static int bcm6328_blink_set(struct led_classdev *led_cdev,
unsigned long *delay_on, unsigned long *delay_off)
{
struct bcm6328_led *led =
container_of(led_cdev, struct bcm6328_led, cdev);
unsigned long delay, flags;
int rc;
if (!*delay_on)
*delay_on = BCM6328_LED_DEF_DELAY;
if (!*delay_off)
*delay_off = BCM6328_LED_DEF_DELAY;
delay = bcm6328_blink_delay(*delay_on);
if (delay != bcm6328_blink_delay(*delay_off)) {
dev_dbg(led_cdev->dev,
"fallback to soft blinking (delay_on != delay_off)\n");
return -EINVAL;
}
if (delay > BCM6328_LED_BLINK_MASK) {
dev_dbg(led_cdev->dev,
"fallback to soft blinking (delay > %ums)\n",
BCM6328_LED_BLINK_MASK * BCM6328_LED_BLINK_MS);
return -EINVAL;
}
spin_lock_irqsave(led->lock, flags);
/*
* Check if any of the two configurable HW blinking intervals is
* available:
* 1. No LEDs assigned to the HW blinking interval.
* 2. Only this LED is assigned to the HW blinking interval.
* 3. LEDs with the same delay assigned.
*/
if (led->blink_leds[0] == 0 ||
led->blink_leds[0] == BIT(led->pin) ||
led->blink_delay[0] == delay) {
unsigned long val;
/* Add LED to the first HW blinking interval cache */
led->blink_leds[0] |= BIT(led->pin);
/* Remove LED from the second HW blinking interval cache */
led->blink_leds[1] &= ~BIT(led->pin);
/* Cache first HW blinking interval delay */
led->blink_delay[0] = delay;
/* Update the delay for the first HW blinking interval */
val = bcm6328_led_read(led->mem + BCM6328_REG_INIT);
val &= ~BCM6328_LED_BLINK1_MASK;
val |= (delay << BCM6328_LED_BLINK1_SHIFT);
bcm6328_led_write(led->mem + BCM6328_REG_INIT, val);
/* Set the LED to first HW blinking interval */
bcm6328_led_mode(led, BCM6328_LED_MODE_BLINK1);
rc = 0;
} else if (led->blink_leds[1] == 0 ||
led->blink_leds[1] == BIT(led->pin) ||
led->blink_delay[1] == delay) {
unsigned long val;
/* Remove LED from the first HW blinking interval */
led->blink_leds[0] &= ~BIT(led->pin);
/* Add LED to the second HW blinking interval */
led->blink_leds[1] |= BIT(led->pin);
/* Cache second HW blinking interval delay */
led->blink_delay[1] = delay;
/* Update the delay for the second HW blinking interval */
val = bcm6328_led_read(led->mem + BCM6328_REG_INIT);
val &= ~BCM6328_LED_BLINK2_MASK;
val |= (delay << BCM6328_LED_BLINK2_SHIFT);
bcm6328_led_write(led->mem + BCM6328_REG_INIT, val);
/* Set the LED to second HW blinking interval */
bcm6328_led_mode(led, BCM6328_LED_MODE_BLINK2);
rc = 0;
} else {
dev_dbg(led_cdev->dev,
"fallback to soft blinking (delay already set)\n");
rc = -EINVAL;
}
spin_unlock_irqrestore(led->lock, flags);
return rc;
}
static int bcm6328_hwled(struct device *dev, struct device_node *nc, u32 reg,
void __iomem *mem, spinlock_t *lock)
{
int i, cnt;
unsigned long flags, val;
spin_lock_irqsave(lock, flags);
val = bcm6328_led_read(mem + BCM6328_REG_HWDIS);
val &= ~BIT(reg);
bcm6328_led_write(mem + BCM6328_REG_HWDIS, val);
spin_unlock_irqrestore(lock, flags);
/* Only LEDs 0-7 can be activity/link controlled */
if (reg >= 8)
return 0;
cnt = of_property_count_elems_of_size(nc, "brcm,link-signal-sources",
sizeof(u32));
for (i = 0; i < cnt; i++) {
u32 sel;
void __iomem *addr;
if (reg < 4)
addr = mem + BCM6328_REG_LNKACTSEL_LO;
else
addr = mem + BCM6328_REG_LNKACTSEL_HI;
of_property_read_u32_index(nc, "brcm,link-signal-sources", i,
&sel);
if (reg / 4 != sel / 4) {
dev_warn(dev, "invalid link signal source\n");
continue;
}
spin_lock_irqsave(lock, flags);
val = bcm6328_led_read(addr);
val |= (BIT(reg % 4) << (((sel % 4) * 4) + 16));
bcm6328_led_write(addr, val);
spin_unlock_irqrestore(lock, flags);
}
cnt = of_property_count_elems_of_size(nc,
"brcm,activity-signal-sources",
sizeof(u32));
for (i = 0; i < cnt; i++) {
u32 sel;
void __iomem *addr;
if (reg < 4)
addr = mem + BCM6328_REG_LNKACTSEL_LO;
else
addr = mem + BCM6328_REG_LNKACTSEL_HI;
of_property_read_u32_index(nc, "brcm,activity-signal-sources",
i, &sel);
if (reg / 4 != sel / 4) {
dev_warn(dev, "invalid activity signal source\n");
continue;
}
spin_lock_irqsave(lock, flags);
val = bcm6328_led_read(addr);
val |= (BIT(reg % 4) << ((sel % 4) * 4));
bcm6328_led_write(addr, val);
spin_unlock_irqrestore(lock, flags);
}
return 0;
}
static int bcm6328_led(struct device *dev, struct device_node *nc, u32 reg,
void __iomem *mem, spinlock_t *lock,
unsigned long *blink_leds, unsigned long *blink_delay)
{
struct led_init_data init_data = {};
struct bcm6328_led *led;
enum led_default_state state;
unsigned long val, shift;
void __iomem *mode;
int rc;
led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL);
if (!led)
return -ENOMEM;
led->pin = reg;
led->mem = mem;
led->lock = lock;
led->blink_leds = blink_leds;
led->blink_delay = blink_delay;
if (of_property_read_bool(nc, "active-low"))
led->active_low = true;
init_data.fwnode = of_fwnode_handle(nc);
state = led_init_default_state_get(init_data.fwnode);
switch (state) {
case LEDS_DEFSTATE_ON:
led->cdev.brightness = LED_FULL;
break;
case LEDS_DEFSTATE_KEEP:
shift = bcm6328_pin2shift(led->pin);
if (shift / 16)
mode = mem + BCM6328_REG_MODE_HI;
else
mode = mem + BCM6328_REG_MODE_LO;
val = bcm6328_led_read(mode) >> BCM6328_LED_SHIFT(shift % 16);
val &= BCM6328_LED_MODE_MASK;
if ((led->active_low && val == BCM6328_LED_MODE_OFF) ||
(!led->active_low && val == BCM6328_LED_MODE_ON))
led->cdev.brightness = LED_FULL;
else
led->cdev.brightness = LED_OFF;
break;
default:
led->cdev.brightness = LED_OFF;
}
bcm6328_led_set(&led->cdev, led->cdev.brightness);
led->cdev.brightness_set = bcm6328_led_set;
led->cdev.blink_set = bcm6328_blink_set;
rc = devm_led_classdev_register_ext(dev, &led->cdev, &init_data);
if (rc < 0)
return rc;
dev_dbg(dev, "registered LED %s\n", led->cdev.name);
return 0;
}
static int bcm6328_leds_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev_of_node(&pdev->dev);
struct device_node *child;
void __iomem *mem;
spinlock_t *lock; /* memory lock */
unsigned long val, *blink_leds, *blink_delay;
mem = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(mem))
return PTR_ERR(mem);
lock = devm_kzalloc(dev, sizeof(*lock), GFP_KERNEL);
if (!lock)
return -ENOMEM;
blink_leds = devm_kcalloc(dev, BCM6328_LED_BLINK_DELAYS,
sizeof(*blink_leds), GFP_KERNEL);
if (!blink_leds)
return -ENOMEM;
blink_delay = devm_kcalloc(dev, BCM6328_LED_BLINK_DELAYS,
sizeof(*blink_delay), GFP_KERNEL);
if (!blink_delay)
return -ENOMEM;
spin_lock_init(lock);
bcm6328_led_write(mem + BCM6328_REG_HWDIS, ~0);
bcm6328_led_write(mem + BCM6328_REG_LNKACTSEL_HI, 0);
bcm6328_led_write(mem + BCM6328_REG_LNKACTSEL_LO, 0);
val = bcm6328_led_read(mem + BCM6328_REG_INIT);
val &= ~(BCM6328_INIT_MASK);
if (of_property_read_bool(np, "brcm,serial-leds"))
val |= BCM6328_SERIAL_LED_EN;
if (of_property_read_bool(np, "brcm,serial-mux"))
val |= BCM6328_SERIAL_LED_MUX;
if (of_property_read_bool(np, "brcm,serial-clk-low"))
val |= BCM6328_SERIAL_LED_CLK_NPOL;
if (!of_property_read_bool(np, "brcm,serial-dat-low"))
val |= BCM6328_SERIAL_LED_DATA_PPOL;
if (!of_property_read_bool(np, "brcm,serial-shift-inv"))
val |= BCM6328_SERIAL_LED_SHIFT_DIR;
bcm6328_led_write(mem + BCM6328_REG_INIT, val);
for_each_available_child_of_node(np, child) {
int rc;
u32 reg;
if (of_property_read_u32(child, "reg", ®))
continue;
if (reg >= BCM6328_LED_MAX_COUNT) {
dev_err(dev, "invalid LED (%u >= %d)\n", reg,
BCM6328_LED_MAX_COUNT);
continue;
}
if (of_property_read_bool(child, "brcm,hardware-controlled"))
rc = bcm6328_hwled(dev, child, reg, mem, lock);
else
rc = bcm6328_led(dev, child, reg, mem, lock,
blink_leds, blink_delay);
if (rc < 0) {
of_node_put(child);
return rc;
}
}
return 0;
}
static const struct of_device_id bcm6328_leds_of_match[] = {
{ .compatible = "brcm,bcm6328-leds", },
{ },
};
MODULE_DEVICE_TABLE(of, bcm6328_leds_of_match);
static struct platform_driver bcm6328_leds_driver = {
.probe = bcm6328_leds_probe,
.driver = {
.name = "leds-bcm6328",
.of_match_table = bcm6328_leds_of_match,
},
};
module_platform_driver(bcm6328_leds_driver);
MODULE_AUTHOR("Álvaro Fernández Rojas <[email protected]>");
MODULE_AUTHOR("Jonas Gorski <[email protected]>");
MODULE_DESCRIPTION("LED driver for BCM6328 controllers");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:leds-bcm6328");
| linux-master | drivers/leds/leds-bcm6328.c |
// SPDX-License-Identifier: GPL-2.0-only
/* leds-sunfire.c: SUNW,Ultra-Enterprise LED driver.
*
* Copyright (C) 2008 David S. Miller <[email protected]>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/leds.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <asm/fhc.h>
#include <asm/upa.h>
MODULE_AUTHOR("David S. Miller ([email protected])");
MODULE_DESCRIPTION("Sun Fire LED driver");
MODULE_LICENSE("GPL");
struct sunfire_led {
struct led_classdev led_cdev;
void __iomem *reg;
};
#define to_sunfire_led(d) container_of(d, struct sunfire_led, led_cdev)
static void __clockboard_set(struct led_classdev *led_cdev,
enum led_brightness led_val, u8 bit)
{
struct sunfire_led *p = to_sunfire_led(led_cdev);
u8 reg = upa_readb(p->reg);
switch (bit) {
case CLOCK_CTRL_LLED:
if (led_val)
reg &= ~bit;
else
reg |= bit;
break;
default:
if (led_val)
reg |= bit;
else
reg &= ~bit;
break;
}
upa_writeb(reg, p->reg);
}
static void clockboard_left_set(struct led_classdev *led_cdev,
enum led_brightness led_val)
{
__clockboard_set(led_cdev, led_val, CLOCK_CTRL_LLED);
}
static void clockboard_middle_set(struct led_classdev *led_cdev,
enum led_brightness led_val)
{
__clockboard_set(led_cdev, led_val, CLOCK_CTRL_MLED);
}
static void clockboard_right_set(struct led_classdev *led_cdev,
enum led_brightness led_val)
{
__clockboard_set(led_cdev, led_val, CLOCK_CTRL_RLED);
}
static void __fhc_set(struct led_classdev *led_cdev,
enum led_brightness led_val, u32 bit)
{
struct sunfire_led *p = to_sunfire_led(led_cdev);
u32 reg = upa_readl(p->reg);
switch (bit) {
case FHC_CONTROL_LLED:
if (led_val)
reg &= ~bit;
else
reg |= bit;
break;
default:
if (led_val)
reg |= bit;
else
reg &= ~bit;
break;
}
upa_writel(reg, p->reg);
}
static void fhc_left_set(struct led_classdev *led_cdev,
enum led_brightness led_val)
{
__fhc_set(led_cdev, led_val, FHC_CONTROL_LLED);
}
static void fhc_middle_set(struct led_classdev *led_cdev,
enum led_brightness led_val)
{
__fhc_set(led_cdev, led_val, FHC_CONTROL_MLED);
}
static void fhc_right_set(struct led_classdev *led_cdev,
enum led_brightness led_val)
{
__fhc_set(led_cdev, led_val, FHC_CONTROL_RLED);
}
typedef void (*set_handler)(struct led_classdev *, enum led_brightness);
struct led_type {
const char *name;
set_handler handler;
const char *default_trigger;
};
#define NUM_LEDS_PER_BOARD 3
struct sunfire_drvdata {
struct sunfire_led leds[NUM_LEDS_PER_BOARD];
};
static int sunfire_led_generic_probe(struct platform_device *pdev,
struct led_type *types)
{
struct sunfire_drvdata *p;
int i, err;
if (pdev->num_resources != 1) {
dev_err(&pdev->dev, "Wrong number of resources %d, should be 1\n",
pdev->num_resources);
return -EINVAL;
}
p = devm_kzalloc(&pdev->dev, sizeof(*p), GFP_KERNEL);
if (!p)
return -ENOMEM;
for (i = 0; i < NUM_LEDS_PER_BOARD; i++) {
struct led_classdev *lp = &p->leds[i].led_cdev;
p->leds[i].reg = (void __iomem *) pdev->resource[0].start;
lp->name = types[i].name;
lp->brightness = LED_FULL;
lp->brightness_set = types[i].handler;
lp->default_trigger = types[i].default_trigger;
err = led_classdev_register(&pdev->dev, lp);
if (err) {
dev_err(&pdev->dev, "Could not register %s LED\n",
lp->name);
for (i--; i >= 0; i--)
led_classdev_unregister(&p->leds[i].led_cdev);
return err;
}
}
platform_set_drvdata(pdev, p);
return 0;
}
static int sunfire_led_generic_remove(struct platform_device *pdev)
{
struct sunfire_drvdata *p = platform_get_drvdata(pdev);
int i;
for (i = 0; i < NUM_LEDS_PER_BOARD; i++)
led_classdev_unregister(&p->leds[i].led_cdev);
return 0;
}
static struct led_type clockboard_led_types[NUM_LEDS_PER_BOARD] = {
{
.name = "clockboard-left",
.handler = clockboard_left_set,
},
{
.name = "clockboard-middle",
.handler = clockboard_middle_set,
},
{
.name = "clockboard-right",
.handler = clockboard_right_set,
.default_trigger = "heartbeat",
},
};
static int sunfire_clockboard_led_probe(struct platform_device *pdev)
{
return sunfire_led_generic_probe(pdev, clockboard_led_types);
}
static struct led_type fhc_led_types[NUM_LEDS_PER_BOARD] = {
{
.name = "fhc-left",
.handler = fhc_left_set,
},
{
.name = "fhc-middle",
.handler = fhc_middle_set,
},
{
.name = "fhc-right",
.handler = fhc_right_set,
.default_trigger = "heartbeat",
},
};
static int sunfire_fhc_led_probe(struct platform_device *pdev)
{
return sunfire_led_generic_probe(pdev, fhc_led_types);
}
MODULE_ALIAS("platform:sunfire-clockboard-leds");
MODULE_ALIAS("platform:sunfire-fhc-leds");
static struct platform_driver sunfire_clockboard_led_driver = {
.probe = sunfire_clockboard_led_probe,
.remove = sunfire_led_generic_remove,
.driver = {
.name = "sunfire-clockboard-leds",
},
};
static struct platform_driver sunfire_fhc_led_driver = {
.probe = sunfire_fhc_led_probe,
.remove = sunfire_led_generic_remove,
.driver = {
.name = "sunfire-fhc-leds",
},
};
static struct platform_driver * const drivers[] = {
&sunfire_clockboard_led_driver,
&sunfire_fhc_led_driver,
};
static int __init sunfire_leds_init(void)
{
return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
}
static void __exit sunfire_leds_exit(void)
{
platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
}
module_init(sunfire_leds_init);
module_exit(sunfire_leds_exit);
| linux-master | drivers/leds/leds-sunfire.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* leds-lm3533.c -- LM3533 LED driver
*
* Copyright (C) 2011-2012 Texas Instruments
*
* Author: Johan Hovold <[email protected]>
*/
#include <linux/module.h>
#include <linux/leds.h>
#include <linux/mfd/core.h>
#include <linux/mutex.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/mfd/lm3533.h>
#define LM3533_LVCTRLBANK_MIN 2
#define LM3533_LVCTRLBANK_MAX 5
#define LM3533_LVCTRLBANK_COUNT 4
#define LM3533_RISEFALLTIME_MAX 7
#define LM3533_ALS_CHANNEL_LV_MIN 1
#define LM3533_ALS_CHANNEL_LV_MAX 2
#define LM3533_REG_CTRLBANK_BCONF_BASE 0x1b
#define LM3533_REG_PATTERN_ENABLE 0x28
#define LM3533_REG_PATTERN_LOW_TIME_BASE 0x71
#define LM3533_REG_PATTERN_HIGH_TIME_BASE 0x72
#define LM3533_REG_PATTERN_RISETIME_BASE 0x74
#define LM3533_REG_PATTERN_FALLTIME_BASE 0x75
#define LM3533_REG_PATTERN_STEP 0x10
#define LM3533_REG_CTRLBANK_BCONF_MAPPING_MASK 0x04
#define LM3533_REG_CTRLBANK_BCONF_ALS_EN_MASK 0x02
#define LM3533_REG_CTRLBANK_BCONF_ALS_CHANNEL_MASK 0x01
#define LM3533_LED_FLAG_PATTERN_ENABLE 1
struct lm3533_led {
struct lm3533 *lm3533;
struct lm3533_ctrlbank cb;
struct led_classdev cdev;
int id;
struct mutex mutex;
unsigned long flags;
};
static inline struct lm3533_led *to_lm3533_led(struct led_classdev *cdev)
{
return container_of(cdev, struct lm3533_led, cdev);
}
static inline int lm3533_led_get_ctrlbank_id(struct lm3533_led *led)
{
return led->id + 2;
}
static inline u8 lm3533_led_get_lv_reg(struct lm3533_led *led, u8 base)
{
return base + led->id;
}
static inline u8 lm3533_led_get_pattern(struct lm3533_led *led)
{
return led->id;
}
static inline u8 lm3533_led_get_pattern_reg(struct lm3533_led *led,
u8 base)
{
return base + lm3533_led_get_pattern(led) * LM3533_REG_PATTERN_STEP;
}
static int lm3533_led_pattern_enable(struct lm3533_led *led, int enable)
{
u8 mask;
u8 val;
int pattern;
int state;
int ret = 0;
dev_dbg(led->cdev.dev, "%s - %d\n", __func__, enable);
mutex_lock(&led->mutex);
state = test_bit(LM3533_LED_FLAG_PATTERN_ENABLE, &led->flags);
if ((enable && state) || (!enable && !state))
goto out;
pattern = lm3533_led_get_pattern(led);
mask = 1 << (2 * pattern);
if (enable)
val = mask;
else
val = 0;
ret = lm3533_update(led->lm3533, LM3533_REG_PATTERN_ENABLE, val, mask);
if (ret) {
dev_err(led->cdev.dev, "failed to enable pattern %d (%d)\n",
pattern, enable);
goto out;
}
__change_bit(LM3533_LED_FLAG_PATTERN_ENABLE, &led->flags);
out:
mutex_unlock(&led->mutex);
return ret;
}
static int lm3533_led_set(struct led_classdev *cdev,
enum led_brightness value)
{
struct lm3533_led *led = to_lm3533_led(cdev);
dev_dbg(led->cdev.dev, "%s - %d\n", __func__, value);
if (value == 0)
lm3533_led_pattern_enable(led, 0); /* disable blink */
return lm3533_ctrlbank_set_brightness(&led->cb, value);
}
static enum led_brightness lm3533_led_get(struct led_classdev *cdev)
{
struct lm3533_led *led = to_lm3533_led(cdev);
u8 val;
int ret;
ret = lm3533_ctrlbank_get_brightness(&led->cb, &val);
if (ret)
return ret;
dev_dbg(led->cdev.dev, "%s - %u\n", __func__, val);
return val;
}
/* Pattern generator defines (delays in us). */
#define LM3533_LED_DELAY1_VMIN 0x00
#define LM3533_LED_DELAY2_VMIN 0x3d
#define LM3533_LED_DELAY3_VMIN 0x80
#define LM3533_LED_DELAY1_VMAX (LM3533_LED_DELAY2_VMIN - 1)
#define LM3533_LED_DELAY2_VMAX (LM3533_LED_DELAY3_VMIN - 1)
#define LM3533_LED_DELAY3_VMAX 0xff
#define LM3533_LED_DELAY1_TMIN 16384U
#define LM3533_LED_DELAY2_TMIN 1130496U
#define LM3533_LED_DELAY3_TMIN 10305536U
#define LM3533_LED_DELAY1_TMAX 999424U
#define LM3533_LED_DELAY2_TMAX 9781248U
#define LM3533_LED_DELAY3_TMAX 76890112U
/* t_step = (t_max - t_min) / (v_max - v_min) */
#define LM3533_LED_DELAY1_TSTEP 16384
#define LM3533_LED_DELAY2_TSTEP 131072
#define LM3533_LED_DELAY3_TSTEP 524288
/* Delay limits for hardware accelerated blinking (in ms). */
#define LM3533_LED_DELAY_ON_MAX \
((LM3533_LED_DELAY2_TMAX + LM3533_LED_DELAY2_TSTEP / 2) / 1000)
#define LM3533_LED_DELAY_OFF_MAX \
((LM3533_LED_DELAY3_TMAX + LM3533_LED_DELAY3_TSTEP / 2) / 1000)
/*
* Returns linear map of *t from [t_min,t_max] to [v_min,v_max] with a step
* size of t_step, where
*
* t_step = (t_max - t_min) / (v_max - v_min)
*
* and updates *t to reflect the mapped value.
*/
static u8 time_to_val(unsigned *t, unsigned t_min, unsigned t_step,
u8 v_min, u8 v_max)
{
unsigned val;
val = (*t + t_step / 2 - t_min) / t_step + v_min;
*t = t_step * (val - v_min) + t_min;
return (u8)val;
}
/*
* Returns time code corresponding to *delay (in ms) and updates *delay to
* reflect actual hardware delay.
*
* Hardware supports 256 discrete delay times, divided into three groups with
* the following ranges and step-sizes:
*
* [ 16, 999] [0x00, 0x3e] step 16 ms
* [ 1130, 9781] [0x3d, 0x7f] step 131 ms
* [10306, 76890] [0x80, 0xff] step 524 ms
*
* Note that delay group 3 is only available for delay_off.
*/
static u8 lm3533_led_get_hw_delay(unsigned *delay)
{
unsigned t;
u8 val;
t = *delay * 1000;
if (t >= (LM3533_LED_DELAY2_TMAX + LM3533_LED_DELAY3_TMIN) / 2) {
t = clamp(t, LM3533_LED_DELAY3_TMIN, LM3533_LED_DELAY3_TMAX);
val = time_to_val(&t, LM3533_LED_DELAY3_TMIN,
LM3533_LED_DELAY3_TSTEP,
LM3533_LED_DELAY3_VMIN,
LM3533_LED_DELAY3_VMAX);
} else if (t >= (LM3533_LED_DELAY1_TMAX + LM3533_LED_DELAY2_TMIN) / 2) {
t = clamp(t, LM3533_LED_DELAY2_TMIN, LM3533_LED_DELAY2_TMAX);
val = time_to_val(&t, LM3533_LED_DELAY2_TMIN,
LM3533_LED_DELAY2_TSTEP,
LM3533_LED_DELAY2_VMIN,
LM3533_LED_DELAY2_VMAX);
} else {
t = clamp(t, LM3533_LED_DELAY1_TMIN, LM3533_LED_DELAY1_TMAX);
val = time_to_val(&t, LM3533_LED_DELAY1_TMIN,
LM3533_LED_DELAY1_TSTEP,
LM3533_LED_DELAY1_VMIN,
LM3533_LED_DELAY1_VMAX);
}
*delay = (t + 500) / 1000;
return val;
}
/*
* Set delay register base to *delay (in ms) and update *delay to reflect
* actual hardware delay used.
*/
static u8 lm3533_led_delay_set(struct lm3533_led *led, u8 base,
unsigned long *delay)
{
unsigned t;
u8 val;
u8 reg;
int ret;
t = (unsigned)*delay;
/* Delay group 3 is only available for low time (delay off). */
if (base != LM3533_REG_PATTERN_LOW_TIME_BASE)
t = min(t, LM3533_LED_DELAY2_TMAX / 1000);
val = lm3533_led_get_hw_delay(&t);
dev_dbg(led->cdev.dev, "%s - %lu: %u (0x%02x)\n", __func__,
*delay, t, val);
reg = lm3533_led_get_pattern_reg(led, base);
ret = lm3533_write(led->lm3533, reg, val);
if (ret)
dev_err(led->cdev.dev, "failed to set delay (%02x)\n", reg);
*delay = t;
return ret;
}
static int lm3533_led_delay_on_set(struct lm3533_led *led, unsigned long *t)
{
return lm3533_led_delay_set(led, LM3533_REG_PATTERN_HIGH_TIME_BASE, t);
}
static int lm3533_led_delay_off_set(struct lm3533_led *led, unsigned long *t)
{
return lm3533_led_delay_set(led, LM3533_REG_PATTERN_LOW_TIME_BASE, t);
}
static int lm3533_led_blink_set(struct led_classdev *cdev,
unsigned long *delay_on,
unsigned long *delay_off)
{
struct lm3533_led *led = to_lm3533_led(cdev);
int ret;
dev_dbg(led->cdev.dev, "%s - on = %lu, off = %lu\n", __func__,
*delay_on, *delay_off);
if (*delay_on > LM3533_LED_DELAY_ON_MAX ||
*delay_off > LM3533_LED_DELAY_OFF_MAX)
return -EINVAL;
if (*delay_on == 0 && *delay_off == 0) {
*delay_on = 500;
*delay_off = 500;
}
ret = lm3533_led_delay_on_set(led, delay_on);
if (ret)
return ret;
ret = lm3533_led_delay_off_set(led, delay_off);
if (ret)
return ret;
return lm3533_led_pattern_enable(led, 1);
}
static ssize_t show_id(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct lm3533_led *led = to_lm3533_led(led_cdev);
return sysfs_emit(buf, "%d\n", led->id);
}
/*
* Pattern generator rise/fall times:
*
* 0 - 2048 us (default)
* 1 - 262 ms
* 2 - 524 ms
* 3 - 1.049 s
* 4 - 2.097 s
* 5 - 4.194 s
* 6 - 8.389 s
* 7 - 16.78 s
*/
static ssize_t show_risefalltime(struct device *dev,
struct device_attribute *attr,
char *buf, u8 base)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct lm3533_led *led = to_lm3533_led(led_cdev);
ssize_t ret;
u8 reg;
u8 val;
reg = lm3533_led_get_pattern_reg(led, base);
ret = lm3533_read(led->lm3533, reg, &val);
if (ret)
return ret;
return sysfs_emit(buf, "%x\n", val);
}
static ssize_t show_risetime(struct device *dev,
struct device_attribute *attr, char *buf)
{
return show_risefalltime(dev, attr, buf,
LM3533_REG_PATTERN_RISETIME_BASE);
}
static ssize_t show_falltime(struct device *dev,
struct device_attribute *attr, char *buf)
{
return show_risefalltime(dev, attr, buf,
LM3533_REG_PATTERN_FALLTIME_BASE);
}
static ssize_t store_risefalltime(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t len, u8 base)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct lm3533_led *led = to_lm3533_led(led_cdev);
u8 val;
u8 reg;
int ret;
if (kstrtou8(buf, 0, &val) || val > LM3533_RISEFALLTIME_MAX)
return -EINVAL;
reg = lm3533_led_get_pattern_reg(led, base);
ret = lm3533_write(led->lm3533, reg, val);
if (ret)
return ret;
return len;
}
static ssize_t store_risetime(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t len)
{
return store_risefalltime(dev, attr, buf, len,
LM3533_REG_PATTERN_RISETIME_BASE);
}
static ssize_t store_falltime(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t len)
{
return store_risefalltime(dev, attr, buf, len,
LM3533_REG_PATTERN_FALLTIME_BASE);
}
static ssize_t show_als_channel(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct lm3533_led *led = to_lm3533_led(led_cdev);
unsigned channel;
u8 reg;
u8 val;
int ret;
reg = lm3533_led_get_lv_reg(led, LM3533_REG_CTRLBANK_BCONF_BASE);
ret = lm3533_read(led->lm3533, reg, &val);
if (ret)
return ret;
channel = (val & LM3533_REG_CTRLBANK_BCONF_ALS_CHANNEL_MASK) + 1;
return sysfs_emit(buf, "%u\n", channel);
}
static ssize_t store_als_channel(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t len)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct lm3533_led *led = to_lm3533_led(led_cdev);
unsigned channel;
u8 reg;
u8 val;
u8 mask;
int ret;
if (kstrtouint(buf, 0, &channel))
return -EINVAL;
if (channel < LM3533_ALS_CHANNEL_LV_MIN ||
channel > LM3533_ALS_CHANNEL_LV_MAX)
return -EINVAL;
reg = lm3533_led_get_lv_reg(led, LM3533_REG_CTRLBANK_BCONF_BASE);
mask = LM3533_REG_CTRLBANK_BCONF_ALS_CHANNEL_MASK;
val = channel - 1;
ret = lm3533_update(led->lm3533, reg, val, mask);
if (ret)
return ret;
return len;
}
static ssize_t show_als_en(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct lm3533_led *led = to_lm3533_led(led_cdev);
bool enable;
u8 reg;
u8 val;
int ret;
reg = lm3533_led_get_lv_reg(led, LM3533_REG_CTRLBANK_BCONF_BASE);
ret = lm3533_read(led->lm3533, reg, &val);
if (ret)
return ret;
enable = val & LM3533_REG_CTRLBANK_BCONF_ALS_EN_MASK;
return sysfs_emit(buf, "%d\n", enable);
}
static ssize_t store_als_en(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t len)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct lm3533_led *led = to_lm3533_led(led_cdev);
unsigned enable;
u8 reg;
u8 mask;
u8 val;
int ret;
if (kstrtouint(buf, 0, &enable))
return -EINVAL;
reg = lm3533_led_get_lv_reg(led, LM3533_REG_CTRLBANK_BCONF_BASE);
mask = LM3533_REG_CTRLBANK_BCONF_ALS_EN_MASK;
if (enable)
val = mask;
else
val = 0;
ret = lm3533_update(led->lm3533, reg, val, mask);
if (ret)
return ret;
return len;
}
static ssize_t show_linear(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct lm3533_led *led = to_lm3533_led(led_cdev);
u8 reg;
u8 val;
int linear;
int ret;
reg = lm3533_led_get_lv_reg(led, LM3533_REG_CTRLBANK_BCONF_BASE);
ret = lm3533_read(led->lm3533, reg, &val);
if (ret)
return ret;
if (val & LM3533_REG_CTRLBANK_BCONF_MAPPING_MASK)
linear = 1;
else
linear = 0;
return sysfs_emit(buf, "%x\n", linear);
}
static ssize_t store_linear(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t len)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct lm3533_led *led = to_lm3533_led(led_cdev);
unsigned long linear;
u8 reg;
u8 mask;
u8 val;
int ret;
if (kstrtoul(buf, 0, &linear))
return -EINVAL;
reg = lm3533_led_get_lv_reg(led, LM3533_REG_CTRLBANK_BCONF_BASE);
mask = LM3533_REG_CTRLBANK_BCONF_MAPPING_MASK;
if (linear)
val = mask;
else
val = 0;
ret = lm3533_update(led->lm3533, reg, val, mask);
if (ret)
return ret;
return len;
}
static ssize_t show_pwm(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct lm3533_led *led = to_lm3533_led(led_cdev);
u8 val;
int ret;
ret = lm3533_ctrlbank_get_pwm(&led->cb, &val);
if (ret)
return ret;
return sysfs_emit(buf, "%u\n", val);
}
static ssize_t store_pwm(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t len)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct lm3533_led *led = to_lm3533_led(led_cdev);
u8 val;
int ret;
if (kstrtou8(buf, 0, &val))
return -EINVAL;
ret = lm3533_ctrlbank_set_pwm(&led->cb, val);
if (ret)
return ret;
return len;
}
static LM3533_ATTR_RW(als_channel);
static LM3533_ATTR_RW(als_en);
static LM3533_ATTR_RW(falltime);
static LM3533_ATTR_RO(id);
static LM3533_ATTR_RW(linear);
static LM3533_ATTR_RW(pwm);
static LM3533_ATTR_RW(risetime);
static struct attribute *lm3533_led_attributes[] = {
&dev_attr_als_channel.attr,
&dev_attr_als_en.attr,
&dev_attr_falltime.attr,
&dev_attr_id.attr,
&dev_attr_linear.attr,
&dev_attr_pwm.attr,
&dev_attr_risetime.attr,
NULL,
};
static umode_t lm3533_led_attr_is_visible(struct kobject *kobj,
struct attribute *attr, int n)
{
struct device *dev = kobj_to_dev(kobj);
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct lm3533_led *led = to_lm3533_led(led_cdev);
umode_t mode = attr->mode;
if (attr == &dev_attr_als_channel.attr ||
attr == &dev_attr_als_en.attr) {
if (!led->lm3533->have_als)
mode = 0;
}
return mode;
};
static const struct attribute_group lm3533_led_attribute_group = {
.is_visible = lm3533_led_attr_is_visible,
.attrs = lm3533_led_attributes
};
static const struct attribute_group *lm3533_led_attribute_groups[] = {
&lm3533_led_attribute_group,
NULL
};
static int lm3533_led_setup(struct lm3533_led *led,
struct lm3533_led_platform_data *pdata)
{
int ret;
ret = lm3533_ctrlbank_set_max_current(&led->cb, pdata->max_current);
if (ret)
return ret;
return lm3533_ctrlbank_set_pwm(&led->cb, pdata->pwm);
}
static int lm3533_led_probe(struct platform_device *pdev)
{
struct lm3533 *lm3533;
struct lm3533_led_platform_data *pdata;
struct lm3533_led *led;
int ret;
dev_dbg(&pdev->dev, "%s\n", __func__);
lm3533 = dev_get_drvdata(pdev->dev.parent);
if (!lm3533)
return -EINVAL;
pdata = dev_get_platdata(&pdev->dev);
if (!pdata) {
dev_err(&pdev->dev, "no platform data\n");
return -EINVAL;
}
if (pdev->id < 0 || pdev->id >= LM3533_LVCTRLBANK_COUNT) {
dev_err(&pdev->dev, "illegal LED id %d\n", pdev->id);
return -EINVAL;
}
led = devm_kzalloc(&pdev->dev, sizeof(*led), GFP_KERNEL);
if (!led)
return -ENOMEM;
led->lm3533 = lm3533;
led->cdev.name = pdata->name;
led->cdev.default_trigger = pdata->default_trigger;
led->cdev.brightness_set_blocking = lm3533_led_set;
led->cdev.brightness_get = lm3533_led_get;
led->cdev.blink_set = lm3533_led_blink_set;
led->cdev.brightness = LED_OFF;
led->cdev.groups = lm3533_led_attribute_groups;
led->id = pdev->id;
mutex_init(&led->mutex);
/* The class framework makes a callback to get brightness during
* registration so use parent device (for error reporting) until
* registered.
*/
led->cb.lm3533 = lm3533;
led->cb.id = lm3533_led_get_ctrlbank_id(led);
led->cb.dev = lm3533->dev;
platform_set_drvdata(pdev, led);
ret = led_classdev_register(pdev->dev.parent, &led->cdev);
if (ret) {
dev_err(&pdev->dev, "failed to register LED %d\n", pdev->id);
return ret;
}
led->cb.dev = led->cdev.dev;
ret = lm3533_led_setup(led, pdata);
if (ret)
goto err_deregister;
ret = lm3533_ctrlbank_enable(&led->cb);
if (ret)
goto err_deregister;
return 0;
err_deregister:
led_classdev_unregister(&led->cdev);
return ret;
}
static int lm3533_led_remove(struct platform_device *pdev)
{
struct lm3533_led *led = platform_get_drvdata(pdev);
dev_dbg(&pdev->dev, "%s\n", __func__);
lm3533_ctrlbank_disable(&led->cb);
led_classdev_unregister(&led->cdev);
return 0;
}
static void lm3533_led_shutdown(struct platform_device *pdev)
{
struct lm3533_led *led = platform_get_drvdata(pdev);
dev_dbg(&pdev->dev, "%s\n", __func__);
lm3533_ctrlbank_disable(&led->cb);
lm3533_led_set(&led->cdev, LED_OFF); /* disable blink */
}
static struct platform_driver lm3533_led_driver = {
.driver = {
.name = "lm3533-leds",
},
.probe = lm3533_led_probe,
.remove = lm3533_led_remove,
.shutdown = lm3533_led_shutdown,
};
module_platform_driver(lm3533_led_driver);
MODULE_AUTHOR("Johan Hovold <[email protected]>");
MODULE_DESCRIPTION("LM3533 LED driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:lm3533-leds");
| linux-master | drivers/leds/leds-lm3533.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* LED driver for PCA995x I2C LED drivers
*
* Copyright 2011 bct electronic GmbH
* Copyright 2013 Qtechnology/AS
* Copyright 2022 NXP
* Copyright 2023 Marek Vasut
*/
#include <linux/i2c.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/property.h>
#include <linux/regmap.h>
/* Register definition */
#define PCA995X_MODE1 0x00
#define PCA995X_MODE2 0x01
#define PCA995X_LEDOUT0 0x02
#define PCA9955B_PWM0 0x08
#define PCA9952_PWM0 0x0A
#define PCA9952_IREFALL 0x43
#define PCA9955B_IREFALL 0x45
/* Auto-increment disabled. Normal mode */
#define PCA995X_MODE1_CFG 0x00
/* LED select registers determine the source that drives LED outputs */
#define PCA995X_LED_OFF 0x0
#define PCA995X_LED_ON 0x1
#define PCA995X_LED_PWM_MODE 0x2
#define PCA995X_LDRX_MASK 0x3
#define PCA995X_LDRX_BITS 2
#define PCA995X_MAX_OUTPUTS 16
#define PCA995X_OUTPUTS_PER_REG 4
#define PCA995X_IREFALL_FULL_CFG 0xFF
#define PCA995X_IREFALL_HALF_CFG (PCA995X_IREFALL_FULL_CFG / 2)
#define PCA995X_TYPE_NON_B 0
#define PCA995X_TYPE_B 1
#define ldev_to_led(c) container_of(c, struct pca995x_led, ldev)
struct pca995x_led {
unsigned int led_no;
struct led_classdev ldev;
struct pca995x_chip *chip;
};
struct pca995x_chip {
struct regmap *regmap;
struct pca995x_led leds[PCA995X_MAX_OUTPUTS];
int btype;
};
static int pca995x_brightness_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
struct pca995x_led *led = ldev_to_led(led_cdev);
struct pca995x_chip *chip = led->chip;
u8 ledout_addr, pwmout_addr;
int shift, ret;
pwmout_addr = (chip->btype ? PCA9955B_PWM0 : PCA9952_PWM0) + led->led_no;
ledout_addr = PCA995X_LEDOUT0 + (led->led_no / PCA995X_OUTPUTS_PER_REG);
shift = PCA995X_LDRX_BITS * (led->led_no % PCA995X_OUTPUTS_PER_REG);
switch (brightness) {
case LED_FULL:
return regmap_update_bits(chip->regmap, ledout_addr,
PCA995X_LDRX_MASK << shift,
PCA995X_LED_ON << shift);
case LED_OFF:
return regmap_update_bits(chip->regmap, ledout_addr,
PCA995X_LDRX_MASK << shift, 0);
default:
/* Adjust brightness as per user input by changing individual PWM */
ret = regmap_write(chip->regmap, pwmout_addr, brightness);
if (ret)
return ret;
/*
* Change LDRx configuration to individual brightness via PWM.
* LED will stop blinking if it's doing so.
*/
return regmap_update_bits(chip->regmap, ledout_addr,
PCA995X_LDRX_MASK << shift,
PCA995X_LED_PWM_MODE << shift);
}
}
static const struct regmap_config pca995x_regmap = {
.reg_bits = 8,
.val_bits = 8,
.max_register = 0x49,
};
static int pca995x_probe(struct i2c_client *client)
{
struct fwnode_handle *led_fwnodes[PCA995X_MAX_OUTPUTS] = { 0 };
struct fwnode_handle *np, *child;
struct device *dev = &client->dev;
struct pca995x_chip *chip;
struct pca995x_led *led;
int i, btype, reg, ret;
btype = (unsigned long)device_get_match_data(&client->dev);
np = dev_fwnode(dev);
if (!np)
return -ENODEV;
chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
if (!chip)
return -ENOMEM;
chip->btype = btype;
chip->regmap = devm_regmap_init_i2c(client, &pca995x_regmap);
if (IS_ERR(chip->regmap))
return PTR_ERR(chip->regmap);
i2c_set_clientdata(client, chip);
fwnode_for_each_available_child_node(np, child) {
ret = fwnode_property_read_u32(child, "reg", ®);
if (ret) {
fwnode_handle_put(child);
return ret;
}
if (reg < 0 || reg >= PCA995X_MAX_OUTPUTS || led_fwnodes[reg]) {
fwnode_handle_put(child);
return -EINVAL;
}
led = &chip->leds[reg];
led_fwnodes[reg] = child;
led->chip = chip;
led->led_no = reg;
led->ldev.brightness_set_blocking = pca995x_brightness_set;
led->ldev.max_brightness = 255;
}
for (i = 0; i < PCA995X_MAX_OUTPUTS; i++) {
struct led_init_data init_data = {};
if (!led_fwnodes[i])
continue;
init_data.fwnode = led_fwnodes[i];
ret = devm_led_classdev_register_ext(dev,
&chip->leds[i].ldev,
&init_data);
if (ret < 0) {
fwnode_handle_put(child);
return dev_err_probe(dev, ret,
"Could not register LED %s\n",
chip->leds[i].ldev.name);
}
}
/* Disable LED all-call address and set normal mode */
ret = regmap_write(chip->regmap, PCA995X_MODE1, PCA995X_MODE1_CFG);
if (ret)
return ret;
/* IREF Output current value for all LEDn outputs */
return regmap_write(chip->regmap,
btype ? PCA9955B_IREFALL : PCA9952_IREFALL,
PCA995X_IREFALL_HALF_CFG);
}
static const struct i2c_device_id pca995x_id[] = {
{ "pca9952", .driver_data = (kernel_ulong_t)PCA995X_TYPE_NON_B },
{ "pca9955b", .driver_data = (kernel_ulong_t)PCA995X_TYPE_B },
{}
};
MODULE_DEVICE_TABLE(i2c, pca995x_id);
static const struct of_device_id pca995x_of_match[] = {
{ .compatible = "nxp,pca9952", .data = (void *)PCA995X_TYPE_NON_B },
{ .compatible = "nxp,pca9955b", .data = (void *)PCA995X_TYPE_B },
{},
};
MODULE_DEVICE_TABLE(of, pca995x_of_match);
static struct i2c_driver pca995x_driver = {
.driver = {
.name = "leds-pca995x",
.of_match_table = pca995x_of_match,
},
.probe = pca995x_probe,
.id_table = pca995x_id,
};
module_i2c_driver(pca995x_driver);
MODULE_AUTHOR("Isai Gaspar <[email protected]>");
MODULE_DESCRIPTION("PCA995x LED driver");
MODULE_LICENSE("GPL");
| linux-master | drivers/leds/leds-pca995x.c |
// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2018 Spreadtrum Communications Inc.
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
/* PMIC global control register definition */
#define SC27XX_MODULE_EN0 0xc08
#define SC27XX_CLK_EN0 0xc18
#define SC27XX_RGB_CTRL 0xebc
#define SC27XX_BLTC_EN BIT(9)
#define SC27XX_RTC_EN BIT(7)
#define SC27XX_RGB_PD BIT(0)
/* Breathing light controller register definition */
#define SC27XX_LEDS_CTRL 0x00
#define SC27XX_LEDS_PRESCALE 0x04
#define SC27XX_LEDS_DUTY 0x08
#define SC27XX_LEDS_CURVE0 0x0c
#define SC27XX_LEDS_CURVE1 0x10
#define SC27XX_CTRL_SHIFT 4
#define SC27XX_LED_RUN BIT(0)
#define SC27XX_LED_TYPE BIT(1)
#define SC27XX_DUTY_SHIFT 8
#define SC27XX_DUTY_MASK GENMASK(15, 0)
#define SC27XX_MOD_MASK GENMASK(7, 0)
#define SC27XX_CURVE_SHIFT 8
#define SC27XX_CURVE_L_MASK GENMASK(7, 0)
#define SC27XX_CURVE_H_MASK GENMASK(15, 8)
#define SC27XX_LEDS_OFFSET 0x10
#define SC27XX_LEDS_MAX 3
#define SC27XX_LEDS_PATTERN_CNT 4
/* Stage duration step, in milliseconds */
#define SC27XX_LEDS_STEP 125
/* Minimum and maximum duration, in milliseconds */
#define SC27XX_DELTA_T_MIN SC27XX_LEDS_STEP
#define SC27XX_DELTA_T_MAX (SC27XX_LEDS_STEP * 255)
struct sc27xx_led {
struct fwnode_handle *fwnode;
struct led_classdev ldev;
struct sc27xx_led_priv *priv;
u8 line;
bool active;
};
struct sc27xx_led_priv {
struct sc27xx_led leds[SC27XX_LEDS_MAX];
struct regmap *regmap;
struct mutex lock;
u32 base;
};
#define to_sc27xx_led(ldev) \
container_of(ldev, struct sc27xx_led, ldev)
static int sc27xx_led_init(struct regmap *regmap)
{
int err;
err = regmap_update_bits(regmap, SC27XX_MODULE_EN0, SC27XX_BLTC_EN,
SC27XX_BLTC_EN);
if (err)
return err;
err = regmap_update_bits(regmap, SC27XX_CLK_EN0, SC27XX_RTC_EN,
SC27XX_RTC_EN);
if (err)
return err;
return regmap_update_bits(regmap, SC27XX_RGB_CTRL, SC27XX_RGB_PD, 0);
}
static u32 sc27xx_led_get_offset(struct sc27xx_led *leds)
{
return leds->priv->base + SC27XX_LEDS_OFFSET * leds->line;
}
static int sc27xx_led_enable(struct sc27xx_led *leds, enum led_brightness value)
{
u32 base = sc27xx_led_get_offset(leds);
u32 ctrl_base = leds->priv->base + SC27XX_LEDS_CTRL;
u8 ctrl_shift = SC27XX_CTRL_SHIFT * leds->line;
struct regmap *regmap = leds->priv->regmap;
int err;
err = regmap_update_bits(regmap, base + SC27XX_LEDS_DUTY,
SC27XX_DUTY_MASK,
(value << SC27XX_DUTY_SHIFT) |
SC27XX_MOD_MASK);
if (err)
return err;
return regmap_update_bits(regmap, ctrl_base,
(SC27XX_LED_RUN | SC27XX_LED_TYPE) << ctrl_shift,
(SC27XX_LED_RUN | SC27XX_LED_TYPE) << ctrl_shift);
}
static int sc27xx_led_disable(struct sc27xx_led *leds)
{
struct regmap *regmap = leds->priv->regmap;
u32 ctrl_base = leds->priv->base + SC27XX_LEDS_CTRL;
u8 ctrl_shift = SC27XX_CTRL_SHIFT * leds->line;
return regmap_update_bits(regmap, ctrl_base,
(SC27XX_LED_RUN | SC27XX_LED_TYPE) << ctrl_shift, 0);
}
static int sc27xx_led_set(struct led_classdev *ldev, enum led_brightness value)
{
struct sc27xx_led *leds = to_sc27xx_led(ldev);
int err;
mutex_lock(&leds->priv->lock);
if (value == LED_OFF)
err = sc27xx_led_disable(leds);
else
err = sc27xx_led_enable(leds, value);
mutex_unlock(&leds->priv->lock);
return err;
}
static void sc27xx_led_clamp_align_delta_t(u32 *delta_t)
{
u32 v, offset, t = *delta_t;
v = t + SC27XX_LEDS_STEP / 2;
v = clamp_t(u32, v, SC27XX_DELTA_T_MIN, SC27XX_DELTA_T_MAX);
offset = v - SC27XX_DELTA_T_MIN;
offset = SC27XX_LEDS_STEP * (offset / SC27XX_LEDS_STEP);
*delta_t = SC27XX_DELTA_T_MIN + offset;
}
static int sc27xx_led_pattern_clear(struct led_classdev *ldev)
{
struct sc27xx_led *leds = to_sc27xx_led(ldev);
struct regmap *regmap = leds->priv->regmap;
u32 base = sc27xx_led_get_offset(leds);
u32 ctrl_base = leds->priv->base + SC27XX_LEDS_CTRL;
u8 ctrl_shift = SC27XX_CTRL_SHIFT * leds->line;
int err;
mutex_lock(&leds->priv->lock);
/* Reset the rise, high, fall and low time to zero. */
regmap_write(regmap, base + SC27XX_LEDS_CURVE0, 0);
regmap_write(regmap, base + SC27XX_LEDS_CURVE1, 0);
err = regmap_update_bits(regmap, ctrl_base,
(SC27XX_LED_RUN | SC27XX_LED_TYPE) << ctrl_shift, 0);
ldev->brightness = LED_OFF;
mutex_unlock(&leds->priv->lock);
return err;
}
static int sc27xx_led_pattern_set(struct led_classdev *ldev,
struct led_pattern *pattern,
u32 len, int repeat)
{
struct sc27xx_led *leds = to_sc27xx_led(ldev);
u32 base = sc27xx_led_get_offset(leds);
u32 ctrl_base = leds->priv->base + SC27XX_LEDS_CTRL;
u8 ctrl_shift = SC27XX_CTRL_SHIFT * leds->line;
struct regmap *regmap = leds->priv->regmap;
int err;
/*
* Must contain 4 tuples to configure the rise time, high time, fall
* time and low time to enable the breathing mode.
*/
if (len != SC27XX_LEDS_PATTERN_CNT)
return -EINVAL;
mutex_lock(&leds->priv->lock);
sc27xx_led_clamp_align_delta_t(&pattern[0].delta_t);
err = regmap_update_bits(regmap, base + SC27XX_LEDS_CURVE0,
SC27XX_CURVE_L_MASK,
pattern[0].delta_t / SC27XX_LEDS_STEP);
if (err)
goto out;
sc27xx_led_clamp_align_delta_t(&pattern[1].delta_t);
err = regmap_update_bits(regmap, base + SC27XX_LEDS_CURVE1,
SC27XX_CURVE_L_MASK,
pattern[1].delta_t / SC27XX_LEDS_STEP);
if (err)
goto out;
sc27xx_led_clamp_align_delta_t(&pattern[2].delta_t);
err = regmap_update_bits(regmap, base + SC27XX_LEDS_CURVE0,
SC27XX_CURVE_H_MASK,
(pattern[2].delta_t / SC27XX_LEDS_STEP) <<
SC27XX_CURVE_SHIFT);
if (err)
goto out;
sc27xx_led_clamp_align_delta_t(&pattern[3].delta_t);
err = regmap_update_bits(regmap, base + SC27XX_LEDS_CURVE1,
SC27XX_CURVE_H_MASK,
(pattern[3].delta_t / SC27XX_LEDS_STEP) <<
SC27XX_CURVE_SHIFT);
if (err)
goto out;
err = regmap_update_bits(regmap, base + SC27XX_LEDS_DUTY,
SC27XX_DUTY_MASK,
(pattern[1].brightness << SC27XX_DUTY_SHIFT) |
SC27XX_MOD_MASK);
if (err)
goto out;
/* Enable the LED breathing mode */
err = regmap_update_bits(regmap, ctrl_base,
SC27XX_LED_RUN << ctrl_shift,
SC27XX_LED_RUN << ctrl_shift);
if (!err)
ldev->brightness = pattern[1].brightness;
out:
mutex_unlock(&leds->priv->lock);
return err;
}
static int sc27xx_led_register(struct device *dev, struct sc27xx_led_priv *priv)
{
int i, err;
err = sc27xx_led_init(priv->regmap);
if (err)
return err;
for (i = 0; i < SC27XX_LEDS_MAX; i++) {
struct sc27xx_led *led = &priv->leds[i];
struct led_init_data init_data = {};
if (!led->active)
continue;
led->line = i;
led->priv = priv;
led->ldev.brightness_set_blocking = sc27xx_led_set;
led->ldev.pattern_set = sc27xx_led_pattern_set;
led->ldev.pattern_clear = sc27xx_led_pattern_clear;
led->ldev.default_trigger = "pattern";
init_data.fwnode = led->fwnode;
init_data.devicename = "sc27xx";
init_data.default_label = ":";
err = devm_led_classdev_register_ext(dev, &led->ldev,
&init_data);
if (err)
return err;
}
return 0;
}
static int sc27xx_led_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev_of_node(dev), *child;
struct sc27xx_led_priv *priv;
u32 base, count, reg;
int err;
count = of_get_available_child_count(np);
if (!count || count > SC27XX_LEDS_MAX)
return -EINVAL;
err = of_property_read_u32(np, "reg", &base);
if (err) {
dev_err(dev, "fail to get reg of property\n");
return err;
}
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
platform_set_drvdata(pdev, priv);
mutex_init(&priv->lock);
priv->base = base;
priv->regmap = dev_get_regmap(dev->parent, NULL);
if (!priv->regmap) {
err = -ENODEV;
dev_err(dev, "failed to get regmap: %d\n", err);
return err;
}
for_each_available_child_of_node(np, child) {
err = of_property_read_u32(child, "reg", ®);
if (err) {
of_node_put(child);
mutex_destroy(&priv->lock);
return err;
}
if (reg >= SC27XX_LEDS_MAX || priv->leds[reg].active) {
of_node_put(child);
mutex_destroy(&priv->lock);
return -EINVAL;
}
priv->leds[reg].fwnode = of_fwnode_handle(child);
priv->leds[reg].active = true;
}
err = sc27xx_led_register(dev, priv);
if (err)
mutex_destroy(&priv->lock);
return err;
}
static int sc27xx_led_remove(struct platform_device *pdev)
{
struct sc27xx_led_priv *priv = platform_get_drvdata(pdev);
mutex_destroy(&priv->lock);
return 0;
}
static const struct of_device_id sc27xx_led_of_match[] = {
{ .compatible = "sprd,sc2731-bltc", },
{ }
};
MODULE_DEVICE_TABLE(of, sc27xx_led_of_match);
static struct platform_driver sc27xx_led_driver = {
.driver = {
.name = "sprd-bltc",
.of_match_table = sc27xx_led_of_match,
},
.probe = sc27xx_led_probe,
.remove = sc27xx_led_remove,
};
module_platform_driver(sc27xx_led_driver);
MODULE_DESCRIPTION("Spreadtrum SC27xx breathing light controller driver");
MODULE_AUTHOR("Xiaotong Lu <[email protected]>");
MODULE_AUTHOR("Baolin Wang <[email protected]>");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/leds-sc27xx-bltc.c |
// SPDX-License-Identifier: GPL-2.0
// LED Multicolor class interface
// Copyright (C) 2019-20 Texas Instruments Incorporated - http://www.ti.com/
// Author: Dan Murphy <[email protected]>
#include <linux/device.h>
#include <linux/init.h>
#include <linux/led-class-multicolor.h>
#include <linux/math.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include "leds.h"
int led_mc_calc_color_components(struct led_classdev_mc *mcled_cdev,
enum led_brightness brightness)
{
struct led_classdev *led_cdev = &mcled_cdev->led_cdev;
int i;
for (i = 0; i < mcled_cdev->num_colors; i++)
mcled_cdev->subled_info[i].brightness =
DIV_ROUND_CLOSEST(brightness *
mcled_cdev->subled_info[i].intensity,
led_cdev->max_brightness);
return 0;
}
EXPORT_SYMBOL_GPL(led_mc_calc_color_components);
static ssize_t multi_intensity_store(struct device *dev,
struct device_attribute *intensity_attr,
const char *buf, size_t size)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct led_classdev_mc *mcled_cdev = lcdev_to_mccdev(led_cdev);
int nrchars, offset = 0;
int intensity_value[LED_COLOR_ID_MAX];
int i;
ssize_t ret;
mutex_lock(&led_cdev->led_access);
for (i = 0; i < mcled_cdev->num_colors; i++) {
ret = sscanf(buf + offset, "%i%n",
&intensity_value[i], &nrchars);
if (ret != 1) {
ret = -EINVAL;
goto err_out;
}
offset += nrchars;
}
offset++;
if (offset < size) {
ret = -EINVAL;
goto err_out;
}
for (i = 0; i < mcled_cdev->num_colors; i++)
mcled_cdev->subled_info[i].intensity = intensity_value[i];
led_set_brightness(led_cdev, led_cdev->brightness);
ret = size;
err_out:
mutex_unlock(&led_cdev->led_access);
return ret;
}
static ssize_t multi_intensity_show(struct device *dev,
struct device_attribute *intensity_attr,
char *buf)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct led_classdev_mc *mcled_cdev = lcdev_to_mccdev(led_cdev);
int len = 0;
int i;
for (i = 0; i < mcled_cdev->num_colors; i++) {
len += sprintf(buf + len, "%d",
mcled_cdev->subled_info[i].intensity);
if (i < mcled_cdev->num_colors - 1)
len += sprintf(buf + len, " ");
}
buf[len++] = '\n';
return len;
}
static DEVICE_ATTR_RW(multi_intensity);
static ssize_t multi_index_show(struct device *dev,
struct device_attribute *multi_index_attr,
char *buf)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct led_classdev_mc *mcled_cdev = lcdev_to_mccdev(led_cdev);
int len = 0;
int index;
int i;
for (i = 0; i < mcled_cdev->num_colors; i++) {
index = mcled_cdev->subled_info[i].color_index;
len += sprintf(buf + len, "%s", led_colors[index]);
if (i < mcled_cdev->num_colors - 1)
len += sprintf(buf + len, " ");
}
buf[len++] = '\n';
return len;
}
static DEVICE_ATTR_RO(multi_index);
static struct attribute *led_multicolor_attrs[] = {
&dev_attr_multi_intensity.attr,
&dev_attr_multi_index.attr,
NULL,
};
ATTRIBUTE_GROUPS(led_multicolor);
int led_classdev_multicolor_register_ext(struct device *parent,
struct led_classdev_mc *mcled_cdev,
struct led_init_data *init_data)
{
struct led_classdev *led_cdev;
if (!mcled_cdev)
return -EINVAL;
if (mcled_cdev->num_colors <= 0)
return -EINVAL;
if (mcled_cdev->num_colors > LED_COLOR_ID_MAX)
return -EINVAL;
led_cdev = &mcled_cdev->led_cdev;
mcled_cdev->led_cdev.groups = led_multicolor_groups;
return led_classdev_register_ext(parent, led_cdev, init_data);
}
EXPORT_SYMBOL_GPL(led_classdev_multicolor_register_ext);
void led_classdev_multicolor_unregister(struct led_classdev_mc *mcled_cdev)
{
if (!mcled_cdev)
return;
led_classdev_unregister(&mcled_cdev->led_cdev);
}
EXPORT_SYMBOL_GPL(led_classdev_multicolor_unregister);
static void devm_led_classdev_multicolor_release(struct device *dev, void *res)
{
led_classdev_multicolor_unregister(*(struct led_classdev_mc **)res);
}
int devm_led_classdev_multicolor_register_ext(struct device *parent,
struct led_classdev_mc *mcled_cdev,
struct led_init_data *init_data)
{
struct led_classdev_mc **dr;
int ret;
dr = devres_alloc(devm_led_classdev_multicolor_release,
sizeof(*dr), GFP_KERNEL);
if (!dr)
return -ENOMEM;
ret = led_classdev_multicolor_register_ext(parent, mcled_cdev,
init_data);
if (ret) {
devres_free(dr);
return ret;
}
*dr = mcled_cdev;
devres_add(parent, dr);
return 0;
}
EXPORT_SYMBOL_GPL(devm_led_classdev_multicolor_register_ext);
static int devm_led_classdev_multicolor_match(struct device *dev,
void *res, void *data)
{
struct led_classdev_mc **p = res;
if (WARN_ON(!p || !*p))
return 0;
return *p == data;
}
void devm_led_classdev_multicolor_unregister(struct device *dev,
struct led_classdev_mc *mcled_cdev)
{
WARN_ON(devres_release(dev,
devm_led_classdev_multicolor_release,
devm_led_classdev_multicolor_match, mcled_cdev));
}
EXPORT_SYMBOL_GPL(devm_led_classdev_multicolor_unregister);
MODULE_AUTHOR("Dan Murphy <[email protected]>");
MODULE_DESCRIPTION("Multicolor LED class interface");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/led-class-multicolor.c |
// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2019 Christian Mauderer <[email protected]>
/*
* The driver supports controllers with a very simple SPI protocol:
* - one LED is controlled by a single byte on MOSI
* - the value of the byte gives the brightness between two values (lowest to
* highest)
* - no return value is necessary (no MISO signal)
*
* The value for minimum and maximum brightness depends on the device
* (compatible string).
*
* Supported devices:
* - "ubnt,acb-spi-led": Microcontroller (SONiX 8F26E611LA) based device used
* for example in Ubiquiti airCube ISP. Reverse engineered protocol for this
* controller:
* * Higher two bits set a mode. Lower six bits are a parameter.
* * Mode: 00 -> set brightness between 0x00 (min) and 0x3F (max)
* * Mode: 01 -> pulsing pattern (min -> max -> min) with an interval. From
* some tests, the period is about (50ms + 102ms * parameter). There is a
* slightly different pattern starting from 0x10 (longer gap between the
* pulses) but the time still follows that calculation.
* * Mode: 10 -> same as 01 but with only a ramp from min to max. Again a
* slight jump in the pattern at 0x10.
* * Mode: 11 -> blinking (off -> 25% -> off -> 25% -> ...) with a period of
* (105ms * parameter)
* NOTE: This driver currently only supports mode 00.
*/
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/spi/spi.h>
#include <linux/mutex.h>
#include <uapi/linux/uleds.h>
struct spi_byte_chipdef {
/* SPI byte that will be send to switch the LED off */
u8 off_value;
/* SPI byte that will be send to switch the LED to maximum brightness */
u8 max_value;
};
struct spi_byte_led {
struct led_classdev ldev;
struct spi_device *spi;
char name[LED_MAX_NAME_SIZE];
struct mutex mutex;
const struct spi_byte_chipdef *cdef;
};
static const struct spi_byte_chipdef ubnt_acb_spi_led_cdef = {
.off_value = 0x0,
.max_value = 0x3F,
};
static const struct of_device_id spi_byte_dt_ids[] = {
{ .compatible = "ubnt,acb-spi-led", .data = &ubnt_acb_spi_led_cdef },
{},
};
MODULE_DEVICE_TABLE(of, spi_byte_dt_ids);
static int spi_byte_brightness_set_blocking(struct led_classdev *dev,
enum led_brightness brightness)
{
struct spi_byte_led *led = container_of(dev, struct spi_byte_led, ldev);
u8 value;
int ret;
value = (u8) brightness + led->cdef->off_value;
mutex_lock(&led->mutex);
ret = spi_write(led->spi, &value, sizeof(value));
mutex_unlock(&led->mutex);
return ret;
}
static int spi_byte_probe(struct spi_device *spi)
{
struct device_node *child;
struct device *dev = &spi->dev;
struct spi_byte_led *led;
const char *name = "leds-spi-byte::";
const char *state;
int ret;
if (of_get_available_child_count(dev_of_node(dev)) != 1) {
dev_err(dev, "Device must have exactly one LED sub-node.");
return -EINVAL;
}
child = of_get_next_available_child(dev_of_node(dev), NULL);
led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL);
if (!led)
return -ENOMEM;
of_property_read_string(child, "label", &name);
strscpy(led->name, name, sizeof(led->name));
led->spi = spi;
mutex_init(&led->mutex);
led->cdef = device_get_match_data(dev);
led->ldev.name = led->name;
led->ldev.brightness = LED_OFF;
led->ldev.max_brightness = led->cdef->max_value - led->cdef->off_value;
led->ldev.brightness_set_blocking = spi_byte_brightness_set_blocking;
state = of_get_property(child, "default-state", NULL);
if (state) {
if (!strcmp(state, "on")) {
led->ldev.brightness = led->ldev.max_brightness;
} else if (strcmp(state, "off")) {
/* all other cases except "off" */
dev_err(dev, "default-state can only be 'on' or 'off'");
return -EINVAL;
}
}
spi_byte_brightness_set_blocking(&led->ldev,
led->ldev.brightness);
ret = devm_led_classdev_register(&spi->dev, &led->ldev);
if (ret) {
mutex_destroy(&led->mutex);
return ret;
}
spi_set_drvdata(spi, led);
return 0;
}
static void spi_byte_remove(struct spi_device *spi)
{
struct spi_byte_led *led = spi_get_drvdata(spi);
mutex_destroy(&led->mutex);
}
static struct spi_driver spi_byte_driver = {
.probe = spi_byte_probe,
.remove = spi_byte_remove,
.driver = {
.name = KBUILD_MODNAME,
.of_match_table = spi_byte_dt_ids,
},
};
module_spi_driver(spi_byte_driver);
MODULE_AUTHOR("Christian Mauderer <[email protected]>");
MODULE_DESCRIPTION("single byte SPI LED driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("spi:leds-spi-byte");
| linux-master | drivers/leds/leds-spi-byte.c |
// SPDX-License-Identifier: GPL-2.0
// TI LP50XX LED chip family driver
// Copyright (C) 2018-20 Texas Instruments Incorporated - https://www.ti.com/
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/leds.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <uapi/linux/uleds.h>
#include <linux/led-class-multicolor.h>
#include "leds.h"
#define LP50XX_DEV_CFG0 0x00
#define LP50XX_DEV_CFG1 0x01
#define LP50XX_LED_CFG0 0x02
/* LP5009 and LP5012 registers */
#define LP5012_BNK_BRT 0x03
#define LP5012_BNKA_CLR 0x04
#define LP5012_BNKB_CLR 0x05
#define LP5012_BNKC_CLR 0x06
#define LP5012_LED0_BRT 0x07
#define LP5012_OUT0_CLR 0x0b
#define LP5012_RESET 0x17
/* LP5018 and LP5024 registers */
#define LP5024_BNK_BRT 0x03
#define LP5024_BNKA_CLR 0x04
#define LP5024_BNKB_CLR 0x05
#define LP5024_BNKC_CLR 0x06
#define LP5024_LED0_BRT 0x07
#define LP5024_OUT0_CLR 0x0f
#define LP5024_RESET 0x27
/* LP5030 and LP5036 registers */
#define LP5036_LED_CFG1 0x03
#define LP5036_BNK_BRT 0x04
#define LP5036_BNKA_CLR 0x05
#define LP5036_BNKB_CLR 0x06
#define LP5036_BNKC_CLR 0x07
#define LP5036_LED0_BRT 0x08
#define LP5036_OUT0_CLR 0x14
#define LP5036_RESET 0x38
#define LP50XX_SW_RESET 0xff
#define LP50XX_CHIP_EN BIT(6)
/* There are 3 LED outputs per bank */
#define LP50XX_LEDS_PER_MODULE 3
#define LP5009_MAX_LED_MODULES 2
#define LP5012_MAX_LED_MODULES 4
#define LP5018_MAX_LED_MODULES 6
#define LP5024_MAX_LED_MODULES 8
#define LP5030_MAX_LED_MODULES 10
#define LP5036_MAX_LED_MODULES 12
static const struct reg_default lp5012_reg_defs[] = {
{LP50XX_DEV_CFG0, 0x0},
{LP50XX_DEV_CFG1, 0x3c},
{LP50XX_LED_CFG0, 0x0},
{LP5012_BNK_BRT, 0xff},
{LP5012_BNKA_CLR, 0x0f},
{LP5012_BNKB_CLR, 0x0f},
{LP5012_BNKC_CLR, 0x0f},
{LP5012_LED0_BRT, 0x0f},
/* LEDX_BRT registers are all 0xff for defaults */
{0x08, 0xff}, {0x09, 0xff}, {0x0a, 0xff},
{LP5012_OUT0_CLR, 0x0f},
/* OUTX_CLR registers are all 0x0 for defaults */
{0x0c, 0x00}, {0x0d, 0x00}, {0x0e, 0x00}, {0x0f, 0x00}, {0x10, 0x00},
{0x11, 0x00}, {0x12, 0x00}, {0x13, 0x00}, {0x14, 0x00}, {0x15, 0x00},
{0x16, 0x00},
{LP5012_RESET, 0x00}
};
static const struct reg_default lp5024_reg_defs[] = {
{LP50XX_DEV_CFG0, 0x0},
{LP50XX_DEV_CFG1, 0x3c},
{LP50XX_LED_CFG0, 0x0},
{LP5024_BNK_BRT, 0xff},
{LP5024_BNKA_CLR, 0x0f},
{LP5024_BNKB_CLR, 0x0f},
{LP5024_BNKC_CLR, 0x0f},
{LP5024_LED0_BRT, 0x0f},
/* LEDX_BRT registers are all 0xff for defaults */
{0x08, 0xff}, {0x09, 0xff}, {0x0a, 0xff}, {0x0b, 0xff}, {0x0c, 0xff},
{0x0d, 0xff}, {0x0e, 0xff},
{LP5024_OUT0_CLR, 0x0f},
/* OUTX_CLR registers are all 0x0 for defaults */
{0x10, 0x00}, {0x11, 0x00}, {0x12, 0x00}, {0x13, 0x00}, {0x14, 0x00},
{0x15, 0x00}, {0x16, 0x00}, {0x17, 0x00}, {0x18, 0x00}, {0x19, 0x00},
{0x1a, 0x00}, {0x1b, 0x00}, {0x1c, 0x00}, {0x1d, 0x00}, {0x1e, 0x00},
{0x1f, 0x00}, {0x20, 0x00}, {0x21, 0x00}, {0x22, 0x00}, {0x23, 0x00},
{0x24, 0x00}, {0x25, 0x00}, {0x26, 0x00},
{LP5024_RESET, 0x00}
};
static const struct reg_default lp5036_reg_defs[] = {
{LP50XX_DEV_CFG0, 0x0},
{LP50XX_DEV_CFG1, 0x3c},
{LP50XX_LED_CFG0, 0x0},
{LP5036_LED_CFG1, 0x0},
{LP5036_BNK_BRT, 0xff},
{LP5036_BNKA_CLR, 0x0f},
{LP5036_BNKB_CLR, 0x0f},
{LP5036_BNKC_CLR, 0x0f},
{LP5036_LED0_BRT, 0x0f},
/* LEDX_BRT registers are all 0xff for defaults */
{0x08, 0xff}, {0x09, 0xff}, {0x0a, 0xff}, {0x0b, 0xff}, {0x0c, 0xff},
{0x0d, 0xff}, {0x0e, 0xff}, {0x0f, 0xff}, {0x10, 0xff}, {0x11, 0xff},
{0x12, 0xff}, {0x13, 0xff},
{LP5036_OUT0_CLR, 0x0f},
/* OUTX_CLR registers are all 0x0 for defaults */
{0x15, 0x00}, {0x16, 0x00}, {0x17, 0x00}, {0x18, 0x00}, {0x19, 0x00},
{0x1a, 0x00}, {0x1b, 0x00}, {0x1c, 0x00}, {0x1d, 0x00}, {0x1e, 0x00},
{0x1f, 0x00}, {0x20, 0x00}, {0x21, 0x00}, {0x22, 0x00}, {0x23, 0x00},
{0x24, 0x00}, {0x25, 0x00}, {0x26, 0x00}, {0x27, 0x00}, {0x28, 0x00},
{0x29, 0x00}, {0x2a, 0x00}, {0x2b, 0x00}, {0x2c, 0x00}, {0x2d, 0x00},
{0x2e, 0x00}, {0x2f, 0x00}, {0x30, 0x00}, {0x31, 0x00}, {0x32, 0x00},
{0x33, 0x00}, {0x34, 0x00}, {0x35, 0x00}, {0x36, 0x00}, {0x37, 0x00},
{LP5036_RESET, 0x00}
};
static const struct regmap_config lp5012_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = LP5012_RESET,
.reg_defaults = lp5012_reg_defs,
.num_reg_defaults = ARRAY_SIZE(lp5012_reg_defs),
.cache_type = REGCACHE_FLAT,
};
static const struct regmap_config lp5024_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = LP5024_RESET,
.reg_defaults = lp5024_reg_defs,
.num_reg_defaults = ARRAY_SIZE(lp5024_reg_defs),
.cache_type = REGCACHE_FLAT,
};
static const struct regmap_config lp5036_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = LP5036_RESET,
.reg_defaults = lp5036_reg_defs,
.num_reg_defaults = ARRAY_SIZE(lp5036_reg_defs),
.cache_type = REGCACHE_FLAT,
};
enum lp50xx_model {
LP5009,
LP5012,
LP5018,
LP5024,
LP5030,
LP5036,
};
/**
* struct lp50xx_chip_info -
* @lp50xx_regmap_config: regmap register configuration
* @model_id: LED device model
* @max_modules: total number of supported LED modules
* @num_leds: number of LED outputs available on the device
* @led_brightness0_reg: first brightness register of the device
* @mix_out0_reg: first color mix register of the device
* @bank_brt_reg: bank brightness register
* @bank_mix_reg: color mix register
* @reset_reg: device reset register
*/
struct lp50xx_chip_info {
const struct regmap_config *lp50xx_regmap_config;
int model_id;
u8 max_modules;
u8 num_leds;
u8 led_brightness0_reg;
u8 mix_out0_reg;
u8 bank_brt_reg;
u8 bank_mix_reg;
u8 reset_reg;
};
static const struct lp50xx_chip_info lp50xx_chip_info_tbl[] = {
[LP5009] = {
.model_id = LP5009,
.max_modules = LP5009_MAX_LED_MODULES,
.num_leds = LP5009_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE,
.led_brightness0_reg = LP5012_LED0_BRT,
.mix_out0_reg = LP5012_OUT0_CLR,
.bank_brt_reg = LP5012_BNK_BRT,
.bank_mix_reg = LP5012_BNKA_CLR,
.reset_reg = LP5012_RESET,
.lp50xx_regmap_config = &lp5012_regmap_config,
},
[LP5012] = {
.model_id = LP5012,
.max_modules = LP5012_MAX_LED_MODULES,
.num_leds = LP5012_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE,
.led_brightness0_reg = LP5012_LED0_BRT,
.mix_out0_reg = LP5012_OUT0_CLR,
.bank_brt_reg = LP5012_BNK_BRT,
.bank_mix_reg = LP5012_BNKA_CLR,
.reset_reg = LP5012_RESET,
.lp50xx_regmap_config = &lp5012_regmap_config,
},
[LP5018] = {
.model_id = LP5018,
.max_modules = LP5018_MAX_LED_MODULES,
.num_leds = LP5018_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE,
.led_brightness0_reg = LP5024_LED0_BRT,
.mix_out0_reg = LP5024_OUT0_CLR,
.bank_brt_reg = LP5024_BNK_BRT,
.bank_mix_reg = LP5024_BNKA_CLR,
.reset_reg = LP5024_RESET,
.lp50xx_regmap_config = &lp5024_regmap_config,
},
[LP5024] = {
.model_id = LP5024,
.max_modules = LP5024_MAX_LED_MODULES,
.num_leds = LP5024_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE,
.led_brightness0_reg = LP5024_LED0_BRT,
.mix_out0_reg = LP5024_OUT0_CLR,
.bank_brt_reg = LP5024_BNK_BRT,
.bank_mix_reg = LP5024_BNKA_CLR,
.reset_reg = LP5024_RESET,
.lp50xx_regmap_config = &lp5024_regmap_config,
},
[LP5030] = {
.model_id = LP5030,
.max_modules = LP5030_MAX_LED_MODULES,
.num_leds = LP5030_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE,
.led_brightness0_reg = LP5036_LED0_BRT,
.mix_out0_reg = LP5036_OUT0_CLR,
.bank_brt_reg = LP5036_BNK_BRT,
.bank_mix_reg = LP5036_BNKA_CLR,
.reset_reg = LP5036_RESET,
.lp50xx_regmap_config = &lp5036_regmap_config,
},
[LP5036] = {
.model_id = LP5036,
.max_modules = LP5036_MAX_LED_MODULES,
.num_leds = LP5036_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE,
.led_brightness0_reg = LP5036_LED0_BRT,
.mix_out0_reg = LP5036_OUT0_CLR,
.bank_brt_reg = LP5036_BNK_BRT,
.bank_mix_reg = LP5036_BNKA_CLR,
.reset_reg = LP5036_RESET,
.lp50xx_regmap_config = &lp5036_regmap_config,
},
};
struct lp50xx_led {
struct led_classdev_mc mc_cdev;
struct lp50xx *priv;
unsigned long bank_modules;
u8 ctrl_bank_enabled;
int led_number;
};
/**
* struct lp50xx -
* @enable_gpio: hardware enable gpio
* @regulator: LED supply regulator pointer
* @client: pointer to the I2C client
* @regmap: device register map
* @dev: pointer to the devices device struct
* @lock: lock for reading/writing the device
* @chip_info: chip specific information (ie num_leds)
* @num_of_banked_leds: holds the number of banked LEDs
* @leds: array of LED strings
*/
struct lp50xx {
struct gpio_desc *enable_gpio;
struct regulator *regulator;
struct i2c_client *client;
struct regmap *regmap;
struct device *dev;
struct mutex lock;
const struct lp50xx_chip_info *chip_info;
int num_of_banked_leds;
/* This needs to be at the end of the struct */
struct lp50xx_led leds[];
};
static struct lp50xx_led *mcled_cdev_to_led(struct led_classdev_mc *mc_cdev)
{
return container_of(mc_cdev, struct lp50xx_led, mc_cdev);
}
static int lp50xx_brightness_set(struct led_classdev *cdev,
enum led_brightness brightness)
{
struct led_classdev_mc *mc_dev = lcdev_to_mccdev(cdev);
struct lp50xx_led *led = mcled_cdev_to_led(mc_dev);
const struct lp50xx_chip_info *led_chip = led->priv->chip_info;
u8 led_offset, reg_val;
int ret = 0;
int i;
mutex_lock(&led->priv->lock);
if (led->ctrl_bank_enabled)
reg_val = led_chip->bank_brt_reg;
else
reg_val = led_chip->led_brightness0_reg +
led->led_number;
ret = regmap_write(led->priv->regmap, reg_val, brightness);
if (ret) {
dev_err(led->priv->dev,
"Cannot write brightness value %d\n", ret);
goto out;
}
for (i = 0; i < led->mc_cdev.num_colors; i++) {
if (led->ctrl_bank_enabled) {
reg_val = led_chip->bank_mix_reg + i;
} else {
led_offset = (led->led_number * 3) + i;
reg_val = led_chip->mix_out0_reg + led_offset;
}
ret = regmap_write(led->priv->regmap, reg_val,
mc_dev->subled_info[i].intensity);
if (ret) {
dev_err(led->priv->dev,
"Cannot write intensity value %d\n", ret);
goto out;
}
}
out:
mutex_unlock(&led->priv->lock);
return ret;
}
static int lp50xx_set_banks(struct lp50xx *priv, u32 led_banks[])
{
u8 led_config_lo, led_config_hi;
u32 bank_enable_mask = 0;
int ret;
int i;
for (i = 0; i < priv->chip_info->max_modules; i++) {
if (led_banks[i])
bank_enable_mask |= (1 << led_banks[i]);
}
led_config_lo = bank_enable_mask;
led_config_hi = bank_enable_mask >> 8;
ret = regmap_write(priv->regmap, LP50XX_LED_CFG0, led_config_lo);
if (ret)
return ret;
if (priv->chip_info->model_id >= LP5030)
ret = regmap_write(priv->regmap, LP5036_LED_CFG1, led_config_hi);
return ret;
}
static int lp50xx_reset(struct lp50xx *priv)
{
return regmap_write(priv->regmap, priv->chip_info->reset_reg, LP50XX_SW_RESET);
}
static int lp50xx_enable_disable(struct lp50xx *priv, int enable_disable)
{
int ret;
ret = gpiod_direction_output(priv->enable_gpio, enable_disable);
if (ret)
return ret;
if (enable_disable)
return regmap_write(priv->regmap, LP50XX_DEV_CFG0, LP50XX_CHIP_EN);
else
return regmap_write(priv->regmap, LP50XX_DEV_CFG0, 0);
}
static int lp50xx_probe_leds(struct fwnode_handle *child, struct lp50xx *priv,
struct lp50xx_led *led, int num_leds)
{
u32 led_banks[LP5036_MAX_LED_MODULES] = {0};
int led_number;
int ret;
if (num_leds > 1) {
if (num_leds > priv->chip_info->max_modules) {
dev_err(priv->dev, "reg property is invalid\n");
return -EINVAL;
}
priv->num_of_banked_leds = num_leds;
ret = fwnode_property_read_u32_array(child, "reg", led_banks, num_leds);
if (ret) {
dev_err(priv->dev, "reg property is missing\n");
return ret;
}
ret = lp50xx_set_banks(priv, led_banks);
if (ret) {
dev_err(priv->dev, "Cannot setup banked LEDs\n");
return ret;
}
led->ctrl_bank_enabled = 1;
} else {
ret = fwnode_property_read_u32(child, "reg", &led_number);
if (ret) {
dev_err(priv->dev, "led reg property missing\n");
return ret;
}
if (led_number > priv->chip_info->num_leds) {
dev_err(priv->dev, "led-sources property is invalid\n");
return -EINVAL;
}
led->led_number = led_number;
}
return 0;
}
static int lp50xx_probe_dt(struct lp50xx *priv)
{
struct fwnode_handle *child = NULL;
struct fwnode_handle *led_node = NULL;
struct led_init_data init_data = {};
struct led_classdev *led_cdev;
struct mc_subled *mc_led_info;
struct lp50xx_led *led;
int ret = -EINVAL;
int num_colors;
u32 color_id;
int i = 0;
priv->enable_gpio = devm_gpiod_get_optional(priv->dev, "enable", GPIOD_OUT_LOW);
if (IS_ERR(priv->enable_gpio))
return dev_err_probe(priv->dev, PTR_ERR(priv->enable_gpio),
"Failed to get enable GPIO\n");
priv->regulator = devm_regulator_get(priv->dev, "vled");
if (IS_ERR(priv->regulator))
priv->regulator = NULL;
device_for_each_child_node(priv->dev, child) {
led = &priv->leds[i];
ret = fwnode_property_count_u32(child, "reg");
if (ret < 0) {
dev_err(priv->dev, "reg property is invalid\n");
goto child_out;
}
ret = lp50xx_probe_leds(child, priv, led, ret);
if (ret)
goto child_out;
init_data.fwnode = child;
num_colors = 0;
/*
* There are only 3 LEDs per module otherwise they should be
* banked which also is presented as 3 LEDs.
*/
mc_led_info = devm_kcalloc(priv->dev, LP50XX_LEDS_PER_MODULE,
sizeof(*mc_led_info), GFP_KERNEL);
if (!mc_led_info) {
ret = -ENOMEM;
goto child_out;
}
fwnode_for_each_child_node(child, led_node) {
ret = fwnode_property_read_u32(led_node, "color",
&color_id);
if (ret) {
fwnode_handle_put(led_node);
dev_err(priv->dev, "Cannot read color\n");
goto child_out;
}
mc_led_info[num_colors].color_index = color_id;
num_colors++;
}
led->priv = priv;
led->mc_cdev.num_colors = num_colors;
led->mc_cdev.subled_info = mc_led_info;
led_cdev = &led->mc_cdev.led_cdev;
led_cdev->brightness_set_blocking = lp50xx_brightness_set;
ret = devm_led_classdev_multicolor_register_ext(priv->dev,
&led->mc_cdev,
&init_data);
if (ret) {
dev_err(priv->dev, "led register err: %d\n", ret);
goto child_out;
}
i++;
}
return 0;
child_out:
fwnode_handle_put(child);
return ret;
}
static int lp50xx_probe(struct i2c_client *client)
{
struct lp50xx *led;
int count;
int ret;
count = device_get_child_node_count(&client->dev);
if (!count) {
dev_err(&client->dev, "LEDs are not defined in device tree!");
return -ENODEV;
}
led = devm_kzalloc(&client->dev, struct_size(led, leds, count),
GFP_KERNEL);
if (!led)
return -ENOMEM;
mutex_init(&led->lock);
led->client = client;
led->dev = &client->dev;
led->chip_info = device_get_match_data(&client->dev);
i2c_set_clientdata(client, led);
led->regmap = devm_regmap_init_i2c(client,
led->chip_info->lp50xx_regmap_config);
if (IS_ERR(led->regmap)) {
ret = PTR_ERR(led->regmap);
dev_err(&client->dev, "Failed to allocate register map: %d\n",
ret);
return ret;
}
ret = lp50xx_reset(led);
if (ret)
return ret;
ret = lp50xx_enable_disable(led, 1);
if (ret)
return ret;
return lp50xx_probe_dt(led);
}
static void lp50xx_remove(struct i2c_client *client)
{
struct lp50xx *led = i2c_get_clientdata(client);
int ret;
ret = lp50xx_enable_disable(led, 0);
if (ret)
dev_err(led->dev, "Failed to disable chip\n");
if (led->regulator) {
ret = regulator_disable(led->regulator);
if (ret)
dev_err(led->dev, "Failed to disable regulator\n");
}
mutex_destroy(&led->lock);
}
static const struct i2c_device_id lp50xx_id[] = {
{ "lp5009", (kernel_ulong_t)&lp50xx_chip_info_tbl[LP5009] },
{ "lp5012", (kernel_ulong_t)&lp50xx_chip_info_tbl[LP5012] },
{ "lp5018", (kernel_ulong_t)&lp50xx_chip_info_tbl[LP5018] },
{ "lp5024", (kernel_ulong_t)&lp50xx_chip_info_tbl[LP5024] },
{ "lp5030", (kernel_ulong_t)&lp50xx_chip_info_tbl[LP5030] },
{ "lp5036", (kernel_ulong_t)&lp50xx_chip_info_tbl[LP5036] },
{ }
};
MODULE_DEVICE_TABLE(i2c, lp50xx_id);
static const struct of_device_id of_lp50xx_leds_match[] = {
{ .compatible = "ti,lp5009", .data = &lp50xx_chip_info_tbl[LP5009] },
{ .compatible = "ti,lp5012", .data = &lp50xx_chip_info_tbl[LP5012] },
{ .compatible = "ti,lp5018", .data = &lp50xx_chip_info_tbl[LP5018] },
{ .compatible = "ti,lp5024", .data = &lp50xx_chip_info_tbl[LP5024] },
{ .compatible = "ti,lp5030", .data = &lp50xx_chip_info_tbl[LP5030] },
{ .compatible = "ti,lp5036", .data = &lp50xx_chip_info_tbl[LP5036] },
{}
};
MODULE_DEVICE_TABLE(of, of_lp50xx_leds_match);
static struct i2c_driver lp50xx_driver = {
.driver = {
.name = "lp50xx",
.of_match_table = of_lp50xx_leds_match,
},
.probe = lp50xx_probe,
.remove = lp50xx_remove,
.id_table = lp50xx_id,
};
module_i2c_driver(lp50xx_driver);
MODULE_DESCRIPTION("Texas Instruments LP50XX LED driver");
MODULE_AUTHOR("Dan Murphy <[email protected]>");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/leds-lp50xx.c |
/*
* drivers/leds/leds-mlxcpld.c
* Copyright (c) 2016 Mellanox Technologies. All rights reserved.
* Copyright (c) 2016 Vadim Pasternak <[email protected]>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the names of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <linux/acpi.h>
#include <linux/device.h>
#include <linux/dmi.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/io.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#define MLXPLAT_CPLD_LPC_REG_BASE_ADRR 0x2500 /* LPC bus access */
/* Color codes for LEDs */
#define MLXCPLD_LED_OFFSET_HALF 0x01 /* Offset from solid: 3Hz blink */
#define MLXCPLD_LED_OFFSET_FULL 0x02 /* Offset from solid: 6Hz blink */
#define MLXCPLD_LED_IS_OFF 0x00 /* Off */
#define MLXCPLD_LED_RED_STATIC_ON 0x05 /* Solid red */
#define MLXCPLD_LED_RED_BLINK_HALF (MLXCPLD_LED_RED_STATIC_ON + \
MLXCPLD_LED_OFFSET_HALF)
#define MLXCPLD_LED_RED_BLINK_FULL (MLXCPLD_LED_RED_STATIC_ON + \
MLXCPLD_LED_OFFSET_FULL)
#define MLXCPLD_LED_GREEN_STATIC_ON 0x0D /* Solid green */
#define MLXCPLD_LED_GREEN_BLINK_HALF (MLXCPLD_LED_GREEN_STATIC_ON + \
MLXCPLD_LED_OFFSET_HALF)
#define MLXCPLD_LED_GREEN_BLINK_FULL (MLXCPLD_LED_GREEN_STATIC_ON + \
MLXCPLD_LED_OFFSET_FULL)
#define MLXCPLD_LED_BLINK_3HZ 167 /* ~167 msec off/on */
#define MLXCPLD_LED_BLINK_6HZ 83 /* ~83 msec off/on */
/**
* struct mlxcpld_param - LED access parameters:
* @offset: offset for LED access in CPLD device
* @mask: mask for LED access in CPLD device
* @base_color: base color code for LED
**/
struct mlxcpld_param {
u8 offset;
u8 mask;
u8 base_color;
};
/**
* struct mlxcpld_led_priv - LED private data:
* @cled: LED class device instance
* @param: LED CPLD access parameters
**/
struct mlxcpld_led_priv {
struct led_classdev cdev;
struct mlxcpld_param param;
};
#define cdev_to_priv(c) container_of(c, struct mlxcpld_led_priv, cdev)
/**
* struct mlxcpld_led_profile - system LED profile (defined per system class):
* @offset: offset for LED access in CPLD device
* @mask: mask for LED access in CPLD device
* @base_color: base color code
* @brightness: default brightness setting (on/off)
* @name: LED name
**/
struct mlxcpld_led_profile {
u8 offset;
u8 mask;
u8 base_color;
enum led_brightness brightness;
const char *name;
};
/**
* struct mlxcpld_led_pdata - system LED private data
* @pdev: platform device pointer
* @pled: LED class device instance
* @profile: system configuration profile
* @num_led_instances: number of LED instances
* @lock: device access lock
**/
struct mlxcpld_led_pdata {
struct platform_device *pdev;
struct mlxcpld_led_priv *pled;
struct mlxcpld_led_profile *profile;
int num_led_instances;
spinlock_t lock;
};
static struct mlxcpld_led_pdata *mlxcpld_led;
/* Default profile fit the next Mellanox systems:
* "msx6710", "msx6720", "msb7700", "msn2700", "msx1410",
* "msn2410", "msb7800", "msn2740"
*/
static struct mlxcpld_led_profile mlxcpld_led_default_profile[] = {
{
0x21, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, 1,
"mlxcpld:fan1:green",
},
{
0x21, 0xf0, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
"mlxcpld:fan1:red",
},
{
0x21, 0x0f, MLXCPLD_LED_GREEN_STATIC_ON, 1,
"mlxcpld:fan2:green",
},
{
0x21, 0x0f, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
"mlxcpld:fan2:red",
},
{
0x22, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, 1,
"mlxcpld:fan3:green",
},
{
0x22, 0xf0, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
"mlxcpld:fan3:red",
},
{
0x22, 0x0f, MLXCPLD_LED_GREEN_STATIC_ON, 1,
"mlxcpld:fan4:green",
},
{
0x22, 0x0f, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
"mlxcpld:fan4:red",
},
{
0x20, 0x0f, MLXCPLD_LED_GREEN_STATIC_ON, 1,
"mlxcpld:psu:green",
},
{
0x20, 0x0f, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
"mlxcpld:psu:red",
},
{
0x20, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, 1,
"mlxcpld:status:green",
},
{
0x20, 0xf0, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
"mlxcpld:status:red",
},
};
/* Profile fit the Mellanox systems based on "msn2100" */
static struct mlxcpld_led_profile mlxcpld_led_msn2100_profile[] = {
{
0x21, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, 1,
"mlxcpld:fan:green",
},
{
0x21, 0xf0, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
"mlxcpld:fan:red",
},
{
0x23, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, 1,
"mlxcpld:psu1:green",
},
{
0x23, 0xf0, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
"mlxcpld:psu1:red",
},
{
0x23, 0x0f, MLXCPLD_LED_GREEN_STATIC_ON, 1,
"mlxcpld:psu2:green",
},
{
0x23, 0x0f, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
"mlxcpld:psu2:red",
},
{
0x20, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, 1,
"mlxcpld:status:green",
},
{
0x20, 0xf0, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
"mlxcpld:status:red",
},
{
0x24, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, LED_OFF,
"mlxcpld:uid:blue",
},
};
enum mlxcpld_led_platform_types {
MLXCPLD_LED_PLATFORM_DEFAULT,
MLXCPLD_LED_PLATFORM_MSN2100,
};
static const char *mlx_product_names[] = {
"DEFAULT",
"MSN2100",
};
static enum
mlxcpld_led_platform_types mlxcpld_led_platform_check_sys_type(void)
{
const char *mlx_product_name;
int i;
mlx_product_name = dmi_get_system_info(DMI_PRODUCT_NAME);
if (!mlx_product_name)
return MLXCPLD_LED_PLATFORM_DEFAULT;
for (i = 1; i < ARRAY_SIZE(mlx_product_names); i++) {
if (strstr(mlx_product_name, mlx_product_names[i]))
return i;
}
return MLXCPLD_LED_PLATFORM_DEFAULT;
}
static void mlxcpld_led_bus_access_func(u16 base, u8 offset, u8 rw_flag,
u8 *data)
{
u32 addr = base + offset;
if (rw_flag == 0)
outb(*data, addr);
else
*data = inb(addr);
}
static void mlxcpld_led_store_hw(u8 mask, u8 off, u8 vset)
{
u8 nib, val;
/*
* Each LED is controlled through low or high nibble of the relevant
* CPLD register. Register offset is specified by off parameter.
* Parameter vset provides color code: 0x0 for off, 0x5 for solid red,
* 0x6 for 3Hz blink red, 0xd for solid green, 0xe for 3Hz blink
* green.
* Parameter mask specifies which nibble is used for specific LED: mask
* 0xf0 - lower nibble is to be used (bits from 0 to 3), mask 0x0f -
* higher nibble (bits from 4 to 7).
*/
spin_lock(&mlxcpld_led->lock);
mlxcpld_led_bus_access_func(MLXPLAT_CPLD_LPC_REG_BASE_ADRR, off, 1,
&val);
nib = (mask == 0xf0) ? vset : (vset << 4);
val = (val & mask) | nib;
mlxcpld_led_bus_access_func(MLXPLAT_CPLD_LPC_REG_BASE_ADRR, off, 0,
&val);
spin_unlock(&mlxcpld_led->lock);
}
static void mlxcpld_led_brightness_set(struct led_classdev *led,
enum led_brightness value)
{
struct mlxcpld_led_priv *pled = cdev_to_priv(led);
if (value) {
mlxcpld_led_store_hw(pled->param.mask, pled->param.offset,
pled->param.base_color);
return;
}
mlxcpld_led_store_hw(pled->param.mask, pled->param.offset,
MLXCPLD_LED_IS_OFF);
}
static int mlxcpld_led_blink_set(struct led_classdev *led,
unsigned long *delay_on,
unsigned long *delay_off)
{
struct mlxcpld_led_priv *pled = cdev_to_priv(led);
/*
* HW supports two types of blinking: full (6Hz) and half (3Hz).
* For delay on/off zero default setting 3Hz is used.
*/
if (!(*delay_on == 0 && *delay_off == 0) &&
!(*delay_on == MLXCPLD_LED_BLINK_3HZ &&
*delay_off == MLXCPLD_LED_BLINK_3HZ) &&
!(*delay_on == MLXCPLD_LED_BLINK_6HZ &&
*delay_off == MLXCPLD_LED_BLINK_6HZ))
return -EINVAL;
if (*delay_on == MLXCPLD_LED_BLINK_6HZ)
mlxcpld_led_store_hw(pled->param.mask, pled->param.offset,
pled->param.base_color +
MLXCPLD_LED_OFFSET_FULL);
else
mlxcpld_led_store_hw(pled->param.mask, pled->param.offset,
pled->param.base_color +
MLXCPLD_LED_OFFSET_HALF);
return 0;
}
static int mlxcpld_led_config(struct device *dev,
struct mlxcpld_led_pdata *cpld)
{
int i;
int err;
cpld->pled = devm_kcalloc(dev,
cpld->num_led_instances,
sizeof(struct mlxcpld_led_priv),
GFP_KERNEL);
if (!cpld->pled)
return -ENOMEM;
for (i = 0; i < cpld->num_led_instances; i++) {
cpld->pled[i].cdev.name = cpld->profile[i].name;
cpld->pled[i].cdev.brightness = cpld->profile[i].brightness;
cpld->pled[i].cdev.max_brightness = 1;
cpld->pled[i].cdev.brightness_set = mlxcpld_led_brightness_set;
cpld->pled[i].cdev.blink_set = mlxcpld_led_blink_set;
cpld->pled[i].cdev.flags = LED_CORE_SUSPENDRESUME;
err = devm_led_classdev_register(dev, &cpld->pled[i].cdev);
if (err)
return err;
cpld->pled[i].param.offset = mlxcpld_led->profile[i].offset;
cpld->pled[i].param.mask = mlxcpld_led->profile[i].mask;
cpld->pled[i].param.base_color =
mlxcpld_led->profile[i].base_color;
if (mlxcpld_led->profile[i].brightness)
mlxcpld_led_brightness_set(&cpld->pled[i].cdev,
mlxcpld_led->profile[i].brightness);
}
return 0;
}
static int __init mlxcpld_led_probe(struct platform_device *pdev)
{
enum mlxcpld_led_platform_types mlxcpld_led_plat =
mlxcpld_led_platform_check_sys_type();
mlxcpld_led = devm_kzalloc(&pdev->dev, sizeof(*mlxcpld_led),
GFP_KERNEL);
if (!mlxcpld_led)
return -ENOMEM;
mlxcpld_led->pdev = pdev;
switch (mlxcpld_led_plat) {
case MLXCPLD_LED_PLATFORM_MSN2100:
mlxcpld_led->profile = mlxcpld_led_msn2100_profile;
mlxcpld_led->num_led_instances =
ARRAY_SIZE(mlxcpld_led_msn2100_profile);
break;
default:
mlxcpld_led->profile = mlxcpld_led_default_profile;
mlxcpld_led->num_led_instances =
ARRAY_SIZE(mlxcpld_led_default_profile);
break;
}
spin_lock_init(&mlxcpld_led->lock);
return mlxcpld_led_config(&pdev->dev, mlxcpld_led);
}
static struct platform_driver mlxcpld_led_driver = {
.driver = {
.name = KBUILD_MODNAME,
},
};
static int __init mlxcpld_led_init(void)
{
struct platform_device *pdev;
int err;
if (!dmi_match(DMI_CHASSIS_VENDOR, "Mellanox Technologies Ltd."))
return -ENODEV;
pdev = platform_device_register_simple(KBUILD_MODNAME, -1, NULL, 0);
if (IS_ERR(pdev)) {
pr_err("Device allocation failed\n");
return PTR_ERR(pdev);
}
err = platform_driver_probe(&mlxcpld_led_driver, mlxcpld_led_probe);
if (err) {
pr_err("Probe platform driver failed\n");
platform_device_unregister(pdev);
}
return err;
}
static void __exit mlxcpld_led_exit(void)
{
platform_device_unregister(mlxcpld_led->pdev);
platform_driver_unregister(&mlxcpld_led_driver);
}
module_init(mlxcpld_led_init);
module_exit(mlxcpld_led_exit);
MODULE_AUTHOR("Vadim Pasternak <[email protected]>");
MODULE_DESCRIPTION("Mellanox board LED driver");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_ALIAS("platform:leds_mlxcpld");
| linux-master | drivers/leds/leds-mlxcpld.c |
// SPDX-License-Identifier: GPL-2.0-only
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/err.h>
#include <linux/leds.h>
#include <linux/io.h>
#include <linux/dmi.h>
#include <linux/i8042.h>
#define CLEVO_MAIL_LED_OFF 0x0084
#define CLEVO_MAIL_LED_BLINK_1HZ 0x008A
#define CLEVO_MAIL_LED_BLINK_0_5HZ 0x0083
MODULE_AUTHOR("Márton Németh <[email protected]>");
MODULE_DESCRIPTION("Clevo mail LED driver");
MODULE_LICENSE("GPL");
static bool nodetect;
module_param_named(nodetect, nodetect, bool, 0);
MODULE_PARM_DESC(nodetect, "Skip DMI hardware detection");
static struct platform_device *pdev;
static int __init clevo_mail_led_dmi_callback(const struct dmi_system_id *id)
{
pr_info("'%s' found\n", id->ident);
return 1;
}
/*
* struct clevo_mail_led_dmi_table - List of known good models
*
* Contains the known good models this driver is compatible with.
* When adding a new model try to be as strict as possible. This
* makes it possible to keep the false positives (the model is
* detected as working, but in reality it is not) as low as
* possible.
*/
static const struct dmi_system_id clevo_mail_led_dmi_table[] __initconst = {
{
.callback = clevo_mail_led_dmi_callback,
.ident = "Clevo D410J",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "VIA"),
DMI_MATCH(DMI_PRODUCT_NAME, "K8N800"),
DMI_MATCH(DMI_PRODUCT_VERSION, "VT8204B")
}
},
{
.callback = clevo_mail_led_dmi_callback,
.ident = "Clevo M5x0N",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "CLEVO Co."),
DMI_MATCH(DMI_PRODUCT_NAME, "M5x0N")
}
},
{
.callback = clevo_mail_led_dmi_callback,
.ident = "Clevo M5x0V",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "CLEVO Co. "),
DMI_MATCH(DMI_BOARD_NAME, "M5X0V "),
DMI_MATCH(DMI_PRODUCT_VERSION, "VT6198")
}
},
{
.callback = clevo_mail_led_dmi_callback,
.ident = "Clevo D400P",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "Clevo"),
DMI_MATCH(DMI_BOARD_NAME, "D400P"),
DMI_MATCH(DMI_BOARD_VERSION, "Rev.A"),
DMI_MATCH(DMI_PRODUCT_VERSION, "0106")
}
},
{
.callback = clevo_mail_led_dmi_callback,
.ident = "Clevo D410V",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "Clevo, Co."),
DMI_MATCH(DMI_BOARD_NAME, "D400V/D470V"),
DMI_MATCH(DMI_BOARD_VERSION, "SS78B"),
DMI_MATCH(DMI_PRODUCT_VERSION, "Rev. A1")
}
},
{ }
};
MODULE_DEVICE_TABLE(dmi, clevo_mail_led_dmi_table);
static void clevo_mail_led_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
i8042_lock_chip();
if (value == LED_OFF)
i8042_command(NULL, CLEVO_MAIL_LED_OFF);
else if (value <= LED_HALF)
i8042_command(NULL, CLEVO_MAIL_LED_BLINK_0_5HZ);
else
i8042_command(NULL, CLEVO_MAIL_LED_BLINK_1HZ);
i8042_unlock_chip();
}
static int clevo_mail_led_blink(struct led_classdev *led_cdev,
unsigned long *delay_on,
unsigned long *delay_off)
{
int status = -EINVAL;
i8042_lock_chip();
if (*delay_on == 0 /* ms */ && *delay_off == 0 /* ms */) {
/* Special case: the leds subsystem requested us to
* chose one user friendly blinking of the LED, and
* start it. Let's blink the led slowly (0.5Hz).
*/
*delay_on = 1000; /* ms */
*delay_off = 1000; /* ms */
i8042_command(NULL, CLEVO_MAIL_LED_BLINK_0_5HZ);
status = 0;
} else if (*delay_on == 500 /* ms */ && *delay_off == 500 /* ms */) {
/* blink the led with 1Hz */
i8042_command(NULL, CLEVO_MAIL_LED_BLINK_1HZ);
status = 0;
} else if (*delay_on == 1000 /* ms */ && *delay_off == 1000 /* ms */) {
/* blink the led with 0.5Hz */
i8042_command(NULL, CLEVO_MAIL_LED_BLINK_0_5HZ);
status = 0;
} else {
pr_debug("clevo_mail_led_blink(..., %lu, %lu),"
" returning -EINVAL (unsupported)\n",
*delay_on, *delay_off);
}
i8042_unlock_chip();
return status;
}
static struct led_classdev clevo_mail_led = {
.name = "clevo::mail",
.brightness_set = clevo_mail_led_set,
.blink_set = clevo_mail_led_blink,
.flags = LED_CORE_SUSPENDRESUME,
};
static int __init clevo_mail_led_probe(struct platform_device *pdev)
{
return led_classdev_register(&pdev->dev, &clevo_mail_led);
}
static int clevo_mail_led_remove(struct platform_device *pdev)
{
led_classdev_unregister(&clevo_mail_led);
return 0;
}
static struct platform_driver clevo_mail_led_driver = {
.remove = clevo_mail_led_remove,
.driver = {
.name = KBUILD_MODNAME,
},
};
static int __init clevo_mail_led_init(void)
{
int error = 0;
int count = 0;
/* Check with the help of DMI if we are running on supported hardware */
if (!nodetect) {
count = dmi_check_system(clevo_mail_led_dmi_table);
} else {
count = 1;
pr_err("Skipping DMI detection. "
"If the driver works on your hardware please "
"report model and the output of dmidecode in tracker "
"at http://sourceforge.net/projects/clevo-mailled/\n");
}
if (!count)
return -ENODEV;
pdev = platform_device_register_simple(KBUILD_MODNAME, -1, NULL, 0);
if (!IS_ERR(pdev)) {
error = platform_driver_probe(&clevo_mail_led_driver,
clevo_mail_led_probe);
if (error) {
pr_err("Can't probe platform driver\n");
platform_device_unregister(pdev);
}
} else
error = PTR_ERR(pdev);
return error;
}
static void __exit clevo_mail_led_exit(void)
{
platform_device_unregister(pdev);
platform_driver_unregister(&clevo_mail_led_driver);
clevo_mail_led_set(NULL, LED_OFF);
}
module_init(clevo_mail_led_init);
module_exit(clevo_mail_led_exit);
| linux-master | drivers/leds/leds-clevo-mail.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* LED driver for Marvell 88PM860x
*
* Copyright (C) 2009 Marvell International Ltd.
* Haojian Zhuang <[email protected]>
*/
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/leds.h>
#include <linux/slab.h>
#include <linux/mfd/88pm860x.h>
#include <linux/module.h>
#define LED_PWM_MASK (0x1F)
#define LED_CURRENT_MASK (0x07 << 5)
#define LED_BLINK_MASK (0x7F)
#define LED_ON_CONTINUOUS (0x0F << 3)
#define LED1_BLINK_EN (1 << 1)
#define LED2_BLINK_EN (1 << 2)
struct pm860x_led {
struct led_classdev cdev;
struct i2c_client *i2c;
struct pm860x_chip *chip;
struct mutex lock;
char name[MFD_NAME_SIZE];
int port;
int iset;
unsigned char brightness;
unsigned char current_brightness;
int reg_control;
int reg_blink;
int blink_mask;
};
static int led_power_set(struct pm860x_chip *chip, int port, int on)
{
int ret = -EINVAL;
switch (port) {
case 0:
case 1:
case 2:
ret = on ? pm8606_osc_enable(chip, RGB1_ENABLE) :
pm8606_osc_disable(chip, RGB1_ENABLE);
break;
case 3:
case 4:
case 5:
ret = on ? pm8606_osc_enable(chip, RGB2_ENABLE) :
pm8606_osc_disable(chip, RGB2_ENABLE);
break;
}
return ret;
}
static int pm860x_led_set(struct led_classdev *cdev,
enum led_brightness value)
{
struct pm860x_led *led = container_of(cdev, struct pm860x_led, cdev);
struct pm860x_chip *chip;
unsigned char buf[3];
int ret;
chip = led->chip;
mutex_lock(&led->lock);
led->brightness = value >> 3;
if ((led->current_brightness == 0) && led->brightness) {
led_power_set(chip, led->port, 1);
if (led->iset) {
pm860x_set_bits(led->i2c, led->reg_control,
LED_CURRENT_MASK, led->iset);
}
pm860x_set_bits(led->i2c, led->reg_blink,
LED_BLINK_MASK, LED_ON_CONTINUOUS);
pm860x_set_bits(led->i2c, PM8606_WLED3B, led->blink_mask,
led->blink_mask);
}
pm860x_set_bits(led->i2c, led->reg_control, LED_PWM_MASK,
led->brightness);
if (led->brightness == 0) {
pm860x_bulk_read(led->i2c, led->reg_control, 3, buf);
ret = buf[0] & LED_PWM_MASK;
ret |= buf[1] & LED_PWM_MASK;
ret |= buf[2] & LED_PWM_MASK;
if (ret == 0) {
/* unset current since no led is lighting */
pm860x_set_bits(led->i2c, led->reg_control,
LED_CURRENT_MASK, 0);
pm860x_set_bits(led->i2c, PM8606_WLED3B,
led->blink_mask, 0);
led_power_set(chip, led->port, 0);
}
}
led->current_brightness = led->brightness;
dev_dbg(chip->dev, "Update LED. (reg:%d, brightness:%d)\n",
led->reg_control, led->brightness);
mutex_unlock(&led->lock);
return 0;
}
#ifdef CONFIG_OF
static int pm860x_led_dt_init(struct platform_device *pdev,
struct pm860x_led *data)
{
struct device_node *nproot, *np;
int iset = 0;
if (!dev_of_node(pdev->dev.parent))
return -ENODEV;
nproot = of_get_child_by_name(dev_of_node(pdev->dev.parent), "leds");
if (!nproot) {
dev_err(&pdev->dev, "failed to find leds node\n");
return -ENODEV;
}
for_each_available_child_of_node(nproot, np) {
if (of_node_name_eq(np, data->name)) {
of_property_read_u32(np, "marvell,88pm860x-iset",
&iset);
data->iset = PM8606_LED_CURRENT(iset);
of_node_put(np);
break;
}
}
of_node_put(nproot);
return 0;
}
#else
#define pm860x_led_dt_init(x, y) (-1)
#endif
static int pm860x_led_probe(struct platform_device *pdev)
{
struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
struct pm860x_led_pdata *pdata = dev_get_platdata(&pdev->dev);
struct pm860x_led *data;
struct resource *res;
int ret = 0;
data = devm_kzalloc(&pdev->dev, sizeof(struct pm860x_led), GFP_KERNEL);
if (data == NULL)
return -ENOMEM;
res = platform_get_resource_byname(pdev, IORESOURCE_REG, "control");
if (!res) {
dev_err(&pdev->dev, "No REG resource for control\n");
return -ENXIO;
}
data->reg_control = res->start;
res = platform_get_resource_byname(pdev, IORESOURCE_REG, "blink");
if (!res) {
dev_err(&pdev->dev, "No REG resource for blink\n");
return -ENXIO;
}
data->reg_blink = res->start;
memset(data->name, 0, MFD_NAME_SIZE);
switch (pdev->id) {
case 0:
data->blink_mask = LED1_BLINK_EN;
sprintf(data->name, "led0-red");
break;
case 1:
data->blink_mask = LED1_BLINK_EN;
sprintf(data->name, "led0-green");
break;
case 2:
data->blink_mask = LED1_BLINK_EN;
sprintf(data->name, "led0-blue");
break;
case 3:
data->blink_mask = LED2_BLINK_EN;
sprintf(data->name, "led1-red");
break;
case 4:
data->blink_mask = LED2_BLINK_EN;
sprintf(data->name, "led1-green");
break;
case 5:
data->blink_mask = LED2_BLINK_EN;
sprintf(data->name, "led1-blue");
break;
}
data->chip = chip;
data->i2c = (chip->id == CHIP_PM8606) ? chip->client : chip->companion;
data->port = pdev->id;
if (pm860x_led_dt_init(pdev, data))
if (pdata)
data->iset = pdata->iset;
data->current_brightness = 0;
data->cdev.name = data->name;
data->cdev.brightness_set_blocking = pm860x_led_set;
mutex_init(&data->lock);
ret = led_classdev_register(chip->dev, &data->cdev);
if (ret < 0) {
dev_err(&pdev->dev, "Failed to register LED: %d\n", ret);
return ret;
}
pm860x_led_set(&data->cdev, 0);
platform_set_drvdata(pdev, data);
return 0;
}
static int pm860x_led_remove(struct platform_device *pdev)
{
struct pm860x_led *data = platform_get_drvdata(pdev);
led_classdev_unregister(&data->cdev);
return 0;
}
static struct platform_driver pm860x_led_driver = {
.driver = {
.name = "88pm860x-led",
},
.probe = pm860x_led_probe,
.remove = pm860x_led_remove,
};
module_platform_driver(pm860x_led_driver);
MODULE_DESCRIPTION("LED driver for Marvell PM860x");
MODULE_AUTHOR("Haojian Zhuang <[email protected]>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:88pm860x-led");
| linux-master | drivers/leds/leds-88pm860x.c |
// SPDX-License-Identifier: GPL-2.0
/*
* LED Driver for SGI Octane machines
*/
#include <asm/io.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/leds.h>
#define IP30_LED_SYSTEM 0
#define IP30_LED_FAULT 1
struct ip30_led {
struct led_classdev cdev;
u32 __iomem *reg;
};
static void ip30led_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
struct ip30_led *led = container_of(led_cdev, struct ip30_led, cdev);
writel(value, led->reg);
}
static int ip30led_create(struct platform_device *pdev, int num)
{
struct ip30_led *data;
data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->reg = devm_platform_ioremap_resource(pdev, num);
if (IS_ERR(data->reg))
return PTR_ERR(data->reg);
switch (num) {
case IP30_LED_SYSTEM:
data->cdev.name = "white:power";
break;
case IP30_LED_FAULT:
data->cdev.name = "red:fault";
break;
default:
return -EINVAL;
}
data->cdev.brightness = readl(data->reg);
data->cdev.max_brightness = 1;
data->cdev.brightness_set = ip30led_set;
return devm_led_classdev_register(&pdev->dev, &data->cdev);
}
static int ip30led_probe(struct platform_device *pdev)
{
int ret;
ret = ip30led_create(pdev, IP30_LED_SYSTEM);
if (ret < 0)
return ret;
return ip30led_create(pdev, IP30_LED_FAULT);
}
static struct platform_driver ip30led_driver = {
.probe = ip30led_probe,
.driver = {
.name = "ip30-leds",
},
};
module_platform_driver(ip30led_driver);
MODULE_AUTHOR("Thomas Bogendoerfer <[email protected]>");
MODULE_DESCRIPTION("SGI Octane LED driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:ip30-leds");
| linux-master | drivers/leds/leds-ip30.c |
// SPDX-License-Identifier: GPL-2.0+
// Driver for Awinic AW2013 3-channel LED driver
#include <linux/i2c.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/regulator/consumer.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/regmap.h>
#define AW2013_MAX_LEDS 3
/* Reset and ID register */
#define AW2013_RSTR 0x00
#define AW2013_RSTR_RESET 0x55
#define AW2013_RSTR_CHIP_ID 0x33
/* Global control register */
#define AW2013_GCR 0x01
#define AW2013_GCR_ENABLE BIT(0)
/* LED channel enable register */
#define AW2013_LCTR 0x30
#define AW2013_LCTR_LE(x) BIT((x))
/* LED channel control registers */
#define AW2013_LCFG(x) (0x31 + (x))
#define AW2013_LCFG_IMAX_MASK (BIT(0) | BIT(1)) // Should be 0-3
#define AW2013_LCFG_MD BIT(4)
#define AW2013_LCFG_FI BIT(5)
#define AW2013_LCFG_FO BIT(6)
/* LED channel PWM registers */
#define AW2013_REG_PWM(x) (0x34 + (x))
/* LED channel timing registers */
#define AW2013_LEDT0(x) (0x37 + (x) * 3)
#define AW2013_LEDT0_T1(x) ((x) << 4) // Should be 0-7
#define AW2013_LEDT0_T2(x) (x) // Should be 0-5
#define AW2013_LEDT1(x) (0x38 + (x) * 3)
#define AW2013_LEDT1_T3(x) ((x) << 4) // Should be 0-7
#define AW2013_LEDT1_T4(x) (x) // Should be 0-7
#define AW2013_LEDT2(x) (0x39 + (x) * 3)
#define AW2013_LEDT2_T0(x) ((x) << 4) // Should be 0-8
#define AW2013_LEDT2_REPEAT(x) (x) // Should be 0-15
#define AW2013_REG_MAX 0x77
#define AW2013_TIME_STEP 130 /* ms */
struct aw2013;
struct aw2013_led {
struct aw2013 *chip;
struct led_classdev cdev;
u32 num;
unsigned int imax;
};
struct aw2013 {
struct mutex mutex; /* held when writing to registers */
struct regulator_bulk_data regulators[2];
struct i2c_client *client;
struct aw2013_led leds[AW2013_MAX_LEDS];
struct regmap *regmap;
int num_leds;
bool enabled;
};
static int aw2013_chip_init(struct aw2013 *chip)
{
int i, ret;
ret = regmap_write(chip->regmap, AW2013_GCR, AW2013_GCR_ENABLE);
if (ret) {
dev_err(&chip->client->dev, "Failed to enable the chip: %d\n",
ret);
return ret;
}
for (i = 0; i < chip->num_leds; i++) {
ret = regmap_update_bits(chip->regmap,
AW2013_LCFG(chip->leds[i].num),
AW2013_LCFG_IMAX_MASK,
chip->leds[i].imax);
if (ret) {
dev_err(&chip->client->dev,
"Failed to set maximum current for led %d: %d\n",
chip->leds[i].num, ret);
return ret;
}
}
return ret;
}
static void aw2013_chip_disable(struct aw2013 *chip)
{
int ret;
if (!chip->enabled)
return;
regmap_write(chip->regmap, AW2013_GCR, 0);
ret = regulator_bulk_disable(ARRAY_SIZE(chip->regulators),
chip->regulators);
if (ret) {
dev_err(&chip->client->dev,
"Failed to disable regulators: %d\n", ret);
return;
}
chip->enabled = false;
}
static int aw2013_chip_enable(struct aw2013 *chip)
{
int ret;
if (chip->enabled)
return 0;
ret = regulator_bulk_enable(ARRAY_SIZE(chip->regulators),
chip->regulators);
if (ret) {
dev_err(&chip->client->dev,
"Failed to enable regulators: %d\n", ret);
return ret;
}
chip->enabled = true;
ret = aw2013_chip_init(chip);
if (ret)
aw2013_chip_disable(chip);
return ret;
}
static bool aw2013_chip_in_use(struct aw2013 *chip)
{
int i;
for (i = 0; i < chip->num_leds; i++)
if (chip->leds[i].cdev.brightness)
return true;
return false;
}
static int aw2013_brightness_set(struct led_classdev *cdev,
enum led_brightness brightness)
{
struct aw2013_led *led = container_of(cdev, struct aw2013_led, cdev);
int ret, num;
mutex_lock(&led->chip->mutex);
if (aw2013_chip_in_use(led->chip)) {
ret = aw2013_chip_enable(led->chip);
if (ret)
goto error;
}
num = led->num;
ret = regmap_write(led->chip->regmap, AW2013_REG_PWM(num), brightness);
if (ret)
goto error;
if (brightness) {
ret = regmap_update_bits(led->chip->regmap, AW2013_LCTR,
AW2013_LCTR_LE(num), 0xFF);
} else {
ret = regmap_update_bits(led->chip->regmap, AW2013_LCTR,
AW2013_LCTR_LE(num), 0);
if (ret)
goto error;
ret = regmap_update_bits(led->chip->regmap, AW2013_LCFG(num),
AW2013_LCFG_MD, 0);
}
if (ret)
goto error;
if (!aw2013_chip_in_use(led->chip))
aw2013_chip_disable(led->chip);
error:
mutex_unlock(&led->chip->mutex);
return ret;
}
static int aw2013_blink_set(struct led_classdev *cdev,
unsigned long *delay_on, unsigned long *delay_off)
{
struct aw2013_led *led = container_of(cdev, struct aw2013_led, cdev);
int ret, num = led->num;
unsigned long off = 0, on = 0;
/* If no blink specified, default to 1 Hz. */
if (!*delay_off && !*delay_on) {
*delay_off = 500;
*delay_on = 500;
}
if (!led->cdev.brightness) {
led->cdev.brightness = LED_FULL;
ret = aw2013_brightness_set(&led->cdev, led->cdev.brightness);
if (ret)
return ret;
}
/* Never on - just set to off */
if (!*delay_on) {
led->cdev.brightness = LED_OFF;
return aw2013_brightness_set(&led->cdev, LED_OFF);
}
mutex_lock(&led->chip->mutex);
/* Never off - brightness is already set, disable blinking */
if (!*delay_off) {
ret = regmap_update_bits(led->chip->regmap, AW2013_LCFG(num),
AW2013_LCFG_MD, 0);
goto out;
}
/* Convert into values the HW will understand. */
off = min(5, ilog2((*delay_off - 1) / AW2013_TIME_STEP) + 1);
on = min(7, ilog2((*delay_on - 1) / AW2013_TIME_STEP) + 1);
*delay_off = BIT(off) * AW2013_TIME_STEP;
*delay_on = BIT(on) * AW2013_TIME_STEP;
/* Set timings */
ret = regmap_write(led->chip->regmap,
AW2013_LEDT0(num), AW2013_LEDT0_T2(on));
if (ret)
goto out;
ret = regmap_write(led->chip->regmap,
AW2013_LEDT1(num), AW2013_LEDT1_T4(off));
if (ret)
goto out;
/* Finally, enable the LED */
ret = regmap_update_bits(led->chip->regmap, AW2013_LCFG(num),
AW2013_LCFG_MD, 0xFF);
if (ret)
goto out;
ret = regmap_update_bits(led->chip->regmap, AW2013_LCTR,
AW2013_LCTR_LE(num), 0xFF);
out:
mutex_unlock(&led->chip->mutex);
return ret;
}
static int aw2013_probe_dt(struct aw2013 *chip)
{
struct device_node *np = dev_of_node(&chip->client->dev), *child;
int count, ret = 0, i = 0;
struct aw2013_led *led;
count = of_get_available_child_count(np);
if (!count || count > AW2013_MAX_LEDS)
return -EINVAL;
regmap_write(chip->regmap, AW2013_RSTR, AW2013_RSTR_RESET);
for_each_available_child_of_node(np, child) {
struct led_init_data init_data = {};
u32 source;
u32 imax;
ret = of_property_read_u32(child, "reg", &source);
if (ret != 0 || source >= AW2013_MAX_LEDS) {
dev_err(&chip->client->dev,
"Couldn't read LED address: %d\n", ret);
count--;
continue;
}
led = &chip->leds[i];
led->num = source;
led->chip = chip;
init_data.fwnode = of_fwnode_handle(child);
if (!of_property_read_u32(child, "led-max-microamp", &imax)) {
led->imax = min_t(u32, imax / 5000, 3);
} else {
led->imax = 1; // 5mA
dev_info(&chip->client->dev,
"DT property led-max-microamp is missing\n");
}
led->cdev.brightness_set_blocking = aw2013_brightness_set;
led->cdev.blink_set = aw2013_blink_set;
ret = devm_led_classdev_register_ext(&chip->client->dev,
&led->cdev, &init_data);
if (ret < 0) {
of_node_put(child);
return ret;
}
i++;
}
if (!count)
return -EINVAL;
chip->num_leds = i;
return 0;
}
static const struct regmap_config aw2013_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = AW2013_REG_MAX,
};
static int aw2013_probe(struct i2c_client *client)
{
struct aw2013 *chip;
int ret;
unsigned int chipid;
chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
if (!chip)
return -ENOMEM;
mutex_init(&chip->mutex);
mutex_lock(&chip->mutex);
chip->client = client;
i2c_set_clientdata(client, chip);
chip->regmap = devm_regmap_init_i2c(client, &aw2013_regmap_config);
if (IS_ERR(chip->regmap)) {
ret = PTR_ERR(chip->regmap);
dev_err(&client->dev, "Failed to allocate register map: %d\n",
ret);
goto error;
}
chip->regulators[0].supply = "vcc";
chip->regulators[1].supply = "vio";
ret = devm_regulator_bulk_get(&client->dev,
ARRAY_SIZE(chip->regulators),
chip->regulators);
if (ret < 0) {
if (ret != -EPROBE_DEFER)
dev_err(&client->dev,
"Failed to request regulators: %d\n", ret);
goto error;
}
ret = regulator_bulk_enable(ARRAY_SIZE(chip->regulators),
chip->regulators);
if (ret) {
dev_err(&client->dev,
"Failed to enable regulators: %d\n", ret);
goto error;
}
ret = regmap_read(chip->regmap, AW2013_RSTR, &chipid);
if (ret) {
dev_err(&client->dev, "Failed to read chip ID: %d\n",
ret);
goto error_reg;
}
if (chipid != AW2013_RSTR_CHIP_ID) {
dev_err(&client->dev, "Chip reported wrong ID: %x\n",
chipid);
ret = -ENODEV;
goto error_reg;
}
ret = aw2013_probe_dt(chip);
if (ret < 0)
goto error_reg;
ret = regulator_bulk_disable(ARRAY_SIZE(chip->regulators),
chip->regulators);
if (ret) {
dev_err(&client->dev,
"Failed to disable regulators: %d\n", ret);
goto error;
}
mutex_unlock(&chip->mutex);
return 0;
error_reg:
regulator_bulk_disable(ARRAY_SIZE(chip->regulators),
chip->regulators);
error:
mutex_destroy(&chip->mutex);
return ret;
}
static void aw2013_remove(struct i2c_client *client)
{
struct aw2013 *chip = i2c_get_clientdata(client);
aw2013_chip_disable(chip);
mutex_destroy(&chip->mutex);
}
static const struct of_device_id aw2013_match_table[] = {
{ .compatible = "awinic,aw2013", },
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, aw2013_match_table);
static struct i2c_driver aw2013_driver = {
.driver = {
.name = "leds-aw2013",
.of_match_table = aw2013_match_table,
},
.probe = aw2013_probe,
.remove = aw2013_remove,
};
module_i2c_driver(aw2013_driver);
MODULE_AUTHOR("Nikita Travkin <[email protected]>");
MODULE_DESCRIPTION("AW2013 LED driver");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/leds-aw2013.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* LP5521/LP5523/LP55231/LP5562 Common Driver
*
* Copyright 2012 Texas Instruments
*
* Author: Milo(Woogyom) Kim <[email protected]>
*
* Derived from leds-lp5521.c, leds-lp5523.c
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/i2c.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/platform_data/leds-lp55xx.h>
#include <linux/slab.h>
#include <linux/gpio/consumer.h>
#include <dt-bindings/leds/leds-lp55xx.h>
#include "leds-lp55xx-common.h"
/* External clock rate */
#define LP55XX_CLK_32K 32768
static struct lp55xx_led *cdev_to_lp55xx_led(struct led_classdev *cdev)
{
return container_of(cdev, struct lp55xx_led, cdev);
}
static struct lp55xx_led *dev_to_lp55xx_led(struct device *dev)
{
return cdev_to_lp55xx_led(dev_get_drvdata(dev));
}
static struct lp55xx_led *mcled_cdev_to_led(struct led_classdev_mc *mc_cdev)
{
return container_of(mc_cdev, struct lp55xx_led, mc_cdev);
}
static void lp55xx_reset_device(struct lp55xx_chip *chip)
{
struct lp55xx_device_config *cfg = chip->cfg;
u8 addr = cfg->reset.addr;
u8 val = cfg->reset.val;
/* no error checking here because no ACK from the device after reset */
lp55xx_write(chip, addr, val);
}
static int lp55xx_detect_device(struct lp55xx_chip *chip)
{
struct lp55xx_device_config *cfg = chip->cfg;
u8 addr = cfg->enable.addr;
u8 val = cfg->enable.val;
int ret;
ret = lp55xx_write(chip, addr, val);
if (ret)
return ret;
usleep_range(1000, 2000);
ret = lp55xx_read(chip, addr, &val);
if (ret)
return ret;
if (val != cfg->enable.val)
return -ENODEV;
return 0;
}
static int lp55xx_post_init_device(struct lp55xx_chip *chip)
{
struct lp55xx_device_config *cfg = chip->cfg;
if (!cfg->post_init_device)
return 0;
return cfg->post_init_device(chip);
}
static ssize_t led_current_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct lp55xx_led *led = dev_to_lp55xx_led(dev);
return sysfs_emit(buf, "%d\n", led->led_current);
}
static ssize_t led_current_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t len)
{
struct lp55xx_led *led = dev_to_lp55xx_led(dev);
struct lp55xx_chip *chip = led->chip;
unsigned long curr;
if (kstrtoul(buf, 0, &curr))
return -EINVAL;
if (curr > led->max_current)
return -EINVAL;
if (!chip->cfg->set_led_current)
return len;
mutex_lock(&chip->lock);
chip->cfg->set_led_current(led, (u8)curr);
mutex_unlock(&chip->lock);
return len;
}
static ssize_t max_current_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct lp55xx_led *led = dev_to_lp55xx_led(dev);
return sysfs_emit(buf, "%d\n", led->max_current);
}
static DEVICE_ATTR_RW(led_current);
static DEVICE_ATTR_RO(max_current);
static struct attribute *lp55xx_led_attrs[] = {
&dev_attr_led_current.attr,
&dev_attr_max_current.attr,
NULL,
};
ATTRIBUTE_GROUPS(lp55xx_led);
static int lp55xx_set_mc_brightness(struct led_classdev *cdev,
enum led_brightness brightness)
{
struct led_classdev_mc *mc_dev = lcdev_to_mccdev(cdev);
struct lp55xx_led *led = mcled_cdev_to_led(mc_dev);
struct lp55xx_device_config *cfg = led->chip->cfg;
led_mc_calc_color_components(&led->mc_cdev, brightness);
return cfg->multicolor_brightness_fn(led);
}
static int lp55xx_set_brightness(struct led_classdev *cdev,
enum led_brightness brightness)
{
struct lp55xx_led *led = cdev_to_lp55xx_led(cdev);
struct lp55xx_device_config *cfg = led->chip->cfg;
led->brightness = (u8)brightness;
return cfg->brightness_fn(led);
}
static int lp55xx_init_led(struct lp55xx_led *led,
struct lp55xx_chip *chip, int chan)
{
struct lp55xx_platform_data *pdata = chip->pdata;
struct lp55xx_device_config *cfg = chip->cfg;
struct device *dev = &chip->cl->dev;
int max_channel = cfg->max_channel;
struct mc_subled *mc_led_info;
struct led_classdev *led_cdev;
char name[32];
int i;
int ret;
if (chan >= max_channel) {
dev_err(dev, "invalid channel: %d / %d\n", chan, max_channel);
return -EINVAL;
}
if (pdata->led_config[chan].led_current == 0)
return 0;
if (pdata->led_config[chan].name) {
led->cdev.name = pdata->led_config[chan].name;
} else {
snprintf(name, sizeof(name), "%s:channel%d",
pdata->label ? : chip->cl->name, chan);
led->cdev.name = name;
}
if (pdata->led_config[chan].num_colors > 1) {
mc_led_info = devm_kcalloc(dev,
pdata->led_config[chan].num_colors,
sizeof(*mc_led_info), GFP_KERNEL);
if (!mc_led_info)
return -ENOMEM;
led_cdev = &led->mc_cdev.led_cdev;
led_cdev->name = led->cdev.name;
led_cdev->brightness_set_blocking = lp55xx_set_mc_brightness;
led->mc_cdev.num_colors = pdata->led_config[chan].num_colors;
for (i = 0; i < led->mc_cdev.num_colors; i++) {
mc_led_info[i].color_index =
pdata->led_config[chan].color_id[i];
mc_led_info[i].channel =
pdata->led_config[chan].output_num[i];
}
led->mc_cdev.subled_info = mc_led_info;
} else {
led->cdev.brightness_set_blocking = lp55xx_set_brightness;
}
led->cdev.groups = lp55xx_led_groups;
led->cdev.default_trigger = pdata->led_config[chan].default_trigger;
led->led_current = pdata->led_config[chan].led_current;
led->max_current = pdata->led_config[chan].max_current;
led->chan_nr = pdata->led_config[chan].chan_nr;
if (led->chan_nr >= max_channel) {
dev_err(dev, "Use channel numbers between 0 and %d\n",
max_channel - 1);
return -EINVAL;
}
if (pdata->led_config[chan].num_colors > 1)
ret = devm_led_classdev_multicolor_register(dev, &led->mc_cdev);
else
ret = devm_led_classdev_register(dev, &led->cdev);
if (ret) {
dev_err(dev, "led register err: %d\n", ret);
return ret;
}
return 0;
}
static void lp55xx_firmware_loaded(const struct firmware *fw, void *context)
{
struct lp55xx_chip *chip = context;
struct device *dev = &chip->cl->dev;
enum lp55xx_engine_index idx = chip->engine_idx;
if (!fw) {
dev_err(dev, "firmware request failed\n");
return;
}
/* handling firmware data is chip dependent */
mutex_lock(&chip->lock);
chip->engines[idx - 1].mode = LP55XX_ENGINE_LOAD;
chip->fw = fw;
if (chip->cfg->firmware_cb)
chip->cfg->firmware_cb(chip);
mutex_unlock(&chip->lock);
/* firmware should be released for other channel use */
release_firmware(chip->fw);
chip->fw = NULL;
}
static int lp55xx_request_firmware(struct lp55xx_chip *chip)
{
const char *name = chip->cl->name;
struct device *dev = &chip->cl->dev;
return request_firmware_nowait(THIS_MODULE, false, name, dev,
GFP_KERNEL, chip, lp55xx_firmware_loaded);
}
static ssize_t select_engine_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
struct lp55xx_chip *chip = led->chip;
return sprintf(buf, "%d\n", chip->engine_idx);
}
static ssize_t select_engine_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t len)
{
struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
struct lp55xx_chip *chip = led->chip;
unsigned long val;
int ret;
if (kstrtoul(buf, 0, &val))
return -EINVAL;
/* select the engine to be run */
switch (val) {
case LP55XX_ENGINE_1:
case LP55XX_ENGINE_2:
case LP55XX_ENGINE_3:
mutex_lock(&chip->lock);
chip->engine_idx = val;
ret = lp55xx_request_firmware(chip);
mutex_unlock(&chip->lock);
break;
default:
dev_err(dev, "%lu: invalid engine index. (1, 2, 3)\n", val);
return -EINVAL;
}
if (ret) {
dev_err(dev, "request firmware err: %d\n", ret);
return ret;
}
return len;
}
static inline void lp55xx_run_engine(struct lp55xx_chip *chip, bool start)
{
if (chip->cfg->run_engine)
chip->cfg->run_engine(chip, start);
}
static ssize_t run_engine_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t len)
{
struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
struct lp55xx_chip *chip = led->chip;
unsigned long val;
if (kstrtoul(buf, 0, &val))
return -EINVAL;
/* run or stop the selected engine */
if (val <= 0) {
lp55xx_run_engine(chip, false);
return len;
}
mutex_lock(&chip->lock);
lp55xx_run_engine(chip, true);
mutex_unlock(&chip->lock);
return len;
}
static DEVICE_ATTR_RW(select_engine);
static DEVICE_ATTR_WO(run_engine);
static struct attribute *lp55xx_engine_attributes[] = {
&dev_attr_select_engine.attr,
&dev_attr_run_engine.attr,
NULL,
};
static const struct attribute_group lp55xx_engine_attr_group = {
.attrs = lp55xx_engine_attributes,
};
int lp55xx_write(struct lp55xx_chip *chip, u8 reg, u8 val)
{
return i2c_smbus_write_byte_data(chip->cl, reg, val);
}
EXPORT_SYMBOL_GPL(lp55xx_write);
int lp55xx_read(struct lp55xx_chip *chip, u8 reg, u8 *val)
{
s32 ret;
ret = i2c_smbus_read_byte_data(chip->cl, reg);
if (ret < 0)
return ret;
*val = ret;
return 0;
}
EXPORT_SYMBOL_GPL(lp55xx_read);
int lp55xx_update_bits(struct lp55xx_chip *chip, u8 reg, u8 mask, u8 val)
{
int ret;
u8 tmp;
ret = lp55xx_read(chip, reg, &tmp);
if (ret)
return ret;
tmp &= ~mask;
tmp |= val & mask;
return lp55xx_write(chip, reg, tmp);
}
EXPORT_SYMBOL_GPL(lp55xx_update_bits);
bool lp55xx_is_extclk_used(struct lp55xx_chip *chip)
{
struct clk *clk;
int err;
clk = devm_clk_get(&chip->cl->dev, "32k_clk");
if (IS_ERR(clk))
goto use_internal_clk;
err = clk_prepare_enable(clk);
if (err)
goto use_internal_clk;
if (clk_get_rate(clk) != LP55XX_CLK_32K) {
clk_disable_unprepare(clk);
goto use_internal_clk;
}
dev_info(&chip->cl->dev, "%dHz external clock used\n", LP55XX_CLK_32K);
chip->clk = clk;
return true;
use_internal_clk:
dev_info(&chip->cl->dev, "internal clock used\n");
return false;
}
EXPORT_SYMBOL_GPL(lp55xx_is_extclk_used);
int lp55xx_init_device(struct lp55xx_chip *chip)
{
struct lp55xx_platform_data *pdata;
struct lp55xx_device_config *cfg;
struct device *dev = &chip->cl->dev;
int ret = 0;
WARN_ON(!chip);
pdata = chip->pdata;
cfg = chip->cfg;
if (!pdata || !cfg)
return -EINVAL;
if (pdata->enable_gpiod) {
gpiod_direction_output(pdata->enable_gpiod, 0);
gpiod_set_consumer_name(pdata->enable_gpiod, "LP55xx enable");
gpiod_set_value(pdata->enable_gpiod, 0);
usleep_range(1000, 2000); /* Keep enable down at least 1ms */
gpiod_set_value(pdata->enable_gpiod, 1);
usleep_range(1000, 2000); /* 500us abs min. */
}
lp55xx_reset_device(chip);
/*
* Exact value is not available. 10 - 20ms
* appears to be enough for reset.
*/
usleep_range(10000, 20000);
ret = lp55xx_detect_device(chip);
if (ret) {
dev_err(dev, "device detection err: %d\n", ret);
goto err;
}
/* chip specific initialization */
ret = lp55xx_post_init_device(chip);
if (ret) {
dev_err(dev, "post init device err: %d\n", ret);
goto err_post_init;
}
return 0;
err_post_init:
lp55xx_deinit_device(chip);
err:
return ret;
}
EXPORT_SYMBOL_GPL(lp55xx_init_device);
void lp55xx_deinit_device(struct lp55xx_chip *chip)
{
struct lp55xx_platform_data *pdata = chip->pdata;
if (chip->clk)
clk_disable_unprepare(chip->clk);
if (pdata->enable_gpiod)
gpiod_set_value(pdata->enable_gpiod, 0);
}
EXPORT_SYMBOL_GPL(lp55xx_deinit_device);
int lp55xx_register_leds(struct lp55xx_led *led, struct lp55xx_chip *chip)
{
struct lp55xx_platform_data *pdata = chip->pdata;
struct lp55xx_device_config *cfg = chip->cfg;
int num_channels = pdata->num_channels;
struct lp55xx_led *each;
u8 led_current;
int ret;
int i;
if (!cfg->brightness_fn) {
dev_err(&chip->cl->dev, "empty brightness configuration\n");
return -EINVAL;
}
for (i = 0; i < num_channels; i++) {
/* do not initialize channels that are not connected */
if (pdata->led_config[i].led_current == 0)
continue;
led_current = pdata->led_config[i].led_current;
each = led + i;
ret = lp55xx_init_led(each, chip, i);
if (ret)
goto err_init_led;
chip->num_leds++;
each->chip = chip;
/* setting led current at each channel */
if (cfg->set_led_current)
cfg->set_led_current(each, led_current);
}
return 0;
err_init_led:
return ret;
}
EXPORT_SYMBOL_GPL(lp55xx_register_leds);
int lp55xx_register_sysfs(struct lp55xx_chip *chip)
{
struct device *dev = &chip->cl->dev;
struct lp55xx_device_config *cfg = chip->cfg;
int ret;
if (!cfg->run_engine || !cfg->firmware_cb)
goto dev_specific_attrs;
ret = sysfs_create_group(&dev->kobj, &lp55xx_engine_attr_group);
if (ret)
return ret;
dev_specific_attrs:
return cfg->dev_attr_group ?
sysfs_create_group(&dev->kobj, cfg->dev_attr_group) : 0;
}
EXPORT_SYMBOL_GPL(lp55xx_register_sysfs);
void lp55xx_unregister_sysfs(struct lp55xx_chip *chip)
{
struct device *dev = &chip->cl->dev;
struct lp55xx_device_config *cfg = chip->cfg;
if (cfg->dev_attr_group)
sysfs_remove_group(&dev->kobj, cfg->dev_attr_group);
sysfs_remove_group(&dev->kobj, &lp55xx_engine_attr_group);
}
EXPORT_SYMBOL_GPL(lp55xx_unregister_sysfs);
static int lp55xx_parse_common_child(struct device_node *np,
struct lp55xx_led_config *cfg,
int led_number, int *chan_nr)
{
int ret;
of_property_read_string(np, "chan-name",
&cfg[led_number].name);
of_property_read_u8(np, "led-cur",
&cfg[led_number].led_current);
of_property_read_u8(np, "max-cur",
&cfg[led_number].max_current);
ret = of_property_read_u32(np, "reg", chan_nr);
if (ret)
return ret;
if (*chan_nr < 0 || *chan_nr > cfg->max_channel)
return -EINVAL;
return 0;
}
static int lp55xx_parse_multi_led_child(struct device_node *child,
struct lp55xx_led_config *cfg,
int child_number, int color_number)
{
int chan_nr, color_id, ret;
ret = lp55xx_parse_common_child(child, cfg, child_number, &chan_nr);
if (ret)
return ret;
ret = of_property_read_u32(child, "color", &color_id);
if (ret)
return ret;
cfg[child_number].color_id[color_number] = color_id;
cfg[child_number].output_num[color_number] = chan_nr;
return 0;
}
static int lp55xx_parse_multi_led(struct device_node *np,
struct lp55xx_led_config *cfg,
int child_number)
{
struct device_node *child;
int num_colors = 0, ret;
for_each_available_child_of_node(np, child) {
ret = lp55xx_parse_multi_led_child(child, cfg, child_number,
num_colors);
if (ret) {
of_node_put(child);
return ret;
}
num_colors++;
}
cfg[child_number].num_colors = num_colors;
return 0;
}
static int lp55xx_parse_logical_led(struct device_node *np,
struct lp55xx_led_config *cfg,
int child_number)
{
int led_color, ret;
int chan_nr = 0;
cfg[child_number].default_trigger =
of_get_property(np, "linux,default-trigger", NULL);
ret = of_property_read_u32(np, "color", &led_color);
if (ret)
return ret;
if (led_color == LED_COLOR_ID_RGB)
return lp55xx_parse_multi_led(np, cfg, child_number);
ret = lp55xx_parse_common_child(np, cfg, child_number, &chan_nr);
if (ret < 0)
return ret;
cfg[child_number].chan_nr = chan_nr;
return ret;
}
struct lp55xx_platform_data *lp55xx_of_populate_pdata(struct device *dev,
struct device_node *np,
struct lp55xx_chip *chip)
{
struct device_node *child;
struct lp55xx_platform_data *pdata;
struct lp55xx_led_config *cfg;
int num_channels;
int i = 0;
int ret;
pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return ERR_PTR(-ENOMEM);
num_channels = of_get_available_child_count(np);
if (num_channels == 0) {
dev_err(dev, "no LED channels\n");
return ERR_PTR(-EINVAL);
}
cfg = devm_kcalloc(dev, num_channels, sizeof(*cfg), GFP_KERNEL);
if (!cfg)
return ERR_PTR(-ENOMEM);
pdata->led_config = &cfg[0];
pdata->num_channels = num_channels;
cfg->max_channel = chip->cfg->max_channel;
for_each_available_child_of_node(np, child) {
ret = lp55xx_parse_logical_led(child, cfg, i);
if (ret) {
of_node_put(child);
return ERR_PTR(-EINVAL);
}
i++;
}
if (of_property_read_u32(np, "ti,charge-pump-mode", &pdata->charge_pump_mode))
pdata->charge_pump_mode = LP55XX_CP_AUTO;
if (pdata->charge_pump_mode > LP55XX_CP_AUTO) {
dev_err(dev, "invalid charge pump mode %d\n", pdata->charge_pump_mode);
return ERR_PTR(-EINVAL);
}
of_property_read_string(np, "label", &pdata->label);
of_property_read_u8(np, "clock-mode", &pdata->clock_mode);
pdata->enable_gpiod = devm_gpiod_get_optional(dev, "enable",
GPIOD_ASIS);
if (IS_ERR(pdata->enable_gpiod))
return ERR_CAST(pdata->enable_gpiod);
/* LP8501 specific */
of_property_read_u8(np, "pwr-sel", (u8 *)&pdata->pwr_sel);
return pdata;
}
EXPORT_SYMBOL_GPL(lp55xx_of_populate_pdata);
MODULE_AUTHOR("Milo Kim <[email protected]>");
MODULE_DESCRIPTION("LP55xx Common Driver");
MODULE_LICENSE("GPL");
| linux-master | drivers/leds/leds-lp55xx-common.c |
// SPDX-License-Identifier: GPL-2.0
/*
* CZ.NIC's Turris Omnia LEDs driver
*
* 2020 by Marek Behún <[email protected]>
*/
#include <linux/i2c.h>
#include <linux/led-class-multicolor.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include "leds.h"
#define OMNIA_BOARD_LEDS 12
#define OMNIA_LED_NUM_CHANNELS 3
#define CMD_LED_MODE 3
#define CMD_LED_MODE_LED(l) ((l) & 0x0f)
#define CMD_LED_MODE_USER 0x10
#define CMD_LED_STATE 4
#define CMD_LED_STATE_LED(l) ((l) & 0x0f)
#define CMD_LED_STATE_ON 0x10
#define CMD_LED_COLOR 5
#define CMD_LED_SET_BRIGHTNESS 7
#define CMD_LED_GET_BRIGHTNESS 8
struct omnia_led {
struct led_classdev_mc mc_cdev;
struct mc_subled subled_info[OMNIA_LED_NUM_CHANNELS];
int reg;
};
#define to_omnia_led(l) container_of(l, struct omnia_led, mc_cdev)
struct omnia_leds {
struct i2c_client *client;
struct mutex lock;
struct omnia_led leds[];
};
static int omnia_led_brightness_set_blocking(struct led_classdev *cdev,
enum led_brightness brightness)
{
struct led_classdev_mc *mc_cdev = lcdev_to_mccdev(cdev);
struct omnia_leds *leds = dev_get_drvdata(cdev->dev->parent);
struct omnia_led *led = to_omnia_led(mc_cdev);
u8 buf[5], state;
int ret;
mutex_lock(&leds->lock);
led_mc_calc_color_components(&led->mc_cdev, brightness);
buf[0] = CMD_LED_COLOR;
buf[1] = led->reg;
buf[2] = mc_cdev->subled_info[0].brightness;
buf[3] = mc_cdev->subled_info[1].brightness;
buf[4] = mc_cdev->subled_info[2].brightness;
state = CMD_LED_STATE_LED(led->reg);
if (buf[2] || buf[3] || buf[4])
state |= CMD_LED_STATE_ON;
ret = i2c_smbus_write_byte_data(leds->client, CMD_LED_STATE, state);
if (ret >= 0 && (state & CMD_LED_STATE_ON))
ret = i2c_master_send(leds->client, buf, 5);
mutex_unlock(&leds->lock);
return ret;
}
static int omnia_led_register(struct i2c_client *client, struct omnia_led *led,
struct device_node *np)
{
struct led_init_data init_data = {};
struct device *dev = &client->dev;
struct led_classdev *cdev;
int ret, color;
ret = of_property_read_u32(np, "reg", &led->reg);
if (ret || led->reg >= OMNIA_BOARD_LEDS) {
dev_warn(dev,
"Node %pOF: must contain 'reg' property with values between 0 and %i\n",
np, OMNIA_BOARD_LEDS - 1);
return 0;
}
ret = of_property_read_u32(np, "color", &color);
if (ret || color != LED_COLOR_ID_RGB) {
dev_warn(dev,
"Node %pOF: must contain 'color' property with value LED_COLOR_ID_RGB\n",
np);
return 0;
}
led->subled_info[0].color_index = LED_COLOR_ID_RED;
led->subled_info[0].channel = 0;
led->subled_info[1].color_index = LED_COLOR_ID_GREEN;
led->subled_info[1].channel = 1;
led->subled_info[2].color_index = LED_COLOR_ID_BLUE;
led->subled_info[2].channel = 2;
led->mc_cdev.subled_info = led->subled_info;
led->mc_cdev.num_colors = OMNIA_LED_NUM_CHANNELS;
init_data.fwnode = &np->fwnode;
cdev = &led->mc_cdev.led_cdev;
cdev->max_brightness = 255;
cdev->brightness_set_blocking = omnia_led_brightness_set_blocking;
/* put the LED into software mode */
ret = i2c_smbus_write_byte_data(client, CMD_LED_MODE,
CMD_LED_MODE_LED(led->reg) |
CMD_LED_MODE_USER);
if (ret < 0) {
dev_err(dev, "Cannot set LED %pOF to software mode: %i\n", np,
ret);
return ret;
}
/* disable the LED */
ret = i2c_smbus_write_byte_data(client, CMD_LED_STATE,
CMD_LED_STATE_LED(led->reg));
if (ret < 0) {
dev_err(dev, "Cannot set LED %pOF brightness: %i\n", np, ret);
return ret;
}
ret = devm_led_classdev_multicolor_register_ext(dev, &led->mc_cdev,
&init_data);
if (ret < 0) {
dev_err(dev, "Cannot register LED %pOF: %i\n", np, ret);
return ret;
}
return 1;
}
/*
* On the front panel of the Turris Omnia router there is also a button which
* can be used to control the intensity of all the LEDs at once, so that if they
* are too bright, user can dim them.
* The microcontroller cycles between 8 levels of this global brightness (from
* 100% to 0%), but this setting can have any integer value between 0 and 100.
* It is therefore convenient to be able to change this setting from software.
* We expose this setting via a sysfs attribute file called "brightness". This
* file lives in the device directory of the LED controller, not an individual
* LED, so it should not confuse users.
*/
static ssize_t brightness_show(struct device *dev, struct device_attribute *a,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
int ret;
ret = i2c_smbus_read_byte_data(client, CMD_LED_GET_BRIGHTNESS);
if (ret < 0)
return ret;
return sysfs_emit(buf, "%d\n", ret);
}
static ssize_t brightness_store(struct device *dev, struct device_attribute *a,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
unsigned long brightness;
int ret;
if (kstrtoul(buf, 10, &brightness))
return -EINVAL;
if (brightness > 100)
return -EINVAL;
ret = i2c_smbus_write_byte_data(client, CMD_LED_SET_BRIGHTNESS,
(u8)brightness);
return ret < 0 ? ret : count;
}
static DEVICE_ATTR_RW(brightness);
static struct attribute *omnia_led_controller_attrs[] = {
&dev_attr_brightness.attr,
NULL,
};
ATTRIBUTE_GROUPS(omnia_led_controller);
static int omnia_leds_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct device_node *np = dev_of_node(dev), *child;
struct omnia_leds *leds;
struct omnia_led *led;
int ret, count;
count = of_get_available_child_count(np);
if (!count) {
dev_err(dev, "LEDs are not defined in device tree!\n");
return -ENODEV;
} else if (count > OMNIA_BOARD_LEDS) {
dev_err(dev, "Too many LEDs defined in device tree!\n");
return -EINVAL;
}
leds = devm_kzalloc(dev, struct_size(leds, leds, count), GFP_KERNEL);
if (!leds)
return -ENOMEM;
leds->client = client;
i2c_set_clientdata(client, leds);
mutex_init(&leds->lock);
led = &leds->leds[0];
for_each_available_child_of_node(np, child) {
ret = omnia_led_register(client, led, child);
if (ret < 0) {
of_node_put(child);
return ret;
}
led += ret;
}
return 0;
}
static void omnia_leds_remove(struct i2c_client *client)
{
u8 buf[5];
/* put all LEDs into default (HW triggered) mode */
i2c_smbus_write_byte_data(client, CMD_LED_MODE,
CMD_LED_MODE_LED(OMNIA_BOARD_LEDS));
/* set all LEDs color to [255, 255, 255] */
buf[0] = CMD_LED_COLOR;
buf[1] = OMNIA_BOARD_LEDS;
buf[2] = 255;
buf[3] = 255;
buf[4] = 255;
i2c_master_send(client, buf, 5);
}
static const struct of_device_id of_omnia_leds_match[] = {
{ .compatible = "cznic,turris-omnia-leds", },
{},
};
static const struct i2c_device_id omnia_id[] = {
{ "omnia", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, omnia_id);
static struct i2c_driver omnia_leds_driver = {
.probe = omnia_leds_probe,
.remove = omnia_leds_remove,
.id_table = omnia_id,
.driver = {
.name = "leds-turris-omnia",
.of_match_table = of_omnia_leds_match,
.dev_groups = omnia_led_controller_groups,
},
};
module_i2c_driver(omnia_leds_driver);
MODULE_AUTHOR("Marek Behun <[email protected]>");
MODULE_DESCRIPTION("CZ.NIC's Turris Omnia LEDs");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/leds-turris-omnia.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2021 Rafał Miłecki <[email protected]>
*/
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/pinctrl/consumer.h>
#include <linux/platform_device.h>
#include <linux/spinlock.h>
#define BCM63138_MAX_LEDS 32
#define BCM63138_MAX_BRIGHTNESS 9
#define BCM63138_LED_BITS 4 /* how many bits control a single LED */
#define BCM63138_LED_MASK ((1 << BCM63138_LED_BITS) - 1) /* 0xf */
#define BCM63138_LEDS_PER_REG (32 / BCM63138_LED_BITS) /* 8 */
#define BCM63138_GLB_CTRL 0x00
#define BCM63138_GLB_CTRL_SERIAL_LED_DATA_PPOL 0x00000002
#define BCM63138_GLB_CTRL_SERIAL_LED_EN_POL 0x00000008
#define BCM63138_MASK 0x04
#define BCM63138_HW_LED_EN 0x08
#define BCM63138_SERIAL_LED_SHIFT_SEL 0x0c
#define BCM63138_FLASH_RATE_CTRL1 0x10
#define BCM63138_FLASH_RATE_CTRL2 0x14
#define BCM63138_FLASH_RATE_CTRL3 0x18
#define BCM63138_FLASH_RATE_CTRL4 0x1c
#define BCM63138_BRIGHT_CTRL1 0x20
#define BCM63138_BRIGHT_CTRL2 0x24
#define BCM63138_BRIGHT_CTRL3 0x28
#define BCM63138_BRIGHT_CTRL4 0x2c
#define BCM63138_POWER_LED_CFG 0x30
#define BCM63138_HW_POLARITY 0xb4
#define BCM63138_SW_DATA 0xb8
#define BCM63138_SW_POLARITY 0xbc
#define BCM63138_PARALLEL_LED_POLARITY 0xc0
#define BCM63138_SERIAL_LED_POLARITY 0xc4
#define BCM63138_HW_LED_STATUS 0xc8
#define BCM63138_FLASH_CTRL_STATUS 0xcc
#define BCM63138_FLASH_BRT_CTRL 0xd0
#define BCM63138_FLASH_P_LED_OUT_STATUS 0xd4
#define BCM63138_FLASH_S_LED_OUT_STATUS 0xd8
struct bcm63138_leds {
struct device *dev;
void __iomem *base;
spinlock_t lock;
};
struct bcm63138_led {
struct bcm63138_leds *leds;
struct led_classdev cdev;
u32 pin;
bool active_low;
};
/*
* I/O access
*/
static void bcm63138_leds_write(struct bcm63138_leds *leds, unsigned int reg,
u32 data)
{
writel(data, leds->base + reg);
}
static unsigned long bcm63138_leds_read(struct bcm63138_leds *leds,
unsigned int reg)
{
return readl(leds->base + reg);
}
static void bcm63138_leds_update_bits(struct bcm63138_leds *leds,
unsigned int reg, u32 mask, u32 val)
{
WARN_ON(val & ~mask);
bcm63138_leds_write(leds, reg, (bcm63138_leds_read(leds, reg) & ~mask) | (val & mask));
}
/*
* Helpers
*/
static void bcm63138_leds_set_flash_rate(struct bcm63138_leds *leds,
struct bcm63138_led *led,
u8 value)
{
int reg_offset = (led->pin >> fls((BCM63138_LEDS_PER_REG - 1))) * 4;
int shift = (led->pin & (BCM63138_LEDS_PER_REG - 1)) * BCM63138_LED_BITS;
bcm63138_leds_update_bits(leds, BCM63138_FLASH_RATE_CTRL1 + reg_offset,
BCM63138_LED_MASK << shift, value << shift);
}
static void bcm63138_leds_set_bright(struct bcm63138_leds *leds,
struct bcm63138_led *led,
u8 value)
{
int reg_offset = (led->pin >> fls((BCM63138_LEDS_PER_REG - 1))) * 4;
int shift = (led->pin & (BCM63138_LEDS_PER_REG - 1)) * BCM63138_LED_BITS;
bcm63138_leds_update_bits(leds, BCM63138_BRIGHT_CTRL1 + reg_offset,
BCM63138_LED_MASK << shift, value << shift);
}
static void bcm63138_leds_enable_led(struct bcm63138_leds *leds,
struct bcm63138_led *led,
enum led_brightness value)
{
u32 bit = BIT(led->pin);
bcm63138_leds_update_bits(leds, BCM63138_SW_DATA, bit, value ? bit : 0);
}
/*
* API callbacks
*/
static void bcm63138_leds_brightness_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
struct bcm63138_led *led = container_of(led_cdev, struct bcm63138_led, cdev);
struct bcm63138_leds *leds = led->leds;
unsigned long flags;
spin_lock_irqsave(&leds->lock, flags);
bcm63138_leds_enable_led(leds, led, value);
if (!value)
bcm63138_leds_set_flash_rate(leds, led, 0);
else
bcm63138_leds_set_bright(leds, led, value);
spin_unlock_irqrestore(&leds->lock, flags);
}
static int bcm63138_leds_blink_set(struct led_classdev *led_cdev,
unsigned long *delay_on,
unsigned long *delay_off)
{
struct bcm63138_led *led = container_of(led_cdev, struct bcm63138_led, cdev);
struct bcm63138_leds *leds = led->leds;
unsigned long flags;
u8 value;
if (!*delay_on && !*delay_off) {
*delay_on = 640;
*delay_off = 640;
}
if (*delay_on != *delay_off) {
dev_dbg(led_cdev->dev, "Blinking at unequal delays is not supported\n");
return -EINVAL;
}
switch (*delay_on) {
case 1152 ... 1408: /* 1280 ms ± 10% */
value = 0x7;
break;
case 576 ... 704: /* 640 ms ± 10% */
value = 0x6;
break;
case 288 ... 352: /* 320 ms ± 10% */
value = 0x5;
break;
case 126 ... 154: /* 140 ms ± 10% */
value = 0x4;
break;
case 59 ... 72: /* 65 ms ± 10% */
value = 0x3;
break;
default:
dev_dbg(led_cdev->dev, "Blinking delay value %lu is unsupported\n",
*delay_on);
return -EINVAL;
}
spin_lock_irqsave(&leds->lock, flags);
bcm63138_leds_enable_led(leds, led, BCM63138_MAX_BRIGHTNESS);
bcm63138_leds_set_flash_rate(leds, led, value);
spin_unlock_irqrestore(&leds->lock, flags);
return 0;
}
/*
* LED driver
*/
static void bcm63138_leds_create_led(struct bcm63138_leds *leds,
struct device_node *np)
{
struct led_init_data init_data = {
.fwnode = of_fwnode_handle(np),
};
struct device *dev = leds->dev;
struct bcm63138_led *led;
struct pinctrl *pinctrl;
u32 bit;
int err;
led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL);
if (!led) {
dev_err(dev, "Failed to alloc LED\n");
return;
}
led->leds = leds;
if (of_property_read_u32(np, "reg", &led->pin)) {
dev_err(dev, "Missing \"reg\" property in %pOF\n", np);
goto err_free;
}
if (led->pin >= BCM63138_MAX_LEDS) {
dev_err(dev, "Invalid \"reg\" value %d\n", led->pin);
goto err_free;
}
led->active_low = of_property_read_bool(np, "active-low");
led->cdev.max_brightness = BCM63138_MAX_BRIGHTNESS;
led->cdev.brightness_set = bcm63138_leds_brightness_set;
led->cdev.blink_set = bcm63138_leds_blink_set;
err = devm_led_classdev_register_ext(dev, &led->cdev, &init_data);
if (err) {
dev_err(dev, "Failed to register LED %pOF: %d\n", np, err);
goto err_free;
}
pinctrl = devm_pinctrl_get_select_default(led->cdev.dev);
if (IS_ERR(pinctrl) && PTR_ERR(pinctrl) != -ENODEV) {
dev_warn(led->cdev.dev, "Failed to select %pOF pinctrl: %ld\n",
np, PTR_ERR(pinctrl));
}
bit = BIT(led->pin);
bcm63138_leds_update_bits(leds, BCM63138_PARALLEL_LED_POLARITY, bit,
led->active_low ? 0 : bit);
bcm63138_leds_update_bits(leds, BCM63138_HW_LED_EN, bit, 0);
bcm63138_leds_set_flash_rate(leds, led, 0);
bcm63138_leds_enable_led(leds, led, led->cdev.brightness);
return;
err_free:
devm_kfree(dev, led);
}
static int bcm63138_leds_probe(struct platform_device *pdev)
{
struct device_node *np = dev_of_node(&pdev->dev);
struct device *dev = &pdev->dev;
struct bcm63138_leds *leds;
struct device_node *child;
leds = devm_kzalloc(dev, sizeof(*leds), GFP_KERNEL);
if (!leds)
return -ENOMEM;
leds->dev = dev;
leds->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(leds->base))
return PTR_ERR(leds->base);
spin_lock_init(&leds->lock);
bcm63138_leds_write(leds, BCM63138_GLB_CTRL,
BCM63138_GLB_CTRL_SERIAL_LED_DATA_PPOL |
BCM63138_GLB_CTRL_SERIAL_LED_EN_POL);
bcm63138_leds_write(leds, BCM63138_HW_LED_EN, 0);
bcm63138_leds_write(leds, BCM63138_SERIAL_LED_POLARITY, 0);
bcm63138_leds_write(leds, BCM63138_PARALLEL_LED_POLARITY, 0);
for_each_available_child_of_node(np, child) {
bcm63138_leds_create_led(leds, child);
}
return 0;
}
static const struct of_device_id bcm63138_leds_of_match_table[] = {
{ .compatible = "brcm,bcm63138-leds", },
{ },
};
static struct platform_driver bcm63138_leds_driver = {
.probe = bcm63138_leds_probe,
.driver = {
.name = "leds-bcm63xxx",
.of_match_table = bcm63138_leds_of_match_table,
},
};
module_platform_driver(bcm63138_leds_driver);
MODULE_AUTHOR("Rafał Miłecki");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(of, bcm63138_leds_of_match_table);
| linux-master | drivers/leds/blink/leds-bcm63138.c |
// SPDX-License-Identifier: GPL-2.0
/*
* Intel Lightning Mountain SoC LED Serial Shift Output Controller driver
*
* Copyright (c) 2020 Intel Corporation.
*/
#include <linux/bitfield.h>
#include <linux/clk.h>
#include <linux/gpio/consumer.h>
#include <linux/gpio/driver.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/leds.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/property.h>
#include <linux/regmap.h>
#include <linux/sizes.h>
#include <linux/uaccess.h>
#define SSO_DEV_NAME "lgm-sso"
#define LED_BLINK_H8_0 0x0
#define LED_BLINK_H8_1 0x4
#define GET_FREQ_OFFSET(pin, src) (((pin) * 6) + ((src) * 2))
#define GET_SRC_OFFSET(pinc) (((pin) * 6) + 4)
#define DUTY_CYCLE(x) (0x8 + ((x) * 4))
#define SSO_CON0 0x2B0
#define SSO_CON0_RZFL BIT(26)
#define SSO_CON0_BLINK_R BIT(30)
#define SSO_CON0_SWU BIT(31)
#define SSO_CON1 0x2B4
#define SSO_CON1_FCDSC GENMASK(21, 20) /* Fixed Divider Shift Clock */
#define SSO_CON1_FPID GENMASK(24, 23)
#define SSO_CON1_GPTD GENMASK(26, 25)
#define SSO_CON1_US GENMASK(31, 30)
#define SSO_CPU 0x2B8
#define SSO_CON2 0x2C4
#define SSO_CON3 0x2C8
/* Driver MACRO */
#define MAX_PIN_NUM_PER_BANK SZ_32
#define MAX_GROUP_NUM SZ_4
#define PINS_PER_GROUP SZ_8
#define FPID_FREQ_RANK_MAX SZ_4
#define SSO_LED_MAX_NUM SZ_32
#define MAX_FREQ_RANK 10
#define DEF_GPTC_CLK_RATE 200000000
#define SSO_DEF_BRIGHTNESS LED_HALF
#define DATA_CLK_EDGE 0 /* 0-rising, 1-falling */
static const u32 freq_div_tbl[] = {4000, 2000, 1000, 800};
static const int freq_tbl[] = {2, 4, 8, 10, 50000, 100000, 200000, 250000};
static const int shift_clk_freq_tbl[] = {25000000, 12500000, 6250000, 3125000};
/*
* Update Source to update the SOUTs
* SW - Software has to update the SWU bit
* GPTC - General Purpose timer is used as clock source
* FPID - Divided FSC clock (FPID) is used as clock source
*/
enum {
US_SW = 0,
US_GPTC = 1,
US_FPID = 2
};
enum {
MAX_FPID_FREQ_RANK = 5, /* 1 to 4 */
MAX_GPTC_FREQ_RANK = 9, /* 5 to 8 */
MAX_GPTC_HS_FREQ_RANK = 10, /* 9 to 10 */
};
enum {
LED_GRP0_PIN_MAX = 24,
LED_GRP1_PIN_MAX = 29,
LED_GRP2_PIN_MAX = 32,
};
enum {
LED_GRP0_0_23,
LED_GRP1_24_28,
LED_GRP2_29_31,
LED_GROUP_MAX,
};
enum {
CLK_SRC_FPID = 0,
CLK_SRC_GPTC = 1,
CLK_SRC_GPTC_HS = 2,
};
struct sso_led_priv;
struct sso_led_desc {
const char *name;
const char *default_trigger;
unsigned int brightness;
unsigned int blink_rate;
unsigned int retain_state_suspended:1;
unsigned int retain_state_shutdown:1;
unsigned int panic_indicator:1;
unsigned int hw_blink:1;
unsigned int hw_trig:1;
unsigned int blinking:1;
int freq_idx;
u32 pin;
};
struct sso_led {
struct list_head list;
struct led_classdev cdev;
struct gpio_desc *gpiod;
struct sso_led_desc desc;
struct sso_led_priv *priv;
};
struct sso_gpio {
struct gpio_chip chip;
int shift_clk_freq;
int edge;
int freq;
u32 pins;
u32 alloc_bitmap;
};
struct sso_led_priv {
struct regmap *mmap;
struct device *dev;
struct platform_device *pdev;
struct clk_bulk_data clocks[2];
u32 fpid_clkrate;
u32 gptc_clkrate;
u32 freq[MAX_FREQ_RANK];
struct list_head led_list;
struct sso_gpio gpio;
};
static int sso_get_blink_rate_idx(struct sso_led_priv *priv, u32 rate)
{
int i;
for (i = 0; i < MAX_FREQ_RANK; i++) {
if (rate <= priv->freq[i])
return i;
}
return -1;
}
static unsigned int sso_led_pin_to_group(u32 pin)
{
if (pin < LED_GRP0_PIN_MAX)
return LED_GRP0_0_23;
else if (pin < LED_GRP1_PIN_MAX)
return LED_GRP1_24_28;
else
return LED_GRP2_29_31;
}
static u32 sso_led_get_freq_src(int freq_idx)
{
if (freq_idx < MAX_FPID_FREQ_RANK)
return CLK_SRC_FPID;
else if (freq_idx < MAX_GPTC_FREQ_RANK)
return CLK_SRC_GPTC;
else
return CLK_SRC_GPTC_HS;
}
static u32 sso_led_pin_blink_off(u32 pin, unsigned int group)
{
if (group == LED_GRP2_29_31)
return pin - LED_GRP1_PIN_MAX;
else if (group == LED_GRP1_24_28)
return pin - LED_GRP0_PIN_MAX;
else /* led 0 - 23 in led 32 location */
return SSO_LED_MAX_NUM - LED_GRP1_PIN_MAX;
}
static struct sso_led
*cdev_to_sso_led_data(struct led_classdev *led_cdev)
{
return container_of(led_cdev, struct sso_led, cdev);
}
static void sso_led_freq_set(struct sso_led_priv *priv, u32 pin, int freq_idx)
{
u32 reg, off, freq_src, val_freq;
u32 low, high, val;
unsigned int group;
if (!freq_idx)
return;
group = sso_led_pin_to_group(pin);
freq_src = sso_led_get_freq_src(freq_idx);
off = sso_led_pin_blink_off(pin, group);
if (group == LED_GRP0_0_23)
return;
else if (group == LED_GRP1_24_28)
reg = LED_BLINK_H8_0;
else
reg = LED_BLINK_H8_1;
if (freq_src == CLK_SRC_FPID)
val_freq = freq_idx - 1;
else if (freq_src == CLK_SRC_GPTC)
val_freq = freq_idx - MAX_FPID_FREQ_RANK;
/* set blink rate idx */
if (freq_src != CLK_SRC_GPTC_HS) {
low = GET_FREQ_OFFSET(off, freq_src);
high = low + 2;
val = val_freq << high;
regmap_update_bits(priv->mmap, reg, GENMASK(high, low), val);
}
/* select clock source */
low = GET_SRC_OFFSET(off);
high = low + 2;
val = freq_src << high;
regmap_update_bits(priv->mmap, reg, GENMASK(high, low), val);
}
static void sso_led_brightness_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
struct sso_led_priv *priv;
struct sso_led_desc *desc;
struct sso_led *led;
int val;
led = cdev_to_sso_led_data(led_cdev);
priv = led->priv;
desc = &led->desc;
desc->brightness = brightness;
regmap_write(priv->mmap, DUTY_CYCLE(desc->pin), brightness);
if (brightness == LED_OFF)
val = 0;
else
val = 1;
/* HW blink off */
if (desc->hw_blink && !val && desc->blinking) {
desc->blinking = 0;
regmap_update_bits(priv->mmap, SSO_CON2, BIT(desc->pin), 0);
} else if (desc->hw_blink && val && !desc->blinking) {
desc->blinking = 1;
regmap_update_bits(priv->mmap, SSO_CON2, BIT(desc->pin),
1 << desc->pin);
}
if (!desc->hw_trig)
gpiod_set_value(led->gpiod, val);
}
static enum led_brightness sso_led_brightness_get(struct led_classdev *led_cdev)
{
struct sso_led *led = cdev_to_sso_led_data(led_cdev);
return (enum led_brightness)led->desc.brightness;
}
static int
delay_to_freq_idx(struct sso_led *led, unsigned long *delay_on,
unsigned long *delay_off)
{
struct sso_led_priv *priv = led->priv;
unsigned long delay;
int freq_idx;
u32 freq;
if (!*delay_on && !*delay_off) {
*delay_on = *delay_off = (1000 / priv->freq[0]) / 2;
return 0;
}
delay = *delay_on + *delay_off;
freq = 1000 / delay;
freq_idx = sso_get_blink_rate_idx(priv, freq);
if (freq_idx == -1)
freq_idx = MAX_FREQ_RANK - 1;
delay = 1000 / priv->freq[freq_idx];
*delay_on = *delay_off = delay / 2;
if (!*delay_on)
*delay_on = *delay_off = 1;
return freq_idx;
}
static int
sso_led_blink_set(struct led_classdev *led_cdev, unsigned long *delay_on,
unsigned long *delay_off)
{
struct sso_led_priv *priv;
struct sso_led *led;
int freq_idx;
led = cdev_to_sso_led_data(led_cdev);
priv = led->priv;
freq_idx = delay_to_freq_idx(led, delay_on, delay_off);
sso_led_freq_set(priv, led->desc.pin, freq_idx);
regmap_update_bits(priv->mmap, SSO_CON2, BIT(led->desc.pin),
1 << led->desc.pin);
led->desc.freq_idx = freq_idx;
led->desc.blink_rate = priv->freq[freq_idx];
led->desc.blinking = 1;
return 1;
}
static void sso_led_hw_cfg(struct sso_led_priv *priv, struct sso_led *led)
{
struct sso_led_desc *desc = &led->desc;
/* set freq */
if (desc->hw_blink) {
sso_led_freq_set(priv, desc->pin, desc->freq_idx);
regmap_update_bits(priv->mmap, SSO_CON2, BIT(desc->pin),
1 << desc->pin);
}
if (desc->hw_trig)
regmap_update_bits(priv->mmap, SSO_CON3, BIT(desc->pin),
1 << desc->pin);
/* set brightness */
regmap_write(priv->mmap, DUTY_CYCLE(desc->pin), desc->brightness);
/* enable output */
if (!desc->hw_trig && desc->brightness)
gpiod_set_value(led->gpiod, 1);
}
static int sso_create_led(struct sso_led_priv *priv, struct sso_led *led,
struct fwnode_handle *child)
{
struct sso_led_desc *desc = &led->desc;
struct led_init_data init_data;
int err;
init_data.fwnode = child;
init_data.devicename = SSO_DEV_NAME;
init_data.default_label = ":";
led->cdev.default_trigger = desc->default_trigger;
led->cdev.brightness_set = sso_led_brightness_set;
led->cdev.brightness_get = sso_led_brightness_get;
led->cdev.brightness = desc->brightness;
led->cdev.max_brightness = LED_FULL;
if (desc->retain_state_shutdown)
led->cdev.flags |= LED_RETAIN_AT_SHUTDOWN;
if (desc->retain_state_suspended)
led->cdev.flags |= LED_CORE_SUSPENDRESUME;
if (desc->panic_indicator)
led->cdev.flags |= LED_PANIC_INDICATOR;
if (desc->hw_blink)
led->cdev.blink_set = sso_led_blink_set;
sso_led_hw_cfg(priv, led);
err = devm_led_classdev_register_ext(priv->dev, &led->cdev, &init_data);
if (err)
return err;
list_add(&led->list, &priv->led_list);
return 0;
}
static void sso_init_freq(struct sso_led_priv *priv)
{
int i;
priv->freq[0] = 0;
for (i = 1; i < MAX_FREQ_RANK; i++) {
if (i < MAX_FPID_FREQ_RANK) {
priv->freq[i] = priv->fpid_clkrate / freq_div_tbl[i - 1];
} else if (i < MAX_GPTC_FREQ_RANK) {
priv->freq[i] = priv->gptc_clkrate /
freq_div_tbl[i - MAX_FPID_FREQ_RANK];
} else if (i < MAX_GPTC_HS_FREQ_RANK) {
priv->freq[i] = priv->gptc_clkrate;
}
}
}
static int sso_gpio_request(struct gpio_chip *chip, unsigned int offset)
{
struct sso_led_priv *priv = gpiochip_get_data(chip);
if (priv->gpio.alloc_bitmap & BIT(offset))
return -EINVAL;
priv->gpio.alloc_bitmap |= BIT(offset);
regmap_write(priv->mmap, DUTY_CYCLE(offset), 0xFF);
return 0;
}
static void sso_gpio_free(struct gpio_chip *chip, unsigned int offset)
{
struct sso_led_priv *priv = gpiochip_get_data(chip);
priv->gpio.alloc_bitmap &= ~BIT(offset);
regmap_write(priv->mmap, DUTY_CYCLE(offset), 0x0);
}
static int sso_gpio_get_dir(struct gpio_chip *chip, unsigned int offset)
{
return GPIO_LINE_DIRECTION_OUT;
}
static int
sso_gpio_dir_out(struct gpio_chip *chip, unsigned int offset, int value)
{
struct sso_led_priv *priv = gpiochip_get_data(chip);
bool bit = !!value;
regmap_update_bits(priv->mmap, SSO_CPU, BIT(offset), bit << offset);
if (!priv->gpio.freq)
regmap_update_bits(priv->mmap, SSO_CON0, SSO_CON0_SWU,
SSO_CON0_SWU);
return 0;
}
static int sso_gpio_get(struct gpio_chip *chip, unsigned int offset)
{
struct sso_led_priv *priv = gpiochip_get_data(chip);
u32 reg_val;
regmap_read(priv->mmap, SSO_CPU, ®_val);
return !!(reg_val & BIT(offset));
}
static void sso_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
{
struct sso_led_priv *priv = gpiochip_get_data(chip);
regmap_update_bits(priv->mmap, SSO_CPU, BIT(offset), value << offset);
if (!priv->gpio.freq)
regmap_update_bits(priv->mmap, SSO_CON0, SSO_CON0_SWU,
SSO_CON0_SWU);
}
static int sso_gpio_gc_init(struct device *dev, struct sso_led_priv *priv)
{
struct gpio_chip *gc = &priv->gpio.chip;
gc->request = sso_gpio_request;
gc->free = sso_gpio_free;
gc->get_direction = sso_gpio_get_dir;
gc->direction_output = sso_gpio_dir_out;
gc->get = sso_gpio_get;
gc->set = sso_gpio_set;
gc->label = "lgm-sso";
gc->base = -1;
/* To exclude pins from control, use "gpio-reserved-ranges" */
gc->ngpio = priv->gpio.pins;
gc->parent = dev;
gc->owner = THIS_MODULE;
return devm_gpiochip_add_data(dev, gc, priv);
}
static int sso_gpio_get_freq_idx(int freq)
{
int idx;
for (idx = 0; idx < ARRAY_SIZE(freq_tbl); idx++) {
if (freq <= freq_tbl[idx])
return idx;
}
return -1;
}
static void sso_register_shift_clk(struct sso_led_priv *priv)
{
int idx, size = ARRAY_SIZE(shift_clk_freq_tbl);
u32 val = 0;
for (idx = 0; idx < size; idx++) {
if (shift_clk_freq_tbl[idx] <= priv->gpio.shift_clk_freq) {
val = idx;
break;
}
}
if (idx == size)
dev_warn(priv->dev, "%s: Invalid freq %d\n",
__func__, priv->gpio.shift_clk_freq);
regmap_update_bits(priv->mmap, SSO_CON1, SSO_CON1_FCDSC,
FIELD_PREP(SSO_CON1_FCDSC, val));
}
static int sso_gpio_freq_set(struct sso_led_priv *priv)
{
int freq_idx;
u32 val;
freq_idx = sso_gpio_get_freq_idx(priv->gpio.freq);
if (freq_idx == -1)
freq_idx = ARRAY_SIZE(freq_tbl) - 1;
val = freq_idx % FPID_FREQ_RANK_MAX;
if (!priv->gpio.freq) {
regmap_update_bits(priv->mmap, SSO_CON0, SSO_CON0_BLINK_R, 0);
regmap_update_bits(priv->mmap, SSO_CON1, SSO_CON1_US,
FIELD_PREP(SSO_CON1_US, US_SW));
} else if (freq_idx < FPID_FREQ_RANK_MAX) {
regmap_update_bits(priv->mmap, SSO_CON0, SSO_CON0_BLINK_R,
SSO_CON0_BLINK_R);
regmap_update_bits(priv->mmap, SSO_CON1, SSO_CON1_US,
FIELD_PREP(SSO_CON1_US, US_FPID));
regmap_update_bits(priv->mmap, SSO_CON1, SSO_CON1_FPID,
FIELD_PREP(SSO_CON1_FPID, val));
} else {
regmap_update_bits(priv->mmap, SSO_CON0, SSO_CON0_BLINK_R,
SSO_CON0_BLINK_R);
regmap_update_bits(priv->mmap, SSO_CON1, SSO_CON1_US,
FIELD_PREP(SSO_CON1_US, US_GPTC));
regmap_update_bits(priv->mmap, SSO_CON1, SSO_CON1_GPTD,
FIELD_PREP(SSO_CON1_GPTD, val));
}
return 0;
}
static int sso_gpio_hw_init(struct sso_led_priv *priv)
{
u32 activate;
int i, err;
/* Clear all duty cycles */
for (i = 0; i < priv->gpio.pins; i++) {
err = regmap_write(priv->mmap, DUTY_CYCLE(i), 0);
if (err)
return err;
}
/* 4 groups for total 32 pins */
for (i = 1; i <= MAX_GROUP_NUM; i++) {
activate = !!(i * PINS_PER_GROUP <= priv->gpio.pins ||
priv->gpio.pins > (i - 1) * PINS_PER_GROUP);
err = regmap_update_bits(priv->mmap, SSO_CON1, BIT(i - 1),
activate << (i - 1));
if (err)
return err;
}
/* NO HW directly controlled pin by default */
err = regmap_write(priv->mmap, SSO_CON3, 0);
if (err)
return err;
/* NO BLINK for all pins */
err = regmap_write(priv->mmap, SSO_CON2, 0);
if (err)
return err;
/* OUTPUT 0 by default */
err = regmap_write(priv->mmap, SSO_CPU, 0);
if (err)
return err;
/* update edge */
err = regmap_update_bits(priv->mmap, SSO_CON0, SSO_CON0_RZFL,
FIELD_PREP(SSO_CON0_RZFL, priv->gpio.edge));
if (err)
return err;
/* Set GPIO update rate */
sso_gpio_freq_set(priv);
/* Register shift clock */
sso_register_shift_clk(priv);
return 0;
}
static void sso_led_shutdown(struct sso_led *led)
{
struct sso_led_priv *priv = led->priv;
/* unregister led */
devm_led_classdev_unregister(priv->dev, &led->cdev);
/* clear HW control bit */
if (led->desc.hw_trig)
regmap_update_bits(priv->mmap, SSO_CON3, BIT(led->desc.pin), 0);
led->priv = NULL;
}
static int
__sso_led_dt_parse(struct sso_led_priv *priv, struct fwnode_handle *fw_ssoled)
{
struct fwnode_handle *fwnode_child;
struct device *dev = priv->dev;
struct sso_led_desc *desc;
struct sso_led *led;
const char *tmp;
u32 prop;
int ret;
fwnode_for_each_child_node(fw_ssoled, fwnode_child) {
led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL);
if (!led) {
ret = -ENOMEM;
goto __dt_err;
}
INIT_LIST_HEAD(&led->list);
led->priv = priv;
desc = &led->desc;
led->gpiod = devm_fwnode_gpiod_get(dev, fwnode_child, NULL,
GPIOD_ASIS, NULL);
if (IS_ERR(led->gpiod)) {
ret = dev_err_probe(dev, PTR_ERR(led->gpiod), "led: get gpio fail!\n");
goto __dt_err;
}
fwnode_property_read_string(fwnode_child,
"linux,default-trigger",
&desc->default_trigger);
if (fwnode_property_present(fwnode_child,
"retain-state-suspended"))
desc->retain_state_suspended = 1;
if (fwnode_property_present(fwnode_child,
"retain-state-shutdown"))
desc->retain_state_shutdown = 1;
if (fwnode_property_present(fwnode_child, "panic-indicator"))
desc->panic_indicator = 1;
ret = fwnode_property_read_u32(fwnode_child, "reg", &prop);
if (ret)
goto __dt_err;
if (prop >= SSO_LED_MAX_NUM) {
dev_err(dev, "invalid LED pin:%u\n", prop);
ret = -EINVAL;
goto __dt_err;
}
desc->pin = prop;
if (fwnode_property_present(fwnode_child, "intel,sso-hw-blink"))
desc->hw_blink = 1;
desc->hw_trig = fwnode_property_read_bool(fwnode_child,
"intel,sso-hw-trigger");
if (desc->hw_trig) {
desc->default_trigger = NULL;
desc->retain_state_shutdown = 0;
desc->retain_state_suspended = 0;
desc->panic_indicator = 0;
desc->hw_blink = 0;
}
if (fwnode_property_read_u32(fwnode_child,
"intel,sso-blink-rate-hz", &prop)) {
/* default first freq rate */
desc->freq_idx = 0;
desc->blink_rate = priv->freq[desc->freq_idx];
} else {
desc->freq_idx = sso_get_blink_rate_idx(priv, prop);
if (desc->freq_idx == -1)
desc->freq_idx = MAX_FREQ_RANK - 1;
desc->blink_rate = priv->freq[desc->freq_idx];
}
if (!fwnode_property_read_string(fwnode_child, "default-state", &tmp)) {
if (!strcmp(tmp, "on"))
desc->brightness = LED_FULL;
}
ret = sso_create_led(priv, led, fwnode_child);
if (ret)
goto __dt_err;
}
return 0;
__dt_err:
fwnode_handle_put(fwnode_child);
/* unregister leds */
list_for_each_entry(led, &priv->led_list, list)
sso_led_shutdown(led);
return ret;
}
static int sso_led_dt_parse(struct sso_led_priv *priv)
{
struct fwnode_handle *fwnode = dev_fwnode(priv->dev);
struct fwnode_handle *fw_ssoled;
struct device *dev = priv->dev;
int count;
int ret;
count = device_get_child_node_count(dev);
if (!count)
return 0;
fw_ssoled = fwnode_get_named_child_node(fwnode, "ssoled");
if (fw_ssoled) {
ret = __sso_led_dt_parse(priv, fw_ssoled);
fwnode_handle_put(fw_ssoled);
if (ret)
return ret;
}
return 0;
}
static int sso_probe_gpios(struct sso_led_priv *priv)
{
struct device *dev = priv->dev;
int ret;
if (device_property_read_u32(dev, "ngpios", &priv->gpio.pins))
priv->gpio.pins = MAX_PIN_NUM_PER_BANK;
if (priv->gpio.pins > MAX_PIN_NUM_PER_BANK)
return -EINVAL;
if (device_property_read_u32(dev, "intel,sso-update-rate-hz",
&priv->gpio.freq))
priv->gpio.freq = 0;
priv->gpio.edge = DATA_CLK_EDGE;
priv->gpio.shift_clk_freq = -1;
ret = sso_gpio_hw_init(priv);
if (ret)
return ret;
return sso_gpio_gc_init(dev, priv);
}
static void sso_clock_disable_unprepare(void *data)
{
struct sso_led_priv *priv = data;
clk_bulk_disable_unprepare(ARRAY_SIZE(priv->clocks), priv->clocks);
}
static int intel_sso_led_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct sso_led_priv *priv;
int ret;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->pdev = pdev;
priv->dev = dev;
/* gate clock */
priv->clocks[0].id = "sso";
/* fpid clock */
priv->clocks[1].id = "fpid";
ret = devm_clk_bulk_get(dev, ARRAY_SIZE(priv->clocks), priv->clocks);
if (ret) {
dev_err(dev, "Getting clocks failed!\n");
return ret;
}
ret = clk_bulk_prepare_enable(ARRAY_SIZE(priv->clocks), priv->clocks);
if (ret) {
dev_err(dev, "Failed to prepare and enable clocks!\n");
return ret;
}
ret = devm_add_action_or_reset(dev, sso_clock_disable_unprepare, priv);
if (ret)
return ret;
priv->fpid_clkrate = clk_get_rate(priv->clocks[1].clk);
priv->mmap = syscon_node_to_regmap(dev->of_node);
priv->mmap = syscon_node_to_regmap(dev->of_node);
if (IS_ERR(priv->mmap)) {
dev_err(dev, "Failed to map iomem!\n");
return PTR_ERR(priv->mmap);
}
ret = sso_probe_gpios(priv);
if (ret) {
regmap_exit(priv->mmap);
return ret;
}
INIT_LIST_HEAD(&priv->led_list);
platform_set_drvdata(pdev, priv);
sso_init_freq(priv);
priv->gptc_clkrate = DEF_GPTC_CLK_RATE;
ret = sso_led_dt_parse(priv);
if (ret) {
regmap_exit(priv->mmap);
return ret;
}
dev_info(priv->dev, "sso LED init success!\n");
return 0;
}
static int intel_sso_led_remove(struct platform_device *pdev)
{
struct sso_led_priv *priv;
struct sso_led *led, *n;
priv = platform_get_drvdata(pdev);
list_for_each_entry_safe(led, n, &priv->led_list, list) {
list_del(&led->list);
sso_led_shutdown(led);
}
regmap_exit(priv->mmap);
return 0;
}
static const struct of_device_id of_sso_led_match[] = {
{ .compatible = "intel,lgm-ssoled" },
{}
};
MODULE_DEVICE_TABLE(of, of_sso_led_match);
static struct platform_driver intel_sso_led_driver = {
.probe = intel_sso_led_probe,
.remove = intel_sso_led_remove,
.driver = {
.name = "lgm-ssoled",
.of_match_table = of_sso_led_match,
},
};
module_platform_driver(intel_sso_led_driver);
MODULE_DESCRIPTION("Intel SSO LED/GPIO driver");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/blink/leds-lgm-sso.c |
// SPDX-License-Identifier: GPL-2.0
//
// Audio Mute LED trigger
//
#include <linux/kernel.h>
#include <linux/leds.h>
#include <linux/module.h>
#include "../leds.h"
static enum led_brightness audio_state[NUM_AUDIO_LEDS];
static int ledtrig_audio_mute_activate(struct led_classdev *led_cdev)
{
led_set_brightness_nosleep(led_cdev, audio_state[LED_AUDIO_MUTE]);
return 0;
}
static int ledtrig_audio_micmute_activate(struct led_classdev *led_cdev)
{
led_set_brightness_nosleep(led_cdev, audio_state[LED_AUDIO_MICMUTE]);
return 0;
}
static struct led_trigger ledtrig_audio[NUM_AUDIO_LEDS] = {
[LED_AUDIO_MUTE] = {
.name = "audio-mute",
.activate = ledtrig_audio_mute_activate,
},
[LED_AUDIO_MICMUTE] = {
.name = "audio-micmute",
.activate = ledtrig_audio_micmute_activate,
},
};
enum led_brightness ledtrig_audio_get(enum led_audio type)
{
return audio_state[type];
}
EXPORT_SYMBOL_GPL(ledtrig_audio_get);
void ledtrig_audio_set(enum led_audio type, enum led_brightness state)
{
audio_state[type] = state;
led_trigger_event(&ledtrig_audio[type], state);
}
EXPORT_SYMBOL_GPL(ledtrig_audio_set);
static int __init ledtrig_audio_init(void)
{
led_trigger_register(&ledtrig_audio[LED_AUDIO_MUTE]);
led_trigger_register(&ledtrig_audio[LED_AUDIO_MICMUTE]);
return 0;
}
module_init(ledtrig_audio_init);
static void __exit ledtrig_audio_exit(void)
{
led_trigger_unregister(&ledtrig_audio[LED_AUDIO_MUTE]);
led_trigger_unregister(&ledtrig_audio[LED_AUDIO_MICMUTE]);
}
module_exit(ledtrig_audio_exit);
MODULE_DESCRIPTION("LED trigger for audio mute control");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/trigger/ledtrig-audio.c |
// SPDX-License-Identifier: GPL-2.0
//
// LED Kernel Transient Trigger
//
// Transient trigger allows one shot timer activation. Please refer to
// Documentation/leds/ledtrig-transient.rst for details
// Copyright (C) 2012 Shuah Khan <[email protected]>
//
// Based on Richard Purdie's ledtrig-timer.c and Atsushi Nemoto's
// ledtrig-heartbeat.c
// Design and use-case input from Jonas Bonn <[email protected]> and
// Neil Brown <[email protected]>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/slab.h>
#include <linux/timer.h>
#include <linux/leds.h>
#include "../leds.h"
struct transient_trig_data {
int activate;
int state;
int restore_state;
unsigned long duration;
struct timer_list timer;
struct led_classdev *led_cdev;
};
static void transient_timer_function(struct timer_list *t)
{
struct transient_trig_data *transient_data =
from_timer(transient_data, t, timer);
struct led_classdev *led_cdev = transient_data->led_cdev;
transient_data->activate = 0;
led_set_brightness_nosleep(led_cdev, transient_data->restore_state);
}
static ssize_t transient_activate_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct transient_trig_data *transient_data =
led_trigger_get_drvdata(dev);
return sprintf(buf, "%d\n", transient_data->activate);
}
static ssize_t transient_activate_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t size)
{
struct led_classdev *led_cdev = led_trigger_get_led(dev);
struct transient_trig_data *transient_data =
led_trigger_get_drvdata(dev);
unsigned long state;
ssize_t ret;
ret = kstrtoul(buf, 10, &state);
if (ret)
return ret;
if (state != 1 && state != 0)
return -EINVAL;
/* cancel the running timer */
if (state == 0 && transient_data->activate == 1) {
del_timer(&transient_data->timer);
transient_data->activate = state;
led_set_brightness_nosleep(led_cdev,
transient_data->restore_state);
return size;
}
/* start timer if there is no active timer */
if (state == 1 && transient_data->activate == 0 &&
transient_data->duration != 0) {
transient_data->activate = state;
led_set_brightness_nosleep(led_cdev, transient_data->state);
transient_data->restore_state =
(transient_data->state == LED_FULL) ? LED_OFF : LED_FULL;
mod_timer(&transient_data->timer,
jiffies + msecs_to_jiffies(transient_data->duration));
}
/* state == 0 && transient_data->activate == 0
timer is not active - just return */
/* state == 1 && transient_data->activate == 1
timer is already active - just return */
return size;
}
static ssize_t transient_duration_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct transient_trig_data *transient_data = led_trigger_get_drvdata(dev);
return sprintf(buf, "%lu\n", transient_data->duration);
}
static ssize_t transient_duration_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t size)
{
struct transient_trig_data *transient_data =
led_trigger_get_drvdata(dev);
unsigned long state;
ssize_t ret;
ret = kstrtoul(buf, 10, &state);
if (ret)
return ret;
transient_data->duration = state;
return size;
}
static ssize_t transient_state_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct transient_trig_data *transient_data =
led_trigger_get_drvdata(dev);
int state;
state = (transient_data->state == LED_FULL) ? 1 : 0;
return sprintf(buf, "%d\n", state);
}
static ssize_t transient_state_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t size)
{
struct transient_trig_data *transient_data =
led_trigger_get_drvdata(dev);
unsigned long state;
ssize_t ret;
ret = kstrtoul(buf, 10, &state);
if (ret)
return ret;
if (state != 1 && state != 0)
return -EINVAL;
transient_data->state = (state == 1) ? LED_FULL : LED_OFF;
return size;
}
static DEVICE_ATTR(activate, 0644, transient_activate_show,
transient_activate_store);
static DEVICE_ATTR(duration, 0644, transient_duration_show,
transient_duration_store);
static DEVICE_ATTR(state, 0644, transient_state_show, transient_state_store);
static struct attribute *transient_trig_attrs[] = {
&dev_attr_activate.attr,
&dev_attr_duration.attr,
&dev_attr_state.attr,
NULL
};
ATTRIBUTE_GROUPS(transient_trig);
static int transient_trig_activate(struct led_classdev *led_cdev)
{
struct transient_trig_data *tdata;
tdata = kzalloc(sizeof(struct transient_trig_data), GFP_KERNEL);
if (!tdata)
return -ENOMEM;
led_set_trigger_data(led_cdev, tdata);
tdata->led_cdev = led_cdev;
timer_setup(&tdata->timer, transient_timer_function, 0);
return 0;
}
static void transient_trig_deactivate(struct led_classdev *led_cdev)
{
struct transient_trig_data *transient_data = led_get_trigger_data(led_cdev);
timer_shutdown_sync(&transient_data->timer);
led_set_brightness_nosleep(led_cdev, transient_data->restore_state);
kfree(transient_data);
}
static struct led_trigger transient_trigger = {
.name = "transient",
.activate = transient_trig_activate,
.deactivate = transient_trig_deactivate,
.groups = transient_trig_groups,
};
module_led_trigger(transient_trigger);
MODULE_AUTHOR("Shuah Khan <[email protected]>");
MODULE_DESCRIPTION("Transient LED trigger");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/trigger/ledtrig-transient.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* LED Kernel Default ON Trigger
*
* Copyright 2008 Nick Forbes <[email protected]>
*
* Based on Richard Purdie's ledtrig-timer.c.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/leds.h>
#include "../leds.h"
static int defon_trig_activate(struct led_classdev *led_cdev)
{
led_set_brightness_nosleep(led_cdev, led_cdev->max_brightness);
return 0;
}
static struct led_trigger defon_led_trigger = {
.name = "default-on",
.activate = defon_trig_activate,
};
module_led_trigger(defon_led_trigger);
MODULE_AUTHOR("Nick Forbes <[email protected]>");
MODULE_DESCRIPTION("Default-ON LED trigger");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/trigger/ledtrig-default-on.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* One-shot LED Trigger
*
* Copyright 2012, Fabio Baltieri <[email protected]>
*
* Based on ledtrig-timer.c by Richard Purdie <[email protected]>
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/ctype.h>
#include <linux/slab.h>
#include <linux/leds.h>
#include "../leds.h"
#define DEFAULT_DELAY 100
struct oneshot_trig_data {
unsigned int invert;
};
static ssize_t led_shot(struct device *dev,
struct device_attribute *attr, const char *buf, size_t size)
{
struct led_classdev *led_cdev = led_trigger_get_led(dev);
struct oneshot_trig_data *oneshot_data = led_trigger_get_drvdata(dev);
led_blink_set_oneshot(led_cdev,
&led_cdev->blink_delay_on, &led_cdev->blink_delay_off,
oneshot_data->invert);
/* content is ignored */
return size;
}
static ssize_t led_invert_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct oneshot_trig_data *oneshot_data = led_trigger_get_drvdata(dev);
return sprintf(buf, "%u\n", oneshot_data->invert);
}
static ssize_t led_invert_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t size)
{
struct led_classdev *led_cdev = led_trigger_get_led(dev);
struct oneshot_trig_data *oneshot_data = led_trigger_get_drvdata(dev);
unsigned long state;
int ret;
ret = kstrtoul(buf, 0, &state);
if (ret)
return ret;
oneshot_data->invert = !!state;
if (oneshot_data->invert)
led_set_brightness_nosleep(led_cdev, LED_FULL);
else
led_set_brightness_nosleep(led_cdev, LED_OFF);
return size;
}
static ssize_t led_delay_on_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct led_classdev *led_cdev = led_trigger_get_led(dev);
return sprintf(buf, "%lu\n", led_cdev->blink_delay_on);
}
static ssize_t led_delay_on_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t size)
{
struct led_classdev *led_cdev = led_trigger_get_led(dev);
unsigned long state;
int ret;
ret = kstrtoul(buf, 0, &state);
if (ret)
return ret;
led_cdev->blink_delay_on = state;
return size;
}
static ssize_t led_delay_off_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct led_classdev *led_cdev = led_trigger_get_led(dev);
return sprintf(buf, "%lu\n", led_cdev->blink_delay_off);
}
static ssize_t led_delay_off_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t size)
{
struct led_classdev *led_cdev = led_trigger_get_led(dev);
unsigned long state;
int ret;
ret = kstrtoul(buf, 0, &state);
if (ret)
return ret;
led_cdev->blink_delay_off = state;
return size;
}
static DEVICE_ATTR(delay_on, 0644, led_delay_on_show, led_delay_on_store);
static DEVICE_ATTR(delay_off, 0644, led_delay_off_show, led_delay_off_store);
static DEVICE_ATTR(invert, 0644, led_invert_show, led_invert_store);
static DEVICE_ATTR(shot, 0200, NULL, led_shot);
static struct attribute *oneshot_trig_attrs[] = {
&dev_attr_delay_on.attr,
&dev_attr_delay_off.attr,
&dev_attr_invert.attr,
&dev_attr_shot.attr,
NULL
};
ATTRIBUTE_GROUPS(oneshot_trig);
static void pattern_init(struct led_classdev *led_cdev)
{
u32 *pattern;
unsigned int size = 0;
pattern = led_get_default_pattern(led_cdev, &size);
if (!pattern)
goto out_default;
if (size != 2) {
dev_warn(led_cdev->dev,
"Expected 2 but got %u values for delays pattern\n",
size);
goto out_default;
}
led_cdev->blink_delay_on = pattern[0];
led_cdev->blink_delay_off = pattern[1];
kfree(pattern);
return;
out_default:
kfree(pattern);
led_cdev->blink_delay_on = DEFAULT_DELAY;
led_cdev->blink_delay_off = DEFAULT_DELAY;
}
static int oneshot_trig_activate(struct led_classdev *led_cdev)
{
struct oneshot_trig_data *oneshot_data;
oneshot_data = kzalloc(sizeof(*oneshot_data), GFP_KERNEL);
if (!oneshot_data)
return -ENOMEM;
led_set_trigger_data(led_cdev, oneshot_data);
if (led_cdev->flags & LED_INIT_DEFAULT_TRIGGER) {
pattern_init(led_cdev);
/*
* Mark as initialized even on pattern_init() error because
* any consecutive call to it would produce the same error.
*/
led_cdev->flags &= ~LED_INIT_DEFAULT_TRIGGER;
}
return 0;
}
static void oneshot_trig_deactivate(struct led_classdev *led_cdev)
{
struct oneshot_trig_data *oneshot_data = led_get_trigger_data(led_cdev);
kfree(oneshot_data);
/* Stop blinking */
led_set_brightness(led_cdev, LED_OFF);
}
static struct led_trigger oneshot_led_trigger = {
.name = "oneshot",
.activate = oneshot_trig_activate,
.deactivate = oneshot_trig_deactivate,
.groups = oneshot_trig_groups,
};
module_led_trigger(oneshot_led_trigger);
MODULE_AUTHOR("Fabio Baltieri <[email protected]>");
MODULE_DESCRIPTION("One-shot LED trigger");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/trigger/ledtrig-oneshot.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* LED Heartbeat Trigger
*
* Copyright (C) 2006 Atsushi Nemoto <[email protected]>
*
* Based on Richard Purdie's ledtrig-timer.c and some arch's
* CONFIG_HEARTBEAT code.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/panic_notifier.h>
#include <linux/slab.h>
#include <linux/timer.h>
#include <linux/sched.h>
#include <linux/sched/loadavg.h>
#include <linux/leds.h>
#include <linux/reboot.h>
#include "../leds.h"
static int panic_heartbeats;
struct heartbeat_trig_data {
struct led_classdev *led_cdev;
unsigned int phase;
unsigned int period;
struct timer_list timer;
unsigned int invert;
};
static void led_heartbeat_function(struct timer_list *t)
{
struct heartbeat_trig_data *heartbeat_data =
from_timer(heartbeat_data, t, timer);
struct led_classdev *led_cdev;
unsigned long brightness = LED_OFF;
unsigned long delay = 0;
led_cdev = heartbeat_data->led_cdev;
if (unlikely(panic_heartbeats)) {
led_set_brightness_nosleep(led_cdev, LED_OFF);
return;
}
if (test_and_clear_bit(LED_BLINK_BRIGHTNESS_CHANGE, &led_cdev->work_flags))
led_cdev->blink_brightness = led_cdev->new_blink_brightness;
/* acts like an actual heart beat -- ie thump-thump-pause... */
switch (heartbeat_data->phase) {
case 0:
/*
* The hyperbolic function below modifies the
* heartbeat period length in dependency of the
* current (1min) load. It goes through the points
* f(0)=1260, f(1)=860, f(5)=510, f(inf)->300.
*/
heartbeat_data->period = 300 +
(6720 << FSHIFT) / (5 * avenrun[0] + (7 << FSHIFT));
heartbeat_data->period =
msecs_to_jiffies(heartbeat_data->period);
delay = msecs_to_jiffies(70);
heartbeat_data->phase++;
if (!heartbeat_data->invert)
brightness = led_cdev->blink_brightness;
break;
case 1:
delay = heartbeat_data->period / 4 - msecs_to_jiffies(70);
heartbeat_data->phase++;
if (heartbeat_data->invert)
brightness = led_cdev->blink_brightness;
break;
case 2:
delay = msecs_to_jiffies(70);
heartbeat_data->phase++;
if (!heartbeat_data->invert)
brightness = led_cdev->blink_brightness;
break;
default:
delay = heartbeat_data->period - heartbeat_data->period / 4 -
msecs_to_jiffies(70);
heartbeat_data->phase = 0;
if (heartbeat_data->invert)
brightness = led_cdev->blink_brightness;
break;
}
led_set_brightness_nosleep(led_cdev, brightness);
mod_timer(&heartbeat_data->timer, jiffies + delay);
}
static ssize_t led_invert_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct heartbeat_trig_data *heartbeat_data =
led_trigger_get_drvdata(dev);
return sprintf(buf, "%u\n", heartbeat_data->invert);
}
static ssize_t led_invert_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t size)
{
struct heartbeat_trig_data *heartbeat_data =
led_trigger_get_drvdata(dev);
unsigned long state;
int ret;
ret = kstrtoul(buf, 0, &state);
if (ret)
return ret;
heartbeat_data->invert = !!state;
return size;
}
static DEVICE_ATTR(invert, 0644, led_invert_show, led_invert_store);
static struct attribute *heartbeat_trig_attrs[] = {
&dev_attr_invert.attr,
NULL
};
ATTRIBUTE_GROUPS(heartbeat_trig);
static int heartbeat_trig_activate(struct led_classdev *led_cdev)
{
struct heartbeat_trig_data *heartbeat_data;
heartbeat_data = kzalloc(sizeof(*heartbeat_data), GFP_KERNEL);
if (!heartbeat_data)
return -ENOMEM;
led_set_trigger_data(led_cdev, heartbeat_data);
heartbeat_data->led_cdev = led_cdev;
timer_setup(&heartbeat_data->timer, led_heartbeat_function, 0);
heartbeat_data->phase = 0;
if (!led_cdev->blink_brightness)
led_cdev->blink_brightness = led_cdev->max_brightness;
led_heartbeat_function(&heartbeat_data->timer);
set_bit(LED_BLINK_SW, &led_cdev->work_flags);
return 0;
}
static void heartbeat_trig_deactivate(struct led_classdev *led_cdev)
{
struct heartbeat_trig_data *heartbeat_data =
led_get_trigger_data(led_cdev);
timer_shutdown_sync(&heartbeat_data->timer);
kfree(heartbeat_data);
clear_bit(LED_BLINK_SW, &led_cdev->work_flags);
}
static struct led_trigger heartbeat_led_trigger = {
.name = "heartbeat",
.activate = heartbeat_trig_activate,
.deactivate = heartbeat_trig_deactivate,
.groups = heartbeat_trig_groups,
};
static int heartbeat_reboot_notifier(struct notifier_block *nb,
unsigned long code, void *unused)
{
led_trigger_unregister(&heartbeat_led_trigger);
return NOTIFY_DONE;
}
static int heartbeat_panic_notifier(struct notifier_block *nb,
unsigned long code, void *unused)
{
panic_heartbeats = 1;
return NOTIFY_DONE;
}
static struct notifier_block heartbeat_reboot_nb = {
.notifier_call = heartbeat_reboot_notifier,
};
static struct notifier_block heartbeat_panic_nb = {
.notifier_call = heartbeat_panic_notifier,
};
static int __init heartbeat_trig_init(void)
{
int rc = led_trigger_register(&heartbeat_led_trigger);
if (!rc) {
atomic_notifier_chain_register(&panic_notifier_list,
&heartbeat_panic_nb);
register_reboot_notifier(&heartbeat_reboot_nb);
}
return rc;
}
static void __exit heartbeat_trig_exit(void)
{
unregister_reboot_notifier(&heartbeat_reboot_nb);
atomic_notifier_chain_unregister(&panic_notifier_list,
&heartbeat_panic_nb);
led_trigger_unregister(&heartbeat_led_trigger);
}
module_init(heartbeat_trig_init);
module_exit(heartbeat_trig_exit);
MODULE_AUTHOR("Atsushi Nemoto <[email protected]>");
MODULE_DESCRIPTION("Heartbeat LED trigger");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/trigger/ledtrig-heartbeat.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* ledtrig-gio.c - LED Trigger Based on GPIO events
*
* Copyright 2009 Felipe Balbi <[email protected]>
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/gpio.h>
#include <linux/interrupt.h>
#include <linux/leds.h>
#include <linux/slab.h>
#include "../leds.h"
struct gpio_trig_data {
struct led_classdev *led;
unsigned desired_brightness; /* desired brightness when led is on */
unsigned inverted; /* true when gpio is inverted */
unsigned gpio; /* gpio that triggers the leds */
};
static irqreturn_t gpio_trig_irq(int irq, void *_led)
{
struct led_classdev *led = _led;
struct gpio_trig_data *gpio_data = led_get_trigger_data(led);
int tmp;
tmp = gpio_get_value_cansleep(gpio_data->gpio);
if (gpio_data->inverted)
tmp = !tmp;
if (tmp) {
if (gpio_data->desired_brightness)
led_set_brightness_nosleep(gpio_data->led,
gpio_data->desired_brightness);
else
led_set_brightness_nosleep(gpio_data->led, LED_FULL);
} else {
led_set_brightness_nosleep(gpio_data->led, LED_OFF);
}
return IRQ_HANDLED;
}
static ssize_t gpio_trig_brightness_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct gpio_trig_data *gpio_data = led_trigger_get_drvdata(dev);
return sprintf(buf, "%u\n", gpio_data->desired_brightness);
}
static ssize_t gpio_trig_brightness_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t n)
{
struct gpio_trig_data *gpio_data = led_trigger_get_drvdata(dev);
unsigned desired_brightness;
int ret;
ret = sscanf(buf, "%u", &desired_brightness);
if (ret < 1 || desired_brightness > 255) {
dev_err(dev, "invalid value\n");
return -EINVAL;
}
gpio_data->desired_brightness = desired_brightness;
return n;
}
static DEVICE_ATTR(desired_brightness, 0644, gpio_trig_brightness_show,
gpio_trig_brightness_store);
static ssize_t gpio_trig_inverted_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct gpio_trig_data *gpio_data = led_trigger_get_drvdata(dev);
return sprintf(buf, "%u\n", gpio_data->inverted);
}
static ssize_t gpio_trig_inverted_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t n)
{
struct led_classdev *led = led_trigger_get_led(dev);
struct gpio_trig_data *gpio_data = led_trigger_get_drvdata(dev);
unsigned long inverted;
int ret;
ret = kstrtoul(buf, 10, &inverted);
if (ret < 0)
return ret;
if (inverted > 1)
return -EINVAL;
gpio_data->inverted = inverted;
/* After inverting, we need to update the LED. */
if (gpio_is_valid(gpio_data->gpio))
gpio_trig_irq(0, led);
return n;
}
static DEVICE_ATTR(inverted, 0644, gpio_trig_inverted_show,
gpio_trig_inverted_store);
static ssize_t gpio_trig_gpio_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct gpio_trig_data *gpio_data = led_trigger_get_drvdata(dev);
return sprintf(buf, "%u\n", gpio_data->gpio);
}
static ssize_t gpio_trig_gpio_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t n)
{
struct led_classdev *led = led_trigger_get_led(dev);
struct gpio_trig_data *gpio_data = led_trigger_get_drvdata(dev);
unsigned gpio;
int ret;
ret = sscanf(buf, "%u", &gpio);
if (ret < 1) {
dev_err(dev, "couldn't read gpio number\n");
return -EINVAL;
}
if (gpio_data->gpio == gpio)
return n;
if (!gpio_is_valid(gpio)) {
if (gpio_is_valid(gpio_data->gpio))
free_irq(gpio_to_irq(gpio_data->gpio), led);
gpio_data->gpio = gpio;
return n;
}
ret = request_threaded_irq(gpio_to_irq(gpio), NULL, gpio_trig_irq,
IRQF_ONESHOT | IRQF_SHARED | IRQF_TRIGGER_RISING
| IRQF_TRIGGER_FALLING, "ledtrig-gpio", led);
if (ret) {
dev_err(dev, "request_irq failed with error %d\n", ret);
} else {
if (gpio_is_valid(gpio_data->gpio))
free_irq(gpio_to_irq(gpio_data->gpio), led);
gpio_data->gpio = gpio;
/* After changing the GPIO, we need to update the LED. */
gpio_trig_irq(0, led);
}
return ret ? ret : n;
}
static DEVICE_ATTR(gpio, 0644, gpio_trig_gpio_show, gpio_trig_gpio_store);
static struct attribute *gpio_trig_attrs[] = {
&dev_attr_desired_brightness.attr,
&dev_attr_inverted.attr,
&dev_attr_gpio.attr,
NULL
};
ATTRIBUTE_GROUPS(gpio_trig);
static int gpio_trig_activate(struct led_classdev *led)
{
struct gpio_trig_data *gpio_data;
gpio_data = kzalloc(sizeof(*gpio_data), GFP_KERNEL);
if (!gpio_data)
return -ENOMEM;
gpio_data->led = led;
gpio_data->gpio = -ENOENT;
led_set_trigger_data(led, gpio_data);
return 0;
}
static void gpio_trig_deactivate(struct led_classdev *led)
{
struct gpio_trig_data *gpio_data = led_get_trigger_data(led);
if (gpio_is_valid(gpio_data->gpio))
free_irq(gpio_to_irq(gpio_data->gpio), led);
kfree(gpio_data);
}
static struct led_trigger gpio_led_trigger = {
.name = "gpio",
.activate = gpio_trig_activate,
.deactivate = gpio_trig_deactivate,
.groups = gpio_trig_groups,
};
module_led_trigger(gpio_led_trigger);
MODULE_AUTHOR("Felipe Balbi <[email protected]>");
MODULE_DESCRIPTION("GPIO LED trigger");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/trigger/ledtrig-gpio.c |
// SPDX-License-Identifier: GPL-2.0
/*
* LED pattern trigger
*
* Idea discussed with Pavel Machek. Raphael Teysseyre implemented
* the first version, Baolin Wang simplified and improved the approach.
*/
#include <linux/kernel.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/timer.h>
#define MAX_PATTERNS 1024
/*
* When doing gradual dimming, the led brightness will be updated
* every 50 milliseconds.
*/
#define UPDATE_INTERVAL 50
struct pattern_trig_data {
struct led_classdev *led_cdev;
struct led_pattern patterns[MAX_PATTERNS];
struct led_pattern *curr;
struct led_pattern *next;
struct mutex lock;
u32 npatterns;
int repeat;
int last_repeat;
int delta_t;
bool is_indefinite;
bool is_hw_pattern;
struct timer_list timer;
};
static void pattern_trig_update_patterns(struct pattern_trig_data *data)
{
data->curr = data->next;
if (!data->is_indefinite && data->curr == data->patterns)
data->repeat--;
if (data->next == data->patterns + data->npatterns - 1)
data->next = data->patterns;
else
data->next++;
data->delta_t = 0;
}
static int pattern_trig_compute_brightness(struct pattern_trig_data *data)
{
int step_brightness;
/*
* If current tuple's duration is less than the dimming interval,
* we should treat it as a step change of brightness instead of
* doing gradual dimming.
*/
if (data->delta_t == 0 || data->curr->delta_t < UPDATE_INTERVAL)
return data->curr->brightness;
step_brightness = abs(data->next->brightness - data->curr->brightness);
step_brightness = data->delta_t * step_brightness / data->curr->delta_t;
if (data->next->brightness > data->curr->brightness)
return data->curr->brightness + step_brightness;
else
return data->curr->brightness - step_brightness;
}
static void pattern_trig_timer_function(struct timer_list *t)
{
struct pattern_trig_data *data = from_timer(data, t, timer);
for (;;) {
if (!data->is_indefinite && !data->repeat)
break;
if (data->curr->brightness == data->next->brightness) {
/* Step change of brightness */
led_set_brightness(data->led_cdev,
data->curr->brightness);
mod_timer(&data->timer,
jiffies + msecs_to_jiffies(data->curr->delta_t));
if (!data->next->delta_t) {
/* Skip the tuple with zero duration */
pattern_trig_update_patterns(data);
}
/* Select next tuple */
pattern_trig_update_patterns(data);
} else {
/* Gradual dimming */
/*
* If the accumulation time is larger than current
* tuple's duration, we should go next one and re-check
* if we repeated done.
*/
if (data->delta_t > data->curr->delta_t) {
pattern_trig_update_patterns(data);
continue;
}
led_set_brightness(data->led_cdev,
pattern_trig_compute_brightness(data));
mod_timer(&data->timer,
jiffies + msecs_to_jiffies(UPDATE_INTERVAL));
/* Accumulate the gradual dimming time */
data->delta_t += UPDATE_INTERVAL;
}
break;
}
}
static int pattern_trig_start_pattern(struct led_classdev *led_cdev)
{
struct pattern_trig_data *data = led_cdev->trigger_data;
if (!data->npatterns)
return 0;
if (data->is_hw_pattern) {
return led_cdev->pattern_set(led_cdev, data->patterns,
data->npatterns, data->repeat);
}
/* At least 2 tuples for software pattern. */
if (data->npatterns < 2)
return -EINVAL;
data->delta_t = 0;
data->curr = data->patterns;
data->next = data->patterns + 1;
data->timer.expires = jiffies;
add_timer(&data->timer);
return 0;
}
static ssize_t repeat_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct pattern_trig_data *data = led_cdev->trigger_data;
int repeat;
mutex_lock(&data->lock);
repeat = data->last_repeat;
mutex_unlock(&data->lock);
return sysfs_emit(buf, "%d\n", repeat);
}
static ssize_t repeat_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct pattern_trig_data *data = led_cdev->trigger_data;
int err, res;
err = kstrtos32(buf, 10, &res);
if (err)
return err;
/* Number 0 and negative numbers except -1 are invalid. */
if (res < -1 || res == 0)
return -EINVAL;
mutex_lock(&data->lock);
del_timer_sync(&data->timer);
if (data->is_hw_pattern)
led_cdev->pattern_clear(led_cdev);
data->last_repeat = data->repeat = res;
/* -1 means repeat indefinitely */
if (data->repeat == -1)
data->is_indefinite = true;
else
data->is_indefinite = false;
err = pattern_trig_start_pattern(led_cdev);
mutex_unlock(&data->lock);
return err < 0 ? err : count;
}
static DEVICE_ATTR_RW(repeat);
static ssize_t pattern_trig_show_patterns(struct pattern_trig_data *data,
char *buf, bool hw_pattern)
{
ssize_t count = 0;
int i;
mutex_lock(&data->lock);
if (!data->npatterns || (data->is_hw_pattern ^ hw_pattern))
goto out;
for (i = 0; i < data->npatterns; i++) {
count += scnprintf(buf + count, PAGE_SIZE - count,
"%d %u ",
data->patterns[i].brightness,
data->patterns[i].delta_t);
}
buf[count - 1] = '\n';
out:
mutex_unlock(&data->lock);
return count;
}
static int pattern_trig_store_patterns_string(struct pattern_trig_data *data,
const char *buf, size_t count)
{
int ccount, cr, offset = 0;
while (offset < count - 1 && data->npatterns < MAX_PATTERNS) {
cr = 0;
ccount = sscanf(buf + offset, "%u %u %n",
&data->patterns[data->npatterns].brightness,
&data->patterns[data->npatterns].delta_t, &cr);
if (ccount != 2 ||
data->patterns[data->npatterns].brightness > data->led_cdev->max_brightness) {
data->npatterns = 0;
return -EINVAL;
}
offset += cr;
data->npatterns++;
}
return 0;
}
static int pattern_trig_store_patterns_int(struct pattern_trig_data *data,
const u32 *buf, size_t count)
{
unsigned int i;
for (i = 0; i < count; i += 2) {
data->patterns[data->npatterns].brightness = buf[i];
data->patterns[data->npatterns].delta_t = buf[i + 1];
data->npatterns++;
}
return 0;
}
static ssize_t pattern_trig_store_patterns(struct led_classdev *led_cdev,
const char *buf, const u32 *buf_int,
size_t count, bool hw_pattern)
{
struct pattern_trig_data *data = led_cdev->trigger_data;
int err = 0;
mutex_lock(&data->lock);
del_timer_sync(&data->timer);
if (data->is_hw_pattern)
led_cdev->pattern_clear(led_cdev);
data->is_hw_pattern = hw_pattern;
data->npatterns = 0;
if (buf)
err = pattern_trig_store_patterns_string(data, buf, count);
else
err = pattern_trig_store_patterns_int(data, buf_int, count);
if (err)
goto out;
err = pattern_trig_start_pattern(led_cdev);
if (err)
data->npatterns = 0;
out:
mutex_unlock(&data->lock);
return err < 0 ? err : count;
}
static ssize_t pattern_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct pattern_trig_data *data = led_cdev->trigger_data;
return pattern_trig_show_patterns(data, buf, false);
}
static ssize_t pattern_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
return pattern_trig_store_patterns(led_cdev, buf, NULL, count, false);
}
static DEVICE_ATTR_RW(pattern);
static ssize_t hw_pattern_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct pattern_trig_data *data = led_cdev->trigger_data;
return pattern_trig_show_patterns(data, buf, true);
}
static ssize_t hw_pattern_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
return pattern_trig_store_patterns(led_cdev, buf, NULL, count, true);
}
static DEVICE_ATTR_RW(hw_pattern);
static umode_t pattern_trig_attrs_mode(struct kobject *kobj,
struct attribute *attr, int index)
{
struct device *dev = kobj_to_dev(kobj);
struct led_classdev *led_cdev = dev_get_drvdata(dev);
if (attr == &dev_attr_repeat.attr || attr == &dev_attr_pattern.attr)
return attr->mode;
else if (attr == &dev_attr_hw_pattern.attr && led_cdev->pattern_set)
return attr->mode;
return 0;
}
static struct attribute *pattern_trig_attrs[] = {
&dev_attr_pattern.attr,
&dev_attr_hw_pattern.attr,
&dev_attr_repeat.attr,
NULL
};
static const struct attribute_group pattern_trig_group = {
.attrs = pattern_trig_attrs,
.is_visible = pattern_trig_attrs_mode,
};
static const struct attribute_group *pattern_trig_groups[] = {
&pattern_trig_group,
NULL,
};
static void pattern_init(struct led_classdev *led_cdev)
{
unsigned int size = 0;
u32 *pattern;
int err;
pattern = led_get_default_pattern(led_cdev, &size);
if (!pattern)
return;
if (size % 2) {
dev_warn(led_cdev->dev, "Expected pattern of tuples\n");
goto out;
}
err = pattern_trig_store_patterns(led_cdev, NULL, pattern, size, false);
if (err < 0)
dev_warn(led_cdev->dev,
"Pattern initialization failed with error %d\n", err);
out:
kfree(pattern);
}
static int pattern_trig_activate(struct led_classdev *led_cdev)
{
struct pattern_trig_data *data;
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
if (!!led_cdev->pattern_set ^ !!led_cdev->pattern_clear) {
dev_warn(led_cdev->dev,
"Hardware pattern ops validation failed\n");
led_cdev->pattern_set = NULL;
led_cdev->pattern_clear = NULL;
}
data->is_indefinite = true;
data->last_repeat = -1;
mutex_init(&data->lock);
data->led_cdev = led_cdev;
led_set_trigger_data(led_cdev, data);
timer_setup(&data->timer, pattern_trig_timer_function, 0);
led_cdev->activated = true;
if (led_cdev->flags & LED_INIT_DEFAULT_TRIGGER) {
pattern_init(led_cdev);
/*
* Mark as initialized even on pattern_init() error because
* any consecutive call to it would produce the same error.
*/
led_cdev->flags &= ~LED_INIT_DEFAULT_TRIGGER;
}
return 0;
}
static void pattern_trig_deactivate(struct led_classdev *led_cdev)
{
struct pattern_trig_data *data = led_cdev->trigger_data;
if (!led_cdev->activated)
return;
if (led_cdev->pattern_clear)
led_cdev->pattern_clear(led_cdev);
timer_shutdown_sync(&data->timer);
led_set_brightness(led_cdev, LED_OFF);
kfree(data);
led_cdev->activated = false;
}
static struct led_trigger pattern_led_trigger = {
.name = "pattern",
.activate = pattern_trig_activate,
.deactivate = pattern_trig_deactivate,
.groups = pattern_trig_groups,
};
static int __init pattern_trig_init(void)
{
return led_trigger_register(&pattern_led_trigger);
}
static void __exit pattern_trig_exit(void)
{
led_trigger_unregister(&pattern_led_trigger);
}
module_init(pattern_trig_init);
module_exit(pattern_trig_exit);
MODULE_AUTHOR("Raphael Teysseyre <[email protected]>");
MODULE_AUTHOR("Baolin Wang <[email protected]>");
MODULE_DESCRIPTION("LED Pattern trigger");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/trigger/ledtrig-pattern.c |
// SPDX-License-Identifier: GPL-2.0
#include <linux/delay.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/tty.h>
#include <uapi/linux/serial.h>
#define LEDTRIG_TTY_INTERVAL 50
struct ledtrig_tty_data {
struct led_classdev *led_cdev;
struct delayed_work dwork;
struct mutex mutex;
const char *ttyname;
struct tty_struct *tty;
int rx, tx;
};
static void ledtrig_tty_restart(struct ledtrig_tty_data *trigger_data)
{
schedule_delayed_work(&trigger_data->dwork, 0);
}
static ssize_t ttyname_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ledtrig_tty_data *trigger_data = led_trigger_get_drvdata(dev);
ssize_t len = 0;
mutex_lock(&trigger_data->mutex);
if (trigger_data->ttyname)
len = sprintf(buf, "%s\n", trigger_data->ttyname);
mutex_unlock(&trigger_data->mutex);
return len;
}
static ssize_t ttyname_store(struct device *dev,
struct device_attribute *attr, const char *buf,
size_t size)
{
struct ledtrig_tty_data *trigger_data = led_trigger_get_drvdata(dev);
char *ttyname;
ssize_t ret = size;
bool running;
if (size > 0 && buf[size - 1] == '\n')
size -= 1;
if (size) {
ttyname = kmemdup_nul(buf, size, GFP_KERNEL);
if (!ttyname)
return -ENOMEM;
} else {
ttyname = NULL;
}
mutex_lock(&trigger_data->mutex);
running = trigger_data->ttyname != NULL;
kfree(trigger_data->ttyname);
tty_kref_put(trigger_data->tty);
trigger_data->tty = NULL;
trigger_data->ttyname = ttyname;
mutex_unlock(&trigger_data->mutex);
if (ttyname && !running)
ledtrig_tty_restart(trigger_data);
return ret;
}
static DEVICE_ATTR_RW(ttyname);
static void ledtrig_tty_work(struct work_struct *work)
{
struct ledtrig_tty_data *trigger_data =
container_of(work, struct ledtrig_tty_data, dwork.work);
struct serial_icounter_struct icount;
int ret;
mutex_lock(&trigger_data->mutex);
if (!trigger_data->ttyname) {
/* exit without rescheduling */
mutex_unlock(&trigger_data->mutex);
return;
}
/* try to get the tty corresponding to $ttyname */
if (!trigger_data->tty) {
dev_t devno;
struct tty_struct *tty;
int ret;
ret = tty_dev_name_to_number(trigger_data->ttyname, &devno);
if (ret < 0)
/*
* A device with this name might appear later, so keep
* retrying.
*/
goto out;
tty = tty_kopen_shared(devno);
if (IS_ERR(tty) || !tty)
/* What to do? retry or abort */
goto out;
trigger_data->tty = tty;
}
ret = tty_get_icount(trigger_data->tty, &icount);
if (ret) {
dev_info(trigger_data->tty->dev, "Failed to get icount, stopped polling\n");
mutex_unlock(&trigger_data->mutex);
return;
}
if (icount.rx != trigger_data->rx ||
icount.tx != trigger_data->tx) {
unsigned long interval = LEDTRIG_TTY_INTERVAL;
led_blink_set_oneshot(trigger_data->led_cdev, &interval,
&interval, 0);
trigger_data->rx = icount.rx;
trigger_data->tx = icount.tx;
}
out:
mutex_unlock(&trigger_data->mutex);
schedule_delayed_work(&trigger_data->dwork,
msecs_to_jiffies(LEDTRIG_TTY_INTERVAL * 2));
}
static struct attribute *ledtrig_tty_attrs[] = {
&dev_attr_ttyname.attr,
NULL
};
ATTRIBUTE_GROUPS(ledtrig_tty);
static int ledtrig_tty_activate(struct led_classdev *led_cdev)
{
struct ledtrig_tty_data *trigger_data;
trigger_data = kzalloc(sizeof(*trigger_data), GFP_KERNEL);
if (!trigger_data)
return -ENOMEM;
led_set_trigger_data(led_cdev, trigger_data);
INIT_DELAYED_WORK(&trigger_data->dwork, ledtrig_tty_work);
trigger_data->led_cdev = led_cdev;
mutex_init(&trigger_data->mutex);
return 0;
}
static void ledtrig_tty_deactivate(struct led_classdev *led_cdev)
{
struct ledtrig_tty_data *trigger_data = led_get_trigger_data(led_cdev);
cancel_delayed_work_sync(&trigger_data->dwork);
kfree(trigger_data);
}
static struct led_trigger ledtrig_tty = {
.name = "tty",
.activate = ledtrig_tty_activate,
.deactivate = ledtrig_tty_deactivate,
.groups = ledtrig_tty_groups,
};
module_led_trigger(ledtrig_tty);
MODULE_AUTHOR("Uwe Kleine-König <[email protected]>");
MODULE_DESCRIPTION("UART LED trigger");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/trigger/ledtrig-tty.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Activity LED trigger
*
* Copyright (C) 2017 Willy Tarreau <[email protected]>
* Partially based on Atsushi Nemoto's ledtrig-heartbeat.c.
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/kernel_stat.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/panic_notifier.h>
#include <linux/reboot.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/timer.h>
#include "../leds.h"
static int panic_detected;
struct activity_data {
struct timer_list timer;
struct led_classdev *led_cdev;
u64 last_used;
u64 last_boot;
int time_left;
int state;
int invert;
};
static void led_activity_function(struct timer_list *t)
{
struct activity_data *activity_data = from_timer(activity_data, t,
timer);
struct led_classdev *led_cdev = activity_data->led_cdev;
unsigned int target;
unsigned int usage;
int delay;
u64 curr_used;
u64 curr_boot;
s32 diff_used;
s32 diff_boot;
int cpus;
int i;
if (test_and_clear_bit(LED_BLINK_BRIGHTNESS_CHANGE, &led_cdev->work_flags))
led_cdev->blink_brightness = led_cdev->new_blink_brightness;
if (unlikely(panic_detected)) {
/* full brightness in case of panic */
led_set_brightness_nosleep(led_cdev, led_cdev->blink_brightness);
return;
}
cpus = 0;
curr_used = 0;
for_each_possible_cpu(i) {
struct kernel_cpustat kcpustat;
kcpustat_cpu_fetch(&kcpustat, i);
curr_used += kcpustat.cpustat[CPUTIME_USER]
+ kcpustat.cpustat[CPUTIME_NICE]
+ kcpustat.cpustat[CPUTIME_SYSTEM]
+ kcpustat.cpustat[CPUTIME_SOFTIRQ]
+ kcpustat.cpustat[CPUTIME_IRQ];
cpus++;
}
/* We come here every 100ms in the worst case, so that's 100M ns of
* cumulated time. By dividing by 2^16, we get the time resolution
* down to 16us, ensuring we won't overflow 32-bit computations below
* even up to 3k CPUs, while keeping divides cheap on smaller systems.
*/
curr_boot = ktime_get_boottime_ns() * cpus;
diff_boot = (curr_boot - activity_data->last_boot) >> 16;
diff_used = (curr_used - activity_data->last_used) >> 16;
activity_data->last_boot = curr_boot;
activity_data->last_used = curr_used;
if (diff_boot <= 0 || diff_used < 0)
usage = 0;
else if (diff_used >= diff_boot)
usage = 100;
else
usage = 100 * diff_used / diff_boot;
/*
* Now we know the total boot_time multiplied by the number of CPUs, and
* the total idle+wait time for all CPUs. We'll compare how they evolved
* since last call. The % of overall CPU usage is :
*
* 1 - delta_idle / delta_boot
*
* What we want is that when the CPU usage is zero, the LED must blink
* slowly with very faint flashes that are detectable but not disturbing
* (typically 10ms every second, or 10ms ON, 990ms OFF). Then we want
* blinking frequency to increase up to the point where the load is
* enough to saturate one core in multi-core systems or 50% in single
* core systems. At this point it should reach 10 Hz with a 10/90 duty
* cycle (10ms ON, 90ms OFF). After this point, the blinking frequency
* remains stable (10 Hz) and only the duty cycle increases to report
* the activity, up to the point where we have 90ms ON, 10ms OFF when
* all cores are saturated. It's important that the LED never stays in
* a steady state so that it's easy to distinguish an idle or saturated
* machine from a hung one.
*
* This gives us :
* - a target CPU usage of min(50%, 100%/#CPU) for a 10% duty cycle
* (10ms ON, 90ms OFF)
* - below target :
* ON_ms = 10
* OFF_ms = 90 + (1 - usage/target) * 900
* - above target :
* ON_ms = 10 + (usage-target)/(100%-target) * 80
* OFF_ms = 90 - (usage-target)/(100%-target) * 80
*
* In order to keep a good responsiveness, we cap the sleep time to
* 100 ms and keep track of the sleep time left. This allows us to
* quickly change it if needed.
*/
activity_data->time_left -= 100;
if (activity_data->time_left <= 0) {
activity_data->time_left = 0;
activity_data->state = !activity_data->state;
led_set_brightness_nosleep(led_cdev,
(activity_data->state ^ activity_data->invert) ?
led_cdev->blink_brightness : LED_OFF);
}
target = (cpus > 1) ? (100 / cpus) : 50;
if (usage < target)
delay = activity_data->state ?
10 : /* ON */
990 - 900 * usage / target; /* OFF */
else
delay = activity_data->state ?
10 + 80 * (usage - target) / (100 - target) : /* ON */
90 - 80 * (usage - target) / (100 - target); /* OFF */
if (!activity_data->time_left || delay <= activity_data->time_left)
activity_data->time_left = delay;
delay = min_t(int, activity_data->time_left, 100);
mod_timer(&activity_data->timer, jiffies + msecs_to_jiffies(delay));
}
static ssize_t led_invert_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct activity_data *activity_data = led_trigger_get_drvdata(dev);
return sprintf(buf, "%u\n", activity_data->invert);
}
static ssize_t led_invert_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
struct activity_data *activity_data = led_trigger_get_drvdata(dev);
unsigned long state;
int ret;
ret = kstrtoul(buf, 0, &state);
if (ret)
return ret;
activity_data->invert = !!state;
return size;
}
static DEVICE_ATTR(invert, 0644, led_invert_show, led_invert_store);
static struct attribute *activity_led_attrs[] = {
&dev_attr_invert.attr,
NULL
};
ATTRIBUTE_GROUPS(activity_led);
static int activity_activate(struct led_classdev *led_cdev)
{
struct activity_data *activity_data;
activity_data = kzalloc(sizeof(*activity_data), GFP_KERNEL);
if (!activity_data)
return -ENOMEM;
led_set_trigger_data(led_cdev, activity_data);
activity_data->led_cdev = led_cdev;
timer_setup(&activity_data->timer, led_activity_function, 0);
if (!led_cdev->blink_brightness)
led_cdev->blink_brightness = led_cdev->max_brightness;
led_activity_function(&activity_data->timer);
set_bit(LED_BLINK_SW, &led_cdev->work_flags);
return 0;
}
static void activity_deactivate(struct led_classdev *led_cdev)
{
struct activity_data *activity_data = led_get_trigger_data(led_cdev);
timer_shutdown_sync(&activity_data->timer);
kfree(activity_data);
clear_bit(LED_BLINK_SW, &led_cdev->work_flags);
}
static struct led_trigger activity_led_trigger = {
.name = "activity",
.activate = activity_activate,
.deactivate = activity_deactivate,
.groups = activity_led_groups,
};
static int activity_reboot_notifier(struct notifier_block *nb,
unsigned long code, void *unused)
{
led_trigger_unregister(&activity_led_trigger);
return NOTIFY_DONE;
}
static int activity_panic_notifier(struct notifier_block *nb,
unsigned long code, void *unused)
{
panic_detected = 1;
return NOTIFY_DONE;
}
static struct notifier_block activity_reboot_nb = {
.notifier_call = activity_reboot_notifier,
};
static struct notifier_block activity_panic_nb = {
.notifier_call = activity_panic_notifier,
};
static int __init activity_init(void)
{
int rc = led_trigger_register(&activity_led_trigger);
if (!rc) {
atomic_notifier_chain_register(&panic_notifier_list,
&activity_panic_nb);
register_reboot_notifier(&activity_reboot_nb);
}
return rc;
}
static void __exit activity_exit(void)
{
unregister_reboot_notifier(&activity_reboot_nb);
atomic_notifier_chain_unregister(&panic_notifier_list,
&activity_panic_nb);
led_trigger_unregister(&activity_led_trigger);
}
module_init(activity_init);
module_exit(activity_exit);
MODULE_AUTHOR("Willy Tarreau <[email protected]>");
MODULE_DESCRIPTION("Activity LED trigger");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/trigger/ledtrig-activity.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* LED MTD trigger
*
* Copyright 2016 Ezequiel Garcia <[email protected]>
*
* Based on LED IDE-Disk Activity Trigger
*
* Copyright 2006 Openedhand Ltd.
*
* Author: Richard Purdie <[email protected]>
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/leds.h>
#define BLINK_DELAY 30
DEFINE_LED_TRIGGER(ledtrig_mtd);
DEFINE_LED_TRIGGER(ledtrig_nand);
void ledtrig_mtd_activity(void)
{
led_trigger_blink_oneshot(ledtrig_mtd, BLINK_DELAY, BLINK_DELAY, 0);
led_trigger_blink_oneshot(ledtrig_nand, BLINK_DELAY, BLINK_DELAY, 0);
}
EXPORT_SYMBOL(ledtrig_mtd_activity);
static int __init ledtrig_mtd_init(void)
{
led_trigger_register_simple("mtd", &ledtrig_mtd);
led_trigger_register_simple("nand-disk", &ledtrig_nand);
return 0;
}
device_initcall(ledtrig_mtd_init);
| linux-master | drivers/leds/trigger/ledtrig-mtd.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Kernel Panic LED Trigger
*
* Copyright 2016 Ezequiel Garcia <[email protected]>
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/notifier.h>
#include <linux/panic_notifier.h>
#include <linux/leds.h>
#include "../leds.h"
static struct led_trigger *trigger;
/*
* This is called in a special context by the atomic panic
* notifier. This means the trigger can be changed without
* worrying about locking.
*/
static void led_trigger_set_panic(struct led_classdev *led_cdev)
{
struct led_trigger *trig;
list_for_each_entry(trig, &trigger_list, next_trig) {
if (strcmp("panic", trig->name))
continue;
if (led_cdev->trigger)
list_del(&led_cdev->trig_list);
list_add_tail(&led_cdev->trig_list, &trig->led_cdevs);
/* Avoid the delayed blink path */
led_cdev->blink_delay_on = 0;
led_cdev->blink_delay_off = 0;
led_cdev->trigger = trig;
if (trig->activate)
trig->activate(led_cdev);
break;
}
}
static int led_trigger_panic_notifier(struct notifier_block *nb,
unsigned long code, void *unused)
{
struct led_classdev *led_cdev;
list_for_each_entry(led_cdev, &leds_list, node)
if (led_cdev->flags & LED_PANIC_INDICATOR)
led_trigger_set_panic(led_cdev);
return NOTIFY_DONE;
}
static struct notifier_block led_trigger_panic_nb = {
.notifier_call = led_trigger_panic_notifier,
};
static long led_panic_blink(int state)
{
led_trigger_event(trigger, state ? LED_FULL : LED_OFF);
return 0;
}
static int __init ledtrig_panic_init(void)
{
atomic_notifier_chain_register(&panic_notifier_list,
&led_trigger_panic_nb);
led_trigger_register_simple("panic", &trigger);
panic_blink = led_panic_blink;
return 0;
}
device_initcall(ledtrig_panic_init);
| linux-master | drivers/leds/trigger/ledtrig-panic.c |
// SPDX-License-Identifier: GPL-2.0
// Copyright 2017 Ben Whitten <[email protected]>
// Copyright 2007 Oliver Jowett <[email protected]>
//
// LED Kernel Netdev Trigger
//
// Toggles the LED to reflect the link and traffic state of a named net device
//
// Derived from ledtrig-timer.c which is:
// Copyright 2005-2006 Openedhand Ltd.
// Author: Richard Purdie <[email protected]>
#include <linux/atomic.h>
#include <linux/ctype.h>
#include <linux/device.h>
#include <linux/ethtool.h>
#include <linux/init.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/leds.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/mutex.h>
#include <linux/rtnetlink.h>
#include <linux/timer.h>
#include "../leds.h"
#define NETDEV_LED_DEFAULT_INTERVAL 50
/*
* Configurable sysfs attributes:
*
* device_name - network device name to monitor
* interval - duration of LED blink, in milliseconds
* link - LED's normal state reflects whether the link is up
* (has carrier) or not
* tx - LED blinks on transmitted data
* rx - LED blinks on receive data
*
*/
struct led_netdev_data {
struct mutex lock;
struct delayed_work work;
struct notifier_block notifier;
struct led_classdev *led_cdev;
struct net_device *net_dev;
char device_name[IFNAMSIZ];
atomic_t interval;
unsigned int last_activity;
unsigned long mode;
int link_speed;
u8 duplex;
bool carrier_link_up;
bool hw_control;
};
static void set_baseline_state(struct led_netdev_data *trigger_data)
{
int current_brightness;
struct led_classdev *led_cdev = trigger_data->led_cdev;
/* Already validated, hw control is possible with the requested mode */
if (trigger_data->hw_control) {
led_cdev->hw_control_set(led_cdev, trigger_data->mode);
return;
}
current_brightness = led_cdev->brightness;
if (current_brightness)
led_cdev->blink_brightness = current_brightness;
if (!led_cdev->blink_brightness)
led_cdev->blink_brightness = led_cdev->max_brightness;
if (!trigger_data->carrier_link_up) {
led_set_brightness(led_cdev, LED_OFF);
} else {
bool blink_on = false;
if (test_bit(TRIGGER_NETDEV_LINK, &trigger_data->mode))
blink_on = true;
if (test_bit(TRIGGER_NETDEV_LINK_10, &trigger_data->mode) &&
trigger_data->link_speed == SPEED_10)
blink_on = true;
if (test_bit(TRIGGER_NETDEV_LINK_100, &trigger_data->mode) &&
trigger_data->link_speed == SPEED_100)
blink_on = true;
if (test_bit(TRIGGER_NETDEV_LINK_1000, &trigger_data->mode) &&
trigger_data->link_speed == SPEED_1000)
blink_on = true;
if (test_bit(TRIGGER_NETDEV_HALF_DUPLEX, &trigger_data->mode) &&
trigger_data->duplex == DUPLEX_HALF)
blink_on = true;
if (test_bit(TRIGGER_NETDEV_FULL_DUPLEX, &trigger_data->mode) &&
trigger_data->duplex == DUPLEX_FULL)
blink_on = true;
if (blink_on)
led_set_brightness(led_cdev,
led_cdev->blink_brightness);
else
led_set_brightness(led_cdev, LED_OFF);
/* If we are looking for RX/TX start periodically
* checking stats
*/
if (test_bit(TRIGGER_NETDEV_TX, &trigger_data->mode) ||
test_bit(TRIGGER_NETDEV_RX, &trigger_data->mode))
schedule_delayed_work(&trigger_data->work, 0);
}
}
static bool supports_hw_control(struct led_classdev *led_cdev)
{
if (!led_cdev->hw_control_get || !led_cdev->hw_control_set ||
!led_cdev->hw_control_is_supported)
return false;
return !strcmp(led_cdev->hw_control_trigger, led_cdev->trigger->name);
}
/*
* Validate the configured netdev is the same as the one associated with
* the LED driver in hw control.
*/
static bool validate_net_dev(struct led_classdev *led_cdev,
struct net_device *net_dev)
{
struct device *dev = led_cdev->hw_control_get_device(led_cdev);
struct net_device *ndev;
if (!dev)
return false;
ndev = to_net_dev(dev);
return ndev == net_dev;
}
static bool can_hw_control(struct led_netdev_data *trigger_data)
{
unsigned long default_interval = msecs_to_jiffies(NETDEV_LED_DEFAULT_INTERVAL);
unsigned int interval = atomic_read(&trigger_data->interval);
struct led_classdev *led_cdev = trigger_data->led_cdev;
int ret;
if (!supports_hw_control(led_cdev))
return false;
/*
* Interval must be set to the default
* value. Any different value is rejected if in hw
* control.
*/
if (interval != default_interval)
return false;
/*
* net_dev must be set with hw control, otherwise no
* blinking can be happening and there is nothing to
* offloaded. Additionally, for hw control to be
* valid, the configured netdev must be the same as
* netdev associated to the LED.
*/
if (!validate_net_dev(led_cdev, trigger_data->net_dev))
return false;
/* Check if the requested mode is supported */
ret = led_cdev->hw_control_is_supported(led_cdev, trigger_data->mode);
/* Fall back to software blinking if not supported */
if (ret == -EOPNOTSUPP)
return false;
if (ret) {
dev_warn(led_cdev->dev,
"Current mode check failed with error %d\n", ret);
return false;
}
return true;
}
static void get_device_state(struct led_netdev_data *trigger_data)
{
struct ethtool_link_ksettings cmd;
trigger_data->carrier_link_up = netif_carrier_ok(trigger_data->net_dev);
if (!trigger_data->carrier_link_up)
return;
if (!__ethtool_get_link_ksettings(trigger_data->net_dev, &cmd)) {
trigger_data->link_speed = cmd.base.speed;
trigger_data->duplex = cmd.base.duplex;
}
}
static ssize_t device_name_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct led_netdev_data *trigger_data = led_trigger_get_drvdata(dev);
ssize_t len;
mutex_lock(&trigger_data->lock);
len = sprintf(buf, "%s\n", trigger_data->device_name);
mutex_unlock(&trigger_data->lock);
return len;
}
static int set_device_name(struct led_netdev_data *trigger_data,
const char *name, size_t size)
{
cancel_delayed_work_sync(&trigger_data->work);
mutex_lock(&trigger_data->lock);
if (trigger_data->net_dev) {
dev_put(trigger_data->net_dev);
trigger_data->net_dev = NULL;
}
memcpy(trigger_data->device_name, name, size);
trigger_data->device_name[size] = 0;
if (size > 0 && trigger_data->device_name[size - 1] == '\n')
trigger_data->device_name[size - 1] = 0;
if (trigger_data->device_name[0] != 0)
trigger_data->net_dev =
dev_get_by_name(&init_net, trigger_data->device_name);
trigger_data->carrier_link_up = false;
trigger_data->link_speed = SPEED_UNKNOWN;
trigger_data->duplex = DUPLEX_UNKNOWN;
if (trigger_data->net_dev != NULL) {
rtnl_lock();
get_device_state(trigger_data);
rtnl_unlock();
}
trigger_data->last_activity = 0;
set_baseline_state(trigger_data);
mutex_unlock(&trigger_data->lock);
return 0;
}
static ssize_t device_name_store(struct device *dev,
struct device_attribute *attr, const char *buf,
size_t size)
{
struct led_netdev_data *trigger_data = led_trigger_get_drvdata(dev);
int ret;
if (size >= IFNAMSIZ)
return -EINVAL;
ret = set_device_name(trigger_data, buf, size);
if (ret < 0)
return ret;
return size;
}
static DEVICE_ATTR_RW(device_name);
static ssize_t netdev_led_attr_show(struct device *dev, char *buf,
enum led_trigger_netdev_modes attr)
{
struct led_netdev_data *trigger_data = led_trigger_get_drvdata(dev);
int bit;
switch (attr) {
case TRIGGER_NETDEV_LINK:
case TRIGGER_NETDEV_LINK_10:
case TRIGGER_NETDEV_LINK_100:
case TRIGGER_NETDEV_LINK_1000:
case TRIGGER_NETDEV_HALF_DUPLEX:
case TRIGGER_NETDEV_FULL_DUPLEX:
case TRIGGER_NETDEV_TX:
case TRIGGER_NETDEV_RX:
bit = attr;
break;
default:
return -EINVAL;
}
return sprintf(buf, "%u\n", test_bit(bit, &trigger_data->mode));
}
static ssize_t netdev_led_attr_store(struct device *dev, const char *buf,
size_t size, enum led_trigger_netdev_modes attr)
{
struct led_netdev_data *trigger_data = led_trigger_get_drvdata(dev);
unsigned long state, mode = trigger_data->mode;
int ret;
int bit;
ret = kstrtoul(buf, 0, &state);
if (ret)
return ret;
switch (attr) {
case TRIGGER_NETDEV_LINK:
case TRIGGER_NETDEV_LINK_10:
case TRIGGER_NETDEV_LINK_100:
case TRIGGER_NETDEV_LINK_1000:
case TRIGGER_NETDEV_HALF_DUPLEX:
case TRIGGER_NETDEV_FULL_DUPLEX:
case TRIGGER_NETDEV_TX:
case TRIGGER_NETDEV_RX:
bit = attr;
break;
default:
return -EINVAL;
}
if (state)
set_bit(bit, &mode);
else
clear_bit(bit, &mode);
if (test_bit(TRIGGER_NETDEV_LINK, &mode) &&
(test_bit(TRIGGER_NETDEV_LINK_10, &mode) ||
test_bit(TRIGGER_NETDEV_LINK_100, &mode) ||
test_bit(TRIGGER_NETDEV_LINK_1000, &mode)))
return -EINVAL;
cancel_delayed_work_sync(&trigger_data->work);
trigger_data->mode = mode;
trigger_data->hw_control = can_hw_control(trigger_data);
set_baseline_state(trigger_data);
return size;
}
#define DEFINE_NETDEV_TRIGGER(trigger_name, trigger) \
static ssize_t trigger_name##_show(struct device *dev, \
struct device_attribute *attr, char *buf) \
{ \
return netdev_led_attr_show(dev, buf, trigger); \
} \
static ssize_t trigger_name##_store(struct device *dev, \
struct device_attribute *attr, const char *buf, size_t size) \
{ \
return netdev_led_attr_store(dev, buf, size, trigger); \
} \
static DEVICE_ATTR_RW(trigger_name)
DEFINE_NETDEV_TRIGGER(link, TRIGGER_NETDEV_LINK);
DEFINE_NETDEV_TRIGGER(link_10, TRIGGER_NETDEV_LINK_10);
DEFINE_NETDEV_TRIGGER(link_100, TRIGGER_NETDEV_LINK_100);
DEFINE_NETDEV_TRIGGER(link_1000, TRIGGER_NETDEV_LINK_1000);
DEFINE_NETDEV_TRIGGER(half_duplex, TRIGGER_NETDEV_HALF_DUPLEX);
DEFINE_NETDEV_TRIGGER(full_duplex, TRIGGER_NETDEV_FULL_DUPLEX);
DEFINE_NETDEV_TRIGGER(tx, TRIGGER_NETDEV_TX);
DEFINE_NETDEV_TRIGGER(rx, TRIGGER_NETDEV_RX);
static ssize_t interval_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct led_netdev_data *trigger_data = led_trigger_get_drvdata(dev);
return sprintf(buf, "%u\n",
jiffies_to_msecs(atomic_read(&trigger_data->interval)));
}
static ssize_t interval_store(struct device *dev,
struct device_attribute *attr, const char *buf,
size_t size)
{
struct led_netdev_data *trigger_data = led_trigger_get_drvdata(dev);
unsigned long value;
int ret;
if (trigger_data->hw_control)
return -EINVAL;
ret = kstrtoul(buf, 0, &value);
if (ret)
return ret;
/* impose some basic bounds on the timer interval */
if (value >= 5 && value <= 10000) {
cancel_delayed_work_sync(&trigger_data->work);
atomic_set(&trigger_data->interval, msecs_to_jiffies(value));
set_baseline_state(trigger_data); /* resets timer */
}
return size;
}
static DEVICE_ATTR_RW(interval);
static ssize_t offloaded_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct led_netdev_data *trigger_data = led_trigger_get_drvdata(dev);
return sprintf(buf, "%d\n", trigger_data->hw_control);
}
static DEVICE_ATTR_RO(offloaded);
static struct attribute *netdev_trig_attrs[] = {
&dev_attr_device_name.attr,
&dev_attr_link.attr,
&dev_attr_link_10.attr,
&dev_attr_link_100.attr,
&dev_attr_link_1000.attr,
&dev_attr_full_duplex.attr,
&dev_attr_half_duplex.attr,
&dev_attr_rx.attr,
&dev_attr_tx.attr,
&dev_attr_interval.attr,
&dev_attr_offloaded.attr,
NULL
};
ATTRIBUTE_GROUPS(netdev_trig);
static int netdev_trig_notify(struct notifier_block *nb,
unsigned long evt, void *dv)
{
struct net_device *dev =
netdev_notifier_info_to_dev((struct netdev_notifier_info *)dv);
struct led_netdev_data *trigger_data =
container_of(nb, struct led_netdev_data, notifier);
if (evt != NETDEV_UP && evt != NETDEV_DOWN && evt != NETDEV_CHANGE
&& evt != NETDEV_REGISTER && evt != NETDEV_UNREGISTER
&& evt != NETDEV_CHANGENAME)
return NOTIFY_DONE;
if (!(dev == trigger_data->net_dev ||
(evt == NETDEV_CHANGENAME && !strcmp(dev->name, trigger_data->device_name)) ||
(evt == NETDEV_REGISTER && !strcmp(dev->name, trigger_data->device_name))))
return NOTIFY_DONE;
cancel_delayed_work_sync(&trigger_data->work);
mutex_lock(&trigger_data->lock);
trigger_data->carrier_link_up = false;
trigger_data->link_speed = SPEED_UNKNOWN;
trigger_data->duplex = DUPLEX_UNKNOWN;
switch (evt) {
case NETDEV_CHANGENAME:
get_device_state(trigger_data);
fallthrough;
case NETDEV_REGISTER:
dev_put(trigger_data->net_dev);
dev_hold(dev);
trigger_data->net_dev = dev;
break;
case NETDEV_UNREGISTER:
dev_put(trigger_data->net_dev);
trigger_data->net_dev = NULL;
break;
case NETDEV_UP:
case NETDEV_CHANGE:
get_device_state(trigger_data);
break;
}
set_baseline_state(trigger_data);
mutex_unlock(&trigger_data->lock);
return NOTIFY_DONE;
}
/* here's the real work! */
static void netdev_trig_work(struct work_struct *work)
{
struct led_netdev_data *trigger_data =
container_of(work, struct led_netdev_data, work.work);
struct rtnl_link_stats64 *dev_stats;
unsigned int new_activity;
struct rtnl_link_stats64 temp;
unsigned long interval;
int invert;
/* If we dont have a device, insure we are off */
if (!trigger_data->net_dev) {
led_set_brightness(trigger_data->led_cdev, LED_OFF);
return;
}
/* If we are not looking for RX/TX then return */
if (!test_bit(TRIGGER_NETDEV_TX, &trigger_data->mode) &&
!test_bit(TRIGGER_NETDEV_RX, &trigger_data->mode))
return;
dev_stats = dev_get_stats(trigger_data->net_dev, &temp);
new_activity =
(test_bit(TRIGGER_NETDEV_TX, &trigger_data->mode) ?
dev_stats->tx_packets : 0) +
(test_bit(TRIGGER_NETDEV_RX, &trigger_data->mode) ?
dev_stats->rx_packets : 0);
if (trigger_data->last_activity != new_activity) {
led_stop_software_blink(trigger_data->led_cdev);
invert = test_bit(TRIGGER_NETDEV_LINK, &trigger_data->mode) ||
test_bit(TRIGGER_NETDEV_LINK_10, &trigger_data->mode) ||
test_bit(TRIGGER_NETDEV_LINK_100, &trigger_data->mode) ||
test_bit(TRIGGER_NETDEV_LINK_1000, &trigger_data->mode) ||
test_bit(TRIGGER_NETDEV_HALF_DUPLEX, &trigger_data->mode) ||
test_bit(TRIGGER_NETDEV_FULL_DUPLEX, &trigger_data->mode);
interval = jiffies_to_msecs(
atomic_read(&trigger_data->interval));
/* base state is ON (link present) */
led_blink_set_oneshot(trigger_data->led_cdev,
&interval,
&interval,
invert);
trigger_data->last_activity = new_activity;
}
schedule_delayed_work(&trigger_data->work,
(atomic_read(&trigger_data->interval)*2));
}
static int netdev_trig_activate(struct led_classdev *led_cdev)
{
struct led_netdev_data *trigger_data;
unsigned long mode = 0;
struct device *dev;
int rc;
trigger_data = kzalloc(sizeof(struct led_netdev_data), GFP_KERNEL);
if (!trigger_data)
return -ENOMEM;
mutex_init(&trigger_data->lock);
trigger_data->notifier.notifier_call = netdev_trig_notify;
trigger_data->notifier.priority = 10;
INIT_DELAYED_WORK(&trigger_data->work, netdev_trig_work);
trigger_data->led_cdev = led_cdev;
trigger_data->net_dev = NULL;
trigger_data->device_name[0] = 0;
trigger_data->mode = 0;
atomic_set(&trigger_data->interval, msecs_to_jiffies(NETDEV_LED_DEFAULT_INTERVAL));
trigger_data->last_activity = 0;
/* Check if hw control is active by default on the LED.
* Init already enabled mode in hw control.
*/
if (supports_hw_control(led_cdev)) {
dev = led_cdev->hw_control_get_device(led_cdev);
if (dev) {
const char *name = dev_name(dev);
set_device_name(trigger_data, name, strlen(name));
trigger_data->hw_control = true;
rc = led_cdev->hw_control_get(led_cdev, &mode);
if (!rc)
trigger_data->mode = mode;
}
}
led_set_trigger_data(led_cdev, trigger_data);
rc = register_netdevice_notifier(&trigger_data->notifier);
if (rc)
kfree(trigger_data);
return rc;
}
static void netdev_trig_deactivate(struct led_classdev *led_cdev)
{
struct led_netdev_data *trigger_data = led_get_trigger_data(led_cdev);
unregister_netdevice_notifier(&trigger_data->notifier);
cancel_delayed_work_sync(&trigger_data->work);
led_set_brightness(led_cdev, LED_OFF);
dev_put(trigger_data->net_dev);
kfree(trigger_data);
}
static struct led_trigger netdev_led_trigger = {
.name = "netdev",
.activate = netdev_trig_activate,
.deactivate = netdev_trig_deactivate,
.groups = netdev_trig_groups,
};
module_led_trigger(netdev_led_trigger);
MODULE_AUTHOR("Ben Whitten <[email protected]>");
MODULE_AUTHOR("Oliver Jowett <[email protected]>");
MODULE_DESCRIPTION("Netdev LED trigger");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/trigger/ledtrig-netdev.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Camera Flash and Torch On/Off Trigger
*
* based on ledtrig-ide-disk.c
*
* Copyright 2013 Texas Instruments
*
* Author: Milo(Woogyom) Kim <[email protected]>
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/leds.h>
DEFINE_LED_TRIGGER(ledtrig_flash);
DEFINE_LED_TRIGGER(ledtrig_torch);
void ledtrig_flash_ctrl(bool on)
{
enum led_brightness brt = on ? LED_FULL : LED_OFF;
led_trigger_event(ledtrig_flash, brt);
}
EXPORT_SYMBOL_GPL(ledtrig_flash_ctrl);
void ledtrig_torch_ctrl(bool on)
{
enum led_brightness brt = on ? LED_FULL : LED_OFF;
led_trigger_event(ledtrig_torch, brt);
}
EXPORT_SYMBOL_GPL(ledtrig_torch_ctrl);
static int __init ledtrig_camera_init(void)
{
led_trigger_register_simple("flash", &ledtrig_flash);
led_trigger_register_simple("torch", &ledtrig_torch);
return 0;
}
module_init(ledtrig_camera_init);
static void __exit ledtrig_camera_exit(void)
{
led_trigger_unregister_simple(ledtrig_torch);
led_trigger_unregister_simple(ledtrig_flash);
}
module_exit(ledtrig_camera_exit);
MODULE_DESCRIPTION("LED Trigger for Camera Flash/Torch Control");
MODULE_AUTHOR("Milo Kim");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/trigger/ledtrig-camera.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* ledtrig-cpu.c - LED trigger based on CPU activity
*
* This LED trigger will be registered for first 8 CPUs and named
* as cpu0..cpu7. There's additional trigger called cpu that
* is on when any CPU is active.
*
* If you want support for arbitrary number of CPUs, make it one trigger,
* with additional sysfs file selecting which CPU to watch.
*
* It can be bound to any LED just like other triggers using either a
* board file or via sysfs interface.
*
* An API named ledtrig_cpu is exported for any user, who want to add CPU
* activity indication in their code.
*
* Copyright 2011 Linus Walleij <[email protected]>
* Copyright 2011 - 2012 Bryan Wu <[email protected]>
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/percpu.h>
#include <linux/syscore_ops.h>
#include <linux/rwsem.h>
#include <linux/cpu.h>
#include "../leds.h"
#define MAX_NAME_LEN 8
struct led_trigger_cpu {
bool is_active;
char name[MAX_NAME_LEN];
struct led_trigger *_trig;
};
static DEFINE_PER_CPU(struct led_trigger_cpu, cpu_trig);
static struct led_trigger *trig_cpu_all;
static atomic_t num_active_cpus = ATOMIC_INIT(0);
/**
* ledtrig_cpu - emit a CPU event as a trigger
* @ledevt: CPU event to be emitted
*
* Emit a CPU event on a CPU core, which will trigger a
* bound LED to turn on or turn off.
*/
void ledtrig_cpu(enum cpu_led_event ledevt)
{
struct led_trigger_cpu *trig = this_cpu_ptr(&cpu_trig);
bool is_active = trig->is_active;
/* Locate the correct CPU LED */
switch (ledevt) {
case CPU_LED_IDLE_END:
case CPU_LED_START:
/* Will turn the LED on, max brightness */
is_active = true;
break;
case CPU_LED_IDLE_START:
case CPU_LED_STOP:
case CPU_LED_HALTED:
/* Will turn the LED off */
is_active = false;
break;
default:
/* Will leave the LED as it is */
break;
}
if (is_active != trig->is_active) {
unsigned int active_cpus;
unsigned int total_cpus;
/* Update trigger state */
trig->is_active = is_active;
atomic_add(is_active ? 1 : -1, &num_active_cpus);
active_cpus = atomic_read(&num_active_cpus);
total_cpus = num_present_cpus();
led_trigger_event(trig->_trig,
is_active ? LED_FULL : LED_OFF);
led_trigger_event(trig_cpu_all,
DIV_ROUND_UP(LED_FULL * active_cpus, total_cpus));
}
}
EXPORT_SYMBOL(ledtrig_cpu);
static int ledtrig_cpu_syscore_suspend(void)
{
ledtrig_cpu(CPU_LED_STOP);
return 0;
}
static void ledtrig_cpu_syscore_resume(void)
{
ledtrig_cpu(CPU_LED_START);
}
static void ledtrig_cpu_syscore_shutdown(void)
{
ledtrig_cpu(CPU_LED_HALTED);
}
static struct syscore_ops ledtrig_cpu_syscore_ops = {
.shutdown = ledtrig_cpu_syscore_shutdown,
.suspend = ledtrig_cpu_syscore_suspend,
.resume = ledtrig_cpu_syscore_resume,
};
static int ledtrig_online_cpu(unsigned int cpu)
{
ledtrig_cpu(CPU_LED_START);
return 0;
}
static int ledtrig_prepare_down_cpu(unsigned int cpu)
{
ledtrig_cpu(CPU_LED_STOP);
return 0;
}
static int __init ledtrig_cpu_init(void)
{
int cpu;
int ret;
/* Supports up to 9999 cpu cores */
BUILD_BUG_ON(CONFIG_NR_CPUS > 9999);
/*
* Registering a trigger for all CPUs.
*/
led_trigger_register_simple("cpu", &trig_cpu_all);
/*
* Registering CPU led trigger for each CPU core here
* ignores CPU hotplug, but after this CPU hotplug works
* fine with this trigger.
*/
for_each_possible_cpu(cpu) {
struct led_trigger_cpu *trig = &per_cpu(cpu_trig, cpu);
if (cpu >= 8)
continue;
snprintf(trig->name, MAX_NAME_LEN, "cpu%d", cpu);
led_trigger_register_simple(trig->name, &trig->_trig);
}
register_syscore_ops(&ledtrig_cpu_syscore_ops);
ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "leds/trigger:starting",
ledtrig_online_cpu, ledtrig_prepare_down_cpu);
if (ret < 0)
pr_err("CPU hotplug notifier for ledtrig-cpu could not be registered: %d\n",
ret);
pr_info("ledtrig-cpu: registered to indicate activity on CPUs\n");
return 0;
}
device_initcall(ledtrig_cpu_init);
| linux-master | drivers/leds/trigger/ledtrig-cpu.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* LED Disk Activity Trigger
*
* Copyright 2006 Openedhand Ltd.
*
* Author: Richard Purdie <[email protected]>
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/leds.h>
#define BLINK_DELAY 30
DEFINE_LED_TRIGGER(ledtrig_disk);
DEFINE_LED_TRIGGER(ledtrig_disk_read);
DEFINE_LED_TRIGGER(ledtrig_disk_write);
void ledtrig_disk_activity(bool write)
{
led_trigger_blink_oneshot(ledtrig_disk, BLINK_DELAY, BLINK_DELAY, 0);
if (write)
led_trigger_blink_oneshot(ledtrig_disk_write,
BLINK_DELAY, BLINK_DELAY, 0);
else
led_trigger_blink_oneshot(ledtrig_disk_read,
BLINK_DELAY, BLINK_DELAY, 0);
}
EXPORT_SYMBOL(ledtrig_disk_activity);
static int __init ledtrig_disk_init(void)
{
led_trigger_register_simple("disk-activity", &ledtrig_disk);
led_trigger_register_simple("disk-read", &ledtrig_disk_read);
led_trigger_register_simple("disk-write", &ledtrig_disk_write);
return 0;
}
device_initcall(ledtrig_disk_init);
| linux-master | drivers/leds/trigger/ledtrig-disk.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* LED Kernel Timer Trigger
*
* Copyright 2005-2006 Openedhand Ltd.
*
* Author: Richard Purdie <[email protected]>
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/ctype.h>
#include <linux/slab.h>
#include <linux/leds.h>
static ssize_t led_delay_on_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct led_classdev *led_cdev = led_trigger_get_led(dev);
return sprintf(buf, "%lu\n", led_cdev->blink_delay_on);
}
static ssize_t led_delay_on_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t size)
{
struct led_classdev *led_cdev = led_trigger_get_led(dev);
unsigned long state;
ssize_t ret;
ret = kstrtoul(buf, 10, &state);
if (ret)
return ret;
led_blink_set(led_cdev, &state, &led_cdev->blink_delay_off);
led_cdev->blink_delay_on = state;
return size;
}
static ssize_t led_delay_off_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct led_classdev *led_cdev = led_trigger_get_led(dev);
return sprintf(buf, "%lu\n", led_cdev->blink_delay_off);
}
static ssize_t led_delay_off_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t size)
{
struct led_classdev *led_cdev = led_trigger_get_led(dev);
unsigned long state;
ssize_t ret;
ret = kstrtoul(buf, 10, &state);
if (ret)
return ret;
led_blink_set(led_cdev, &led_cdev->blink_delay_on, &state);
led_cdev->blink_delay_off = state;
return size;
}
static DEVICE_ATTR(delay_on, 0644, led_delay_on_show, led_delay_on_store);
static DEVICE_ATTR(delay_off, 0644, led_delay_off_show, led_delay_off_store);
static struct attribute *timer_trig_attrs[] = {
&dev_attr_delay_on.attr,
&dev_attr_delay_off.attr,
NULL
};
ATTRIBUTE_GROUPS(timer_trig);
static void pattern_init(struct led_classdev *led_cdev)
{
u32 *pattern;
unsigned int size = 0;
pattern = led_get_default_pattern(led_cdev, &size);
if (!pattern)
return;
if (size != 2) {
dev_warn(led_cdev->dev,
"Expected 2 but got %u values for delays pattern\n",
size);
goto out;
}
led_cdev->blink_delay_on = pattern[0];
led_cdev->blink_delay_off = pattern[1];
/* led_blink_set() called by caller */
out:
kfree(pattern);
}
static int timer_trig_activate(struct led_classdev *led_cdev)
{
if (led_cdev->flags & LED_INIT_DEFAULT_TRIGGER) {
pattern_init(led_cdev);
/*
* Mark as initialized even on pattern_init() error because
* any consecutive call to it would produce the same error.
*/
led_cdev->flags &= ~LED_INIT_DEFAULT_TRIGGER;
}
/*
* If "set brightness to 0" is pending in workqueue, we don't
* want that to be reordered after blink_set()
*/
flush_work(&led_cdev->set_brightness_work);
led_blink_set(led_cdev, &led_cdev->blink_delay_on,
&led_cdev->blink_delay_off);
return 0;
}
static void timer_trig_deactivate(struct led_classdev *led_cdev)
{
/* Stop blinking */
led_set_brightness(led_cdev, LED_OFF);
}
static struct led_trigger timer_led_trigger = {
.name = "timer",
.activate = timer_trig_activate,
.deactivate = timer_trig_deactivate,
.groups = timer_trig_groups,
};
module_led_trigger(timer_led_trigger);
MODULE_AUTHOR("Richard Purdie <[email protected]>");
MODULE_DESCRIPTION("Timer LED trigger");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/trigger/ledtrig-timer.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Backlight emulation LED trigger
*
* Copyright 2008 (C) Rodolfo Giometti <[email protected]>
* Copyright 2008 (C) Eurotech S.p.A. <[email protected]>
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/fb.h>
#include <linux/leds.h>
#include "../leds.h"
#define BLANK 1
#define UNBLANK 0
struct bl_trig_notifier {
struct led_classdev *led;
int brightness;
int old_status;
struct notifier_block notifier;
unsigned invert;
};
static int fb_notifier_callback(struct notifier_block *p,
unsigned long event, void *data)
{
struct bl_trig_notifier *n = container_of(p,
struct bl_trig_notifier, notifier);
struct led_classdev *led = n->led;
struct fb_event *fb_event = data;
int *blank;
int new_status;
/* If we aren't interested in this event, skip it immediately ... */
if (event != FB_EVENT_BLANK)
return 0;
blank = fb_event->data;
new_status = *blank ? BLANK : UNBLANK;
if (new_status == n->old_status)
return 0;
if ((n->old_status == UNBLANK) ^ n->invert) {
n->brightness = led->brightness;
led_set_brightness_nosleep(led, LED_OFF);
} else {
led_set_brightness_nosleep(led, n->brightness);
}
n->old_status = new_status;
return 0;
}
static ssize_t bl_trig_invert_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct bl_trig_notifier *n = led_trigger_get_drvdata(dev);
return sprintf(buf, "%u\n", n->invert);
}
static ssize_t bl_trig_invert_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t num)
{
struct led_classdev *led = led_trigger_get_led(dev);
struct bl_trig_notifier *n = led_trigger_get_drvdata(dev);
unsigned long invert;
int ret;
ret = kstrtoul(buf, 10, &invert);
if (ret < 0)
return ret;
if (invert > 1)
return -EINVAL;
n->invert = invert;
/* After inverting, we need to update the LED. */
if ((n->old_status == BLANK) ^ n->invert)
led_set_brightness_nosleep(led, LED_OFF);
else
led_set_brightness_nosleep(led, n->brightness);
return num;
}
static DEVICE_ATTR(inverted, 0644, bl_trig_invert_show, bl_trig_invert_store);
static struct attribute *bl_trig_attrs[] = {
&dev_attr_inverted.attr,
NULL,
};
ATTRIBUTE_GROUPS(bl_trig);
static int bl_trig_activate(struct led_classdev *led)
{
int ret;
struct bl_trig_notifier *n;
n = kzalloc(sizeof(struct bl_trig_notifier), GFP_KERNEL);
if (!n)
return -ENOMEM;
led_set_trigger_data(led, n);
n->led = led;
n->brightness = led->brightness;
n->old_status = UNBLANK;
n->notifier.notifier_call = fb_notifier_callback;
ret = fb_register_client(&n->notifier);
if (ret)
dev_err(led->dev, "unable to register backlight trigger\n");
return 0;
}
static void bl_trig_deactivate(struct led_classdev *led)
{
struct bl_trig_notifier *n = led_get_trigger_data(led);
fb_unregister_client(&n->notifier);
kfree(n);
}
static struct led_trigger bl_led_trigger = {
.name = "backlight",
.activate = bl_trig_activate,
.deactivate = bl_trig_deactivate,
.groups = bl_trig_groups,
};
module_led_trigger(bl_led_trigger);
MODULE_AUTHOR("Rodolfo Giometti <[email protected]>");
MODULE_DESCRIPTION("Backlight emulation LED trigger");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/trigger/ledtrig-backlight.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2017-2022 Linaro Ltd
* Copyright (c) 2010-2012, The Linux Foundation. All rights reserved.
* Copyright (c) 2023, Qualcomm Innovation Center, Inc. All rights reserved.
*/
#include <linux/bits.h>
#include <linux/bitfield.h>
#include <linux/led-class-multicolor.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pwm.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#define LPG_SUBTYPE_REG 0x05
#define LPG_SUBTYPE_LPG 0x2
#define LPG_SUBTYPE_PWM 0xb
#define LPG_SUBTYPE_HI_RES_PWM 0xc
#define LPG_SUBTYPE_LPG_LITE 0x11
#define LPG_PATTERN_CONFIG_REG 0x40
#define LPG_SIZE_CLK_REG 0x41
#define PWM_CLK_SELECT_MASK GENMASK(1, 0)
#define PWM_CLK_SELECT_HI_RES_MASK GENMASK(2, 0)
#define PWM_SIZE_HI_RES_MASK GENMASK(6, 4)
#define LPG_PREDIV_CLK_REG 0x42
#define PWM_FREQ_PRE_DIV_MASK GENMASK(6, 5)
#define PWM_FREQ_EXP_MASK GENMASK(2, 0)
#define PWM_TYPE_CONFIG_REG 0x43
#define PWM_VALUE_REG 0x44
#define PWM_ENABLE_CONTROL_REG 0x46
#define PWM_SYNC_REG 0x47
#define LPG_RAMP_DURATION_REG 0x50
#define LPG_HI_PAUSE_REG 0x52
#define LPG_LO_PAUSE_REG 0x54
#define LPG_HI_IDX_REG 0x56
#define LPG_LO_IDX_REG 0x57
#define PWM_SEC_ACCESS_REG 0xd0
#define PWM_DTEST_REG(x) (0xe2 + (x) - 1)
#define TRI_LED_SRC_SEL 0x45
#define TRI_LED_EN_CTL 0x46
#define TRI_LED_ATC_CTL 0x47
#define LPG_LUT_REG(x) (0x40 + (x) * 2)
#define RAMP_CONTROL_REG 0xc8
#define LPG_RESOLUTION_9BIT BIT(9)
#define LPG_RESOLUTION_15BIT BIT(15)
#define LPG_MAX_M 7
#define LPG_MAX_PREDIV 6
struct lpg_channel;
struct lpg_data;
/**
* struct lpg - LPG device context
* @dev: pointer to LPG device
* @map: regmap for register access
* @lock: used to synchronize LED and pwm callback requests
* @pwm: PWM-chip object, if operating in PWM mode
* @data: reference to version specific data
* @lut_base: base address of the LUT block (optional)
* @lut_size: number of entries in the LUT block
* @lut_bitmap: allocation bitmap for LUT entries
* @triled_base: base address of the TRILED block (optional)
* @triled_src: power-source for the TRILED
* @triled_has_atc_ctl: true if there is TRI_LED_ATC_CTL register
* @triled_has_src_sel: true if there is TRI_LED_SRC_SEL register
* @channels: list of PWM channels
* @num_channels: number of @channels
*/
struct lpg {
struct device *dev;
struct regmap *map;
struct mutex lock;
struct pwm_chip pwm;
const struct lpg_data *data;
u32 lut_base;
u32 lut_size;
unsigned long *lut_bitmap;
u32 triled_base;
u32 triled_src;
bool triled_has_atc_ctl;
bool triled_has_src_sel;
struct lpg_channel *channels;
unsigned int num_channels;
};
/**
* struct lpg_channel - per channel data
* @lpg: reference to parent lpg
* @base: base address of the PWM channel
* @triled_mask: mask in TRILED to enable this channel
* @lut_mask: mask in LUT to start pattern generator for this channel
* @subtype: PMIC hardware block subtype
* @in_use: channel is exposed to LED framework
* @color: color of the LED attached to this channel
* @dtest_line: DTEST line for output, or 0 if disabled
* @dtest_value: DTEST line configuration
* @pwm_value: duty (in microseconds) of the generated pulses, overridden by LUT
* @enabled: output enabled?
* @period: period (in nanoseconds) of the generated pulses
* @clk_sel: reference clock frequency selector
* @pre_div_sel: divider selector of the reference clock
* @pre_div_exp: exponential divider of the reference clock
* @pwm_resolution_sel: pwm resolution selector
* @ramp_enabled: duty cycle is driven by iterating over lookup table
* @ramp_ping_pong: reverse through pattern, rather than wrapping to start
* @ramp_oneshot: perform only a single pass over the pattern
* @ramp_reverse: iterate over pattern backwards
* @ramp_tick_ms: length (in milliseconds) of one step in the pattern
* @ramp_lo_pause_ms: pause (in milliseconds) before iterating over pattern
* @ramp_hi_pause_ms: pause (in milliseconds) after iterating over pattern
* @pattern_lo_idx: start index of associated pattern
* @pattern_hi_idx: last index of associated pattern
*/
struct lpg_channel {
struct lpg *lpg;
u32 base;
unsigned int triled_mask;
unsigned int lut_mask;
unsigned int subtype;
bool in_use;
int color;
u32 dtest_line;
u32 dtest_value;
u16 pwm_value;
bool enabled;
u64 period;
unsigned int clk_sel;
unsigned int pre_div_sel;
unsigned int pre_div_exp;
unsigned int pwm_resolution_sel;
bool ramp_enabled;
bool ramp_ping_pong;
bool ramp_oneshot;
bool ramp_reverse;
unsigned short ramp_tick_ms;
unsigned long ramp_lo_pause_ms;
unsigned long ramp_hi_pause_ms;
unsigned int pattern_lo_idx;
unsigned int pattern_hi_idx;
};
/**
* struct lpg_led - logical LED object
* @lpg: lpg context reference
* @cdev: LED class device
* @mcdev: Multicolor LED class device
* @num_channels: number of @channels
* @channels: list of channels associated with the LED
*/
struct lpg_led {
struct lpg *lpg;
struct led_classdev cdev;
struct led_classdev_mc mcdev;
unsigned int num_channels;
struct lpg_channel *channels[];
};
/**
* struct lpg_channel_data - per channel initialization data
* @base: base address for PWM channel registers
* @triled_mask: bitmask for controlling this channel in TRILED
*/
struct lpg_channel_data {
unsigned int base;
u8 triled_mask;
};
/**
* struct lpg_data - initialization data
* @lut_base: base address of LUT block
* @lut_size: number of entries in LUT
* @triled_base: base address of TRILED
* @triled_has_atc_ctl: true if there is TRI_LED_ATC_CTL register
* @triled_has_src_sel: true if there is TRI_LED_SRC_SEL register
* @num_channels: number of channels in LPG
* @channels: list of channel initialization data
*/
struct lpg_data {
unsigned int lut_base;
unsigned int lut_size;
unsigned int triled_base;
bool triled_has_atc_ctl;
bool triled_has_src_sel;
int num_channels;
const struct lpg_channel_data *channels;
};
static int triled_set(struct lpg *lpg, unsigned int mask, unsigned int enable)
{
/* Skip if we don't have a triled block */
if (!lpg->triled_base)
return 0;
return regmap_update_bits(lpg->map, lpg->triled_base + TRI_LED_EN_CTL,
mask, enable);
}
static int lpg_lut_store(struct lpg *lpg, struct led_pattern *pattern,
size_t len, unsigned int *lo_idx, unsigned int *hi_idx)
{
unsigned int idx;
u16 val;
int i;
idx = bitmap_find_next_zero_area(lpg->lut_bitmap, lpg->lut_size,
0, len, 0);
if (idx >= lpg->lut_size)
return -ENOMEM;
for (i = 0; i < len; i++) {
val = pattern[i].brightness;
regmap_bulk_write(lpg->map, lpg->lut_base + LPG_LUT_REG(idx + i),
&val, sizeof(val));
}
bitmap_set(lpg->lut_bitmap, idx, len);
*lo_idx = idx;
*hi_idx = idx + len - 1;
return 0;
}
static void lpg_lut_free(struct lpg *lpg, unsigned int lo_idx, unsigned int hi_idx)
{
int len;
len = hi_idx - lo_idx + 1;
if (len == 1)
return;
bitmap_clear(lpg->lut_bitmap, lo_idx, len);
}
static int lpg_lut_sync(struct lpg *lpg, unsigned int mask)
{
return regmap_write(lpg->map, lpg->lut_base + RAMP_CONTROL_REG, mask);
}
static const unsigned int lpg_clk_rates[] = {0, 1024, 32768, 19200000};
static const unsigned int lpg_clk_rates_hi_res[] = {0, 1024, 32768, 19200000, 76800000};
static const unsigned int lpg_pre_divs[] = {1, 3, 5, 6};
static const unsigned int lpg_pwm_resolution[] = {9};
static const unsigned int lpg_pwm_resolution_hi_res[] = {8, 9, 10, 11, 12, 13, 14, 15};
static int lpg_calc_freq(struct lpg_channel *chan, uint64_t period)
{
unsigned int i, pwm_resolution_count, best_pwm_resolution_sel = 0;
const unsigned int *clk_rate_arr, *pwm_resolution_arr;
unsigned int clk_sel, clk_len, best_clk = 0;
unsigned int div, best_div = 0;
unsigned int m, best_m = 0;
unsigned int resolution;
unsigned int error;
unsigned int best_err = UINT_MAX;
u64 max_period, min_period;
u64 best_period = 0;
u64 max_res;
/*
* The PWM period is determined by:
*
* resolution * pre_div * 2^M
* period = --------------------------
* refclk
*
* Resolution = 2^9 bits for PWM or
* 2^{8, 9, 10, 11, 12, 13, 14, 15} bits for high resolution PWM
* pre_div = {1, 3, 5, 6} and
* M = [0..7].
*
* This allows for periods between 27uS and 384s for PWM channels and periods between
* 3uS and 24576s for high resolution PWMs.
* The PWM framework wants a period of equal or lower length than requested,
* reject anything below minimum period.
*/
if (chan->subtype == LPG_SUBTYPE_HI_RES_PWM) {
clk_rate_arr = lpg_clk_rates_hi_res;
clk_len = ARRAY_SIZE(lpg_clk_rates_hi_res);
pwm_resolution_arr = lpg_pwm_resolution_hi_res;
pwm_resolution_count = ARRAY_SIZE(lpg_pwm_resolution_hi_res);
max_res = LPG_RESOLUTION_15BIT;
} else {
clk_rate_arr = lpg_clk_rates;
clk_len = ARRAY_SIZE(lpg_clk_rates);
pwm_resolution_arr = lpg_pwm_resolution;
pwm_resolution_count = ARRAY_SIZE(lpg_pwm_resolution);
max_res = LPG_RESOLUTION_9BIT;
}
min_period = div64_u64((u64)NSEC_PER_SEC * (1 << pwm_resolution_arr[0]),
clk_rate_arr[clk_len - 1]);
if (period <= min_period)
return -EINVAL;
/* Limit period to largest possible value, to avoid overflows */
max_period = div64_u64((u64)NSEC_PER_SEC * max_res * LPG_MAX_PREDIV * (1 << LPG_MAX_M),
1024);
if (period > max_period)
period = max_period;
/*
* Search for the pre_div, refclk, resolution and M by solving the rewritten formula
* for each refclk, resolution and pre_div value:
*
* period * refclk
* M = log2 -------------------------------------
* NSEC_PER_SEC * pre_div * resolution
*/
for (i = 0; i < pwm_resolution_count; i++) {
resolution = 1 << pwm_resolution_arr[i];
for (clk_sel = 1; clk_sel < clk_len; clk_sel++) {
u64 numerator = period * clk_rate_arr[clk_sel];
for (div = 0; div < ARRAY_SIZE(lpg_pre_divs); div++) {
u64 denominator = (u64)NSEC_PER_SEC * lpg_pre_divs[div] *
resolution;
u64 actual;
u64 ratio;
if (numerator < denominator)
continue;
ratio = div64_u64(numerator, denominator);
m = ilog2(ratio);
if (m > LPG_MAX_M)
m = LPG_MAX_M;
actual = DIV_ROUND_UP_ULL(denominator * (1 << m),
clk_rate_arr[clk_sel]);
error = period - actual;
if (error < best_err) {
best_err = error;
best_div = div;
best_m = m;
best_clk = clk_sel;
best_period = actual;
best_pwm_resolution_sel = i;
}
}
}
}
chan->clk_sel = best_clk;
chan->pre_div_sel = best_div;
chan->pre_div_exp = best_m;
chan->period = best_period;
chan->pwm_resolution_sel = best_pwm_resolution_sel;
return 0;
}
static void lpg_calc_duty(struct lpg_channel *chan, uint64_t duty)
{
unsigned int max;
unsigned int val;
unsigned int clk_rate;
if (chan->subtype == LPG_SUBTYPE_HI_RES_PWM) {
max = LPG_RESOLUTION_15BIT - 1;
clk_rate = lpg_clk_rates_hi_res[chan->clk_sel];
} else {
max = LPG_RESOLUTION_9BIT - 1;
clk_rate = lpg_clk_rates[chan->clk_sel];
}
val = div64_u64(duty * clk_rate,
(u64)NSEC_PER_SEC * lpg_pre_divs[chan->pre_div_sel] * (1 << chan->pre_div_exp));
chan->pwm_value = min(val, max);
}
static void lpg_apply_freq(struct lpg_channel *chan)
{
unsigned long val;
struct lpg *lpg = chan->lpg;
if (!chan->enabled)
return;
val = chan->clk_sel;
/* Specify resolution, based on the subtype of the channel */
switch (chan->subtype) {
case LPG_SUBTYPE_LPG:
val |= GENMASK(5, 4);
break;
case LPG_SUBTYPE_PWM:
val |= BIT(2);
break;
case LPG_SUBTYPE_HI_RES_PWM:
val |= FIELD_PREP(PWM_SIZE_HI_RES_MASK, chan->pwm_resolution_sel);
break;
case LPG_SUBTYPE_LPG_LITE:
default:
val |= BIT(4);
break;
}
regmap_write(lpg->map, chan->base + LPG_SIZE_CLK_REG, val);
val = FIELD_PREP(PWM_FREQ_PRE_DIV_MASK, chan->pre_div_sel) |
FIELD_PREP(PWM_FREQ_EXP_MASK, chan->pre_div_exp);
regmap_write(lpg->map, chan->base + LPG_PREDIV_CLK_REG, val);
}
#define LPG_ENABLE_GLITCH_REMOVAL BIT(5)
static void lpg_enable_glitch(struct lpg_channel *chan)
{
struct lpg *lpg = chan->lpg;
regmap_update_bits(lpg->map, chan->base + PWM_TYPE_CONFIG_REG,
LPG_ENABLE_GLITCH_REMOVAL, 0);
}
static void lpg_disable_glitch(struct lpg_channel *chan)
{
struct lpg *lpg = chan->lpg;
regmap_update_bits(lpg->map, chan->base + PWM_TYPE_CONFIG_REG,
LPG_ENABLE_GLITCH_REMOVAL,
LPG_ENABLE_GLITCH_REMOVAL);
}
static void lpg_apply_pwm_value(struct lpg_channel *chan)
{
struct lpg *lpg = chan->lpg;
u16 val = chan->pwm_value;
if (!chan->enabled)
return;
regmap_bulk_write(lpg->map, chan->base + PWM_VALUE_REG, &val, sizeof(val));
}
#define LPG_PATTERN_CONFIG_LO_TO_HI BIT(4)
#define LPG_PATTERN_CONFIG_REPEAT BIT(3)
#define LPG_PATTERN_CONFIG_TOGGLE BIT(2)
#define LPG_PATTERN_CONFIG_PAUSE_HI BIT(1)
#define LPG_PATTERN_CONFIG_PAUSE_LO BIT(0)
static void lpg_apply_lut_control(struct lpg_channel *chan)
{
struct lpg *lpg = chan->lpg;
unsigned int hi_pause;
unsigned int lo_pause;
unsigned int conf = 0;
unsigned int lo_idx = chan->pattern_lo_idx;
unsigned int hi_idx = chan->pattern_hi_idx;
u16 step = chan->ramp_tick_ms;
if (!chan->ramp_enabled || chan->pattern_lo_idx == chan->pattern_hi_idx)
return;
hi_pause = DIV_ROUND_UP(chan->ramp_hi_pause_ms, step);
lo_pause = DIV_ROUND_UP(chan->ramp_lo_pause_ms, step);
if (!chan->ramp_reverse)
conf |= LPG_PATTERN_CONFIG_LO_TO_HI;
if (!chan->ramp_oneshot)
conf |= LPG_PATTERN_CONFIG_REPEAT;
if (chan->ramp_ping_pong)
conf |= LPG_PATTERN_CONFIG_TOGGLE;
if (chan->ramp_hi_pause_ms)
conf |= LPG_PATTERN_CONFIG_PAUSE_HI;
if (chan->ramp_lo_pause_ms)
conf |= LPG_PATTERN_CONFIG_PAUSE_LO;
regmap_write(lpg->map, chan->base + LPG_PATTERN_CONFIG_REG, conf);
regmap_write(lpg->map, chan->base + LPG_HI_IDX_REG, hi_idx);
regmap_write(lpg->map, chan->base + LPG_LO_IDX_REG, lo_idx);
regmap_bulk_write(lpg->map, chan->base + LPG_RAMP_DURATION_REG, &step, sizeof(step));
regmap_write(lpg->map, chan->base + LPG_HI_PAUSE_REG, hi_pause);
regmap_write(lpg->map, chan->base + LPG_LO_PAUSE_REG, lo_pause);
}
#define LPG_ENABLE_CONTROL_OUTPUT BIT(7)
#define LPG_ENABLE_CONTROL_BUFFER_TRISTATE BIT(5)
#define LPG_ENABLE_CONTROL_SRC_PWM BIT(2)
#define LPG_ENABLE_CONTROL_RAMP_GEN BIT(1)
static void lpg_apply_control(struct lpg_channel *chan)
{
unsigned int ctrl;
struct lpg *lpg = chan->lpg;
ctrl = LPG_ENABLE_CONTROL_BUFFER_TRISTATE;
if (chan->enabled)
ctrl |= LPG_ENABLE_CONTROL_OUTPUT;
if (chan->pattern_lo_idx != chan->pattern_hi_idx)
ctrl |= LPG_ENABLE_CONTROL_RAMP_GEN;
else
ctrl |= LPG_ENABLE_CONTROL_SRC_PWM;
regmap_write(lpg->map, chan->base + PWM_ENABLE_CONTROL_REG, ctrl);
/*
* Due to LPG hardware bug, in the PWM mode, having enabled PWM,
* We have to write PWM values one more time.
*/
if (chan->enabled)
lpg_apply_pwm_value(chan);
}
#define LPG_SYNC_PWM BIT(0)
static void lpg_apply_sync(struct lpg_channel *chan)
{
struct lpg *lpg = chan->lpg;
regmap_write(lpg->map, chan->base + PWM_SYNC_REG, LPG_SYNC_PWM);
}
static int lpg_parse_dtest(struct lpg *lpg)
{
struct lpg_channel *chan;
struct device_node *np = lpg->dev->of_node;
int count;
int ret;
int i;
count = of_property_count_u32_elems(np, "qcom,dtest");
if (count == -EINVAL) {
return 0;
} else if (count < 0) {
ret = count;
goto err_malformed;
} else if (count != lpg->data->num_channels * 2) {
dev_err(lpg->dev, "qcom,dtest needs to be %d items\n",
lpg->data->num_channels * 2);
return -EINVAL;
}
for (i = 0; i < lpg->data->num_channels; i++) {
chan = &lpg->channels[i];
ret = of_property_read_u32_index(np, "qcom,dtest", i * 2,
&chan->dtest_line);
if (ret)
goto err_malformed;
ret = of_property_read_u32_index(np, "qcom,dtest", i * 2 + 1,
&chan->dtest_value);
if (ret)
goto err_malformed;
}
return 0;
err_malformed:
dev_err(lpg->dev, "malformed qcom,dtest\n");
return ret;
}
static void lpg_apply_dtest(struct lpg_channel *chan)
{
struct lpg *lpg = chan->lpg;
if (!chan->dtest_line)
return;
regmap_write(lpg->map, chan->base + PWM_SEC_ACCESS_REG, 0xa5);
regmap_write(lpg->map, chan->base + PWM_DTEST_REG(chan->dtest_line),
chan->dtest_value);
}
static void lpg_apply(struct lpg_channel *chan)
{
lpg_disable_glitch(chan);
lpg_apply_freq(chan);
lpg_apply_pwm_value(chan);
lpg_apply_control(chan);
lpg_apply_sync(chan);
lpg_apply_lut_control(chan);
lpg_enable_glitch(chan);
}
static void lpg_brightness_set(struct lpg_led *led, struct led_classdev *cdev,
struct mc_subled *subleds)
{
enum led_brightness brightness;
struct lpg_channel *chan;
unsigned int triled_enabled = 0;
unsigned int triled_mask = 0;
unsigned int lut_mask = 0;
unsigned int duty;
struct lpg *lpg = led->lpg;
int i;
for (i = 0; i < led->num_channels; i++) {
chan = led->channels[i];
brightness = subleds[i].brightness;
if (brightness == LED_OFF) {
chan->enabled = false;
chan->ramp_enabled = false;
} else if (chan->pattern_lo_idx != chan->pattern_hi_idx) {
lpg_calc_freq(chan, NSEC_PER_MSEC);
chan->enabled = true;
chan->ramp_enabled = true;
lut_mask |= chan->lut_mask;
triled_enabled |= chan->triled_mask;
} else {
lpg_calc_freq(chan, NSEC_PER_MSEC);
duty = div_u64(brightness * chan->period, cdev->max_brightness);
lpg_calc_duty(chan, duty);
chan->enabled = true;
chan->ramp_enabled = false;
triled_enabled |= chan->triled_mask;
}
triled_mask |= chan->triled_mask;
lpg_apply(chan);
}
/* Toggle triled lines */
if (triled_mask)
triled_set(lpg, triled_mask, triled_enabled);
/* Trigger start of ramp generator(s) */
if (lut_mask)
lpg_lut_sync(lpg, lut_mask);
}
static int lpg_brightness_single_set(struct led_classdev *cdev,
enum led_brightness value)
{
struct lpg_led *led = container_of(cdev, struct lpg_led, cdev);
struct mc_subled info;
mutex_lock(&led->lpg->lock);
info.brightness = value;
lpg_brightness_set(led, cdev, &info);
mutex_unlock(&led->lpg->lock);
return 0;
}
static int lpg_brightness_mc_set(struct led_classdev *cdev,
enum led_brightness value)
{
struct led_classdev_mc *mc = lcdev_to_mccdev(cdev);
struct lpg_led *led = container_of(mc, struct lpg_led, mcdev);
mutex_lock(&led->lpg->lock);
led_mc_calc_color_components(mc, value);
lpg_brightness_set(led, cdev, mc->subled_info);
mutex_unlock(&led->lpg->lock);
return 0;
}
static int lpg_blink_set(struct lpg_led *led,
unsigned long *delay_on, unsigned long *delay_off)
{
struct lpg_channel *chan;
unsigned int period;
unsigned int triled_mask = 0;
struct lpg *lpg = led->lpg;
u64 duty;
int i;
if (!*delay_on && !*delay_off) {
*delay_on = 500;
*delay_off = 500;
}
duty = *delay_on * NSEC_PER_MSEC;
period = (*delay_on + *delay_off) * NSEC_PER_MSEC;
for (i = 0; i < led->num_channels; i++) {
chan = led->channels[i];
lpg_calc_freq(chan, period);
lpg_calc_duty(chan, duty);
chan->enabled = true;
chan->ramp_enabled = false;
triled_mask |= chan->triled_mask;
lpg_apply(chan);
}
/* Enable triled lines */
triled_set(lpg, triled_mask, triled_mask);
chan = led->channels[0];
duty = div_u64(chan->pwm_value * chan->period, LPG_RESOLUTION_9BIT);
*delay_on = div_u64(duty, NSEC_PER_MSEC);
*delay_off = div_u64(chan->period - duty, NSEC_PER_MSEC);
return 0;
}
static int lpg_blink_single_set(struct led_classdev *cdev,
unsigned long *delay_on, unsigned long *delay_off)
{
struct lpg_led *led = container_of(cdev, struct lpg_led, cdev);
int ret;
mutex_lock(&led->lpg->lock);
ret = lpg_blink_set(led, delay_on, delay_off);
mutex_unlock(&led->lpg->lock);
return ret;
}
static int lpg_blink_mc_set(struct led_classdev *cdev,
unsigned long *delay_on, unsigned long *delay_off)
{
struct led_classdev_mc *mc = lcdev_to_mccdev(cdev);
struct lpg_led *led = container_of(mc, struct lpg_led, mcdev);
int ret;
mutex_lock(&led->lpg->lock);
ret = lpg_blink_set(led, delay_on, delay_off);
mutex_unlock(&led->lpg->lock);
return ret;
}
static int lpg_pattern_set(struct lpg_led *led, struct led_pattern *led_pattern,
u32 len, int repeat)
{
struct lpg_channel *chan;
struct lpg *lpg = led->lpg;
struct led_pattern *pattern;
unsigned int brightness_a;
unsigned int brightness_b;
unsigned int actual_len;
unsigned int hi_pause;
unsigned int lo_pause;
unsigned int delta_t;
unsigned int lo_idx;
unsigned int hi_idx;
unsigned int i;
bool ping_pong = true;
int ret = -EINVAL;
/* Hardware only support oneshot or indefinite loops */
if (repeat != -1 && repeat != 1)
return -EINVAL;
/*
* The standardized leds-trigger-pattern format defines that the
* brightness of the LED follows a linear transition from one entry
* in the pattern to the next, over the given delta_t time. It
* describes that the way to perform instant transitions a zero-length
* entry should be added following a pattern entry.
*
* The LPG hardware is only able to perform the latter (no linear
* transitions), so require each entry in the pattern to be followed by
* a zero-length transition.
*/
if (len % 2)
return -EINVAL;
pattern = kcalloc(len / 2, sizeof(*pattern), GFP_KERNEL);
if (!pattern)
return -ENOMEM;
for (i = 0; i < len; i += 2) {
if (led_pattern[i].brightness != led_pattern[i + 1].brightness)
goto out_free_pattern;
if (led_pattern[i + 1].delta_t != 0)
goto out_free_pattern;
pattern[i / 2].brightness = led_pattern[i].brightness;
pattern[i / 2].delta_t = led_pattern[i].delta_t;
}
len /= 2;
/*
* Specifying a pattern of length 1 causes the hardware to iterate
* through the entire LUT, so prohibit this.
*/
if (len < 2)
goto out_free_pattern;
/*
* The LPG plays patterns with at a fixed pace, a "low pause" can be
* used to stretch the first delay of the pattern and a "high pause"
* the last one.
*
* In order to save space the pattern can be played in "ping pong"
* mode, in which the pattern is first played forward, then "high
* pause" is applied, then the pattern is played backwards and finally
* the "low pause" is applied.
*
* The middle elements of the pattern are used to determine delta_t and
* the "low pause" and "high pause" multipliers are derrived from this.
*
* The first element in the pattern is used to determine "low pause".
*
* If the specified pattern is a palindrome the ping pong mode is
* enabled. In this scenario the delta_t of the middle entry (i.e. the
* last in the programmed pattern) determines the "high pause".
*/
/* Detect palindromes and use "ping pong" to reduce LUT usage */
for (i = 0; i < len / 2; i++) {
brightness_a = pattern[i].brightness;
brightness_b = pattern[len - i - 1].brightness;
if (brightness_a != brightness_b) {
ping_pong = false;
break;
}
}
/* The pattern length to be written to the LUT */
if (ping_pong)
actual_len = (len + 1) / 2;
else
actual_len = len;
/*
* Validate that all delta_t in the pattern are the same, with the
* exception of the middle element in case of ping_pong.
*/
delta_t = pattern[1].delta_t;
for (i = 2; i < len; i++) {
if (pattern[i].delta_t != delta_t) {
/*
* Allow last entry in the full or shortened pattern to
* specify hi pause. Reject other variations.
*/
if (i != actual_len - 1)
goto out_free_pattern;
}
}
/* LPG_RAMP_DURATION_REG is a 9bit */
if (delta_t >= BIT(9))
goto out_free_pattern;
/* Find "low pause" and "high pause" in the pattern */
lo_pause = pattern[0].delta_t;
hi_pause = pattern[actual_len - 1].delta_t;
mutex_lock(&lpg->lock);
ret = lpg_lut_store(lpg, pattern, actual_len, &lo_idx, &hi_idx);
if (ret < 0)
goto out_unlock;
for (i = 0; i < led->num_channels; i++) {
chan = led->channels[i];
chan->ramp_tick_ms = delta_t;
chan->ramp_ping_pong = ping_pong;
chan->ramp_oneshot = repeat != -1;
chan->ramp_lo_pause_ms = lo_pause;
chan->ramp_hi_pause_ms = hi_pause;
chan->pattern_lo_idx = lo_idx;
chan->pattern_hi_idx = hi_idx;
}
out_unlock:
mutex_unlock(&lpg->lock);
out_free_pattern:
kfree(pattern);
return ret;
}
static int lpg_pattern_single_set(struct led_classdev *cdev,
struct led_pattern *pattern, u32 len,
int repeat)
{
struct lpg_led *led = container_of(cdev, struct lpg_led, cdev);
int ret;
ret = lpg_pattern_set(led, pattern, len, repeat);
if (ret < 0)
return ret;
lpg_brightness_single_set(cdev, LED_FULL);
return 0;
}
static int lpg_pattern_mc_set(struct led_classdev *cdev,
struct led_pattern *pattern, u32 len,
int repeat)
{
struct led_classdev_mc *mc = lcdev_to_mccdev(cdev);
struct lpg_led *led = container_of(mc, struct lpg_led, mcdev);
int ret;
ret = lpg_pattern_set(led, pattern, len, repeat);
if (ret < 0)
return ret;
led_mc_calc_color_components(mc, LED_FULL);
lpg_brightness_set(led, cdev, mc->subled_info);
return 0;
}
static int lpg_pattern_clear(struct lpg_led *led)
{
struct lpg_channel *chan;
struct lpg *lpg = led->lpg;
int i;
mutex_lock(&lpg->lock);
chan = led->channels[0];
lpg_lut_free(lpg, chan->pattern_lo_idx, chan->pattern_hi_idx);
for (i = 0; i < led->num_channels; i++) {
chan = led->channels[i];
chan->pattern_lo_idx = 0;
chan->pattern_hi_idx = 0;
}
mutex_unlock(&lpg->lock);
return 0;
}
static int lpg_pattern_single_clear(struct led_classdev *cdev)
{
struct lpg_led *led = container_of(cdev, struct lpg_led, cdev);
return lpg_pattern_clear(led);
}
static int lpg_pattern_mc_clear(struct led_classdev *cdev)
{
struct led_classdev_mc *mc = lcdev_to_mccdev(cdev);
struct lpg_led *led = container_of(mc, struct lpg_led, mcdev);
return lpg_pattern_clear(led);
}
static int lpg_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm)
{
struct lpg *lpg = container_of(chip, struct lpg, pwm);
struct lpg_channel *chan = &lpg->channels[pwm->hwpwm];
return chan->in_use ? -EBUSY : 0;
}
/*
* Limitations:
* - Updating both duty and period is not done atomically, so the output signal
* will momentarily be a mix of the settings.
* - Changed parameters takes effect immediately.
* - A disabled channel outputs a logical 0.
*/
static int lpg_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
const struct pwm_state *state)
{
struct lpg *lpg = container_of(chip, struct lpg, pwm);
struct lpg_channel *chan = &lpg->channels[pwm->hwpwm];
int ret = 0;
if (state->polarity != PWM_POLARITY_NORMAL)
return -EINVAL;
mutex_lock(&lpg->lock);
if (state->enabled) {
ret = lpg_calc_freq(chan, state->period);
if (ret < 0)
goto out_unlock;
lpg_calc_duty(chan, state->duty_cycle);
}
chan->enabled = state->enabled;
lpg_apply(chan);
triled_set(lpg, chan->triled_mask, chan->enabled ? chan->triled_mask : 0);
out_unlock:
mutex_unlock(&lpg->lock);
return ret;
}
static int lpg_pwm_get_state(struct pwm_chip *chip, struct pwm_device *pwm,
struct pwm_state *state)
{
struct lpg *lpg = container_of(chip, struct lpg, pwm);
struct lpg_channel *chan = &lpg->channels[pwm->hwpwm];
unsigned int resolution;
unsigned int pre_div;
unsigned int refclk;
unsigned int val;
unsigned int m;
u16 pwm_value;
int ret;
ret = regmap_read(lpg->map, chan->base + LPG_SIZE_CLK_REG, &val);
if (ret)
return ret;
if (chan->subtype == LPG_SUBTYPE_HI_RES_PWM) {
refclk = lpg_clk_rates_hi_res[FIELD_GET(PWM_CLK_SELECT_HI_RES_MASK, val)];
resolution = lpg_pwm_resolution_hi_res[FIELD_GET(PWM_SIZE_HI_RES_MASK, val)];
} else {
refclk = lpg_clk_rates[FIELD_GET(PWM_CLK_SELECT_MASK, val)];
resolution = 9;
}
if (refclk) {
ret = regmap_read(lpg->map, chan->base + LPG_PREDIV_CLK_REG, &val);
if (ret)
return ret;
pre_div = lpg_pre_divs[FIELD_GET(PWM_FREQ_PRE_DIV_MASK, val)];
m = FIELD_GET(PWM_FREQ_EXP_MASK, val);
ret = regmap_bulk_read(lpg->map, chan->base + PWM_VALUE_REG, &pwm_value, sizeof(pwm_value));
if (ret)
return ret;
state->period = DIV_ROUND_UP_ULL((u64)NSEC_PER_SEC * (1 << resolution) *
pre_div * (1 << m), refclk);
state->duty_cycle = DIV_ROUND_UP_ULL((u64)NSEC_PER_SEC * pwm_value * pre_div * (1 << m), refclk);
} else {
state->period = 0;
state->duty_cycle = 0;
}
ret = regmap_read(lpg->map, chan->base + PWM_ENABLE_CONTROL_REG, &val);
if (ret)
return ret;
state->enabled = FIELD_GET(LPG_ENABLE_CONTROL_OUTPUT, val);
state->polarity = PWM_POLARITY_NORMAL;
if (state->duty_cycle > state->period)
state->duty_cycle = state->period;
return 0;
}
static const struct pwm_ops lpg_pwm_ops = {
.request = lpg_pwm_request,
.apply = lpg_pwm_apply,
.get_state = lpg_pwm_get_state,
.owner = THIS_MODULE,
};
static int lpg_add_pwm(struct lpg *lpg)
{
int ret;
lpg->pwm.dev = lpg->dev;
lpg->pwm.npwm = lpg->num_channels;
lpg->pwm.ops = &lpg_pwm_ops;
ret = pwmchip_add(&lpg->pwm);
if (ret)
dev_err(lpg->dev, "failed to add PWM chip: ret %d\n", ret);
return ret;
}
static int lpg_parse_channel(struct lpg *lpg, struct device_node *np,
struct lpg_channel **channel)
{
struct lpg_channel *chan;
u32 color = LED_COLOR_ID_GREEN;
u32 reg;
int ret;
ret = of_property_read_u32(np, "reg", ®);
if (ret || !reg || reg > lpg->num_channels) {
dev_err(lpg->dev, "invalid \"reg\" of %pOFn\n", np);
return -EINVAL;
}
chan = &lpg->channels[reg - 1];
chan->in_use = true;
ret = of_property_read_u32(np, "color", &color);
if (ret < 0 && ret != -EINVAL) {
dev_err(lpg->dev, "failed to parse \"color\" of %pOF\n", np);
return ret;
}
chan->color = color;
*channel = chan;
return 0;
}
static int lpg_add_led(struct lpg *lpg, struct device_node *np)
{
struct led_init_data init_data = {};
struct led_classdev *cdev;
struct device_node *child;
struct mc_subled *info;
struct lpg_led *led;
const char *state;
int num_channels;
u32 color = 0;
int ret;
int i;
ret = of_property_read_u32(np, "color", &color);
if (ret < 0 && ret != -EINVAL) {
dev_err(lpg->dev, "failed to parse \"color\" of %pOF\n", np);
return ret;
}
if (color == LED_COLOR_ID_RGB)
num_channels = of_get_available_child_count(np);
else
num_channels = 1;
led = devm_kzalloc(lpg->dev, struct_size(led, channels, num_channels), GFP_KERNEL);
if (!led)
return -ENOMEM;
led->lpg = lpg;
led->num_channels = num_channels;
if (color == LED_COLOR_ID_RGB) {
info = devm_kcalloc(lpg->dev, num_channels, sizeof(*info), GFP_KERNEL);
if (!info)
return -ENOMEM;
i = 0;
for_each_available_child_of_node(np, child) {
ret = lpg_parse_channel(lpg, child, &led->channels[i]);
if (ret < 0) {
of_node_put(child);
return ret;
}
info[i].color_index = led->channels[i]->color;
info[i].intensity = 0;
i++;
}
led->mcdev.subled_info = info;
led->mcdev.num_colors = num_channels;
cdev = &led->mcdev.led_cdev;
cdev->brightness_set_blocking = lpg_brightness_mc_set;
cdev->blink_set = lpg_blink_mc_set;
/* Register pattern accessors only if we have a LUT block */
if (lpg->lut_base) {
cdev->pattern_set = lpg_pattern_mc_set;
cdev->pattern_clear = lpg_pattern_mc_clear;
}
} else {
ret = lpg_parse_channel(lpg, np, &led->channels[0]);
if (ret < 0)
return ret;
cdev = &led->cdev;
cdev->brightness_set_blocking = lpg_brightness_single_set;
cdev->blink_set = lpg_blink_single_set;
/* Register pattern accessors only if we have a LUT block */
if (lpg->lut_base) {
cdev->pattern_set = lpg_pattern_single_set;
cdev->pattern_clear = lpg_pattern_single_clear;
}
}
cdev->default_trigger = of_get_property(np, "linux,default-trigger", NULL);
cdev->max_brightness = LPG_RESOLUTION_9BIT - 1;
if (!of_property_read_string(np, "default-state", &state) &&
!strcmp(state, "on"))
cdev->brightness = cdev->max_brightness;
else
cdev->brightness = LED_OFF;
cdev->brightness_set_blocking(cdev, cdev->brightness);
init_data.fwnode = of_fwnode_handle(np);
if (color == LED_COLOR_ID_RGB)
ret = devm_led_classdev_multicolor_register_ext(lpg->dev, &led->mcdev, &init_data);
else
ret = devm_led_classdev_register_ext(lpg->dev, &led->cdev, &init_data);
if (ret)
dev_err(lpg->dev, "unable to register %s\n", cdev->name);
return ret;
}
static int lpg_init_channels(struct lpg *lpg)
{
const struct lpg_data *data = lpg->data;
struct lpg_channel *chan;
int i;
lpg->num_channels = data->num_channels;
lpg->channels = devm_kcalloc(lpg->dev, data->num_channels,
sizeof(struct lpg_channel), GFP_KERNEL);
if (!lpg->channels)
return -ENOMEM;
for (i = 0; i < data->num_channels; i++) {
chan = &lpg->channels[i];
chan->lpg = lpg;
chan->base = data->channels[i].base;
chan->triled_mask = data->channels[i].triled_mask;
chan->lut_mask = BIT(i);
regmap_read(lpg->map, chan->base + LPG_SUBTYPE_REG, &chan->subtype);
}
return 0;
}
static int lpg_init_triled(struct lpg *lpg)
{
struct device_node *np = lpg->dev->of_node;
int ret;
/* Skip initialization if we don't have a triled block */
if (!lpg->data->triled_base)
return 0;
lpg->triled_base = lpg->data->triled_base;
lpg->triled_has_atc_ctl = lpg->data->triled_has_atc_ctl;
lpg->triled_has_src_sel = lpg->data->triled_has_src_sel;
if (lpg->triled_has_src_sel) {
ret = of_property_read_u32(np, "qcom,power-source", &lpg->triled_src);
if (ret || lpg->triled_src == 2 || lpg->triled_src > 3) {
dev_err(lpg->dev, "invalid power source\n");
return -EINVAL;
}
}
/* Disable automatic trickle charge LED */
if (lpg->triled_has_atc_ctl)
regmap_write(lpg->map, lpg->triled_base + TRI_LED_ATC_CTL, 0);
/* Configure power source */
if (lpg->triled_has_src_sel)
regmap_write(lpg->map, lpg->triled_base + TRI_LED_SRC_SEL, lpg->triled_src);
/* Default all outputs to off */
regmap_write(lpg->map, lpg->triled_base + TRI_LED_EN_CTL, 0);
return 0;
}
static int lpg_init_lut(struct lpg *lpg)
{
const struct lpg_data *data = lpg->data;
if (!data->lut_base)
return 0;
lpg->lut_base = data->lut_base;
lpg->lut_size = data->lut_size;
lpg->lut_bitmap = devm_bitmap_zalloc(lpg->dev, lpg->lut_size, GFP_KERNEL);
if (!lpg->lut_bitmap)
return -ENOMEM;
return 0;
}
static int lpg_probe(struct platform_device *pdev)
{
struct device_node *np;
struct lpg *lpg;
int ret;
int i;
lpg = devm_kzalloc(&pdev->dev, sizeof(*lpg), GFP_KERNEL);
if (!lpg)
return -ENOMEM;
lpg->data = of_device_get_match_data(&pdev->dev);
if (!lpg->data)
return -EINVAL;
platform_set_drvdata(pdev, lpg);
lpg->dev = &pdev->dev;
mutex_init(&lpg->lock);
lpg->map = dev_get_regmap(pdev->dev.parent, NULL);
if (!lpg->map)
return dev_err_probe(&pdev->dev, -ENXIO, "parent regmap unavailable\n");
ret = lpg_init_channels(lpg);
if (ret < 0)
return ret;
ret = lpg_parse_dtest(lpg);
if (ret < 0)
return ret;
ret = lpg_init_triled(lpg);
if (ret < 0)
return ret;
ret = lpg_init_lut(lpg);
if (ret < 0)
return ret;
for_each_available_child_of_node(pdev->dev.of_node, np) {
ret = lpg_add_led(lpg, np);
if (ret) {
of_node_put(np);
return ret;
}
}
for (i = 0; i < lpg->num_channels; i++)
lpg_apply_dtest(&lpg->channels[i]);
return lpg_add_pwm(lpg);
}
static int lpg_remove(struct platform_device *pdev)
{
struct lpg *lpg = platform_get_drvdata(pdev);
pwmchip_remove(&lpg->pwm);
return 0;
}
static const struct lpg_data pm8916_pwm_data = {
.num_channels = 1,
.channels = (const struct lpg_channel_data[]) {
{ .base = 0xbc00 },
},
};
static const struct lpg_data pm8941_lpg_data = {
.lut_base = 0xb000,
.lut_size = 64,
.triled_base = 0xd000,
.triled_has_atc_ctl = true,
.triled_has_src_sel = true,
.num_channels = 8,
.channels = (const struct lpg_channel_data[]) {
{ .base = 0xb100 },
{ .base = 0xb200 },
{ .base = 0xb300 },
{ .base = 0xb400 },
{ .base = 0xb500, .triled_mask = BIT(5) },
{ .base = 0xb600, .triled_mask = BIT(6) },
{ .base = 0xb700, .triled_mask = BIT(7) },
{ .base = 0xb800 },
},
};
static const struct lpg_data pm8994_lpg_data = {
.lut_base = 0xb000,
.lut_size = 64,
.num_channels = 6,
.channels = (const struct lpg_channel_data[]) {
{ .base = 0xb100 },
{ .base = 0xb200 },
{ .base = 0xb300 },
{ .base = 0xb400 },
{ .base = 0xb500 },
{ .base = 0xb600 },
},
};
/* PMI632 uses SDAM instead of LUT for pattern */
static const struct lpg_data pmi632_lpg_data = {
.triled_base = 0xd000,
.num_channels = 5,
.channels = (const struct lpg_channel_data[]) {
{ .base = 0xb300, .triled_mask = BIT(7) },
{ .base = 0xb400, .triled_mask = BIT(6) },
{ .base = 0xb500, .triled_mask = BIT(5) },
{ .base = 0xb600 },
{ .base = 0xb700 },
},
};
static const struct lpg_data pmi8994_lpg_data = {
.lut_base = 0xb000,
.lut_size = 24,
.triled_base = 0xd000,
.triled_has_atc_ctl = true,
.triled_has_src_sel = true,
.num_channels = 4,
.channels = (const struct lpg_channel_data[]) {
{ .base = 0xb100, .triled_mask = BIT(5) },
{ .base = 0xb200, .triled_mask = BIT(6) },
{ .base = 0xb300, .triled_mask = BIT(7) },
{ .base = 0xb400 },
},
};
static const struct lpg_data pmi8998_lpg_data = {
.lut_base = 0xb000,
.lut_size = 49,
.triled_base = 0xd000,
.num_channels = 6,
.channels = (const struct lpg_channel_data[]) {
{ .base = 0xb100 },
{ .base = 0xb200 },
{ .base = 0xb300, .triled_mask = BIT(5) },
{ .base = 0xb400, .triled_mask = BIT(6) },
{ .base = 0xb500, .triled_mask = BIT(7) },
{ .base = 0xb600 },
},
};
static const struct lpg_data pm8150b_lpg_data = {
.lut_base = 0xb000,
.lut_size = 24,
.triled_base = 0xd000,
.num_channels = 2,
.channels = (const struct lpg_channel_data[]) {
{ .base = 0xb100, .triled_mask = BIT(7) },
{ .base = 0xb200, .triled_mask = BIT(6) },
},
};
static const struct lpg_data pm8150l_lpg_data = {
.lut_base = 0xb000,
.lut_size = 48,
.triled_base = 0xd000,
.num_channels = 5,
.channels = (const struct lpg_channel_data[]) {
{ .base = 0xb100, .triled_mask = BIT(7) },
{ .base = 0xb200, .triled_mask = BIT(6) },
{ .base = 0xb300, .triled_mask = BIT(5) },
{ .base = 0xbc00 },
{ .base = 0xbd00 },
},
};
static const struct lpg_data pm8350c_pwm_data = {
.triled_base = 0xef00,
.num_channels = 4,
.channels = (const struct lpg_channel_data[]) {
{ .base = 0xe800, .triled_mask = BIT(7) },
{ .base = 0xe900, .triled_mask = BIT(6) },
{ .base = 0xea00, .triled_mask = BIT(5) },
{ .base = 0xeb00 },
},
};
static const struct lpg_data pmk8550_pwm_data = {
.num_channels = 2,
.channels = (const struct lpg_channel_data[]) {
{ .base = 0xe800 },
{ .base = 0xe900 },
},
};
static const struct of_device_id lpg_of_table[] = {
{ .compatible = "qcom,pm8150b-lpg", .data = &pm8150b_lpg_data },
{ .compatible = "qcom,pm8150l-lpg", .data = &pm8150l_lpg_data },
{ .compatible = "qcom,pm8350c-pwm", .data = &pm8350c_pwm_data },
{ .compatible = "qcom,pm8916-pwm", .data = &pm8916_pwm_data },
{ .compatible = "qcom,pm8941-lpg", .data = &pm8941_lpg_data },
{ .compatible = "qcom,pm8994-lpg", .data = &pm8994_lpg_data },
{ .compatible = "qcom,pmi632-lpg", .data = &pmi632_lpg_data },
{ .compatible = "qcom,pmi8994-lpg", .data = &pmi8994_lpg_data },
{ .compatible = "qcom,pmi8998-lpg", .data = &pmi8998_lpg_data },
{ .compatible = "qcom,pmc8180c-lpg", .data = &pm8150l_lpg_data },
{ .compatible = "qcom,pmk8550-pwm", .data = &pmk8550_pwm_data },
{}
};
MODULE_DEVICE_TABLE(of, lpg_of_table);
static struct platform_driver lpg_driver = {
.probe = lpg_probe,
.remove = lpg_remove,
.driver = {
.name = "qcom-spmi-lpg",
.of_match_table = lpg_of_table,
},
};
module_platform_driver(lpg_driver);
MODULE_DESCRIPTION("Qualcomm LPG LED driver");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/rgb/leds-qcom-lpg.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* PWM-based multi-color LED control
*
* Copyright 2022 Sven Schwermer <[email protected]>
*/
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/led-class-multicolor.h>
#include <linux/leds.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/platform_device.h>
#include <linux/property.h>
#include <linux/pwm.h>
struct pwm_led {
struct pwm_device *pwm;
struct pwm_state state;
bool active_low;
};
struct pwm_mc_led {
struct led_classdev_mc mc_cdev;
struct mutex lock;
struct pwm_led leds[];
};
static int led_pwm_mc_set(struct led_classdev *cdev,
enum led_brightness brightness)
{
struct led_classdev_mc *mc_cdev = lcdev_to_mccdev(cdev);
struct pwm_mc_led *priv = container_of(mc_cdev, struct pwm_mc_led, mc_cdev);
unsigned long long duty;
int ret = 0;
int i;
led_mc_calc_color_components(mc_cdev, brightness);
mutex_lock(&priv->lock);
for (i = 0; i < mc_cdev->num_colors; i++) {
duty = priv->leds[i].state.period;
duty *= mc_cdev->subled_info[i].brightness;
do_div(duty, cdev->max_brightness);
if (priv->leds[i].active_low)
duty = priv->leds[i].state.period - duty;
priv->leds[i].state.duty_cycle = duty;
priv->leds[i].state.enabled = duty > 0;
ret = pwm_apply_state(priv->leds[i].pwm,
&priv->leds[i].state);
if (ret)
break;
}
mutex_unlock(&priv->lock);
return ret;
}
static int iterate_subleds(struct device *dev, struct pwm_mc_led *priv,
struct fwnode_handle *mcnode)
{
struct mc_subled *subled = priv->mc_cdev.subled_info;
struct fwnode_handle *fwnode;
struct pwm_led *pwmled;
u32 color;
int ret;
/* iterate over the nodes inside the multi-led node */
fwnode_for_each_child_node(mcnode, fwnode) {
pwmled = &priv->leds[priv->mc_cdev.num_colors];
pwmled->pwm = devm_fwnode_pwm_get(dev, fwnode, NULL);
if (IS_ERR(pwmled->pwm)) {
ret = dev_err_probe(dev, PTR_ERR(pwmled->pwm), "unable to request PWM\n");
goto release_fwnode;
}
pwm_init_state(pwmled->pwm, &pwmled->state);
pwmled->active_low = fwnode_property_read_bool(fwnode, "active-low");
ret = fwnode_property_read_u32(fwnode, "color", &color);
if (ret) {
dev_err(dev, "cannot read color: %d\n", ret);
goto release_fwnode;
}
subled[priv->mc_cdev.num_colors].color_index = color;
priv->mc_cdev.num_colors++;
}
return 0;
release_fwnode:
fwnode_handle_put(fwnode);
return ret;
}
static int led_pwm_mc_probe(struct platform_device *pdev)
{
struct fwnode_handle *mcnode, *fwnode;
struct led_init_data init_data = {};
struct led_classdev *cdev;
struct mc_subled *subled;
struct pwm_mc_led *priv;
int count = 0;
int ret = 0;
mcnode = device_get_named_child_node(&pdev->dev, "multi-led");
if (!mcnode)
return dev_err_probe(&pdev->dev, -ENODEV,
"expected multi-led node\n");
/* count the nodes inside the multi-led node */
fwnode_for_each_child_node(mcnode, fwnode)
count++;
priv = devm_kzalloc(&pdev->dev, struct_size(priv, leds, count),
GFP_KERNEL);
if (!priv) {
ret = -ENOMEM;
goto release_mcnode;
}
mutex_init(&priv->lock);
subled = devm_kcalloc(&pdev->dev, count, sizeof(*subled), GFP_KERNEL);
if (!subled) {
ret = -ENOMEM;
goto release_mcnode;
}
priv->mc_cdev.subled_info = subled;
/* init the multicolor's LED class device */
cdev = &priv->mc_cdev.led_cdev;
fwnode_property_read_u32(mcnode, "max-brightness",
&cdev->max_brightness);
cdev->flags = LED_CORE_SUSPENDRESUME;
cdev->brightness_set_blocking = led_pwm_mc_set;
ret = iterate_subleds(&pdev->dev, priv, mcnode);
if (ret)
goto release_mcnode;
init_data.fwnode = mcnode;
ret = devm_led_classdev_multicolor_register_ext(&pdev->dev,
&priv->mc_cdev,
&init_data);
if (ret) {
dev_err(&pdev->dev,
"failed to register multicolor PWM led for %s: %d\n",
cdev->name, ret);
goto release_mcnode;
}
ret = led_pwm_mc_set(cdev, cdev->brightness);
if (ret)
return dev_err_probe(&pdev->dev, ret,
"failed to set led PWM value for %s\n",
cdev->name);
platform_set_drvdata(pdev, priv);
return 0;
release_mcnode:
fwnode_handle_put(mcnode);
return ret;
}
static const struct of_device_id of_pwm_leds_mc_match[] = {
{ .compatible = "pwm-leds-multicolor", },
{}
};
MODULE_DEVICE_TABLE(of, of_pwm_leds_mc_match);
static struct platform_driver led_pwm_mc_driver = {
.probe = led_pwm_mc_probe,
.driver = {
.name = "leds_pwm_multicolor",
.of_match_table = of_pwm_leds_mc_match,
},
};
module_platform_driver(led_pwm_mc_driver);
MODULE_AUTHOR("Sven Schwermer <[email protected]>");
MODULE_DESCRIPTION("multi-color PWM LED driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:leds-pwm-multicolor");
| linux-master | drivers/leds/rgb/leds-pwm-multicolor.c |
// SPDX-License-Identifier: GPL-2.0
/*
* Multi-color LED built with monochromatic LED devices
*
* This driver groups several monochromatic LED devices in a single multicolor LED device.
*
* Compared to handling this grouping in user-space, the benefits are:
* - The state of the monochromatic LED relative to each other is always consistent.
* - The sysfs interface of the LEDs can be used for the group as a whole.
*
* Copyright 2023 Jean-Jacques Hiblot <[email protected]>
*/
#include <linux/err.h>
#include <linux/leds.h>
#include <linux/led-class-multicolor.h>
#include <linux/math.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/platform_device.h>
#include <linux/property.h>
struct leds_multicolor {
struct led_classdev_mc mc_cdev;
struct led_classdev **monochromatics;
};
static int leds_gmc_set(struct led_classdev *cdev, enum led_brightness brightness)
{
struct led_classdev_mc *mc_cdev = lcdev_to_mccdev(cdev);
struct leds_multicolor *priv = container_of(mc_cdev, struct leds_multicolor, mc_cdev);
const unsigned int group_max_brightness = mc_cdev->led_cdev.max_brightness;
int i;
for (i = 0; i < mc_cdev->num_colors; i++) {
struct led_classdev *mono = priv->monochromatics[i];
const unsigned int mono_max_brightness = mono->max_brightness;
unsigned int intensity = mc_cdev->subled_info[i].intensity;
int mono_brightness;
/*
* Scale the brightness according to relative intensity of the
* color AND the max brightness of the monochromatic LED.
*/
mono_brightness = DIV_ROUND_CLOSEST(brightness * intensity * mono_max_brightness,
group_max_brightness * group_max_brightness);
led_set_brightness(mono, mono_brightness);
}
return 0;
}
static void restore_sysfs_write_access(void *data)
{
struct led_classdev *led_cdev = data;
/* Restore the write acccess to the LED */
mutex_lock(&led_cdev->led_access);
led_sysfs_enable(led_cdev);
mutex_unlock(&led_cdev->led_access);
}
static int leds_gmc_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct led_init_data init_data = {};
struct led_classdev *cdev;
struct mc_subled *subled;
struct leds_multicolor *priv;
unsigned int max_brightness = 0;
int i, ret, count = 0;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
for (;;) {
struct led_classdev *led_cdev;
led_cdev = devm_of_led_get_optional(dev, count);
if (IS_ERR(led_cdev))
return dev_err_probe(dev, PTR_ERR(led_cdev), "Unable to get LED #%d",
count);
if (!led_cdev)
break;
priv->monochromatics = devm_krealloc_array(dev, priv->monochromatics,
count + 1, sizeof(*priv->monochromatics),
GFP_KERNEL);
if (!priv->monochromatics)
return -ENOMEM;
priv->monochromatics[count] = led_cdev;
max_brightness = max(max_brightness, led_cdev->max_brightness);
count++;
}
subled = devm_kcalloc(dev, count, sizeof(*subled), GFP_KERNEL);
if (!subled)
return -ENOMEM;
priv->mc_cdev.subled_info = subled;
for (i = 0; i < count; i++) {
struct led_classdev *led_cdev = priv->monochromatics[i];
subled[i].color_index = led_cdev->color;
/* Configure the LED intensity to its maximum */
subled[i].intensity = max_brightness;
}
/* Initialise the multicolor's LED class device */
cdev = &priv->mc_cdev.led_cdev;
cdev->flags = LED_CORE_SUSPENDRESUME;
cdev->brightness_set_blocking = leds_gmc_set;
cdev->max_brightness = max_brightness;
cdev->color = LED_COLOR_ID_MULTI;
priv->mc_cdev.num_colors = count;
init_data.fwnode = dev_fwnode(dev);
ret = devm_led_classdev_multicolor_register_ext(dev, &priv->mc_cdev, &init_data);
if (ret)
return dev_err_probe(dev, ret, "failed to register multicolor LED for %s.\n",
cdev->name);
ret = leds_gmc_set(cdev, cdev->brightness);
if (ret)
return dev_err_probe(dev, ret, "failed to set LED value for %s.", cdev->name);
for (i = 0; i < count; i++) {
struct led_classdev *led_cdev = priv->monochromatics[i];
/*
* Make the individual LED sysfs interface read-only to prevent the user
* to change the brightness of the individual LEDs of the group.
*/
mutex_lock(&led_cdev->led_access);
led_sysfs_disable(led_cdev);
mutex_unlock(&led_cdev->led_access);
/* Restore the write access to the LED sysfs when the group is destroyed */
devm_add_action_or_reset(dev, restore_sysfs_write_access, led_cdev);
}
return 0;
}
static const struct of_device_id of_leds_group_multicolor_match[] = {
{ .compatible = "leds-group-multicolor" },
{}
};
MODULE_DEVICE_TABLE(of, of_leds_group_multicolor_match);
static struct platform_driver leds_group_multicolor_driver = {
.probe = leds_gmc_probe,
.driver = {
.name = "leds_group_multicolor",
.of_match_table = of_leds_group_multicolor_match,
}
};
module_platform_driver(leds_group_multicolor_driver);
MODULE_AUTHOR("Jean-Jacques Hiblot <[email protected]>");
MODULE_DESCRIPTION("LEDs group multicolor driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:leds-group-multicolor");
| linux-master | drivers/leds/rgb/leds-group-multicolor.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2023 Richtek Technology Corp.
*
* Authors:
* ChiYuan Huang <[email protected]>
* Alice Chen <[email protected]>
*/
#include <linux/bitfield.h>
#include <linux/bitops.h>
#include <linux/kernel.h>
#include <linux/leds.h>
#include <linux/led-class-multicolor.h>
#include <linux/linear_range.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/platform_device.h>
#include <linux/property.h>
#include <linux/regmap.h>
#include <linux/util_macros.h>
#include <asm/unaligned.h>
enum {
MT6370_LED_ISNK1 = 0,
MT6370_LED_ISNK2,
MT6370_LED_ISNK3,
MT6370_LED_ISNK4,
MT6370_MAX_LEDS
};
enum mt6370_led_mode {
MT6370_LED_PWM_MODE = 0,
MT6370_LED_BREATH_MODE,
MT6370_LED_REG_MODE,
MT6370_LED_MAX_MODE
};
enum mt6370_led_field {
F_RGB_EN = 0,
F_CHGIND_EN,
F_LED1_CURR,
F_LED2_CURR,
F_LED3_CURR,
F_LED4_CURR,
F_LED1_MODE,
F_LED2_MODE,
F_LED3_MODE,
F_LED4_MODE,
F_LED1_DUTY,
F_LED2_DUTY,
F_LED3_DUTY,
F_LED4_DUTY,
F_LED1_FREQ,
F_LED2_FREQ,
F_LED3_FREQ,
F_LED4_FREQ,
F_MAX_FIELDS
};
enum mt6370_led_ranges {
R_LED123_CURR = 0,
R_LED4_CURR,
R_LED_TRFON,
R_LED_TOFF,
R_MAX_RANGES
};
enum mt6370_pattern {
P_LED_TR1 = 0,
P_LED_TR2,
P_LED_TF1,
P_LED_TF2,
P_LED_TON,
P_LED_TOFF,
P_MAX_PATTERNS
};
#define MT6370_REG_DEV_INFO 0x100
#define MT6370_REG_RGB1_DIM 0x182
#define MT6370_REG_RGB2_DIM 0x183
#define MT6370_REG_RGB3_DIM 0x184
#define MT6370_REG_RGB_EN 0x185
#define MT6370_REG_RGB1_ISNK 0x186
#define MT6370_REG_RGB2_ISNK 0x187
#define MT6370_REG_RGB3_ISNK 0x188
#define MT6370_REG_RGB1_TR 0x189
#define MT6370_REG_RGB_CHRIND_DIM 0x192
#define MT6370_REG_RGB_CHRIND_CTRL 0x193
#define MT6370_REG_RGB_CHRIND_TR 0x194
#define MT6372_REG_RGB_EN 0x182
#define MT6372_REG_RGB1_ISNK 0x183
#define MT6372_REG_RGB2_ISNK 0x184
#define MT6372_REG_RGB3_ISNK 0x185
#define MT6372_REG_RGB4_ISNK 0x186
#define MT6372_REG_RGB1_DIM 0x187
#define MT6372_REG_RGB2_DIM 0x188
#define MT6372_REG_RGB3_DIM 0x189
#define MT6372_REG_RGB4_DIM 0x18A
#define MT6372_REG_RGB12_FREQ 0x18B
#define MT6372_REG_RGB34_FREQ 0x18C
#define MT6372_REG_RGB1_TR 0x18D
#define MT6370_VENDOR_ID_MASK GENMASK(7, 4)
#define MT6372_VENDOR_ID 0x9
#define MT6372C_VENDOR_ID 0xb
#define MT6370_CHEN_BIT(id) BIT(MT6370_LED_ISNK4 - id)
#define MT6370_VIRTUAL_MULTICOLOR 5
#define MC_CHANNEL_NUM 3
#define MT6370_PWM_DUTY (BIT(5) - 1)
#define MT6372_PWM_DUTY (BIT(8) - 1)
struct mt6370_led {
/*
* If the color of the LED in DT is set to
* - 'LED_COLOR_ID_RGB'
* - 'LED_COLOR_ID_MULTI'
* The member 'index' of this struct will be set to
* 'MT6370_VIRTUAL_MULTICOLOR'.
* If so, this LED will choose 'struct led_classdev_mc mc' to use.
* Instead, if the member 'index' of this struct is set to
* 'MT6370_LED_ISNK1' ~ 'MT6370_LED_ISNK4', then this LED will choose
* 'struct led_classdev isink' to use.
*/
union {
struct led_classdev isink;
struct led_classdev_mc mc;
};
struct mt6370_priv *priv;
enum led_default_state default_state;
u32 index;
};
struct mt6370_pdata {
const unsigned int *tfreq;
unsigned int tfreq_len;
u16 reg_rgb1_tr;
s16 reg_rgb_chrind_tr;
u8 pwm_duty;
};
struct mt6370_priv {
/* Per LED access lock */
struct mutex lock;
struct regmap *regmap;
struct regmap_field *fields[F_MAX_FIELDS];
const struct reg_field *reg_fields;
const struct linear_range *ranges;
struct reg_cfg *reg_cfgs;
const struct mt6370_pdata *pdata;
unsigned int leds_count;
unsigned int leds_active;
struct mt6370_led leds[];
};
static const struct reg_field common_reg_fields[F_MAX_FIELDS] = {
[F_RGB_EN] = REG_FIELD(MT6370_REG_RGB_EN, 4, 7),
[F_CHGIND_EN] = REG_FIELD(MT6370_REG_RGB_CHRIND_DIM, 7, 7),
[F_LED1_CURR] = REG_FIELD(MT6370_REG_RGB1_ISNK, 0, 2),
[F_LED2_CURR] = REG_FIELD(MT6370_REG_RGB2_ISNK, 0, 2),
[F_LED3_CURR] = REG_FIELD(MT6370_REG_RGB3_ISNK, 0, 2),
[F_LED4_CURR] = REG_FIELD(MT6370_REG_RGB_CHRIND_CTRL, 0, 1),
[F_LED1_MODE] = REG_FIELD(MT6370_REG_RGB1_DIM, 5, 6),
[F_LED2_MODE] = REG_FIELD(MT6370_REG_RGB2_DIM, 5, 6),
[F_LED3_MODE] = REG_FIELD(MT6370_REG_RGB3_DIM, 5, 6),
[F_LED4_MODE] = REG_FIELD(MT6370_REG_RGB_CHRIND_DIM, 5, 6),
[F_LED1_DUTY] = REG_FIELD(MT6370_REG_RGB1_DIM, 0, 4),
[F_LED2_DUTY] = REG_FIELD(MT6370_REG_RGB2_DIM, 0, 4),
[F_LED3_DUTY] = REG_FIELD(MT6370_REG_RGB3_DIM, 0, 4),
[F_LED4_DUTY] = REG_FIELD(MT6370_REG_RGB_CHRIND_DIM, 0, 4),
[F_LED1_FREQ] = REG_FIELD(MT6370_REG_RGB1_ISNK, 3, 5),
[F_LED2_FREQ] = REG_FIELD(MT6370_REG_RGB2_ISNK, 3, 5),
[F_LED3_FREQ] = REG_FIELD(MT6370_REG_RGB3_ISNK, 3, 5),
[F_LED4_FREQ] = REG_FIELD(MT6370_REG_RGB_CHRIND_CTRL, 2, 4),
};
static const struct reg_field mt6372_reg_fields[F_MAX_FIELDS] = {
[F_RGB_EN] = REG_FIELD(MT6372_REG_RGB_EN, 4, 7),
[F_CHGIND_EN] = REG_FIELD(MT6372_REG_RGB_EN, 3, 3),
[F_LED1_CURR] = REG_FIELD(MT6372_REG_RGB1_ISNK, 0, 3),
[F_LED2_CURR] = REG_FIELD(MT6372_REG_RGB2_ISNK, 0, 3),
[F_LED3_CURR] = REG_FIELD(MT6372_REG_RGB3_ISNK, 0, 3),
[F_LED4_CURR] = REG_FIELD(MT6372_REG_RGB4_ISNK, 0, 3),
[F_LED1_MODE] = REG_FIELD(MT6372_REG_RGB1_ISNK, 6, 7),
[F_LED2_MODE] = REG_FIELD(MT6372_REG_RGB2_ISNK, 6, 7),
[F_LED3_MODE] = REG_FIELD(MT6372_REG_RGB3_ISNK, 6, 7),
[F_LED4_MODE] = REG_FIELD(MT6372_REG_RGB4_ISNK, 6, 7),
[F_LED1_DUTY] = REG_FIELD(MT6372_REG_RGB1_DIM, 0, 7),
[F_LED2_DUTY] = REG_FIELD(MT6372_REG_RGB2_DIM, 0, 7),
[F_LED3_DUTY] = REG_FIELD(MT6372_REG_RGB3_DIM, 0, 7),
[F_LED4_DUTY] = REG_FIELD(MT6372_REG_RGB4_DIM, 0, 7),
[F_LED1_FREQ] = REG_FIELD(MT6372_REG_RGB12_FREQ, 5, 7),
[F_LED2_FREQ] = REG_FIELD(MT6372_REG_RGB12_FREQ, 2, 4),
[F_LED3_FREQ] = REG_FIELD(MT6372_REG_RGB34_FREQ, 5, 7),
[F_LED4_FREQ] = REG_FIELD(MT6372_REG_RGB34_FREQ, 2, 4),
};
/* Current unit: microamp, time unit: millisecond */
static const struct linear_range common_led_ranges[R_MAX_RANGES] = {
[R_LED123_CURR] = { 4000, 1, 6, 4000 },
[R_LED4_CURR] = { 2000, 1, 3, 2000 },
[R_LED_TRFON] = { 125, 0, 15, 200 },
[R_LED_TOFF] = { 250, 0, 15, 400 },
};
static const struct linear_range mt6372_led_ranges[R_MAX_RANGES] = {
[R_LED123_CURR] = { 2000, 1, 14, 2000 },
[R_LED4_CURR] = { 2000, 1, 14, 2000 },
[R_LED_TRFON] = { 125, 0, 15, 250 },
[R_LED_TOFF] = { 250, 0, 15, 500 },
};
static const unsigned int common_tfreqs[] = {
10000, 5000, 2000, 1000, 500, 200, 5, 1,
};
static const unsigned int mt6372_tfreqs[] = {
8000, 4000, 2000, 1000, 500, 250, 8, 4,
};
static const struct mt6370_pdata common_pdata = {
.tfreq = common_tfreqs,
.tfreq_len = ARRAY_SIZE(common_tfreqs),
.pwm_duty = MT6370_PWM_DUTY,
.reg_rgb1_tr = MT6370_REG_RGB1_TR,
.reg_rgb_chrind_tr = MT6370_REG_RGB_CHRIND_TR,
};
static const struct mt6370_pdata mt6372_pdata = {
.tfreq = mt6372_tfreqs,
.tfreq_len = ARRAY_SIZE(mt6372_tfreqs),
.pwm_duty = MT6372_PWM_DUTY,
.reg_rgb1_tr = MT6372_REG_RGB1_TR,
.reg_rgb_chrind_tr = -1,
};
static enum mt6370_led_field mt6370_get_led_current_field(unsigned int led_no)
{
switch (led_no) {
case MT6370_LED_ISNK1:
return F_LED1_CURR;
case MT6370_LED_ISNK2:
return F_LED2_CURR;
case MT6370_LED_ISNK3:
return F_LED3_CURR;
default:
return F_LED4_CURR;
}
}
static int mt6370_set_led_brightness(struct mt6370_priv *priv, unsigned int led_no,
unsigned int level)
{
enum mt6370_led_field sel_field;
sel_field = mt6370_get_led_current_field(led_no);
return regmap_field_write(priv->fields[sel_field], level);
}
static int mt6370_get_led_brightness(struct mt6370_priv *priv, unsigned int led_no,
unsigned int *level)
{
enum mt6370_led_field sel_field;
sel_field = mt6370_get_led_current_field(led_no);
return regmap_field_read(priv->fields[sel_field], level);
}
static int mt6370_set_led_duty(struct mt6370_priv *priv, unsigned int led_no, unsigned int ton,
unsigned int toff)
{
const struct mt6370_pdata *pdata = priv->pdata;
enum mt6370_led_field sel_field;
unsigned int divisor, ratio;
divisor = pdata->pwm_duty;
ratio = ton * divisor / (ton + toff);
switch (led_no) {
case MT6370_LED_ISNK1:
sel_field = F_LED1_DUTY;
break;
case MT6370_LED_ISNK2:
sel_field = F_LED2_DUTY;
break;
case MT6370_LED_ISNK3:
sel_field = F_LED3_DUTY;
break;
default:
sel_field = F_LED4_DUTY;
break;
}
return regmap_field_write(priv->fields[sel_field], ratio);
}
static int mt6370_set_led_freq(struct mt6370_priv *priv, unsigned int led_no, unsigned int ton,
unsigned int toff)
{
const struct mt6370_pdata *pdata = priv->pdata;
enum mt6370_led_field sel_field;
unsigned int tfreq_len = pdata->tfreq_len;
unsigned int tsum, sel;
tsum = ton + toff;
if (tsum > pdata->tfreq[0] || tsum < pdata->tfreq[tfreq_len - 1])
return -EOPNOTSUPP;
sel = find_closest_descending(tsum, pdata->tfreq, tfreq_len);
switch (led_no) {
case MT6370_LED_ISNK1:
sel_field = F_LED1_FREQ;
break;
case MT6370_LED_ISNK2:
sel_field = F_LED2_FREQ;
break;
case MT6370_LED_ISNK3:
sel_field = F_LED3_FREQ;
break;
default:
sel_field = F_LED4_FREQ;
break;
}
return regmap_field_write(priv->fields[sel_field], sel);
}
static void mt6370_get_breath_reg_base(struct mt6370_priv *priv, unsigned int led_no,
unsigned int *base)
{
const struct mt6370_pdata *pdata = priv->pdata;
if (pdata->reg_rgb_chrind_tr < 0) {
*base = pdata->reg_rgb1_tr + led_no * 3;
return;
}
switch (led_no) {
case MT6370_LED_ISNK1:
case MT6370_LED_ISNK2:
case MT6370_LED_ISNK3:
*base = pdata->reg_rgb1_tr + led_no * 3;
break;
default:
*base = pdata->reg_rgb_chrind_tr;
break;
}
}
static int mt6370_gen_breath_pattern(struct mt6370_priv *priv, struct led_pattern *pattern, u32 len,
u8 *pattern_val, u32 val_len)
{
enum mt6370_led_ranges sel_range;
struct led_pattern *curr;
unsigned int sel;
u32 val = 0;
int i;
if (len < P_MAX_PATTERNS && val_len < P_MAX_PATTERNS / 2)
return -EINVAL;
/*
* Pattern list
* tr1: byte 0, b'[7:4]
* tr2: byte 0, b'[3:0]
* tf1: byte 1, b'[7:4]
* tf2: byte 1, b'[3:0]
* ton: byte 2, b'[7:4]
* toff: byte 2, b'[3:0]
*/
for (i = 0; i < P_MAX_PATTERNS; i++) {
curr = pattern + i;
sel_range = i == P_LED_TOFF ? R_LED_TOFF : R_LED_TRFON;
linear_range_get_selector_within(priv->ranges + sel_range, curr->delta_t, &sel);
if (i % 2) {
val |= sel;
} else {
val <<= 8;
val |= sel << 4;
}
}
put_unaligned_be24(val, pattern_val);
return 0;
}
static int mt6370_set_led_mode(struct mt6370_priv *priv, unsigned int led_no,
enum mt6370_led_mode mode)
{
enum mt6370_led_field sel_field;
switch (led_no) {
case MT6370_LED_ISNK1:
sel_field = F_LED1_MODE;
break;
case MT6370_LED_ISNK2:
sel_field = F_LED2_MODE;
break;
case MT6370_LED_ISNK3:
sel_field = F_LED3_MODE;
break;
default:
sel_field = F_LED4_MODE;
break;
}
return regmap_field_write(priv->fields[sel_field], mode);
}
static int mt6370_mc_brightness_set(struct led_classdev *lcdev, enum led_brightness level)
{
struct led_classdev_mc *mccdev = lcdev_to_mccdev(lcdev);
struct mt6370_led *led = container_of(mccdev, struct mt6370_led, mc);
struct mt6370_priv *priv = led->priv;
struct mc_subled *subled;
unsigned int enable, disable;
int i, ret;
mutex_lock(&priv->lock);
led_mc_calc_color_components(mccdev, level);
ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
if (ret)
goto out_unlock;
disable = enable;
for (i = 0; i < mccdev->num_colors; i++) {
u32 brightness;
subled = mccdev->subled_info + i;
brightness = min(subled->brightness, lcdev->max_brightness);
disable &= ~MT6370_CHEN_BIT(subled->channel);
if (level == 0) {
enable &= ~MT6370_CHEN_BIT(subled->channel);
ret = mt6370_set_led_mode(priv, subled->channel, MT6370_LED_REG_MODE);
if (ret)
goto out_unlock;
continue;
}
if (brightness == 0) {
enable &= ~MT6370_CHEN_BIT(subled->channel);
continue;
}
enable |= MT6370_CHEN_BIT(subled->channel);
ret = mt6370_set_led_brightness(priv, subled->channel, brightness);
if (ret)
goto out_unlock;
}
ret = regmap_field_write(priv->fields[F_RGB_EN], disable);
if (ret)
goto out_unlock;
ret = regmap_field_write(priv->fields[F_RGB_EN], enable);
out_unlock:
mutex_unlock(&priv->lock);
return ret;
}
static int mt6370_mc_blink_set(struct led_classdev *lcdev,
unsigned long *delay_on,
unsigned long *delay_off)
{
struct led_classdev_mc *mccdev = lcdev_to_mccdev(lcdev);
struct mt6370_led *led = container_of(mccdev, struct mt6370_led, mc);
struct mt6370_priv *priv = led->priv;
struct mc_subled *subled;
unsigned int enable, disable;
int i, ret;
mutex_lock(&priv->lock);
if (!*delay_on && !*delay_off)
*delay_on = *delay_off = 500;
ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
if (ret)
goto out_unlock;
disable = enable;
for (i = 0; i < mccdev->num_colors; i++) {
subled = mccdev->subled_info + i;
disable &= ~MT6370_CHEN_BIT(subled->channel);
ret = mt6370_set_led_duty(priv, subled->channel, *delay_on, *delay_off);
if (ret)
goto out_unlock;
ret = mt6370_set_led_freq(priv, subled->channel, *delay_on, *delay_off);
if (ret)
goto out_unlock;
ret = mt6370_set_led_mode(priv, subled->channel, MT6370_LED_PWM_MODE);
if (ret)
goto out_unlock;
}
/* Toggle to make pattern timing the same */
ret = regmap_field_write(priv->fields[F_RGB_EN], disable);
if (ret)
goto out_unlock;
ret = regmap_field_write(priv->fields[F_RGB_EN], enable);
out_unlock:
mutex_unlock(&priv->lock);
return ret;
}
static int mt6370_mc_pattern_set(struct led_classdev *lcdev, struct led_pattern *pattern, u32 len,
int repeat)
{
struct led_classdev_mc *mccdev = lcdev_to_mccdev(lcdev);
struct mt6370_led *led = container_of(mccdev, struct mt6370_led, mc);
struct mt6370_priv *priv = led->priv;
struct mc_subled *subled;
unsigned int reg_base, enable, disable;
u8 params[P_MAX_PATTERNS / 2];
int i, ret;
mutex_lock(&priv->lock);
ret = mt6370_gen_breath_pattern(priv, pattern, len, params, sizeof(params));
if (ret)
goto out_unlock;
ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
if (ret)
goto out_unlock;
disable = enable;
for (i = 0; i < mccdev->num_colors; i++) {
subled = mccdev->subled_info + i;
mt6370_get_breath_reg_base(priv, subled->channel, ®_base);
disable &= ~MT6370_CHEN_BIT(subled->channel);
ret = regmap_raw_write(priv->regmap, reg_base, params, sizeof(params));
if (ret)
goto out_unlock;
ret = mt6370_set_led_mode(priv, subled->channel, MT6370_LED_BREATH_MODE);
if (ret)
goto out_unlock;
}
/* Toggle to make pattern timing be the same */
ret = regmap_field_write(priv->fields[F_RGB_EN], disable);
if (ret)
goto out_unlock;
ret = regmap_field_write(priv->fields[F_RGB_EN], enable);
out_unlock:
mutex_unlock(&priv->lock);
return ret;
}
static inline int mt6370_mc_pattern_clear(struct led_classdev *lcdev)
{
struct led_classdev_mc *mccdev = lcdev_to_mccdev(lcdev);
struct mt6370_led *led = container_of(mccdev, struct mt6370_led, mc);
struct mt6370_priv *priv = led->priv;
struct mc_subled *subled;
int i, ret;
mutex_lock(&led->priv->lock);
for (i = 0; i < mccdev->num_colors; i++) {
subled = mccdev->subled_info + i;
ret = mt6370_set_led_mode(priv, subled->channel, MT6370_LED_REG_MODE);
if (ret)
break;
}
mutex_unlock(&led->priv->lock);
return ret;
}
static int mt6370_isnk_brightness_set(struct led_classdev *lcdev,
enum led_brightness level)
{
struct mt6370_led *led = container_of(lcdev, struct mt6370_led, isink);
struct mt6370_priv *priv = led->priv;
unsigned int enable;
int ret;
mutex_lock(&priv->lock);
ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
if (ret)
goto out_unlock;
if (level == 0) {
enable &= ~MT6370_CHEN_BIT(led->index);
ret = mt6370_set_led_mode(priv, led->index, MT6370_LED_REG_MODE);
if (ret)
goto out_unlock;
} else {
enable |= MT6370_CHEN_BIT(led->index);
ret = mt6370_set_led_brightness(priv, led->index, level);
if (ret)
goto out_unlock;
}
ret = regmap_field_write(priv->fields[F_RGB_EN], enable);
out_unlock:
mutex_unlock(&priv->lock);
return ret;
}
static int mt6370_isnk_blink_set(struct led_classdev *lcdev, unsigned long *delay_on,
unsigned long *delay_off)
{
struct mt6370_led *led = container_of(lcdev, struct mt6370_led, isink);
struct mt6370_priv *priv = led->priv;
int ret;
mutex_lock(&priv->lock);
if (!*delay_on && !*delay_off)
*delay_on = *delay_off = 500;
ret = mt6370_set_led_duty(priv, led->index, *delay_on, *delay_off);
if (ret)
goto out_unlock;
ret = mt6370_set_led_freq(priv, led->index, *delay_on, *delay_off);
if (ret)
goto out_unlock;
ret = mt6370_set_led_mode(priv, led->index, MT6370_LED_PWM_MODE);
out_unlock:
mutex_unlock(&priv->lock);
return ret;
}
static int mt6370_isnk_pattern_set(struct led_classdev *lcdev, struct led_pattern *pattern, u32 len,
int repeat)
{
struct mt6370_led *led = container_of(lcdev, struct mt6370_led, isink);
struct mt6370_priv *priv = led->priv;
unsigned int reg_base;
u8 params[P_MAX_PATTERNS / 2];
int ret;
mutex_lock(&priv->lock);
ret = mt6370_gen_breath_pattern(priv, pattern, len, params, sizeof(params));
if (ret)
goto out_unlock;
mt6370_get_breath_reg_base(priv, led->index, ®_base);
ret = regmap_raw_write(priv->regmap, reg_base, params, sizeof(params));
if (ret)
goto out_unlock;
ret = mt6370_set_led_mode(priv, led->index, MT6370_LED_BREATH_MODE);
out_unlock:
mutex_unlock(&priv->lock);
return ret;
}
static inline int mt6370_isnk_pattern_clear(struct led_classdev *lcdev)
{
struct mt6370_led *led = container_of(lcdev, struct mt6370_led, isink);
struct mt6370_priv *priv = led->priv;
int ret;
mutex_lock(&led->priv->lock);
ret = mt6370_set_led_mode(priv, led->index, MT6370_LED_REG_MODE);
mutex_unlock(&led->priv->lock);
return ret;
}
static int mt6370_assign_multicolor_info(struct device *dev, struct mt6370_led *led,
struct fwnode_handle *fwnode)
{
struct mt6370_priv *priv = led->priv;
struct fwnode_handle *child;
struct mc_subled *sub_led;
u32 num_color = 0;
int ret;
sub_led = devm_kcalloc(dev, MC_CHANNEL_NUM, sizeof(*sub_led), GFP_KERNEL);
if (!sub_led)
return -ENOMEM;
fwnode_for_each_child_node(fwnode, child) {
u32 reg, color;
ret = fwnode_property_read_u32(child, "reg", ®);
if (ret || reg > MT6370_LED_ISNK3 || priv->leds_active & BIT(reg)) {
fwnode_handle_put(child);
return -EINVAL;
}
ret = fwnode_property_read_u32(child, "color", &color);
if (ret) {
fwnode_handle_put(child);
return dev_err_probe(dev, ret, "LED %d, no color specified\n", led->index);
}
priv->leds_active |= BIT(reg);
sub_led[num_color].color_index = color;
sub_led[num_color].channel = reg;
sub_led[num_color].intensity = 0;
num_color++;
}
if (num_color < 2)
return dev_err_probe(dev, -EINVAL,
"Multicolor must include 2 or more LED channels\n");
led->mc.num_colors = num_color;
led->mc.subled_info = sub_led;
return 0;
}
static int mt6370_init_led_properties(struct device *dev, struct mt6370_led *led,
struct led_init_data *init_data)
{
struct mt6370_priv *priv = led->priv;
struct led_classdev *lcdev;
enum mt6370_led_ranges sel_range;
u32 max_uA, max_level;
int ret;
if (led->index == MT6370_VIRTUAL_MULTICOLOR) {
ret = mt6370_assign_multicolor_info(dev, led, init_data->fwnode);
if (ret)
return ret;
lcdev = &led->mc.led_cdev;
lcdev->brightness_set_blocking = mt6370_mc_brightness_set;
lcdev->blink_set = mt6370_mc_blink_set;
lcdev->pattern_set = mt6370_mc_pattern_set;
lcdev->pattern_clear = mt6370_mc_pattern_clear;
} else {
lcdev = &led->isink;
lcdev->brightness_set_blocking = mt6370_isnk_brightness_set;
lcdev->blink_set = mt6370_isnk_blink_set;
lcdev->pattern_set = mt6370_isnk_pattern_set;
lcdev->pattern_clear = mt6370_isnk_pattern_clear;
}
ret = fwnode_property_read_u32(init_data->fwnode, "led-max-microamp", &max_uA);
if (ret) {
dev_warn(dev, "Not specified led-max-microamp, config to the minimum\n");
max_uA = 0;
}
if (led->index == MT6370_LED_ISNK4)
sel_range = R_LED4_CURR;
else
sel_range = R_LED123_CURR;
linear_range_get_selector_within(priv->ranges + sel_range, max_uA, &max_level);
lcdev->max_brightness = max_level;
led->default_state = led_init_default_state_get(init_data->fwnode);
return 0;
}
static int mt6370_isnk_init_default_state(struct mt6370_led *led)
{
struct mt6370_priv *priv = led->priv;
unsigned int enable, level;
int ret;
ret = mt6370_get_led_brightness(priv, led->index, &level);
if (ret)
return ret;
ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
if (ret)
return ret;
if (!(enable & MT6370_CHEN_BIT(led->index)))
level = 0;
switch (led->default_state) {
case LEDS_DEFSTATE_ON:
led->isink.brightness = led->isink.max_brightness;
break;
case LEDS_DEFSTATE_KEEP:
led->isink.brightness = min(level, led->isink.max_brightness);
break;
default:
led->isink.brightness = 0;
break;
}
return mt6370_isnk_brightness_set(&led->isink, led->isink.brightness);
}
static int mt6370_multicolor_led_register(struct device *dev, struct mt6370_led *led,
struct led_init_data *init_data)
{
int ret;
ret = mt6370_mc_brightness_set(&led->mc.led_cdev, 0);
if (ret)
return dev_err_probe(dev, ret, "Couldn't set multicolor brightness\n");
ret = devm_led_classdev_multicolor_register_ext(dev, &led->mc, init_data);
if (ret)
return dev_err_probe(dev, ret, "Couldn't register multicolor\n");
return 0;
}
static int mt6370_led_register(struct device *dev, struct mt6370_led *led,
struct led_init_data *init_data)
{
struct mt6370_priv *priv = led->priv;
int ret;
if (led->index == MT6370_VIRTUAL_MULTICOLOR)
return mt6370_multicolor_led_register(dev, led, init_data);
/* If ISNK4 is declared, change its mode from HW auto to SW control */
if (led->index == MT6370_LED_ISNK4) {
ret = regmap_field_write(priv->fields[F_CHGIND_EN], 1);
if (ret)
return dev_err_probe(dev, ret, "Failed to set CHRIND to SW\n");
}
ret = mt6370_isnk_init_default_state(led);
if (ret)
return dev_err_probe(dev, ret, "Failed to init %d isnk state\n", led->index);
ret = devm_led_classdev_register_ext(dev, &led->isink, init_data);
if (ret)
return dev_err_probe(dev, ret, "Couldn't register isink %d\n", led->index);
return 0;
}
static int mt6370_check_vendor_info(struct mt6370_priv *priv)
{
unsigned int devinfo, vid;
int ret;
ret = regmap_read(priv->regmap, MT6370_REG_DEV_INFO, &devinfo);
if (ret)
return ret;
vid = FIELD_GET(MT6370_VENDOR_ID_MASK, devinfo);
if (vid == MT6372_VENDOR_ID || vid == MT6372C_VENDOR_ID) {
priv->reg_fields = mt6372_reg_fields;
priv->ranges = mt6372_led_ranges;
priv->pdata = &mt6372_pdata;
} else {
/* Common for MT6370/71 */
priv->reg_fields = common_reg_fields;
priv->ranges = common_led_ranges;
priv->pdata = &common_pdata;
}
return 0;
}
static int mt6370_leds_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct mt6370_priv *priv;
struct fwnode_handle *child;
size_t count;
unsigned int i = 0;
int ret;
count = device_get_child_node_count(dev);
if (!count || count > MT6370_MAX_LEDS)
return dev_err_probe(dev, -EINVAL,
"No child node or node count over max LED number %zu\n",
count);
priv = devm_kzalloc(dev, struct_size(priv, leds, count), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->leds_count = count;
mutex_init(&priv->lock);
priv->regmap = dev_get_regmap(dev->parent, NULL);
if (!priv->regmap)
return dev_err_probe(dev, -ENODEV, "Failed to get parent regmap\n");
ret = mt6370_check_vendor_info(priv);
if (ret)
return dev_err_probe(dev, ret, "Failed to check vendor info\n");
ret = devm_regmap_field_bulk_alloc(dev, priv->regmap, priv->fields, priv->reg_fields,
F_MAX_FIELDS);
if (ret)
return dev_err_probe(dev, ret, "Failed to allocate regmap field\n");
device_for_each_child_node(dev, child) {
struct mt6370_led *led = priv->leds + i++;
struct led_init_data init_data = { .fwnode = child };
u32 reg, color;
ret = fwnode_property_read_u32(child, "reg", ®);
if (ret) {
dev_err(dev, "Failed to parse reg property\n");
goto fwnode_release;
}
if (reg >= MT6370_MAX_LEDS) {
ret = -EINVAL;
dev_err(dev, "Error reg property number\n");
goto fwnode_release;
}
ret = fwnode_property_read_u32(child, "color", &color);
if (ret) {
dev_err(dev, "Failed to parse color property\n");
goto fwnode_release;
}
if (color == LED_COLOR_ID_RGB || color == LED_COLOR_ID_MULTI)
reg = MT6370_VIRTUAL_MULTICOLOR;
if (priv->leds_active & BIT(reg)) {
ret = -EINVAL;
dev_err(dev, "Duplicate reg property\n");
goto fwnode_release;
}
priv->leds_active |= BIT(reg);
led->index = reg;
led->priv = priv;
ret = mt6370_init_led_properties(dev, led, &init_data);
if (ret)
goto fwnode_release;
ret = mt6370_led_register(dev, led, &init_data);
if (ret)
goto fwnode_release;
}
return 0;
fwnode_release:
fwnode_handle_put(child);
return ret;
}
static const struct of_device_id mt6370_rgbled_device_table[] = {
{ .compatible = "mediatek,mt6370-indicator" },
{}
};
MODULE_DEVICE_TABLE(of, mt6370_rgbled_device_table);
static struct platform_driver mt6370_rgbled_driver = {
.driver = {
.name = "mt6370-indicator",
.of_match_table = mt6370_rgbled_device_table,
},
.probe = mt6370_leds_probe,
};
module_platform_driver(mt6370_rgbled_driver);
MODULE_AUTHOR("Alice Chen <[email protected]>");
MODULE_AUTHOR("ChiYuan Huang <[email protected]>");
MODULE_DESCRIPTION("MediaTek MT6370 RGB LED Driver");
MODULE_LICENSE("GPL");
| linux-master | drivers/leds/rgb/leds-mt6370-rgb.c |
// SPDX-License-Identifier: GPL-2.0
/*
* Siemens SIMATIC IPC driver for GPIO based LEDs
*
* Copyright (c) Siemens AG, 2023
*
* Author:
* Henning Schild <[email protected]>
*/
#include <linux/gpio/machine.h>
#include <linux/gpio/consumer.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/platform_data/x86/simatic-ipc-base.h>
#include "simatic-ipc-leds-gpio.h"
static struct gpiod_lookup_table simatic_ipc_led_gpio_table = {
.dev_id = "leds-gpio",
.table = {
GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 52, NULL, 0, GPIO_ACTIVE_LOW),
GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 53, NULL, 1, GPIO_ACTIVE_LOW),
GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 57, NULL, 2, GPIO_ACTIVE_LOW),
GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 58, NULL, 3, GPIO_ACTIVE_LOW),
GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 60, NULL, 4, GPIO_ACTIVE_LOW),
GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 51, NULL, 5, GPIO_ACTIVE_LOW),
{} /* Terminating entry */
},
};
static struct gpiod_lookup_table simatic_ipc_led_gpio_table_extra = {
.dev_id = NULL, /* Filled during initialization */
.table = {
GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 56, NULL, 6, GPIO_ACTIVE_LOW),
GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 59, NULL, 7, GPIO_ACTIVE_HIGH),
{} /* Terminating entry */
},
};
static int simatic_ipc_leds_gpio_apollolake_probe(struct platform_device *pdev)
{
return simatic_ipc_leds_gpio_probe(pdev, &simatic_ipc_led_gpio_table,
&simatic_ipc_led_gpio_table_extra);
}
static int simatic_ipc_leds_gpio_apollolake_remove(struct platform_device *pdev)
{
return simatic_ipc_leds_gpio_remove(pdev, &simatic_ipc_led_gpio_table,
&simatic_ipc_led_gpio_table_extra);
}
static struct platform_driver simatic_ipc_led_gpio_apollolake_driver = {
.probe = simatic_ipc_leds_gpio_apollolake_probe,
.remove = simatic_ipc_leds_gpio_apollolake_remove,
.driver = {
.name = KBUILD_MODNAME,
},
};
module_platform_driver(simatic_ipc_led_gpio_apollolake_driver);
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:" KBUILD_MODNAME);
MODULE_SOFTDEP("pre: simatic-ipc-leds-gpio-core platform:apollolake-pinctrl");
MODULE_AUTHOR("Henning Schild <[email protected]>");
| linux-master | drivers/leds/simple/simatic-ipc-leds-gpio-apollolake.c |
// SPDX-License-Identifier: GPL-2.0
/*
* Siemens SIMATIC IPC driver for GPIO based LEDs
*
* Copyright (c) Siemens AG, 2023
*
* Author:
* Henning Schild <[email protected]>
*/
#include <linux/gpio/machine.h>
#include <linux/gpio/consumer.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/platform_data/x86/simatic-ipc-base.h>
#include "simatic-ipc-leds-gpio.h"
static struct gpiod_lookup_table simatic_ipc_led_gpio_table = {
.dev_id = "leds-gpio",
.table = {
GPIO_LOOKUP_IDX("gpio-f7188x-2", 0, NULL, 0, GPIO_ACTIVE_LOW),
GPIO_LOOKUP_IDX("gpio-f7188x-2", 1, NULL, 1, GPIO_ACTIVE_LOW),
GPIO_LOOKUP_IDX("gpio-f7188x-2", 2, NULL, 2, GPIO_ACTIVE_LOW),
GPIO_LOOKUP_IDX("gpio-f7188x-2", 3, NULL, 3, GPIO_ACTIVE_LOW),
GPIO_LOOKUP_IDX("gpio-f7188x-2", 4, NULL, 4, GPIO_ACTIVE_LOW),
GPIO_LOOKUP_IDX("gpio-f7188x-2", 5, NULL, 5, GPIO_ACTIVE_LOW),
{} /* Terminating entry */
},
};
static struct gpiod_lookup_table simatic_ipc_led_gpio_table_extra = {
.dev_id = NULL, /* Filled during initialization */
.table = {
GPIO_LOOKUP_IDX("gpio-f7188x-3", 6, NULL, 6, GPIO_ACTIVE_HIGH),
GPIO_LOOKUP_IDX("gpio-f7188x-3", 7, NULL, 7, GPIO_ACTIVE_HIGH),
{} /* Terminating entry */
},
};
static int simatic_ipc_leds_gpio_f7188x_probe(struct platform_device *pdev)
{
return simatic_ipc_leds_gpio_probe(pdev, &simatic_ipc_led_gpio_table,
&simatic_ipc_led_gpio_table_extra);
}
static int simatic_ipc_leds_gpio_f7188x_remove(struct platform_device *pdev)
{
return simatic_ipc_leds_gpio_remove(pdev, &simatic_ipc_led_gpio_table,
&simatic_ipc_led_gpio_table_extra);
}
static struct platform_driver simatic_ipc_led_gpio_driver = {
.probe = simatic_ipc_leds_gpio_f7188x_probe,
.remove = simatic_ipc_leds_gpio_f7188x_remove,
.driver = {
.name = KBUILD_MODNAME,
},
};
module_platform_driver(simatic_ipc_led_gpio_driver);
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:" KBUILD_MODNAME);
MODULE_SOFTDEP("pre: simatic-ipc-leds-gpio-core gpio_f7188x");
MODULE_AUTHOR("Henning Schild <[email protected]>");
| linux-master | drivers/leds/simple/simatic-ipc-leds-gpio-f7188x.c |
// SPDX-License-Identifier: GPL-2.0
/*
* Siemens SIMATIC IPC driver for GPIO based LEDs
*
* Copyright (c) Siemens AG, 2023
*
* Author:
* Henning Schild <[email protected]>
*/
#include <linux/gpio/machine.h>
#include <linux/gpio/consumer.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/platform_data/x86/simatic-ipc-base.h>
#include "simatic-ipc-leds-gpio.h"
static struct gpiod_lookup_table simatic_ipc_led_gpio_table = {
.dev_id = "leds-gpio",
.table = {
GPIO_LOOKUP_IDX("INTC1020:04", 72, NULL, 0, GPIO_ACTIVE_HIGH),
GPIO_LOOKUP_IDX("INTC1020:04", 77, NULL, 1, GPIO_ACTIVE_HIGH),
GPIO_LOOKUP_IDX("INTC1020:04", 78, NULL, 2, GPIO_ACTIVE_HIGH),
GPIO_LOOKUP_IDX("INTC1020:04", 58, NULL, 3, GPIO_ACTIVE_HIGH),
GPIO_LOOKUP_IDX("INTC1020:04", 60, NULL, 4, GPIO_ACTIVE_HIGH),
GPIO_LOOKUP_IDX("INTC1020:04", 62, NULL, 5, GPIO_ACTIVE_HIGH),
{} /* Terminating entry */
},
};
static int simatic_ipc_leds_gpio_elkhartlake_probe(struct platform_device *pdev)
{
return simatic_ipc_leds_gpio_probe(pdev, &simatic_ipc_led_gpio_table,
NULL);
}
static int simatic_ipc_leds_gpio_elkhartlake_remove(struct platform_device *pdev)
{
return simatic_ipc_leds_gpio_remove(pdev, &simatic_ipc_led_gpio_table,
NULL);
}
static struct platform_driver simatic_ipc_led_gpio_elkhartlake_driver = {
.probe = simatic_ipc_leds_gpio_elkhartlake_probe,
.remove = simatic_ipc_leds_gpio_elkhartlake_remove,
.driver = {
.name = KBUILD_MODNAME,
},
};
module_platform_driver(simatic_ipc_led_gpio_elkhartlake_driver);
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:" KBUILD_MODNAME);
MODULE_SOFTDEP("pre: simatic-ipc-leds-gpio-core platform:elkhartlake-pinctrl");
MODULE_AUTHOR("Henning Schild <[email protected]>");
| linux-master | drivers/leds/simple/simatic-ipc-leds-gpio-elkhartlake.c |
// SPDX-License-Identifier: GPL-2.0
/*
* Siemens SIMATIC IPC driver for LEDs
*
* Copyright (c) Siemens AG, 2018-2021
*
* Authors:
* Henning Schild <[email protected]>
* Jan Kiszka <[email protected]>
* Gerd Haeussler <[email protected]>
*/
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/platform_data/x86/simatic-ipc-base.h>
#include <linux/platform_device.h>
#include <linux/sizes.h>
#include <linux/spinlock.h>
#define SIMATIC_IPC_LED_PORT_BASE 0x404E
struct simatic_ipc_led {
unsigned int value; /* mask for io */
char *name;
struct led_classdev cdev;
};
static struct simatic_ipc_led simatic_ipc_leds_io[] = {
{1 << 15, "green:" LED_FUNCTION_STATUS "-1" },
{1 << 7, "yellow:" LED_FUNCTION_STATUS "-1" },
{1 << 14, "red:" LED_FUNCTION_STATUS "-2" },
{1 << 6, "yellow:" LED_FUNCTION_STATUS "-2" },
{1 << 13, "red:" LED_FUNCTION_STATUS "-3" },
{1 << 5, "yellow:" LED_FUNCTION_STATUS "-3" },
{ }
};
static struct resource simatic_ipc_led_io_res =
DEFINE_RES_IO_NAMED(SIMATIC_IPC_LED_PORT_BASE, SZ_2, KBUILD_MODNAME);
static DEFINE_SPINLOCK(reg_lock);
static inline struct simatic_ipc_led *cdev_to_led(struct led_classdev *led_cd)
{
return container_of(led_cd, struct simatic_ipc_led, cdev);
}
static void simatic_ipc_led_set_io(struct led_classdev *led_cd,
enum led_brightness brightness)
{
struct simatic_ipc_led *led = cdev_to_led(led_cd);
unsigned long flags;
unsigned int val;
spin_lock_irqsave(®_lock, flags);
val = inw(SIMATIC_IPC_LED_PORT_BASE);
if (brightness == LED_OFF)
outw(val | led->value, SIMATIC_IPC_LED_PORT_BASE);
else
outw(val & ~led->value, SIMATIC_IPC_LED_PORT_BASE);
spin_unlock_irqrestore(®_lock, flags);
}
static enum led_brightness simatic_ipc_led_get_io(struct led_classdev *led_cd)
{
struct simatic_ipc_led *led = cdev_to_led(led_cd);
return inw(SIMATIC_IPC_LED_PORT_BASE) & led->value ? LED_OFF : led_cd->max_brightness;
}
static int simatic_ipc_leds_probe(struct platform_device *pdev)
{
const struct simatic_ipc_platform *plat = pdev->dev.platform_data;
struct device *dev = &pdev->dev;
struct simatic_ipc_led *ipcled;
struct led_classdev *cdev;
struct resource *res;
int err;
switch (plat->devmode) {
case SIMATIC_IPC_DEVICE_227D:
case SIMATIC_IPC_DEVICE_427E:
res = &simatic_ipc_led_io_res;
ipcled = simatic_ipc_leds_io;
/* on 227D the two bytes work the other way araound */
if (plat->devmode == SIMATIC_IPC_DEVICE_227D) {
while (ipcled->value) {
ipcled->value = swab16(ipcled->value);
ipcled++;
}
ipcled = simatic_ipc_leds_io;
}
if (!devm_request_region(dev, res->start, resource_size(res), KBUILD_MODNAME)) {
dev_err(dev, "Unable to register IO resource at %pR\n", res);
return -EBUSY;
}
break;
default:
return -ENODEV;
}
while (ipcled->value) {
cdev = &ipcled->cdev;
cdev->brightness_set = simatic_ipc_led_set_io;
cdev->brightness_get = simatic_ipc_led_get_io;
cdev->max_brightness = LED_ON;
cdev->name = ipcled->name;
err = devm_led_classdev_register(dev, cdev);
if (err < 0)
return err;
ipcled++;
}
return 0;
}
static struct platform_driver simatic_ipc_led_driver = {
.probe = simatic_ipc_leds_probe,
.driver = {
.name = KBUILD_MODNAME,
}
};
module_platform_driver(simatic_ipc_led_driver);
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:" KBUILD_MODNAME);
MODULE_AUTHOR("Henning Schild <[email protected]>");
| linux-master | drivers/leds/simple/simatic-ipc-leds.c |
// SPDX-License-Identifier: GPL-2.0
/*
* Siemens SIMATIC IPC driver for GPIO based LEDs
*
* Copyright (c) Siemens AG, 2023
*
* Author:
* Henning Schild <[email protected]>
*/
#include <linux/gpio/machine.h>
#include <linux/gpio/consumer.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/platform_data/x86/simatic-ipc-base.h>
#include "simatic-ipc-leds-gpio.h"
static struct platform_device *simatic_leds_pdev;
static const struct gpio_led simatic_ipc_gpio_leds[] = {
{ .name = "red:" LED_FUNCTION_STATUS "-1" },
{ .name = "green:" LED_FUNCTION_STATUS "-1" },
{ .name = "red:" LED_FUNCTION_STATUS "-2" },
{ .name = "green:" LED_FUNCTION_STATUS "-2" },
{ .name = "red:" LED_FUNCTION_STATUS "-3" },
{ .name = "green:" LED_FUNCTION_STATUS "-3" },
};
static const struct gpio_led_platform_data simatic_ipc_gpio_leds_pdata = {
.num_leds = ARRAY_SIZE(simatic_ipc_gpio_leds),
.leds = simatic_ipc_gpio_leds,
};
int simatic_ipc_leds_gpio_remove(struct platform_device *pdev,
struct gpiod_lookup_table *table,
struct gpiod_lookup_table *table_extra)
{
gpiod_remove_lookup_table(table);
gpiod_remove_lookup_table(table_extra);
platform_device_unregister(simatic_leds_pdev);
return 0;
}
EXPORT_SYMBOL_GPL(simatic_ipc_leds_gpio_remove);
int simatic_ipc_leds_gpio_probe(struct platform_device *pdev,
struct gpiod_lookup_table *table,
struct gpiod_lookup_table *table_extra)
{
const struct simatic_ipc_platform *plat = pdev->dev.platform_data;
struct device *dev = &pdev->dev;
struct gpio_desc *gpiod;
int err;
switch (plat->devmode) {
case SIMATIC_IPC_DEVICE_127E:
case SIMATIC_IPC_DEVICE_227G:
case SIMATIC_IPC_DEVICE_BX_21A:
break;
default:
return -ENODEV;
}
gpiod_add_lookup_table(table);
simatic_leds_pdev = platform_device_register_resndata(NULL,
"leds-gpio", PLATFORM_DEVID_NONE, NULL, 0,
&simatic_ipc_gpio_leds_pdata,
sizeof(simatic_ipc_gpio_leds_pdata));
if (IS_ERR(simatic_leds_pdev)) {
err = PTR_ERR(simatic_leds_pdev);
goto out;
}
if (!table_extra)
return 0;
table_extra->dev_id = dev_name(dev);
gpiod_add_lookup_table(table_extra);
/* PM_BIOS_BOOT_N */
gpiod = gpiod_get_index(dev, NULL, 6, GPIOD_OUT_LOW);
if (IS_ERR(gpiod)) {
err = PTR_ERR(gpiod);
goto out;
}
gpiod_put(gpiod);
/* PM_WDT_OUT */
gpiod = gpiod_get_index(dev, NULL, 7, GPIOD_OUT_LOW);
if (IS_ERR(gpiod)) {
err = PTR_ERR(gpiod);
goto out;
}
gpiod_put(gpiod);
return 0;
out:
simatic_ipc_leds_gpio_remove(pdev, table, table_extra);
return err;
}
EXPORT_SYMBOL_GPL(simatic_ipc_leds_gpio_probe);
MODULE_LICENSE("GPL v2");
MODULE_SOFTDEP("pre: platform:leds-gpio");
MODULE_AUTHOR("Henning Schild <[email protected]>");
| linux-master | drivers/leds/simple/simatic-ipc-leds-gpio-core.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* drivers/leds/leds-as3645a.c - AS3645A and LM3555 flash controllers driver
*
* Copyright (C) 2008-2011 Nokia Corporation
* Copyright (c) 2011, 2017 Intel Corporation.
*
* Based on drivers/media/i2c/as3645a.c.
*
* Contact: Sakari Ailus <[email protected]>
*/
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/led-class-flash.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/property.h>
#include <linux/slab.h>
#include <media/v4l2-flash-led-class.h>
#define AS_TIMER_US_TO_CODE(t) (((t) / 1000 - 100) / 50)
#define AS_TIMER_CODE_TO_US(c) ((50 * (c) + 100) * 1000)
/* Register definitions */
/* Read-only Design info register: Reset state: xxxx 0001 */
#define AS_DESIGN_INFO_REG 0x00
#define AS_DESIGN_INFO_FACTORY(x) (((x) >> 4))
#define AS_DESIGN_INFO_MODEL(x) ((x) & 0x0f)
/* Read-only Version control register: Reset state: 0000 0000
* for first engineering samples
*/
#define AS_VERSION_CONTROL_REG 0x01
#define AS_VERSION_CONTROL_RFU(x) (((x) >> 4))
#define AS_VERSION_CONTROL_VERSION(x) ((x) & 0x0f)
/* Read / Write (Indicator and timer register): Reset state: 0000 1111 */
#define AS_INDICATOR_AND_TIMER_REG 0x02
#define AS_INDICATOR_AND_TIMER_TIMEOUT_SHIFT 0
#define AS_INDICATOR_AND_TIMER_VREF_SHIFT 4
#define AS_INDICATOR_AND_TIMER_INDICATOR_SHIFT 6
/* Read / Write (Current set register): Reset state: 0110 1001 */
#define AS_CURRENT_SET_REG 0x03
#define AS_CURRENT_ASSIST_LIGHT_SHIFT 0
#define AS_CURRENT_LED_DET_ON (1 << 3)
#define AS_CURRENT_FLASH_CURRENT_SHIFT 4
/* Read / Write (Control register): Reset state: 1011 0100 */
#define AS_CONTROL_REG 0x04
#define AS_CONTROL_MODE_SETTING_SHIFT 0
#define AS_CONTROL_STROBE_ON (1 << 2)
#define AS_CONTROL_OUT_ON (1 << 3)
#define AS_CONTROL_EXT_TORCH_ON (1 << 4)
#define AS_CONTROL_STROBE_TYPE_EDGE (0 << 5)
#define AS_CONTROL_STROBE_TYPE_LEVEL (1 << 5)
#define AS_CONTROL_COIL_PEAK_SHIFT 6
/* Read only (D3 is read / write) (Fault and info): Reset state: 0000 x000 */
#define AS_FAULT_INFO_REG 0x05
#define AS_FAULT_INFO_INDUCTOR_PEAK_LIMIT (1 << 1)
#define AS_FAULT_INFO_INDICATOR_LED (1 << 2)
#define AS_FAULT_INFO_LED_AMOUNT (1 << 3)
#define AS_FAULT_INFO_TIMEOUT (1 << 4)
#define AS_FAULT_INFO_OVER_TEMPERATURE (1 << 5)
#define AS_FAULT_INFO_SHORT_CIRCUIT (1 << 6)
#define AS_FAULT_INFO_OVER_VOLTAGE (1 << 7)
/* Boost register */
#define AS_BOOST_REG 0x0d
#define AS_BOOST_CURRENT_DISABLE (0 << 0)
#define AS_BOOST_CURRENT_ENABLE (1 << 0)
/* Password register is used to unlock boost register writing */
#define AS_PASSWORD_REG 0x0f
#define AS_PASSWORD_UNLOCK_VALUE 0x55
#define AS_NAME "as3645a"
#define AS_I2C_ADDR (0x60 >> 1) /* W:0x60, R:0x61 */
#define AS_FLASH_TIMEOUT_MIN 100000 /* us */
#define AS_FLASH_TIMEOUT_MAX 850000
#define AS_FLASH_TIMEOUT_STEP 50000
#define AS_FLASH_INTENSITY_MIN 200000 /* uA */
#define AS_FLASH_INTENSITY_MAX_1LED 500000
#define AS_FLASH_INTENSITY_MAX_2LEDS 400000
#define AS_FLASH_INTENSITY_STEP 20000
#define AS_TORCH_INTENSITY_MIN 20000 /* uA */
#define AS_TORCH_INTENSITY_MAX 160000
#define AS_TORCH_INTENSITY_STEP 20000
#define AS_INDICATOR_INTENSITY_MIN 0 /* uA */
#define AS_INDICATOR_INTENSITY_MAX 10000
#define AS_INDICATOR_INTENSITY_STEP 2500
#define AS_PEAK_mA_MAX 2000
#define AS_PEAK_mA_TO_REG(a) \
((min_t(u32, AS_PEAK_mA_MAX, a) - 1250) / 250)
/* LED numbers for Devicetree */
#define AS_LED_FLASH 0
#define AS_LED_INDICATOR 1
enum as_mode {
AS_MODE_EXT_TORCH = 0 << AS_CONTROL_MODE_SETTING_SHIFT,
AS_MODE_INDICATOR = 1 << AS_CONTROL_MODE_SETTING_SHIFT,
AS_MODE_ASSIST = 2 << AS_CONTROL_MODE_SETTING_SHIFT,
AS_MODE_FLASH = 3 << AS_CONTROL_MODE_SETTING_SHIFT,
};
struct as3645a_config {
u32 flash_timeout_us;
u32 flash_max_ua;
u32 assist_max_ua;
u32 indicator_max_ua;
u32 voltage_reference;
u32 peak;
};
struct as3645a {
struct i2c_client *client;
struct mutex mutex;
struct led_classdev_flash fled;
struct led_classdev iled_cdev;
struct v4l2_flash *vf;
struct v4l2_flash *vfind;
struct fwnode_handle *flash_node;
struct fwnode_handle *indicator_node;
struct as3645a_config cfg;
enum as_mode mode;
unsigned int timeout;
unsigned int flash_current;
unsigned int assist_current;
unsigned int indicator_current;
enum v4l2_flash_strobe_source strobe_source;
};
#define fled_to_as3645a(__fled) container_of(__fled, struct as3645a, fled)
#define iled_cdev_to_as3645a(__iled_cdev) \
container_of(__iled_cdev, struct as3645a, iled_cdev)
/* Return negative errno else zero on success */
static int as3645a_write(struct as3645a *flash, u8 addr, u8 val)
{
struct i2c_client *client = flash->client;
int rval;
rval = i2c_smbus_write_byte_data(client, addr, val);
dev_dbg(&client->dev, "Write Addr:%02X Val:%02X %s\n", addr, val,
rval < 0 ? "fail" : "ok");
return rval;
}
/* Return negative errno else a data byte received from the device. */
static int as3645a_read(struct as3645a *flash, u8 addr)
{
struct i2c_client *client = flash->client;
int rval;
rval = i2c_smbus_read_byte_data(client, addr);
dev_dbg(&client->dev, "Read Addr:%02X Val:%02X %s\n", addr, rval,
rval < 0 ? "fail" : "ok");
return rval;
}
/* -----------------------------------------------------------------------------
* Hardware configuration and trigger
*/
/**
* as3645a_set_current - Set flash configuration registers
* @flash: The flash
*
* Configure the hardware with flash, assist and indicator currents, as well as
* flash timeout.
*
* Return 0 on success, or a negative error code if an I2C communication error
* occurred.
*/
static int as3645a_set_current(struct as3645a *flash)
{
u8 val;
val = (flash->flash_current << AS_CURRENT_FLASH_CURRENT_SHIFT)
| (flash->assist_current << AS_CURRENT_ASSIST_LIGHT_SHIFT)
| AS_CURRENT_LED_DET_ON;
return as3645a_write(flash, AS_CURRENT_SET_REG, val);
}
static int as3645a_set_timeout(struct as3645a *flash)
{
u8 val;
val = flash->timeout << AS_INDICATOR_AND_TIMER_TIMEOUT_SHIFT;
val |= (flash->cfg.voltage_reference
<< AS_INDICATOR_AND_TIMER_VREF_SHIFT)
| ((flash->indicator_current ? flash->indicator_current - 1 : 0)
<< AS_INDICATOR_AND_TIMER_INDICATOR_SHIFT);
return as3645a_write(flash, AS_INDICATOR_AND_TIMER_REG, val);
}
/**
* as3645a_set_control - Set flash control register
* @flash: The flash
* @mode: Desired output mode
* @on: Desired output state
*
* Configure the hardware with output mode and state.
*
* Return 0 on success, or a negative error code if an I2C communication error
* occurred.
*/
static int
as3645a_set_control(struct as3645a *flash, enum as_mode mode, bool on)
{
u8 reg;
/* Configure output parameters and operation mode. */
reg = (flash->cfg.peak << AS_CONTROL_COIL_PEAK_SHIFT)
| (on ? AS_CONTROL_OUT_ON : 0)
| mode;
if (mode == AS_MODE_FLASH &&
flash->strobe_source == V4L2_FLASH_STROBE_SOURCE_EXTERNAL)
reg |= AS_CONTROL_STROBE_TYPE_LEVEL
| AS_CONTROL_STROBE_ON;
return as3645a_write(flash, AS_CONTROL_REG, reg);
}
static int as3645a_get_fault(struct led_classdev_flash *fled, u32 *fault)
{
struct as3645a *flash = fled_to_as3645a(fled);
int rval;
/* NOTE: reading register clears fault status */
rval = as3645a_read(flash, AS_FAULT_INFO_REG);
if (rval < 0)
return rval;
if (rval & AS_FAULT_INFO_INDUCTOR_PEAK_LIMIT)
*fault |= LED_FAULT_OVER_CURRENT;
if (rval & AS_FAULT_INFO_INDICATOR_LED)
*fault |= LED_FAULT_INDICATOR;
dev_dbg(&flash->client->dev, "%u connected LEDs\n",
rval & AS_FAULT_INFO_LED_AMOUNT ? 2 : 1);
if (rval & AS_FAULT_INFO_TIMEOUT)
*fault |= LED_FAULT_TIMEOUT;
if (rval & AS_FAULT_INFO_OVER_TEMPERATURE)
*fault |= LED_FAULT_OVER_TEMPERATURE;
if (rval & AS_FAULT_INFO_SHORT_CIRCUIT)
*fault |= LED_FAULT_OVER_CURRENT;
if (rval & AS_FAULT_INFO_OVER_VOLTAGE)
*fault |= LED_FAULT_INPUT_VOLTAGE;
return rval;
}
static unsigned int __as3645a_current_to_reg(unsigned int min, unsigned int max,
unsigned int step,
unsigned int val)
{
if (val < min)
val = min;
if (val > max)
val = max;
return (val - min) / step;
}
static unsigned int as3645a_current_to_reg(struct as3645a *flash, bool is_flash,
unsigned int ua)
{
if (is_flash)
return __as3645a_current_to_reg(AS_TORCH_INTENSITY_MIN,
flash->cfg.assist_max_ua,
AS_TORCH_INTENSITY_STEP, ua);
else
return __as3645a_current_to_reg(AS_FLASH_INTENSITY_MIN,
flash->cfg.flash_max_ua,
AS_FLASH_INTENSITY_STEP, ua);
}
static int as3645a_set_indicator_brightness(struct led_classdev *iled_cdev,
enum led_brightness brightness)
{
struct as3645a *flash = iled_cdev_to_as3645a(iled_cdev);
int rval;
flash->indicator_current = brightness;
rval = as3645a_set_timeout(flash);
if (rval)
return rval;
return as3645a_set_control(flash, AS_MODE_INDICATOR, brightness);
}
static int as3645a_set_assist_brightness(struct led_classdev *fled_cdev,
enum led_brightness brightness)
{
struct led_classdev_flash *fled = lcdev_to_flcdev(fled_cdev);
struct as3645a *flash = fled_to_as3645a(fled);
int rval;
if (brightness) {
/* Register value 0 is 20 mA. */
flash->assist_current = brightness - 1;
rval = as3645a_set_current(flash);
if (rval)
return rval;
}
return as3645a_set_control(flash, AS_MODE_ASSIST, brightness);
}
static int as3645a_set_flash_brightness(struct led_classdev_flash *fled,
u32 brightness_ua)
{
struct as3645a *flash = fled_to_as3645a(fled);
flash->flash_current = as3645a_current_to_reg(flash, true,
brightness_ua);
return as3645a_set_current(flash);
}
static int as3645a_set_flash_timeout(struct led_classdev_flash *fled,
u32 timeout_us)
{
struct as3645a *flash = fled_to_as3645a(fled);
flash->timeout = AS_TIMER_US_TO_CODE(timeout_us);
return as3645a_set_timeout(flash);
}
static int as3645a_set_strobe(struct led_classdev_flash *fled, bool state)
{
struct as3645a *flash = fled_to_as3645a(fled);
return as3645a_set_control(flash, AS_MODE_FLASH, state);
}
static const struct led_flash_ops as3645a_led_flash_ops = {
.flash_brightness_set = as3645a_set_flash_brightness,
.timeout_set = as3645a_set_flash_timeout,
.strobe_set = as3645a_set_strobe,
.fault_get = as3645a_get_fault,
};
static int as3645a_setup(struct as3645a *flash)
{
struct device *dev = &flash->client->dev;
u32 fault = 0;
int rval;
/* clear errors */
rval = as3645a_read(flash, AS_FAULT_INFO_REG);
if (rval < 0)
return rval;
dev_dbg(dev, "Fault info: %02x\n", rval);
rval = as3645a_set_current(flash);
if (rval < 0)
return rval;
rval = as3645a_set_timeout(flash);
if (rval < 0)
return rval;
rval = as3645a_set_control(flash, AS_MODE_INDICATOR, false);
if (rval < 0)
return rval;
/* read status */
rval = as3645a_get_fault(&flash->fled, &fault);
if (rval < 0)
return rval;
dev_dbg(dev, "AS_INDICATOR_AND_TIMER_REG: %02x\n",
as3645a_read(flash, AS_INDICATOR_AND_TIMER_REG));
dev_dbg(dev, "AS_CURRENT_SET_REG: %02x\n",
as3645a_read(flash, AS_CURRENT_SET_REG));
dev_dbg(dev, "AS_CONTROL_REG: %02x\n",
as3645a_read(flash, AS_CONTROL_REG));
return rval & ~AS_FAULT_INFO_LED_AMOUNT ? -EIO : 0;
}
static int as3645a_detect(struct as3645a *flash)
{
struct device *dev = &flash->client->dev;
int rval, man, model, rfu, version;
const char *vendor;
rval = as3645a_read(flash, AS_DESIGN_INFO_REG);
if (rval < 0) {
dev_err(dev, "can't read design info reg\n");
return rval;
}
man = AS_DESIGN_INFO_FACTORY(rval);
model = AS_DESIGN_INFO_MODEL(rval);
rval = as3645a_read(flash, AS_VERSION_CONTROL_REG);
if (rval < 0) {
dev_err(dev, "can't read version control reg\n");
return rval;
}
rfu = AS_VERSION_CONTROL_RFU(rval);
version = AS_VERSION_CONTROL_VERSION(rval);
/* Verify the chip model and version. */
if (model != 0x01 || rfu != 0x00) {
dev_err(dev, "AS3645A not detected (model %d rfu %d)\n",
model, rfu);
return -ENODEV;
}
switch (man) {
case 1:
vendor = "AMS, Austria Micro Systems";
break;
case 2:
vendor = "ADI, Analog Devices Inc.";
break;
case 3:
vendor = "NSC, National Semiconductor";
break;
case 4:
vendor = "NXP";
break;
case 5:
vendor = "TI, Texas Instrument";
break;
default:
vendor = "Unknown";
}
dev_info(dev, "Chip vendor: %s (%d) Version: %d\n", vendor,
man, version);
rval = as3645a_write(flash, AS_PASSWORD_REG, AS_PASSWORD_UNLOCK_VALUE);
if (rval < 0)
return rval;
return as3645a_write(flash, AS_BOOST_REG, AS_BOOST_CURRENT_DISABLE);
}
static int as3645a_parse_node(struct as3645a *flash,
struct fwnode_handle *fwnode)
{
struct as3645a_config *cfg = &flash->cfg;
struct fwnode_handle *child;
int rval;
fwnode_for_each_child_node(fwnode, child) {
u32 id = 0;
fwnode_property_read_u32(child, "reg", &id);
switch (id) {
case AS_LED_FLASH:
flash->flash_node = child;
fwnode_handle_get(child);
break;
case AS_LED_INDICATOR:
flash->indicator_node = child;
fwnode_handle_get(child);
break;
default:
dev_warn(&flash->client->dev,
"unknown LED %u encountered, ignoring\n", id);
break;
}
}
if (!flash->flash_node) {
dev_err(&flash->client->dev, "can't find flash node\n");
return -ENODEV;
}
rval = fwnode_property_read_u32(flash->flash_node, "flash-timeout-us",
&cfg->flash_timeout_us);
if (rval < 0) {
dev_err(&flash->client->dev,
"can't read flash-timeout-us property for flash\n");
goto out_err;
}
rval = fwnode_property_read_u32(flash->flash_node, "flash-max-microamp",
&cfg->flash_max_ua);
if (rval < 0) {
dev_err(&flash->client->dev,
"can't read flash-max-microamp property for flash\n");
goto out_err;
}
rval = fwnode_property_read_u32(flash->flash_node, "led-max-microamp",
&cfg->assist_max_ua);
if (rval < 0) {
dev_err(&flash->client->dev,
"can't read led-max-microamp property for flash\n");
goto out_err;
}
fwnode_property_read_u32(flash->flash_node, "voltage-reference",
&cfg->voltage_reference);
fwnode_property_read_u32(flash->flash_node, "ams,input-max-microamp",
&cfg->peak);
cfg->peak = AS_PEAK_mA_TO_REG(cfg->peak);
if (!flash->indicator_node) {
dev_warn(&flash->client->dev,
"can't find indicator node\n");
rval = -ENODEV;
goto out_err;
}
rval = fwnode_property_read_u32(flash->indicator_node,
"led-max-microamp",
&cfg->indicator_max_ua);
if (rval < 0) {
dev_err(&flash->client->dev,
"can't read led-max-microamp property for indicator\n");
goto out_err;
}
return 0;
out_err:
fwnode_handle_put(flash->flash_node);
fwnode_handle_put(flash->indicator_node);
return rval;
}
static int as3645a_led_class_setup(struct as3645a *flash)
{
struct led_classdev *fled_cdev = &flash->fled.led_cdev;
struct led_classdev *iled_cdev = &flash->iled_cdev;
struct led_init_data init_data = {};
struct led_flash_setting *cfg;
int rval;
iled_cdev->brightness_set_blocking = as3645a_set_indicator_brightness;
iled_cdev->max_brightness =
flash->cfg.indicator_max_ua / AS_INDICATOR_INTENSITY_STEP;
iled_cdev->flags = LED_CORE_SUSPENDRESUME;
init_data.fwnode = flash->indicator_node;
init_data.devicename = AS_NAME;
init_data.default_label = "indicator";
rval = led_classdev_register_ext(&flash->client->dev, iled_cdev,
&init_data);
if (rval < 0)
return rval;
cfg = &flash->fled.brightness;
cfg->min = AS_FLASH_INTENSITY_MIN;
cfg->max = flash->cfg.flash_max_ua;
cfg->step = AS_FLASH_INTENSITY_STEP;
cfg->val = flash->cfg.flash_max_ua;
cfg = &flash->fled.timeout;
cfg->min = AS_FLASH_TIMEOUT_MIN;
cfg->max = flash->cfg.flash_timeout_us;
cfg->step = AS_FLASH_TIMEOUT_STEP;
cfg->val = flash->cfg.flash_timeout_us;
flash->fled.ops = &as3645a_led_flash_ops;
fled_cdev->brightness_set_blocking = as3645a_set_assist_brightness;
/* Value 0 is off in LED class. */
fled_cdev->max_brightness =
as3645a_current_to_reg(flash, false,
flash->cfg.assist_max_ua) + 1;
fled_cdev->flags = LED_DEV_CAP_FLASH | LED_CORE_SUSPENDRESUME;
init_data.fwnode = flash->flash_node;
init_data.devicename = AS_NAME;
init_data.default_label = "flash";
rval = led_classdev_flash_register_ext(&flash->client->dev,
&flash->fled, &init_data);
if (rval)
goto out_err;
return rval;
out_err:
led_classdev_unregister(iled_cdev);
dev_err(&flash->client->dev,
"led_classdev_flash_register() failed, error %d\n",
rval);
return rval;
}
static int as3645a_v4l2_setup(struct as3645a *flash)
{
struct led_classdev_flash *fled = &flash->fled;
struct led_classdev *led = &fled->led_cdev;
struct v4l2_flash_config cfg = {
.intensity = {
.min = AS_TORCH_INTENSITY_MIN,
.max = flash->cfg.assist_max_ua,
.step = AS_TORCH_INTENSITY_STEP,
.val = flash->cfg.assist_max_ua,
},
};
struct v4l2_flash_config cfgind = {
.intensity = {
.min = AS_INDICATOR_INTENSITY_MIN,
.max = flash->cfg.indicator_max_ua,
.step = AS_INDICATOR_INTENSITY_STEP,
.val = flash->cfg.indicator_max_ua,
},
};
strscpy(cfg.dev_name, led->dev->kobj.name, sizeof(cfg.dev_name));
strscpy(cfgind.dev_name, flash->iled_cdev.dev->kobj.name,
sizeof(cfgind.dev_name));
flash->vf = v4l2_flash_init(
&flash->client->dev, flash->flash_node, &flash->fled, NULL,
&cfg);
if (IS_ERR(flash->vf))
return PTR_ERR(flash->vf);
flash->vfind = v4l2_flash_indicator_init(
&flash->client->dev, flash->indicator_node, &flash->iled_cdev,
&cfgind);
if (IS_ERR(flash->vfind)) {
v4l2_flash_release(flash->vf);
return PTR_ERR(flash->vfind);
}
return 0;
}
static int as3645a_probe(struct i2c_client *client)
{
struct as3645a *flash;
int rval;
if (!dev_fwnode(&client->dev))
return -ENODEV;
flash = devm_kzalloc(&client->dev, sizeof(*flash), GFP_KERNEL);
if (flash == NULL)
return -ENOMEM;
flash->client = client;
rval = as3645a_parse_node(flash, dev_fwnode(&client->dev));
if (rval < 0)
return rval;
rval = as3645a_detect(flash);
if (rval < 0)
goto out_put_nodes;
mutex_init(&flash->mutex);
i2c_set_clientdata(client, flash);
rval = as3645a_setup(flash);
if (rval)
goto out_mutex_destroy;
rval = as3645a_led_class_setup(flash);
if (rval)
goto out_mutex_destroy;
rval = as3645a_v4l2_setup(flash);
if (rval)
goto out_led_classdev_flash_unregister;
return 0;
out_led_classdev_flash_unregister:
led_classdev_flash_unregister(&flash->fled);
out_mutex_destroy:
mutex_destroy(&flash->mutex);
out_put_nodes:
fwnode_handle_put(flash->flash_node);
fwnode_handle_put(flash->indicator_node);
return rval;
}
static void as3645a_remove(struct i2c_client *client)
{
struct as3645a *flash = i2c_get_clientdata(client);
as3645a_set_control(flash, AS_MODE_EXT_TORCH, false);
v4l2_flash_release(flash->vf);
v4l2_flash_release(flash->vfind);
led_classdev_flash_unregister(&flash->fled);
led_classdev_unregister(&flash->iled_cdev);
mutex_destroy(&flash->mutex);
fwnode_handle_put(flash->flash_node);
fwnode_handle_put(flash->indicator_node);
}
static const struct i2c_device_id as3645a_id_table[] = {
{ AS_NAME, 0 },
{ },
};
MODULE_DEVICE_TABLE(i2c, as3645a_id_table);
static const struct of_device_id as3645a_of_table[] = {
{ .compatible = "ams,as3645a" },
{ },
};
MODULE_DEVICE_TABLE(of, as3645a_of_table);
static struct i2c_driver as3645a_i2c_driver = {
.driver = {
.of_match_table = as3645a_of_table,
.name = AS_NAME,
},
.probe = as3645a_probe,
.remove = as3645a_remove,
.id_table = as3645a_id_table,
};
module_i2c_driver(as3645a_i2c_driver);
MODULE_AUTHOR("Laurent Pinchart <[email protected]>");
MODULE_AUTHOR("Sakari Ailus <[email protected]>");
MODULE_DESCRIPTION("LED flash driver for AS3645A, LM3555 and their clones");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/flash/leds-as3645a.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* LED driver : leds-ktd2692.c
*
* Copyright (C) 2015 Samsung Electronics
* Ingi Kim <[email protected]>
*/
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/gpio/consumer.h>
#include <linux/led-class-flash.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regulator/consumer.h>
/* Value related the movie mode */
#define KTD2692_MOVIE_MODE_CURRENT_LEVELS 16
#define KTD2692_MM_TO_FL_RATIO(x) ((x) / 3)
#define KTD2692_MM_MIN_CURR_THRESHOLD_SCALE 8
/* Value related the flash mode */
#define KTD2692_FLASH_MODE_TIMEOUT_LEVELS 8
#define KTD2692_FLASH_MODE_TIMEOUT_DISABLE 0
#define KTD2692_FLASH_MODE_CURR_PERCENT(x) (((x) * 16) / 100)
/* Macro for getting offset of flash timeout */
#define GET_TIMEOUT_OFFSET(timeout, step) ((timeout) / (step))
/* Base register address */
#define KTD2692_REG_LVP_BASE 0x00
#define KTD2692_REG_FLASH_TIMEOUT_BASE 0x20
#define KTD2692_REG_MM_MIN_CURR_THRESHOLD_BASE 0x40
#define KTD2692_REG_MOVIE_CURRENT_BASE 0x60
#define KTD2692_REG_FLASH_CURRENT_BASE 0x80
#define KTD2692_REG_MODE_BASE 0xA0
/* Set bit coding time for expresswire interface */
#define KTD2692_TIME_RESET_US 700
#define KTD2692_TIME_DATA_START_TIME_US 10
#define KTD2692_TIME_HIGH_END_OF_DATA_US 350
#define KTD2692_TIME_LOW_END_OF_DATA_US 10
#define KTD2692_TIME_SHORT_BITSET_US 4
#define KTD2692_TIME_LONG_BITSET_US 12
/* KTD2692 default length of name */
#define KTD2692_NAME_LENGTH 20
enum ktd2692_bitset {
KTD2692_LOW = 0,
KTD2692_HIGH,
};
/* Movie / Flash Mode Control */
enum ktd2692_led_mode {
KTD2692_MODE_DISABLE = 0, /* default */
KTD2692_MODE_MOVIE,
KTD2692_MODE_FLASH,
};
struct ktd2692_led_config_data {
/* maximum LED current in movie mode */
u32 movie_max_microamp;
/* maximum LED current in flash mode */
u32 flash_max_microamp;
/* maximum flash timeout */
u32 flash_max_timeout;
/* max LED brightness level */
enum led_brightness max_brightness;
};
struct ktd2692_context {
/* Related LED Flash class device */
struct led_classdev_flash fled_cdev;
/* secures access to the device */
struct mutex lock;
struct regulator *regulator;
struct gpio_desc *aux_gpio;
struct gpio_desc *ctrl_gpio;
enum ktd2692_led_mode mode;
enum led_brightness torch_brightness;
};
static struct ktd2692_context *fled_cdev_to_led(
struct led_classdev_flash *fled_cdev)
{
return container_of(fled_cdev, struct ktd2692_context, fled_cdev);
}
static void ktd2692_expresswire_start(struct ktd2692_context *led)
{
gpiod_direction_output(led->ctrl_gpio, KTD2692_HIGH);
udelay(KTD2692_TIME_DATA_START_TIME_US);
}
static void ktd2692_expresswire_reset(struct ktd2692_context *led)
{
gpiod_direction_output(led->ctrl_gpio, KTD2692_LOW);
udelay(KTD2692_TIME_RESET_US);
}
static void ktd2692_expresswire_end(struct ktd2692_context *led)
{
gpiod_direction_output(led->ctrl_gpio, KTD2692_LOW);
udelay(KTD2692_TIME_LOW_END_OF_DATA_US);
gpiod_direction_output(led->ctrl_gpio, KTD2692_HIGH);
udelay(KTD2692_TIME_HIGH_END_OF_DATA_US);
}
static void ktd2692_expresswire_set_bit(struct ktd2692_context *led, bool bit)
{
/*
* The Low Bit(0) and High Bit(1) is based on a time detection
* algorithm between time low and time high
* Time_(L_LB) : Low time of the Low Bit(0)
* Time_(H_LB) : High time of the LOW Bit(0)
* Time_(L_HB) : Low time of the High Bit(1)
* Time_(H_HB) : High time of the High Bit(1)
*
* It can be simplified to:
* Low Bit(0) : 2 * Time_(H_LB) < Time_(L_LB)
* High Bit(1) : 2 * Time_(L_HB) < Time_(H_HB)
* HIGH ___ ____ _.. _________ ___
* |_________| |_.. |____| |__|
* LOW <L_LB> <H_LB> <L_HB> <H_HB>
* [ Low Bit (0) ] [ High Bit(1) ]
*/
if (bit) {
gpiod_direction_output(led->ctrl_gpio, KTD2692_LOW);
udelay(KTD2692_TIME_SHORT_BITSET_US);
gpiod_direction_output(led->ctrl_gpio, KTD2692_HIGH);
udelay(KTD2692_TIME_LONG_BITSET_US);
} else {
gpiod_direction_output(led->ctrl_gpio, KTD2692_LOW);
udelay(KTD2692_TIME_LONG_BITSET_US);
gpiod_direction_output(led->ctrl_gpio, KTD2692_HIGH);
udelay(KTD2692_TIME_SHORT_BITSET_US);
}
}
static void ktd2692_expresswire_write(struct ktd2692_context *led, u8 value)
{
int i;
ktd2692_expresswire_start(led);
for (i = 7; i >= 0; i--)
ktd2692_expresswire_set_bit(led, value & BIT(i));
ktd2692_expresswire_end(led);
}
static int ktd2692_led_brightness_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
struct ktd2692_context *led = fled_cdev_to_led(fled_cdev);
mutex_lock(&led->lock);
if (brightness == LED_OFF) {
led->mode = KTD2692_MODE_DISABLE;
gpiod_direction_output(led->aux_gpio, KTD2692_LOW);
} else {
ktd2692_expresswire_write(led, brightness |
KTD2692_REG_MOVIE_CURRENT_BASE);
led->mode = KTD2692_MODE_MOVIE;
}
ktd2692_expresswire_write(led, led->mode | KTD2692_REG_MODE_BASE);
mutex_unlock(&led->lock);
return 0;
}
static int ktd2692_led_flash_strobe_set(struct led_classdev_flash *fled_cdev,
bool state)
{
struct ktd2692_context *led = fled_cdev_to_led(fled_cdev);
struct led_flash_setting *timeout = &fled_cdev->timeout;
u32 flash_tm_reg;
mutex_lock(&led->lock);
if (state) {
flash_tm_reg = GET_TIMEOUT_OFFSET(timeout->val, timeout->step);
ktd2692_expresswire_write(led, flash_tm_reg
| KTD2692_REG_FLASH_TIMEOUT_BASE);
led->mode = KTD2692_MODE_FLASH;
gpiod_direction_output(led->aux_gpio, KTD2692_HIGH);
} else {
led->mode = KTD2692_MODE_DISABLE;
gpiod_direction_output(led->aux_gpio, KTD2692_LOW);
}
ktd2692_expresswire_write(led, led->mode | KTD2692_REG_MODE_BASE);
fled_cdev->led_cdev.brightness = LED_OFF;
led->mode = KTD2692_MODE_DISABLE;
mutex_unlock(&led->lock);
return 0;
}
static int ktd2692_led_flash_timeout_set(struct led_classdev_flash *fled_cdev,
u32 timeout)
{
return 0;
}
static void ktd2692_init_movie_current_max(struct ktd2692_led_config_data *cfg)
{
u32 offset, step;
u32 movie_current_microamp;
offset = KTD2692_MOVIE_MODE_CURRENT_LEVELS;
step = KTD2692_MM_TO_FL_RATIO(cfg->flash_max_microamp)
/ KTD2692_MOVIE_MODE_CURRENT_LEVELS;
do {
movie_current_microamp = step * offset;
offset--;
} while ((movie_current_microamp > cfg->movie_max_microamp) &&
(offset > 0));
cfg->max_brightness = offset;
}
static void ktd2692_init_flash_timeout(struct led_classdev_flash *fled_cdev,
struct ktd2692_led_config_data *cfg)
{
struct led_flash_setting *setting;
setting = &fled_cdev->timeout;
setting->min = KTD2692_FLASH_MODE_TIMEOUT_DISABLE;
setting->max = cfg->flash_max_timeout;
setting->step = cfg->flash_max_timeout
/ (KTD2692_FLASH_MODE_TIMEOUT_LEVELS - 1);
setting->val = cfg->flash_max_timeout;
}
static void ktd2692_setup(struct ktd2692_context *led)
{
led->mode = KTD2692_MODE_DISABLE;
ktd2692_expresswire_reset(led);
gpiod_direction_output(led->aux_gpio, KTD2692_LOW);
ktd2692_expresswire_write(led, (KTD2692_MM_MIN_CURR_THRESHOLD_SCALE - 1)
| KTD2692_REG_MM_MIN_CURR_THRESHOLD_BASE);
ktd2692_expresswire_write(led, KTD2692_FLASH_MODE_CURR_PERCENT(45)
| KTD2692_REG_FLASH_CURRENT_BASE);
}
static void regulator_disable_action(void *_data)
{
struct device *dev = _data;
struct ktd2692_context *led = dev_get_drvdata(dev);
int ret;
ret = regulator_disable(led->regulator);
if (ret)
dev_err(dev, "Failed to disable supply: %d\n", ret);
}
static int ktd2692_parse_dt(struct ktd2692_context *led, struct device *dev,
struct ktd2692_led_config_data *cfg)
{
struct device_node *np = dev_of_node(dev);
struct device_node *child_node;
int ret;
if (!np)
return -ENXIO;
led->ctrl_gpio = devm_gpiod_get(dev, "ctrl", GPIOD_ASIS);
ret = PTR_ERR_OR_ZERO(led->ctrl_gpio);
if (ret)
return dev_err_probe(dev, ret, "cannot get ctrl-gpios\n");
led->aux_gpio = devm_gpiod_get_optional(dev, "aux", GPIOD_ASIS);
if (IS_ERR(led->aux_gpio))
return dev_err_probe(dev, PTR_ERR(led->aux_gpio), "cannot get aux-gpios\n");
led->regulator = devm_regulator_get(dev, "vin");
if (IS_ERR(led->regulator))
led->regulator = NULL;
if (led->regulator) {
ret = regulator_enable(led->regulator);
if (ret) {
dev_err(dev, "Failed to enable supply: %d\n", ret);
} else {
ret = devm_add_action_or_reset(dev,
regulator_disable_action, dev);
if (ret)
return ret;
}
}
child_node = of_get_next_available_child(np, NULL);
if (!child_node) {
dev_err(dev, "No DT child node found for connected LED.\n");
return -EINVAL;
}
led->fled_cdev.led_cdev.name =
of_get_property(child_node, "label", NULL) ? : child_node->name;
ret = of_property_read_u32(child_node, "led-max-microamp",
&cfg->movie_max_microamp);
if (ret) {
dev_err(dev, "failed to parse led-max-microamp\n");
goto err_parse_dt;
}
ret = of_property_read_u32(child_node, "flash-max-microamp",
&cfg->flash_max_microamp);
if (ret) {
dev_err(dev, "failed to parse flash-max-microamp\n");
goto err_parse_dt;
}
ret = of_property_read_u32(child_node, "flash-max-timeout-us",
&cfg->flash_max_timeout);
if (ret) {
dev_err(dev, "failed to parse flash-max-timeout-us\n");
goto err_parse_dt;
}
err_parse_dt:
of_node_put(child_node);
return ret;
}
static const struct led_flash_ops flash_ops = {
.strobe_set = ktd2692_led_flash_strobe_set,
.timeout_set = ktd2692_led_flash_timeout_set,
};
static int ktd2692_probe(struct platform_device *pdev)
{
struct ktd2692_context *led;
struct led_classdev *led_cdev;
struct led_classdev_flash *fled_cdev;
struct ktd2692_led_config_data led_cfg;
int ret;
led = devm_kzalloc(&pdev->dev, sizeof(*led), GFP_KERNEL);
if (!led)
return -ENOMEM;
fled_cdev = &led->fled_cdev;
led_cdev = &fled_cdev->led_cdev;
ret = ktd2692_parse_dt(led, &pdev->dev, &led_cfg);
if (ret)
return ret;
ktd2692_init_flash_timeout(fled_cdev, &led_cfg);
ktd2692_init_movie_current_max(&led_cfg);
fled_cdev->ops = &flash_ops;
led_cdev->max_brightness = led_cfg.max_brightness;
led_cdev->brightness_set_blocking = ktd2692_led_brightness_set;
led_cdev->flags |= LED_CORE_SUSPENDRESUME | LED_DEV_CAP_FLASH;
mutex_init(&led->lock);
platform_set_drvdata(pdev, led);
ret = led_classdev_flash_register(&pdev->dev, fled_cdev);
if (ret) {
dev_err(&pdev->dev, "can't register LED %s\n", led_cdev->name);
mutex_destroy(&led->lock);
return ret;
}
ktd2692_setup(led);
return 0;
}
static int ktd2692_remove(struct platform_device *pdev)
{
struct ktd2692_context *led = platform_get_drvdata(pdev);
led_classdev_flash_unregister(&led->fled_cdev);
mutex_destroy(&led->lock);
return 0;
}
static const struct of_device_id ktd2692_match[] = {
{ .compatible = "kinetic,ktd2692", },
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, ktd2692_match);
static struct platform_driver ktd2692_driver = {
.driver = {
.name = "ktd2692",
.of_match_table = ktd2692_match,
},
.probe = ktd2692_probe,
.remove = ktd2692_remove,
};
module_platform_driver(ktd2692_driver);
MODULE_AUTHOR("Ingi Kim <[email protected]>");
MODULE_DESCRIPTION("Kinetic KTD2692 LED driver");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/flash/leds-ktd2692.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* LED Flash class driver for the AAT1290
* 1.5A Step-Up Current Regulator for Flash LEDs
*
* Copyright (C) 2015, Samsung Electronics Co., Ltd.
* Author: Jacek Anaszewski <[email protected]>
*/
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/led-class-flash.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/pinctrl/consumer.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <media/v4l2-flash-led-class.h>
#define AAT1290_MOVIE_MODE_CURRENT_ADDR 17
#define AAT1290_MAX_MM_CURR_PERCENT_0 16
#define AAT1290_MAX_MM_CURR_PERCENT_100 1
#define AAT1290_FLASH_SAFETY_TIMER_ADDR 18
#define AAT1290_MOVIE_MODE_CONFIG_ADDR 19
#define AAT1290_MOVIE_MODE_OFF 1
#define AAT1290_MOVIE_MODE_ON 3
#define AAT1290_MM_CURRENT_RATIO_ADDR 20
#define AAT1290_MM_TO_FL_1_92 1
#define AAT1290_MM_TO_FL_RATIO 1000 / 1920
#define AAT1290_MAX_MM_CURRENT(fl_max) (fl_max * AAT1290_MM_TO_FL_RATIO)
#define AAT1290_LATCH_TIME_MIN_US 500
#define AAT1290_LATCH_TIME_MAX_US 1000
#define AAT1290_EN_SET_TICK_TIME_US 1
#define AAT1290_FLEN_OFF_DELAY_TIME_US 10
#define AAT1290_FLASH_TM_NUM_LEVELS 16
#define AAT1290_MM_CURRENT_SCALE_SIZE 15
#define AAT1290_NAME "aat1290"
struct aat1290_led_config_data {
/* maximum LED current in movie mode */
u32 max_mm_current;
/* maximum LED current in flash mode */
u32 max_flash_current;
/* maximum flash timeout */
u32 max_flash_tm;
/* external strobe capability */
bool has_external_strobe;
/* max LED brightness level */
enum led_brightness max_brightness;
};
struct aat1290_led {
/* platform device data */
struct platform_device *pdev;
/* secures access to the device */
struct mutex lock;
/* corresponding LED Flash class device */
struct led_classdev_flash fled_cdev;
/* V4L2 Flash device */
struct v4l2_flash *v4l2_flash;
/* FLEN pin */
struct gpio_desc *gpio_fl_en;
/* EN|SET pin */
struct gpio_desc *gpio_en_set;
/* movie mode current scale */
int *mm_current_scale;
/* device mode */
bool movie_mode;
/* brightness cache */
unsigned int torch_brightness;
};
static struct aat1290_led *fled_cdev_to_led(
struct led_classdev_flash *fled_cdev)
{
return container_of(fled_cdev, struct aat1290_led, fled_cdev);
}
static struct led_classdev_flash *led_cdev_to_fled_cdev(
struct led_classdev *led_cdev)
{
return container_of(led_cdev, struct led_classdev_flash, led_cdev);
}
static void aat1290_as2cwire_write(struct aat1290_led *led, int addr, int value)
{
int i;
gpiod_direction_output(led->gpio_fl_en, 0);
gpiod_direction_output(led->gpio_en_set, 0);
udelay(AAT1290_FLEN_OFF_DELAY_TIME_US);
/* write address */
for (i = 0; i < addr; ++i) {
udelay(AAT1290_EN_SET_TICK_TIME_US);
gpiod_direction_output(led->gpio_en_set, 0);
udelay(AAT1290_EN_SET_TICK_TIME_US);
gpiod_direction_output(led->gpio_en_set, 1);
}
usleep_range(AAT1290_LATCH_TIME_MIN_US, AAT1290_LATCH_TIME_MAX_US);
/* write data */
for (i = 0; i < value; ++i) {
udelay(AAT1290_EN_SET_TICK_TIME_US);
gpiod_direction_output(led->gpio_en_set, 0);
udelay(AAT1290_EN_SET_TICK_TIME_US);
gpiod_direction_output(led->gpio_en_set, 1);
}
usleep_range(AAT1290_LATCH_TIME_MIN_US, AAT1290_LATCH_TIME_MAX_US);
}
static void aat1290_set_flash_safety_timer(struct aat1290_led *led,
unsigned int micro_sec)
{
struct led_classdev_flash *fled_cdev = &led->fled_cdev;
struct led_flash_setting *flash_tm = &fled_cdev->timeout;
int flash_tm_reg = AAT1290_FLASH_TM_NUM_LEVELS -
(micro_sec / flash_tm->step) + 1;
aat1290_as2cwire_write(led, AAT1290_FLASH_SAFETY_TIMER_ADDR,
flash_tm_reg);
}
/* LED subsystem callbacks */
static int aat1290_led_brightness_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
struct led_classdev_flash *fled_cdev = led_cdev_to_fled_cdev(led_cdev);
struct aat1290_led *led = fled_cdev_to_led(fled_cdev);
mutex_lock(&led->lock);
if (brightness == 0) {
gpiod_direction_output(led->gpio_fl_en, 0);
gpiod_direction_output(led->gpio_en_set, 0);
led->movie_mode = false;
} else {
if (!led->movie_mode) {
aat1290_as2cwire_write(led,
AAT1290_MM_CURRENT_RATIO_ADDR,
AAT1290_MM_TO_FL_1_92);
led->movie_mode = true;
}
aat1290_as2cwire_write(led, AAT1290_MOVIE_MODE_CURRENT_ADDR,
AAT1290_MAX_MM_CURR_PERCENT_0 - brightness);
aat1290_as2cwire_write(led, AAT1290_MOVIE_MODE_CONFIG_ADDR,
AAT1290_MOVIE_MODE_ON);
}
mutex_unlock(&led->lock);
return 0;
}
static int aat1290_led_flash_strobe_set(struct led_classdev_flash *fled_cdev,
bool state)
{
struct aat1290_led *led = fled_cdev_to_led(fled_cdev);
struct led_classdev *led_cdev = &fled_cdev->led_cdev;
struct led_flash_setting *timeout = &fled_cdev->timeout;
mutex_lock(&led->lock);
if (state) {
aat1290_set_flash_safety_timer(led, timeout->val);
gpiod_direction_output(led->gpio_fl_en, 1);
} else {
gpiod_direction_output(led->gpio_fl_en, 0);
gpiod_direction_output(led->gpio_en_set, 0);
}
/*
* To reenter movie mode after a flash event the part must be cycled
* off and back on to reset the movie mode and reprogrammed via the
* AS2Cwire. Therefore the brightness and movie_mode properties needs
* to be updated here to reflect the actual state.
*/
led_cdev->brightness = 0;
led->movie_mode = false;
mutex_unlock(&led->lock);
return 0;
}
static int aat1290_led_flash_timeout_set(struct led_classdev_flash *fled_cdev,
u32 timeout)
{
/*
* Don't do anything - flash timeout is cached in the led-class-flash
* core and will be applied in the strobe_set op, as writing the
* safety timer register spuriously turns the torch mode on.
*/
return 0;
}
static int aat1290_led_parse_dt(struct aat1290_led *led,
struct aat1290_led_config_data *cfg,
struct device_node **sub_node)
{
struct device *dev = &led->pdev->dev;
struct device_node *child_node;
#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS)
struct pinctrl *pinctrl;
#endif
int ret = 0;
led->gpio_fl_en = devm_gpiod_get(dev, "flen", GPIOD_ASIS);
if (IS_ERR(led->gpio_fl_en)) {
ret = PTR_ERR(led->gpio_fl_en);
dev_err(dev, "Unable to claim gpio \"flen\".\n");
return ret;
}
led->gpio_en_set = devm_gpiod_get(dev, "enset", GPIOD_ASIS);
if (IS_ERR(led->gpio_en_set)) {
ret = PTR_ERR(led->gpio_en_set);
dev_err(dev, "Unable to claim gpio \"enset\".\n");
return ret;
}
#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS)
pinctrl = devm_pinctrl_get_select_default(&led->pdev->dev);
if (IS_ERR(pinctrl)) {
cfg->has_external_strobe = false;
dev_info(dev,
"No support for external strobe detected.\n");
} else {
cfg->has_external_strobe = true;
}
#endif
child_node = of_get_next_available_child(dev_of_node(dev), NULL);
if (!child_node) {
dev_err(dev, "No DT child node found for connected LED.\n");
return -EINVAL;
}
ret = of_property_read_u32(child_node, "led-max-microamp",
&cfg->max_mm_current);
/*
* led-max-microamp will default to 1/20 of flash-max-microamp
* in case it is missing.
*/
if (ret < 0)
dev_warn(dev,
"led-max-microamp DT property missing\n");
ret = of_property_read_u32(child_node, "flash-max-microamp",
&cfg->max_flash_current);
if (ret < 0) {
dev_err(dev,
"flash-max-microamp DT property missing\n");
goto err_parse_dt;
}
ret = of_property_read_u32(child_node, "flash-max-timeout-us",
&cfg->max_flash_tm);
if (ret < 0) {
dev_err(dev,
"flash-max-timeout-us DT property missing\n");
goto err_parse_dt;
}
*sub_node = child_node;
err_parse_dt:
of_node_put(child_node);
return ret;
}
static void aat1290_led_validate_mm_current(struct aat1290_led *led,
struct aat1290_led_config_data *cfg)
{
int i, b = 0, e = AAT1290_MM_CURRENT_SCALE_SIZE;
while (e - b > 1) {
i = b + (e - b) / 2;
if (cfg->max_mm_current < led->mm_current_scale[i])
e = i;
else
b = i;
}
cfg->max_mm_current = led->mm_current_scale[b];
cfg->max_brightness = b + 1;
}
static int init_mm_current_scale(struct aat1290_led *led,
struct aat1290_led_config_data *cfg)
{
static const int max_mm_current_percent[] = {
20, 22, 25, 28, 32, 36, 40, 45, 50, 56,
63, 71, 79, 89, 100
};
int i, max_mm_current =
AAT1290_MAX_MM_CURRENT(cfg->max_flash_current);
led->mm_current_scale = devm_kzalloc(&led->pdev->dev,
sizeof(max_mm_current_percent),
GFP_KERNEL);
if (!led->mm_current_scale)
return -ENOMEM;
for (i = 0; i < AAT1290_MM_CURRENT_SCALE_SIZE; ++i)
led->mm_current_scale[i] = max_mm_current *
max_mm_current_percent[i] / 100;
return 0;
}
static int aat1290_led_get_configuration(struct aat1290_led *led,
struct aat1290_led_config_data *cfg,
struct device_node **sub_node)
{
int ret;
ret = aat1290_led_parse_dt(led, cfg, sub_node);
if (ret < 0)
return ret;
/*
* Init non-linear movie mode current scale basing
* on the max flash current from led configuration.
*/
ret = init_mm_current_scale(led, cfg);
if (ret < 0)
return ret;
aat1290_led_validate_mm_current(led, cfg);
#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS)
#else
devm_kfree(&led->pdev->dev, led->mm_current_scale);
#endif
return 0;
}
static void aat1290_init_flash_timeout(struct aat1290_led *led,
struct aat1290_led_config_data *cfg)
{
struct led_classdev_flash *fled_cdev = &led->fled_cdev;
struct led_flash_setting *setting;
/* Init flash timeout setting */
setting = &fled_cdev->timeout;
setting->min = cfg->max_flash_tm / AAT1290_FLASH_TM_NUM_LEVELS;
setting->max = cfg->max_flash_tm;
setting->step = setting->min;
setting->val = setting->max;
}
#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS)
static enum led_brightness aat1290_intensity_to_brightness(
struct v4l2_flash *v4l2_flash,
s32 intensity)
{
struct led_classdev_flash *fled_cdev = v4l2_flash->fled_cdev;
struct aat1290_led *led = fled_cdev_to_led(fled_cdev);
int i;
for (i = AAT1290_MM_CURRENT_SCALE_SIZE - 1; i >= 0; --i)
if (intensity >= led->mm_current_scale[i])
return i + 1;
return 1;
}
static s32 aat1290_brightness_to_intensity(struct v4l2_flash *v4l2_flash,
enum led_brightness brightness)
{
struct led_classdev_flash *fled_cdev = v4l2_flash->fled_cdev;
struct aat1290_led *led = fled_cdev_to_led(fled_cdev);
return led->mm_current_scale[brightness - 1];
}
static int aat1290_led_external_strobe_set(struct v4l2_flash *v4l2_flash,
bool enable)
{
struct aat1290_led *led = fled_cdev_to_led(v4l2_flash->fled_cdev);
struct led_classdev_flash *fled_cdev = v4l2_flash->fled_cdev;
struct led_classdev *led_cdev = &fled_cdev->led_cdev;
struct pinctrl *pinctrl;
gpiod_direction_output(led->gpio_fl_en, 0);
gpiod_direction_output(led->gpio_en_set, 0);
led->movie_mode = false;
led_cdev->brightness = 0;
pinctrl = devm_pinctrl_get_select(&led->pdev->dev,
enable ? "isp" : "host");
if (IS_ERR(pinctrl)) {
dev_warn(&led->pdev->dev, "Unable to switch strobe source.\n");
return PTR_ERR(pinctrl);
}
return 0;
}
static void aat1290_init_v4l2_flash_config(struct aat1290_led *led,
struct aat1290_led_config_data *led_cfg,
struct v4l2_flash_config *v4l2_sd_cfg)
{
struct led_classdev *led_cdev = &led->fled_cdev.led_cdev;
struct led_flash_setting *s;
strscpy(v4l2_sd_cfg->dev_name, led_cdev->dev->kobj.name,
sizeof(v4l2_sd_cfg->dev_name));
s = &v4l2_sd_cfg->intensity;
s->min = led->mm_current_scale[0];
s->max = led_cfg->max_mm_current;
s->step = 1;
s->val = s->max;
v4l2_sd_cfg->has_external_strobe = led_cfg->has_external_strobe;
}
static const struct v4l2_flash_ops v4l2_flash_ops = {
.external_strobe_set = aat1290_led_external_strobe_set,
.intensity_to_led_brightness = aat1290_intensity_to_brightness,
.led_brightness_to_intensity = aat1290_brightness_to_intensity,
};
#else
static inline void aat1290_init_v4l2_flash_config(struct aat1290_led *led,
struct aat1290_led_config_data *led_cfg,
struct v4l2_flash_config *v4l2_sd_cfg)
{
}
static const struct v4l2_flash_ops v4l2_flash_ops;
#endif
static const struct led_flash_ops flash_ops = {
.strobe_set = aat1290_led_flash_strobe_set,
.timeout_set = aat1290_led_flash_timeout_set,
};
static int aat1290_led_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *sub_node = NULL;
struct aat1290_led *led;
struct led_classdev *led_cdev;
struct led_classdev_flash *fled_cdev;
struct led_init_data init_data = {};
struct aat1290_led_config_data led_cfg = {};
struct v4l2_flash_config v4l2_sd_cfg = {};
int ret;
led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL);
if (!led)
return -ENOMEM;
led->pdev = pdev;
platform_set_drvdata(pdev, led);
fled_cdev = &led->fled_cdev;
fled_cdev->ops = &flash_ops;
led_cdev = &fled_cdev->led_cdev;
ret = aat1290_led_get_configuration(led, &led_cfg, &sub_node);
if (ret < 0)
return ret;
mutex_init(&led->lock);
/* Initialize LED Flash class device */
led_cdev->brightness_set_blocking = aat1290_led_brightness_set;
led_cdev->max_brightness = led_cfg.max_brightness;
led_cdev->flags |= LED_DEV_CAP_FLASH;
aat1290_init_flash_timeout(led, &led_cfg);
init_data.fwnode = of_fwnode_handle(sub_node);
init_data.devicename = AAT1290_NAME;
/* Register LED Flash class device */
ret = led_classdev_flash_register_ext(&pdev->dev, fled_cdev,
&init_data);
if (ret < 0)
goto err_flash_register;
aat1290_init_v4l2_flash_config(led, &led_cfg, &v4l2_sd_cfg);
/* Create V4L2 Flash subdev. */
led->v4l2_flash = v4l2_flash_init(dev, of_fwnode_handle(sub_node),
fled_cdev, &v4l2_flash_ops,
&v4l2_sd_cfg);
if (IS_ERR(led->v4l2_flash)) {
ret = PTR_ERR(led->v4l2_flash);
goto error_v4l2_flash_init;
}
return 0;
error_v4l2_flash_init:
led_classdev_flash_unregister(fled_cdev);
err_flash_register:
mutex_destroy(&led->lock);
return ret;
}
static int aat1290_led_remove(struct platform_device *pdev)
{
struct aat1290_led *led = platform_get_drvdata(pdev);
v4l2_flash_release(led->v4l2_flash);
led_classdev_flash_unregister(&led->fled_cdev);
mutex_destroy(&led->lock);
return 0;
}
static const struct of_device_id aat1290_led_dt_match[] = {
{ .compatible = "skyworks,aat1290" },
{},
};
MODULE_DEVICE_TABLE(of, aat1290_led_dt_match);
static struct platform_driver aat1290_led_driver = {
.probe = aat1290_led_probe,
.remove = aat1290_led_remove,
.driver = {
.name = "aat1290",
.of_match_table = aat1290_led_dt_match,
},
};
module_platform_driver(aat1290_led_driver);
MODULE_AUTHOR("Jacek Anaszewski <[email protected]>");
MODULE_DESCRIPTION("Skyworks Current Regulator for Flash LEDs");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/flash/leds-aat1290.c |
// SPDX-License-Identifier: GPL-2.0
// Flash and torch driver for Texas Instruments LM3601X LED
// Flash driver chip family
// Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/leds.h>
#include <linux/led-class-flash.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#define LM3601X_LED_IR 0x0
#define LM3601X_LED_TORCH 0x1
/* Registers */
#define LM3601X_ENABLE_REG 0x01
#define LM3601X_CFG_REG 0x02
#define LM3601X_LED_FLASH_REG 0x03
#define LM3601X_LED_TORCH_REG 0x04
#define LM3601X_FLAGS_REG 0x05
#define LM3601X_DEV_ID_REG 0x06
#define LM3601X_SW_RESET BIT(7)
/* Enable Mode bits */
#define LM3601X_MODE_STANDBY 0x00
#define LM3601X_MODE_IR_DRV BIT(0)
#define LM3601X_MODE_TORCH BIT(1)
#define LM3601X_MODE_STROBE (BIT(0) | BIT(1))
#define LM3601X_STRB_EN BIT(2)
#define LM3601X_STRB_EDGE_TRIG BIT(3)
#define LM3601X_IVFM_EN BIT(4)
#define LM36010_BOOST_LIMIT_28 BIT(5)
#define LM36010_BOOST_FREQ_4MHZ BIT(6)
#define LM36010_BOOST_MODE_PASS BIT(7)
/* Flag Mask */
#define LM3601X_FLASH_TIME_OUT BIT(0)
#define LM3601X_UVLO_FAULT BIT(1)
#define LM3601X_THERM_SHUTDOWN BIT(2)
#define LM3601X_THERM_CURR BIT(3)
#define LM36010_CURR_LIMIT BIT(4)
#define LM3601X_SHORT_FAULT BIT(5)
#define LM3601X_IVFM_TRIP BIT(6)
#define LM36010_OVP_FAULT BIT(7)
#define LM3601X_MAX_TORCH_I_UA 376000
#define LM3601X_MIN_TORCH_I_UA 2400
#define LM3601X_TORCH_REG_DIV 2965
#define LM3601X_MAX_STROBE_I_UA 1500000
#define LM3601X_MIN_STROBE_I_UA 11000
#define LM3601X_STROBE_REG_DIV 11800
#define LM3601X_TIMEOUT_MASK 0x1e
#define LM3601X_ENABLE_MASK (LM3601X_MODE_IR_DRV | LM3601X_MODE_TORCH)
#define LM3601X_LOWER_STEP_US 40000
#define LM3601X_UPPER_STEP_US 200000
#define LM3601X_MIN_TIMEOUT_US 40000
#define LM3601X_MAX_TIMEOUT_US 1600000
#define LM3601X_TIMEOUT_XOVER_US 400000
enum lm3601x_type {
CHIP_LM36010 = 0,
CHIP_LM36011,
};
/**
* struct lm3601x_led -
* @fled_cdev: flash LED class device pointer
* @client: Pointer to the I2C client
* @regmap: Devices register map
* @lock: Lock for reading/writing the device
* @led_name: LED label for the Torch or IR LED
* @flash_timeout: the timeout for the flash
* @last_flag: last known flags register value
* @torch_current_max: maximum current for the torch
* @flash_current_max: maximum current for the flash
* @max_flash_timeout: maximum timeout for the flash
* @led_mode: The mode to enable either IR or Torch
*/
struct lm3601x_led {
struct led_classdev_flash fled_cdev;
struct i2c_client *client;
struct regmap *regmap;
struct mutex lock;
unsigned int flash_timeout;
unsigned int last_flag;
u32 torch_current_max;
u32 flash_current_max;
u32 max_flash_timeout;
u32 led_mode;
};
static const struct reg_default lm3601x_regmap_defs[] = {
{ LM3601X_ENABLE_REG, 0x20 },
{ LM3601X_CFG_REG, 0x15 },
{ LM3601X_LED_FLASH_REG, 0x00 },
{ LM3601X_LED_TORCH_REG, 0x00 },
};
static bool lm3601x_volatile_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case LM3601X_FLAGS_REG:
return true;
default:
return false;
}
}
static const struct regmap_config lm3601x_regmap = {
.reg_bits = 8,
.val_bits = 8,
.max_register = LM3601X_DEV_ID_REG,
.reg_defaults = lm3601x_regmap_defs,
.num_reg_defaults = ARRAY_SIZE(lm3601x_regmap_defs),
.cache_type = REGCACHE_RBTREE,
.volatile_reg = lm3601x_volatile_reg,
};
static struct lm3601x_led *fled_cdev_to_led(struct led_classdev_flash *fled_cdev)
{
return container_of(fled_cdev, struct lm3601x_led, fled_cdev);
}
static int lm3601x_read_faults(struct lm3601x_led *led)
{
int flags_val;
int ret;
ret = regmap_read(led->regmap, LM3601X_FLAGS_REG, &flags_val);
if (ret < 0)
return -EIO;
led->last_flag = 0;
if (flags_val & LM36010_OVP_FAULT)
led->last_flag |= LED_FAULT_OVER_VOLTAGE;
if (flags_val & (LM3601X_THERM_SHUTDOWN | LM3601X_THERM_CURR))
led->last_flag |= LED_FAULT_OVER_TEMPERATURE;
if (flags_val & LM3601X_SHORT_FAULT)
led->last_flag |= LED_FAULT_SHORT_CIRCUIT;
if (flags_val & LM36010_CURR_LIMIT)
led->last_flag |= LED_FAULT_OVER_CURRENT;
if (flags_val & LM3601X_UVLO_FAULT)
led->last_flag |= LED_FAULT_UNDER_VOLTAGE;
if (flags_val & LM3601X_IVFM_TRIP)
led->last_flag |= LED_FAULT_INPUT_VOLTAGE;
if (flags_val & LM3601X_THERM_SHUTDOWN)
led->last_flag |= LED_FAULT_LED_OVER_TEMPERATURE;
return led->last_flag;
}
static int lm3601x_brightness_set(struct led_classdev *cdev,
enum led_brightness brightness)
{
struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(cdev);
struct lm3601x_led *led = fled_cdev_to_led(fled_cdev);
int ret, led_mode_val;
mutex_lock(&led->lock);
ret = lm3601x_read_faults(led);
if (ret < 0)
goto out;
if (led->led_mode == LM3601X_LED_TORCH)
led_mode_val = LM3601X_MODE_TORCH;
else
led_mode_val = LM3601X_MODE_IR_DRV;
if (brightness == LED_OFF) {
ret = regmap_update_bits(led->regmap, LM3601X_ENABLE_REG,
led_mode_val, LED_OFF);
goto out;
}
ret = regmap_write(led->regmap, LM3601X_LED_TORCH_REG, brightness);
if (ret < 0)
goto out;
ret = regmap_update_bits(led->regmap, LM3601X_ENABLE_REG,
LM3601X_MODE_TORCH | LM3601X_MODE_IR_DRV,
led_mode_val);
out:
mutex_unlock(&led->lock);
return ret;
}
static int lm3601x_strobe_set(struct led_classdev_flash *fled_cdev,
bool state)
{
struct lm3601x_led *led = fled_cdev_to_led(fled_cdev);
int timeout_reg_val;
int current_timeout;
int ret;
mutex_lock(&led->lock);
ret = regmap_read(led->regmap, LM3601X_CFG_REG, ¤t_timeout);
if (ret < 0)
goto out;
if (led->flash_timeout >= LM3601X_TIMEOUT_XOVER_US)
timeout_reg_val = led->flash_timeout / LM3601X_UPPER_STEP_US + 0x07;
else
timeout_reg_val = led->flash_timeout / LM3601X_LOWER_STEP_US - 0x01;
if (led->flash_timeout != current_timeout)
ret = regmap_update_bits(led->regmap, LM3601X_CFG_REG,
LM3601X_TIMEOUT_MASK, timeout_reg_val);
if (state)
ret = regmap_update_bits(led->regmap, LM3601X_ENABLE_REG,
LM3601X_MODE_TORCH | LM3601X_MODE_IR_DRV,
LM3601X_MODE_STROBE);
else
ret = regmap_update_bits(led->regmap, LM3601X_ENABLE_REG,
LM3601X_MODE_STROBE, LED_OFF);
ret = lm3601x_read_faults(led);
out:
mutex_unlock(&led->lock);
return ret;
}
static int lm3601x_flash_brightness_set(struct led_classdev_flash *fled_cdev,
u32 brightness)
{
struct lm3601x_led *led = fled_cdev_to_led(fled_cdev);
u8 brightness_val;
int ret;
mutex_lock(&led->lock);
ret = lm3601x_read_faults(led);
if (ret < 0)
goto out;
if (brightness == LED_OFF) {
ret = regmap_update_bits(led->regmap, LM3601X_ENABLE_REG,
LM3601X_MODE_STROBE, LED_OFF);
goto out;
}
brightness_val = brightness / LM3601X_STROBE_REG_DIV;
ret = regmap_write(led->regmap, LM3601X_LED_FLASH_REG, brightness_val);
out:
mutex_unlock(&led->lock);
return ret;
}
static int lm3601x_flash_timeout_set(struct led_classdev_flash *fled_cdev,
u32 timeout)
{
struct lm3601x_led *led = fled_cdev_to_led(fled_cdev);
mutex_lock(&led->lock);
led->flash_timeout = timeout;
mutex_unlock(&led->lock);
return 0;
}
static int lm3601x_strobe_get(struct led_classdev_flash *fled_cdev, bool *state)
{
struct lm3601x_led *led = fled_cdev_to_led(fled_cdev);
int strobe_state;
int ret;
mutex_lock(&led->lock);
ret = regmap_read(led->regmap, LM3601X_ENABLE_REG, &strobe_state);
if (ret < 0)
goto out;
*state = strobe_state & LM3601X_MODE_STROBE;
out:
mutex_unlock(&led->lock);
return ret;
}
static int lm3601x_flash_fault_get(struct led_classdev_flash *fled_cdev,
u32 *fault)
{
struct lm3601x_led *led = fled_cdev_to_led(fled_cdev);
lm3601x_read_faults(led);
*fault = led->last_flag;
return 0;
}
static const struct led_flash_ops flash_ops = {
.flash_brightness_set = lm3601x_flash_brightness_set,
.strobe_set = lm3601x_strobe_set,
.strobe_get = lm3601x_strobe_get,
.timeout_set = lm3601x_flash_timeout_set,
.fault_get = lm3601x_flash_fault_get,
};
static int lm3601x_register_leds(struct lm3601x_led *led,
struct fwnode_handle *fwnode)
{
struct led_classdev *led_cdev;
struct led_flash_setting *setting;
struct led_init_data init_data = {};
led->fled_cdev.ops = &flash_ops;
setting = &led->fled_cdev.timeout;
setting->min = LM3601X_MIN_TIMEOUT_US;
setting->max = led->max_flash_timeout;
setting->step = LM3601X_LOWER_STEP_US;
setting->val = led->max_flash_timeout;
setting = &led->fled_cdev.brightness;
setting->min = LM3601X_MIN_STROBE_I_UA;
setting->max = led->flash_current_max;
setting->step = LM3601X_TORCH_REG_DIV;
setting->val = led->flash_current_max;
led_cdev = &led->fled_cdev.led_cdev;
led_cdev->brightness_set_blocking = lm3601x_brightness_set;
led_cdev->max_brightness = DIV_ROUND_UP(led->torch_current_max,
LM3601X_TORCH_REG_DIV);
led_cdev->flags |= LED_DEV_CAP_FLASH;
init_data.fwnode = fwnode;
init_data.devicename = led->client->name;
init_data.default_label = (led->led_mode == LM3601X_LED_TORCH) ?
"torch" : "infrared";
return devm_led_classdev_flash_register_ext(&led->client->dev,
&led->fled_cdev, &init_data);
}
static int lm3601x_parse_node(struct lm3601x_led *led,
struct fwnode_handle **fwnode)
{
struct fwnode_handle *child = NULL;
int ret = -ENODEV;
child = device_get_next_child_node(&led->client->dev, child);
if (!child) {
dev_err(&led->client->dev, "No LED Child node\n");
return ret;
}
ret = fwnode_property_read_u32(child, "reg", &led->led_mode);
if (ret) {
dev_err(&led->client->dev, "reg DT property missing\n");
goto out_err;
}
if (led->led_mode > LM3601X_LED_TORCH ||
led->led_mode < LM3601X_LED_IR) {
dev_warn(&led->client->dev, "Invalid led mode requested\n");
ret = -EINVAL;
goto out_err;
}
ret = fwnode_property_read_u32(child, "led-max-microamp",
&led->torch_current_max);
if (ret) {
dev_warn(&led->client->dev,
"led-max-microamp DT property missing\n");
goto out_err;
}
ret = fwnode_property_read_u32(child, "flash-max-microamp",
&led->flash_current_max);
if (ret) {
dev_warn(&led->client->dev,
"flash-max-microamp DT property missing\n");
goto out_err;
}
ret = fwnode_property_read_u32(child, "flash-max-timeout-us",
&led->max_flash_timeout);
if (ret) {
dev_warn(&led->client->dev,
"flash-max-timeout-us DT property missing\n");
goto out_err;
}
*fwnode = child;
out_err:
fwnode_handle_put(child);
return ret;
}
static int lm3601x_probe(struct i2c_client *client)
{
struct lm3601x_led *led;
struct fwnode_handle *fwnode;
int ret;
led = devm_kzalloc(&client->dev, sizeof(*led), GFP_KERNEL);
if (!led)
return -ENOMEM;
led->client = client;
i2c_set_clientdata(client, led);
ret = lm3601x_parse_node(led, &fwnode);
if (ret)
return -ENODEV;
led->regmap = devm_regmap_init_i2c(client, &lm3601x_regmap);
if (IS_ERR(led->regmap)) {
ret = PTR_ERR(led->regmap);
dev_err(&client->dev,
"Failed to allocate register map: %d\n", ret);
return ret;
}
mutex_init(&led->lock);
return lm3601x_register_leds(led, fwnode);
}
static void lm3601x_remove(struct i2c_client *client)
{
struct lm3601x_led *led = i2c_get_clientdata(client);
int ret;
ret = regmap_update_bits(led->regmap, LM3601X_ENABLE_REG,
LM3601X_ENABLE_MASK, LM3601X_MODE_STANDBY);
if (ret)
dev_warn(&client->dev,
"Failed to put into standby (%pe)\n", ERR_PTR(ret));
}
static const struct i2c_device_id lm3601x_id[] = {
{ "LM36010", CHIP_LM36010 },
{ "LM36011", CHIP_LM36011 },
{ }
};
MODULE_DEVICE_TABLE(i2c, lm3601x_id);
static const struct of_device_id of_lm3601x_leds_match[] = {
{ .compatible = "ti,lm36010", },
{ .compatible = "ti,lm36011", },
{ }
};
MODULE_DEVICE_TABLE(of, of_lm3601x_leds_match);
static struct i2c_driver lm3601x_i2c_driver = {
.driver = {
.name = "lm3601x",
.of_match_table = of_lm3601x_leds_match,
},
.probe = lm3601x_probe,
.remove = lm3601x_remove,
.id_table = lm3601x_id,
};
module_i2c_driver(lm3601x_i2c_driver);
MODULE_DESCRIPTION("Texas Instruments Flash Lighting driver for LM3601X");
MODULE_AUTHOR("Dan Murphy <[email protected]>");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/leds/flash/leds-lm3601x.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
*/
#include <linux/bitfield.h>
#include <linux/bits.h>
#include <linux/leds.h>
#include <linux/led-class-flash.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/property.h>
#include <linux/regmap.h>
#include <media/v4l2-flash-led-class.h>
/* registers definitions */
#define FLASH_TYPE_REG 0x04
#define FLASH_TYPE_VAL 0x18
#define FLASH_SUBTYPE_REG 0x05
#define FLASH_SUBTYPE_3CH_PM8150_VAL 0x04
#define FLASH_SUBTYPE_3CH_PMI8998_VAL 0x03
#define FLASH_SUBTYPE_4CH_VAL 0x07
#define FLASH_STS_3CH_OTST1 BIT(0)
#define FLASH_STS_3CH_OTST2 BIT(1)
#define FLASH_STS_3CH_OTST3 BIT(2)
#define FLASH_STS_3CH_BOB_THM_OVERLOAD BIT(3)
#define FLASH_STS_3CH_VPH_DROOP BIT(4)
#define FLASH_STS_3CH_BOB_ILIM_S1 BIT(5)
#define FLASH_STS_3CH_BOB_ILIM_S2 BIT(6)
#define FLASH_STS_3CH_BCL_IBAT BIT(7)
#define FLASH_STS_4CH_VPH_LOW BIT(0)
#define FLASH_STS_4CH_BCL_IBAT BIT(1)
#define FLASH_STS_4CH_BOB_ILIM_S1 BIT(2)
#define FLASH_STS_4CH_BOB_ILIM_S2 BIT(3)
#define FLASH_STS_4CH_OTST2 BIT(4)
#define FLASH_STS_4CH_OTST1 BIT(5)
#define FLASH_STS_4CHG_BOB_THM_OVERLOAD BIT(6)
#define FLASH_TIMER_EN_BIT BIT(7)
#define FLASH_TIMER_VAL_MASK GENMASK(6, 0)
#define FLASH_TIMER_STEP_MS 10
#define FLASH_STROBE_HW_SW_SEL_BIT BIT(2)
#define SW_STROBE_VAL 0
#define HW_STROBE_VAL 1
#define FLASH_HW_STROBE_TRIGGER_SEL_BIT BIT(1)
#define STROBE_LEVEL_TRIGGER_VAL 0
#define STROBE_EDGE_TRIGGER_VAL 1
#define FLASH_STROBE_POLARITY_BIT BIT(0)
#define STROBE_ACTIVE_HIGH_VAL 1
#define FLASH_IRES_MASK_4CH BIT(0)
#define FLASH_IRES_MASK_3CH GENMASK(1, 0)
#define FLASH_IRES_12P5MA_VAL 0
#define FLASH_IRES_5MA_VAL_4CH 1
#define FLASH_IRES_5MA_VAL_3CH 3
/* constants */
#define FLASH_CURRENT_MAX_UA 1500000
#define TORCH_CURRENT_MAX_UA 500000
#define FLASH_TOTAL_CURRENT_MAX_UA 2000000
#define FLASH_CURRENT_DEFAULT_UA 1000000
#define TORCH_CURRENT_DEFAULT_UA 200000
#define TORCH_IRES_UA 5000
#define FLASH_IRES_UA 12500
#define FLASH_TIMEOUT_MAX_US 1280000
#define FLASH_TIMEOUT_STEP_US 10000
#define UA_PER_MA 1000
enum hw_type {
QCOM_MVFLASH_3CH,
QCOM_MVFLASH_4CH,
};
enum led_mode {
FLASH_MODE,
TORCH_MODE,
};
enum led_strobe {
SW_STROBE,
HW_STROBE,
};
enum {
REG_STATUS1,
REG_STATUS2,
REG_STATUS3,
REG_CHAN_TIMER,
REG_ITARGET,
REG_MODULE_EN,
REG_IRESOLUTION,
REG_CHAN_STROBE,
REG_CHAN_EN,
REG_MAX_COUNT,
};
static struct reg_field mvflash_3ch_regs[REG_MAX_COUNT] = {
REG_FIELD(0x08, 0, 7), /* status1 */
REG_FIELD(0x09, 0, 7), /* status2 */
REG_FIELD(0x0a, 0, 7), /* status3 */
REG_FIELD_ID(0x40, 0, 7, 3, 1), /* chan_timer */
REG_FIELD_ID(0x43, 0, 6, 3, 1), /* itarget */
REG_FIELD(0x46, 7, 7), /* module_en */
REG_FIELD(0x47, 0, 5), /* iresolution */
REG_FIELD_ID(0x49, 0, 2, 3, 1), /* chan_strobe */
REG_FIELD(0x4c, 0, 2), /* chan_en */
};
static struct reg_field mvflash_4ch_regs[REG_MAX_COUNT] = {
REG_FIELD(0x06, 0, 7), /* status1 */
REG_FIELD(0x07, 0, 6), /* status2 */
REG_FIELD(0x09, 0, 7), /* status3 */
REG_FIELD_ID(0x3e, 0, 7, 4, 1), /* chan_timer */
REG_FIELD_ID(0x42, 0, 6, 4, 1), /* itarget */
REG_FIELD(0x46, 7, 7), /* module_en */
REG_FIELD(0x49, 0, 3), /* iresolution */
REG_FIELD_ID(0x4a, 0, 6, 4, 1), /* chan_strobe */
REG_FIELD(0x4e, 0, 3), /* chan_en */
};
struct qcom_flash_data {
struct v4l2_flash **v4l2_flash;
struct regmap_field *r_fields[REG_MAX_COUNT];
struct mutex lock;
enum hw_type hw_type;
u8 leds_count;
u8 max_channels;
u8 chan_en_bits;
};
struct qcom_flash_led {
struct qcom_flash_data *flash_data;
struct led_classdev_flash flash;
u32 max_flash_current_ma;
u32 max_torch_current_ma;
u32 max_timeout_ms;
u32 flash_current_ma;
u32 flash_timeout_ms;
u8 *chan_id;
u8 chan_count;
bool enabled;
};
static int set_flash_module_en(struct qcom_flash_led *led, bool en)
{
struct qcom_flash_data *flash_data = led->flash_data;
u8 led_mask = 0, enable;
int i, rc;
for (i = 0; i < led->chan_count; i++)
led_mask |= BIT(led->chan_id[i]);
mutex_lock(&flash_data->lock);
if (en)
flash_data->chan_en_bits |= led_mask;
else
flash_data->chan_en_bits &= ~led_mask;
enable = !!flash_data->chan_en_bits;
rc = regmap_field_write(flash_data->r_fields[REG_MODULE_EN], enable);
if (rc)
dev_err(led->flash.led_cdev.dev, "write module_en failed, rc=%d\n", rc);
mutex_unlock(&flash_data->lock);
return rc;
}
static int set_flash_current(struct qcom_flash_led *led, u32 current_ma, enum led_mode mode)
{
struct qcom_flash_data *flash_data = led->flash_data;
u32 itarg_ua, ires_ua;
u8 shift, ires_mask = 0, ires_val = 0, chan_id;
int i, rc;
/*
* Split the current across the channels and set the
* IRESOLUTION and ITARGET registers accordingly.
*/
itarg_ua = (current_ma * UA_PER_MA) / led->chan_count + 1;
ires_ua = (mode == FLASH_MODE) ? FLASH_IRES_UA : TORCH_IRES_UA;
for (i = 0; i < led->chan_count; i++) {
u8 itarget = 0;
if (itarg_ua > ires_ua)
itarget = itarg_ua / ires_ua - 1;
chan_id = led->chan_id[i];
rc = regmap_fields_write(flash_data->r_fields[REG_ITARGET], chan_id, itarget);
if (rc)
return rc;
if (flash_data->hw_type == QCOM_MVFLASH_3CH) {
shift = chan_id * 2;
ires_mask |= FLASH_IRES_MASK_3CH << shift;
ires_val |= ((mode == FLASH_MODE) ?
(FLASH_IRES_12P5MA_VAL << shift) :
(FLASH_IRES_5MA_VAL_3CH << shift));
} else if (flash_data->hw_type == QCOM_MVFLASH_4CH) {
shift = chan_id;
ires_mask |= FLASH_IRES_MASK_4CH << shift;
ires_val |= ((mode == FLASH_MODE) ?
(FLASH_IRES_12P5MA_VAL << shift) :
(FLASH_IRES_5MA_VAL_4CH << shift));
} else {
dev_err(led->flash.led_cdev.dev,
"HW type %d is not supported\n", flash_data->hw_type);
return -EOPNOTSUPP;
}
}
return regmap_field_update_bits(flash_data->r_fields[REG_IRESOLUTION], ires_mask, ires_val);
}
static int set_flash_timeout(struct qcom_flash_led *led, u32 timeout_ms)
{
struct qcom_flash_data *flash_data = led->flash_data;
u8 timer, chan_id;
int rc, i;
/* set SAFETY_TIMER for all the channels connected to the same LED */
timeout_ms = min_t(u32, timeout_ms, led->max_timeout_ms);
for (i = 0; i < led->chan_count; i++) {
chan_id = led->chan_id[i];
timer = timeout_ms / FLASH_TIMER_STEP_MS;
timer = clamp_t(u8, timer, 0, FLASH_TIMER_VAL_MASK);
if (timeout_ms)
timer |= FLASH_TIMER_EN_BIT;
rc = regmap_fields_write(flash_data->r_fields[REG_CHAN_TIMER], chan_id, timer);
if (rc)
return rc;
}
return 0;
}
static int set_flash_strobe(struct qcom_flash_led *led, enum led_strobe strobe, bool state)
{
struct qcom_flash_data *flash_data = led->flash_data;
u8 strobe_sel, chan_en, chan_id, chan_mask = 0;
int rc, i;
/* Set SW strobe config for all channels connected to the LED */
for (i = 0; i < led->chan_count; i++) {
chan_id = led->chan_id[i];
if (strobe == SW_STROBE)
strobe_sel = FIELD_PREP(FLASH_STROBE_HW_SW_SEL_BIT, SW_STROBE_VAL);
else
strobe_sel = FIELD_PREP(FLASH_STROBE_HW_SW_SEL_BIT, HW_STROBE_VAL);
strobe_sel |=
FIELD_PREP(FLASH_HW_STROBE_TRIGGER_SEL_BIT, STROBE_LEVEL_TRIGGER_VAL) |
FIELD_PREP(FLASH_STROBE_POLARITY_BIT, STROBE_ACTIVE_HIGH_VAL);
rc = regmap_fields_write(
flash_data->r_fields[REG_CHAN_STROBE], chan_id, strobe_sel);
if (rc)
return rc;
chan_mask |= BIT(chan_id);
}
/* Enable/disable flash channels */
chan_en = state ? chan_mask : 0;
rc = regmap_field_update_bits(flash_data->r_fields[REG_CHAN_EN], chan_mask, chan_en);
if (rc)
return rc;
led->enabled = state;
return 0;
}
static inline struct qcom_flash_led *flcdev_to_qcom_fled(struct led_classdev_flash *flcdev)
{
return container_of(flcdev, struct qcom_flash_led, flash);
}
static int qcom_flash_brightness_set(struct led_classdev_flash *fled_cdev, u32 brightness)
{
struct qcom_flash_led *led = flcdev_to_qcom_fled(fled_cdev);
led->flash_current_ma = min_t(u32, led->max_flash_current_ma, brightness / UA_PER_MA);
return 0;
}
static int qcom_flash_timeout_set(struct led_classdev_flash *fled_cdev, u32 timeout)
{
struct qcom_flash_led *led = flcdev_to_qcom_fled(fled_cdev);
led->flash_timeout_ms = timeout / USEC_PER_MSEC;
return 0;
}
static int qcom_flash_strobe_set(struct led_classdev_flash *fled_cdev, bool state)
{
struct qcom_flash_led *led = flcdev_to_qcom_fled(fled_cdev);
int rc;
rc = set_flash_strobe(led, SW_STROBE, false);
if (rc)
return rc;
rc = set_flash_current(led, led->flash_current_ma, FLASH_MODE);
if (rc)
return rc;
rc = set_flash_timeout(led, led->flash_timeout_ms);
if (rc)
return rc;
rc = set_flash_module_en(led, state);
if (rc)
return rc;
return set_flash_strobe(led, SW_STROBE, state);
}
static int qcom_flash_strobe_get(struct led_classdev_flash *fled_cdev, bool *state)
{
struct qcom_flash_led *led = flcdev_to_qcom_fled(fled_cdev);
*state = led->enabled;
return 0;
}
static int qcom_flash_fault_get(struct led_classdev_flash *fled_cdev, u32 *fault)
{
struct qcom_flash_led *led = flcdev_to_qcom_fled(fled_cdev);
struct qcom_flash_data *flash_data = led->flash_data;
u8 shift, chan_id, chan_mask = 0;
u8 ot_mask = 0, oc_mask = 0, uv_mask = 0;
u32 val, fault_sts = 0;
int i, rc;
rc = regmap_field_read(flash_data->r_fields[REG_STATUS1], &val);
if (rc)
return rc;
for (i = 0; i < led->chan_count; i++) {
chan_id = led->chan_id[i];
shift = chan_id * 2;
if (val & BIT(shift))
fault_sts |= LED_FAULT_SHORT_CIRCUIT;
chan_mask |= BIT(chan_id);
}
rc = regmap_field_read(flash_data->r_fields[REG_STATUS2], &val);
if (rc)
return rc;
if (flash_data->hw_type == QCOM_MVFLASH_3CH) {
ot_mask = FLASH_STS_3CH_OTST1 |
FLASH_STS_3CH_OTST2 |
FLASH_STS_3CH_OTST3 |
FLASH_STS_3CH_BOB_THM_OVERLOAD;
oc_mask = FLASH_STS_3CH_BOB_ILIM_S1 |
FLASH_STS_3CH_BOB_ILIM_S2 |
FLASH_STS_3CH_BCL_IBAT;
uv_mask = FLASH_STS_3CH_VPH_DROOP;
} else if (flash_data->hw_type == QCOM_MVFLASH_4CH) {
ot_mask = FLASH_STS_4CH_OTST2 |
FLASH_STS_4CH_OTST1 |
FLASH_STS_4CHG_BOB_THM_OVERLOAD;
oc_mask = FLASH_STS_4CH_BCL_IBAT |
FLASH_STS_4CH_BOB_ILIM_S1 |
FLASH_STS_4CH_BOB_ILIM_S2;
uv_mask = FLASH_STS_4CH_VPH_LOW;
}
if (val & ot_mask)
fault_sts |= LED_FAULT_OVER_TEMPERATURE;
if (val & oc_mask)
fault_sts |= LED_FAULT_OVER_CURRENT;
if (val & uv_mask)
fault_sts |= LED_FAULT_INPUT_VOLTAGE;
rc = regmap_field_read(flash_data->r_fields[REG_STATUS3], &val);
if (rc)
return rc;
if (flash_data->hw_type == QCOM_MVFLASH_3CH) {
if (val & chan_mask)
fault_sts |= LED_FAULT_TIMEOUT;
} else if (flash_data->hw_type == QCOM_MVFLASH_4CH) {
for (i = 0; i < led->chan_count; i++) {
chan_id = led->chan_id[i];
shift = chan_id * 2;
if (val & BIT(shift))
fault_sts |= LED_FAULT_TIMEOUT;
}
}
*fault = fault_sts;
return 0;
}
static int qcom_flash_led_brightness_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
struct qcom_flash_led *led = flcdev_to_qcom_fled(fled_cdev);
u32 current_ma = brightness * led->max_torch_current_ma / LED_FULL;
bool enable = !!brightness;
int rc;
rc = set_flash_strobe(led, SW_STROBE, false);
if (rc)
return rc;
rc = set_flash_module_en(led, false);
if (rc)
return rc;
rc = set_flash_current(led, current_ma, TORCH_MODE);
if (rc)
return rc;
/* Disable flash timeout for torch LED */
rc = set_flash_timeout(led, 0);
if (rc)
return rc;
rc = set_flash_module_en(led, enable);
if (rc)
return rc;
return set_flash_strobe(led, SW_STROBE, enable);
}
static const struct led_flash_ops qcom_flash_ops = {
.flash_brightness_set = qcom_flash_brightness_set,
.strobe_set = qcom_flash_strobe_set,
.strobe_get = qcom_flash_strobe_get,
.timeout_set = qcom_flash_timeout_set,
.fault_get = qcom_flash_fault_get,
};
#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS)
static int qcom_flash_external_strobe_set(struct v4l2_flash *v4l2_flash, bool enable)
{
struct led_classdev_flash *fled_cdev = v4l2_flash->fled_cdev;
struct qcom_flash_led *led = flcdev_to_qcom_fled(fled_cdev);
int rc;
rc = set_flash_module_en(led, enable);
if (rc)
return rc;
if (enable)
return set_flash_strobe(led, HW_STROBE, true);
else
return set_flash_strobe(led, SW_STROBE, false);
}
static enum led_brightness
qcom_flash_intensity_to_led_brightness(struct v4l2_flash *v4l2_flash, s32 intensity)
{
struct led_classdev_flash *fled_cdev = v4l2_flash->fled_cdev;
struct qcom_flash_led *led = flcdev_to_qcom_fled(fled_cdev);
u32 current_ma = intensity / UA_PER_MA;
current_ma = min_t(u32, current_ma, led->max_torch_current_ma);
if (!current_ma)
return LED_OFF;
return (current_ma * LED_FULL) / led->max_torch_current_ma;
}
static s32 qcom_flash_brightness_to_led_intensity(struct v4l2_flash *v4l2_flash,
enum led_brightness brightness)
{
struct led_classdev_flash *fled_cdev = v4l2_flash->fled_cdev;
struct qcom_flash_led *led = flcdev_to_qcom_fled(fled_cdev);
return (brightness * led->max_torch_current_ma * UA_PER_MA) / LED_FULL;
}
static const struct v4l2_flash_ops qcom_v4l2_flash_ops = {
.external_strobe_set = qcom_flash_external_strobe_set,
.intensity_to_led_brightness = qcom_flash_intensity_to_led_brightness,
.led_brightness_to_intensity = qcom_flash_brightness_to_led_intensity,
};
static int
qcom_flash_v4l2_init(struct device *dev, struct qcom_flash_led *led, struct fwnode_handle *fwnode)
{
struct qcom_flash_data *flash_data = led->flash_data;
struct v4l2_flash_config v4l2_cfg = { 0 };
struct led_flash_setting *intensity = &v4l2_cfg.intensity;
if (!(led->flash.led_cdev.flags & LED_DEV_CAP_FLASH))
return 0;
intensity->min = intensity->step = TORCH_IRES_UA * led->chan_count;
intensity->max = led->max_torch_current_ma * UA_PER_MA;
intensity->val = min_t(u32, intensity->max, TORCH_CURRENT_DEFAULT_UA);
strscpy(v4l2_cfg.dev_name, led->flash.led_cdev.dev->kobj.name,
sizeof(v4l2_cfg.dev_name));
v4l2_cfg.has_external_strobe = true;
v4l2_cfg.flash_faults = LED_FAULT_INPUT_VOLTAGE |
LED_FAULT_OVER_CURRENT |
LED_FAULT_SHORT_CIRCUIT |
LED_FAULT_OVER_TEMPERATURE |
LED_FAULT_TIMEOUT;
flash_data->v4l2_flash[flash_data->leds_count] =
v4l2_flash_init(dev, fwnode, &led->flash, &qcom_v4l2_flash_ops, &v4l2_cfg);
return PTR_ERR_OR_ZERO(flash_data->v4l2_flash);
}
# else
static int
qcom_flash_v4l2_init(struct device *dev, struct qcom_flash_led *led, struct fwnode_handle *fwnode)
{
return 0;
}
#endif
static int qcom_flash_register_led_device(struct device *dev,
struct fwnode_handle *node, struct qcom_flash_led *led)
{
struct qcom_flash_data *flash_data = led->flash_data;
struct led_init_data init_data;
struct led_classdev_flash *flash = &led->flash;
struct led_flash_setting *brightness, *timeout;
u32 current_ua, timeout_us;
u32 channels[4];
int i, rc, count;
count = fwnode_property_count_u32(node, "led-sources");
if (count <= 0) {
dev_err(dev, "No led-sources specified\n");
return -ENODEV;
}
if (count > flash_data->max_channels) {
dev_err(dev, "led-sources count %u exceeds maximum channel count %u\n",
count, flash_data->max_channels);
return -EINVAL;
}
rc = fwnode_property_read_u32_array(node, "led-sources", channels, count);
if (rc < 0) {
dev_err(dev, "Failed to read led-sources property, rc=%d\n", rc);
return rc;
}
led->chan_count = count;
led->chan_id = devm_kcalloc(dev, count, sizeof(u8), GFP_KERNEL);
if (!led->chan_id)
return -ENOMEM;
for (i = 0; i < count; i++) {
if ((channels[i] == 0) || (channels[i] > flash_data->max_channels)) {
dev_err(dev, "led-source out of HW support range [1-%u]\n",
flash_data->max_channels);
return -EINVAL;
}
/* Make chan_id indexing from 0 */
led->chan_id[i] = channels[i] - 1;
}
rc = fwnode_property_read_u32(node, "led-max-microamp", ¤t_ua);
if (rc < 0) {
dev_err(dev, "Failed to read led-max-microamp property, rc=%d\n", rc);
return rc;
}
if (current_ua == 0) {
dev_err(dev, "led-max-microamp shouldn't be 0\n");
return -EINVAL;
}
current_ua = min_t(u32, current_ua, TORCH_CURRENT_MAX_UA * led->chan_count);
led->max_torch_current_ma = current_ua / UA_PER_MA;
if (fwnode_property_present(node, "flash-max-microamp")) {
flash->led_cdev.flags |= LED_DEV_CAP_FLASH;
rc = fwnode_property_read_u32(node, "flash-max-microamp", ¤t_ua);
if (rc < 0) {
dev_err(dev, "Failed to read flash-max-microamp property, rc=%d\n",
rc);
return rc;
}
current_ua = min_t(u32, current_ua, FLASH_CURRENT_MAX_UA * led->chan_count);
current_ua = min_t(u32, current_ua, FLASH_TOTAL_CURRENT_MAX_UA);
/* Initialize flash class LED device brightness settings */
brightness = &flash->brightness;
brightness->min = brightness->step = FLASH_IRES_UA * led->chan_count;
brightness->max = current_ua;
brightness->val = min_t(u32, current_ua, FLASH_CURRENT_DEFAULT_UA);
led->max_flash_current_ma = current_ua / UA_PER_MA;
led->flash_current_ma = brightness->val / UA_PER_MA;
rc = fwnode_property_read_u32(node, "flash-max-timeout-us", &timeout_us);
if (rc < 0) {
dev_err(dev, "Failed to read flash-max-timeout-us property, rc=%d\n",
rc);
return rc;
}
timeout_us = min_t(u32, timeout_us, FLASH_TIMEOUT_MAX_US);
/* Initialize flash class LED device timeout settings */
timeout = &flash->timeout;
timeout->min = timeout->step = FLASH_TIMEOUT_STEP_US;
timeout->val = timeout->max = timeout_us;
led->max_timeout_ms = led->flash_timeout_ms = timeout_us / USEC_PER_MSEC;
flash->ops = &qcom_flash_ops;
}
flash->led_cdev.brightness_set_blocking = qcom_flash_led_brightness_set;
init_data.fwnode = node;
init_data.devicename = NULL;
init_data.default_label = NULL;
init_data.devname_mandatory = false;
rc = devm_led_classdev_flash_register_ext(dev, flash, &init_data);
if (rc < 0) {
dev_err(dev, "Register flash LED classdev failed, rc=%d\n", rc);
return rc;
}
return qcom_flash_v4l2_init(dev, led, node);
}
static int qcom_flash_led_probe(struct platform_device *pdev)
{
struct qcom_flash_data *flash_data;
struct qcom_flash_led *led;
struct fwnode_handle *child;
struct device *dev = &pdev->dev;
struct regmap *regmap;
struct reg_field *regs;
int count, i, rc;
u32 val, reg_base;
flash_data = devm_kzalloc(dev, sizeof(*flash_data), GFP_KERNEL);
if (!flash_data)
return -ENOMEM;
regmap = dev_get_regmap(dev->parent, NULL);
if (!regmap) {
dev_err(dev, "Failed to get parent regmap\n");
return -EINVAL;
}
rc = fwnode_property_read_u32(dev->fwnode, "reg", ®_base);
if (rc < 0) {
dev_err(dev, "Failed to get register base address, rc=%d\n", rc);
return rc;
}
rc = regmap_read(regmap, reg_base + FLASH_TYPE_REG, &val);
if (rc < 0) {
dev_err(dev, "Read flash LED module type failed, rc=%d\n", rc);
return rc;
}
if (val != FLASH_TYPE_VAL) {
dev_err(dev, "type %#x is not a flash LED module\n", val);
return -ENODEV;
}
rc = regmap_read(regmap, reg_base + FLASH_SUBTYPE_REG, &val);
if (rc < 0) {
dev_err(dev, "Read flash LED module subtype failed, rc=%d\n", rc);
return rc;
}
if (val == FLASH_SUBTYPE_3CH_PM8150_VAL || val == FLASH_SUBTYPE_3CH_PMI8998_VAL) {
flash_data->hw_type = QCOM_MVFLASH_3CH;
flash_data->max_channels = 3;
regs = mvflash_3ch_regs;
} else if (val == FLASH_SUBTYPE_4CH_VAL) {
flash_data->hw_type = QCOM_MVFLASH_4CH;
flash_data->max_channels = 4;
regs = mvflash_4ch_regs;
} else {
dev_err(dev, "flash LED subtype %#x is not yet supported\n", val);
return -ENODEV;
}
for (i = 0; i < REG_MAX_COUNT; i++)
regs[i].reg += reg_base;
rc = devm_regmap_field_bulk_alloc(dev, regmap, flash_data->r_fields, regs, REG_MAX_COUNT);
if (rc < 0) {
dev_err(dev, "Failed to allocate regmap field, rc=%d\n", rc);
return rc;
}
platform_set_drvdata(pdev, flash_data);
mutex_init(&flash_data->lock);
count = device_get_child_node_count(dev);
if (count == 0 || count > flash_data->max_channels) {
dev_err(dev, "No child or child count exceeds %d\n", flash_data->max_channels);
return -EINVAL;
}
flash_data->v4l2_flash = devm_kcalloc(dev, count,
sizeof(*flash_data->v4l2_flash), GFP_KERNEL);
if (!flash_data->v4l2_flash)
return -ENOMEM;
device_for_each_child_node(dev, child) {
led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL);
if (!led) {
rc = -ENOMEM;
goto release;
}
led->flash_data = flash_data;
rc = qcom_flash_register_led_device(dev, child, led);
if (rc < 0)
goto release;
flash_data->leds_count++;
}
return 0;
release:
fwnode_handle_put(child);
while (flash_data->v4l2_flash[flash_data->leds_count] && flash_data->leds_count)
v4l2_flash_release(flash_data->v4l2_flash[flash_data->leds_count--]);
return rc;
}
static int qcom_flash_led_remove(struct platform_device *pdev)
{
struct qcom_flash_data *flash_data = platform_get_drvdata(pdev);
while (flash_data->v4l2_flash[flash_data->leds_count] && flash_data->leds_count)
v4l2_flash_release(flash_data->v4l2_flash[flash_data->leds_count--]);
mutex_destroy(&flash_data->lock);
return 0;
}
static const struct of_device_id qcom_flash_led_match_table[] = {
{ .compatible = "qcom,spmi-flash-led" },
{ }
};
MODULE_DEVICE_TABLE(of, qcom_flash_led_match_table);
static struct platform_driver qcom_flash_led_driver = {
.driver = {
.name = "leds-qcom-flash",
.of_match_table = qcom_flash_led_match_table,
},
.probe = qcom_flash_led_probe,
.remove = qcom_flash_led_remove,
};
module_platform_driver(qcom_flash_led_driver);
MODULE_DESCRIPTION("QCOM Flash LED driver");
MODULE_LICENSE("GPL");
| linux-master | drivers/leds/flash/leds-qcom-flash.c |
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