text: /*
   * adm1026.c - Part of lm_sensors, Linux kernel modules for hardware
   *	       monitoring
   * Copyright (C) 2002, 2003  Philip Pokorny <ppokorny@penguincomputing.com>
   * Copyright (C) 2004 Justin Thiessen <jthiessen@penguincomputing.com>
   *
   * Chip details at:
   *
   * <http://www.onsemi.com/PowerSolutions/product.do?id=ADM1026>
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2 of the License, or
   * (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
   */
  
  #include <linux/module.h>
  #include <linux/init.h>
  #include <linux/slab.h>
  #include <linux/jiffies.h>
  #include <linux/i2c.h>
  #include <linux/hwmon.h>
  #include <linux/hwmon-sysfs.h>
  #include <linux/hwmon-vid.h>
  #include <linux/err.h>
  #include <linux/mutex.h>
  
  /* Addresses to scan */
  static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
  
  static int gpio_input[17] = { -1, -1, -1, -1, -1, -1, -1, -1, -1,
  				-1, -1, -1, -1, -1, -1, -1, -1 };
  static int gpio_output[17] = { -1, -1, -1, -1, -1, -1, -1, -1, -1,
  				-1, -1, -1, -1, -1, -1, -1, -1 };
  static int gpio_inverted[17] = { -1, -1, -1, -1, -1, -1, -1, -1, -1,
  				-1, -1, -1, -1, -1, -1, -1, -1 };
  static int gpio_normal[17] = { -1, -1, -1, -1, -1, -1, -1, -1, -1,
  				-1, -1, -1, -1, -1, -1, -1, -1 };
  static int gpio_fan[8] = { -1, -1, -1, -1, -1, -1, -1, -1 };
  module_param_array(gpio_input, int, NULL, 0);
  MODULE_PARM_DESC(gpio_input, "List of GPIO pins (0-16) to program as inputs");
  module_param_array(gpio_output, int, NULL, 0);
  MODULE_PARM_DESC(gpio_output, "List of GPIO pins (0-16) to program as "
  	"outputs");
  module_param_array(gpio_inverted, int, NULL, 0);
  MODULE_PARM_DESC(gpio_inverted, "List of GPIO pins (0-16) to program as "
  	"inverted");
  module_param_array(gpio_normal, int, NULL, 0);
  MODULE_PARM_DESC(gpio_normal, "List of GPIO pins (0-16) to program as "
  	"normal/non-inverted");
  module_param_array(gpio_fan, int, NULL, 0);
  MODULE_PARM_DESC(gpio_fan, "List of GPIO pins (0-7) to program as fan tachs");
  
  /* Many ADM1026 constants specified below */
  
  /* The ADM1026 registers */
  #define ADM1026_REG_CONFIG1	0x00
  #define CFG1_MONITOR		0x01
  #define CFG1_INT_ENABLE		0x02
  #define CFG1_INT_CLEAR		0x04
  #define CFG1_AIN8_9		0x08
  #define CFG1_THERM_HOT		0x10
  #define CFG1_DAC_AFC		0x20
  #define CFG1_PWM_AFC		0x40
  #define CFG1_RESET		0x80
  
  #define ADM1026_REG_CONFIG2	0x01
  /* CONFIG2 controls FAN0/GPIO0 through FAN7/GPIO7 */
  
  #define ADM1026_REG_CONFIG3	0x07
  #define CFG3_GPIO16_ENABLE	0x01
  #define CFG3_CI_CLEAR		0x02
  #define CFG3_VREF_250		0x04
  #define CFG3_GPIO16_DIR		0x40
  #define CFG3_GPIO16_POL		0x80
  
  #define ADM1026_REG_E2CONFIG	0x13
  #define E2CFG_READ		0x01
  #define E2CFG_WRITE		0x02
  #define E2CFG_ERASE		0x04
  #define E2CFG_ROM		0x08
  #define E2CFG_CLK_EXT		0x80
  
  /*
   * There are 10 general analog inputs and 7 dedicated inputs
   * They are:
   *    0 - 9  =  AIN0 - AIN9
   *       10  =  Vbat
   *       11  =  3.3V Standby
   *       12  =  3.3V Main
   *       13  =  +5V
   *       14  =  Vccp (CPU core voltage)
   *       15  =  +12V
   *       16  =  -12V
   */
  static u16 ADM1026_REG_IN[] = {
  		0x30, 0x31, 0x32, 0x33, 0x34, 0x35,
  		0x36, 0x37, 0x27, 0x29, 0x26, 0x2a,
  		0x2b, 0x2c, 0x2d, 0x2e, 0x2f
  	};
  static u16 ADM1026_REG_IN_MIN[] = {
  		0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d,
  		0x5e, 0x5f, 0x6d, 0x49, 0x6b, 0x4a,
  		0x4b, 0x4c, 0x4d, 0x4e, 0x4f
  	};
  static u16 ADM1026_REG_IN_MAX[] = {
  		0x50, 0x51, 0x52, 0x53, 0x54, 0x55,
  		0x56, 0x57, 0x6c, 0x41, 0x6a, 0x42,
  		0x43, 0x44, 0x45, 0x46, 0x47
  	};
  
  /*
   * Temperatures are:
   *    0 - Internal
   *    1 - External 1
   *    2 - External 2
   */
  static u16 ADM1026_REG_TEMP[] = { 0x1f, 0x28, 0x29 };
  static u16 ADM1026_REG_TEMP_MIN[] = { 0x69, 0x48, 0x49 };
  static u16 ADM1026_REG_TEMP_MAX[] = { 0x68, 0x40, 0x41 };
  static u16 ADM1026_REG_TEMP_TMIN[] = { 0x10, 0x11, 0x12 };
  static u16 ADM1026_REG_TEMP_THERM[] = { 0x0d, 0x0e, 0x0f };
  static u16 ADM1026_REG_TEMP_OFFSET[] = { 0x1e, 0x6e, 0x6f };
  
  #define ADM1026_REG_FAN(nr)		(0x38 + (nr))
  #define ADM1026_REG_FAN_MIN(nr)		(0x60 + (nr))
  #define ADM1026_REG_FAN_DIV_0_3		0x02
  #define ADM1026_REG_FAN_DIV_4_7		0x03
  
  #define ADM1026_REG_DAC			0x04
  #define ADM1026_REG_PWM			0x05
  
  #define ADM1026_REG_GPIO_CFG_0_3	0x08
  #define ADM1026_REG_GPIO_CFG_4_7	0x09
  #define ADM1026_REG_GPIO_CFG_8_11	0x0a
  #define ADM1026_REG_GPIO_CFG_12_15	0x0b
  /* CFG_16 in REG_CFG3 */
  #define ADM1026_REG_GPIO_STATUS_0_7	0x24
  #define ADM1026_REG_GPIO_STATUS_8_15	0x25
  /* STATUS_16 in REG_STATUS4 */
  #define ADM1026_REG_GPIO_MASK_0_7	0x1c
  #define ADM1026_REG_GPIO_MASK_8_15	0x1d
  /* MASK_16 in REG_MASK4 */
  
  #define ADM1026_REG_COMPANY		0x16
  #define ADM1026_REG_VERSTEP		0x17
  /* These are the recognized values for the above regs */
  #define ADM1026_COMPANY_ANALOG_DEV	0x41
  #define ADM1026_VERSTEP_GENERIC		0x40
  #define ADM1026_VERSTEP_ADM1026		0x44
  
  #define ADM1026_REG_MASK1		0x18
  #define ADM1026_REG_MASK2		0x19
  #define ADM1026_REG_MASK3		0x1a
  #define ADM1026_REG_MASK4		0x1b
  
  #define ADM1026_REG_STATUS1		0x20
  #define ADM1026_REG_STATUS2		0x21
  #define ADM1026_REG_STATUS3		0x22
  #define ADM1026_REG_STATUS4		0x23
  
  #define ADM1026_FAN_ACTIVATION_TEMP_HYST -6
  #define ADM1026_FAN_CONTROL_TEMP_RANGE	20
  #define ADM1026_PWM_MAX			255
  
  /*
   * Conversions. Rounding and limit checking is only done on the TO_REG
   * variants. Note that you should be a bit careful with which arguments
   * these macros are called: arguments may be evaluated more than once.
   */
  
  /*
   * IN are scaled according to built-in resistors.  These are the
   *   voltages corresponding to 3/4 of full scale (192 or 0xc0)
   *   NOTE: The -12V input needs an additional factor to account
   *      for the Vref pullup resistor.
   *      NEG12_OFFSET = SCALE * Vref / V-192 - Vref
   *                   = 13875 * 2.50 / 1.875 - 2500
   *                   = 16000
   *
   * The values in this table are based on Table II, page 15 of the
   *    datasheet.
   */
  static int adm1026_scaling[] = { /* .001 Volts */
  		2250, 2250, 2250, 2250, 2250, 2250,
  		1875, 1875, 1875, 1875, 3000, 3330,
  		3330, 4995, 2250, 12000, 13875
  	};
  #define NEG12_OFFSET  16000
  #define SCALE(val, from, to) (((val)*(to) + ((from)/2))/(from))
  #define INS_TO_REG(n, val)  (SENSORS_LIMIT(SCALE(val, adm1026_scaling[n], 192),\
  	0, 255))
  #define INS_FROM_REG(n, val) (SCALE(val, 192, adm1026_scaling[n]))
  
  /*
   * FAN speed is measured using 22.5kHz clock and counts for 2 pulses
   *   and we assume a 2 pulse-per-rev fan tach signal
   *      22500 kHz * 60 (sec/min) * 2 (pulse) / 2 (pulse/rev) == 1350000
   */
  #define FAN_TO_REG(val, div)  ((val) <= 0 ? 0xff : \
  				SENSORS_LIMIT(1350000 / ((val) * (div)), \
  					      1, 254))
  #define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : (val) == 0xff ? 0 : \
  				1350000 / ((val) * (div)))
  #define DIV_FROM_REG(val) (1 << (val))
  #define DIV_TO_REG(val) ((val) >= 8 ? 3 : (val) >= 4 ? 2 : (val) >= 2 ? 1 : 0)
  
  /* Temperature is reported in 1 degC increments */
  #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val) + ((val) < 0 ? -500 : 500)) \
  					/ 1000, -127, 127))
  #define TEMP_FROM_REG(val) ((val) * 1000)
  #define OFFSET_TO_REG(val) (SENSORS_LIMIT(((val) + ((val) < 0 ? -500 : 500)) \
  					  / 1000, -127, 127))
  #define OFFSET_FROM_REG(val) ((val) * 1000)
  
  #define PWM_TO_REG(val) (SENSORS_LIMIT(val, 0, 255))
  #define PWM_FROM_REG(val) (val)
  
  #define PWM_MIN_TO_REG(val) ((val) & 0xf0)
  #define PWM_MIN_FROM_REG(val) (((val) & 0xf0) + ((val) >> 4))
  
  /*
   * Analog output is a voltage, and scaled to millivolts.  The datasheet
   *   indicates that the DAC could be used to drive the fans, but in our
   *   example board (Arima HDAMA) it isn't connected to the fans at all.
   */
  #define DAC_TO_REG(val) (SENSORS_LIMIT(((((val) * 255) + 500) / 2500), 0, 255))
  #define DAC_FROM_REG(val) (((val) * 2500) / 255)
  
  /*
   * Chip sampling rates
   *
   * Some sensors are not updated more frequently than once per second
   *    so it doesn't make sense to read them more often than that.
   *    We cache the results and return the saved data if the driver
   *    is called again before a second has elapsed.
   *
   * Also, there is significant configuration data for this chip
   *    So, we keep the config data up to date in the cache
   *    when it is written and only sample it once every 5 *minutes*
   */
  #define ADM1026_DATA_INTERVAL		(1 * HZ)
  #define ADM1026_CONFIG_INTERVAL		(5 * 60 * HZ)
  
  /*
   * We allow for multiple chips in a single system.
   *
   * For each registered ADM1026, we need to keep state information
   * at client->data. The adm1026_data structure is dynamically
   * allocated, when a new client structure is allocated.
   */
  
  struct pwm_data {
  	u8 pwm;
  	u8 enable;
  	u8 auto_pwm_min;
  };
  
  struct adm1026_data {
  	struct device *hwmon_dev;
  
  	struct mutex update_lock;
  	int valid;		/* !=0 if following fields are valid */
  	unsigned long last_reading;	/* In jiffies */
  	unsigned long last_config;	/* In jiffies */
  
  	u8 in[17];		/* Register value */
  	u8 in_max[17];		/* Register value */
  	u8 in_min[17];		/* Register value */
  	s8 temp[3];		/* Register value */
  	s8 temp_min[3];		/* Register value */
  	s8 temp_max[3];		/* Register value */
  	s8 temp_tmin[3];	/* Register value */
  	s8 temp_crit[3];	/* Register value */
  	s8 temp_offset[3];	/* Register value */
  	u8 fan[8];		/* Register value */
  	u8 fan_min[8];		/* Register value */
  	u8 fan_div[8];		/* Decoded value */
  	struct pwm_data pwm1;	/* Pwm control values */
  	u8 vrm;			/* VRM version */
  	u8 analog_out;		/* Register value (DAC) */
  	long alarms;		/* Register encoding, combined */
  	long alarm_mask;	/* Register encoding, combined */
  	long gpio;		/* Register encoding, combined */
  	long gpio_mask;		/* Register encoding, combined */
  	u8 gpio_config[17];	/* Decoded value */
  	u8 config1;		/* Register value */
  	u8 config2;		/* Register value */
  	u8 config3;		/* Register value */
  };
  
  static int adm1026_probe(struct i2c_client *client,
  			 const struct i2c_device_id *id);
  static int adm1026_detect(struct i2c_client *client,
  			  struct i2c_board_info *info);
  static int adm1026_remove(struct i2c_client *client);
  static int adm1026_read_value(struct i2c_client *client, u8 reg);
  static int adm1026_write_value(struct i2c_client *client, u8 reg, int value);
  static void adm1026_print_gpio(struct i2c_client *client);
  static void adm1026_fixup_gpio(struct i2c_client *client);
  static struct adm1026_data *adm1026_update_device(struct device *dev);
  static void adm1026_init_client(struct i2c_client *client);
  
  
  static const struct i2c_device_id adm1026_id[] = {
  	{ "adm1026", 0 },
  	{ }
  };
  MODULE_DEVICE_TABLE(i2c, adm1026_id);
  
  static struct i2c_driver adm1026_driver = {
  	.class		= I2C_CLASS_HWMON,
  	.driver = {
  		.name	= "adm1026",
  	},
  	.probe		= adm1026_probe,
  	.remove		= adm1026_remove,
  	.id_table	= adm1026_id,
  	.detect		= adm1026_detect,
  	.address_list	= normal_i2c,
  };
  
  static int adm1026_read_value(struct i2c_client *client, u8 reg)
  {
  	int res;
  
  	if (reg < 0x80) {
  		/* "RAM" locations */
  		res = i2c_smbus_read_byte_data(client, reg) & 0xff;
  	} else {
  		/* EEPROM, do nothing */
  		res = 0;
  	}
  	return res;
  }
  
  static int adm1026_write_value(struct i2c_client *client, u8 reg, int value)
  {
  	int res;
  
  	if (reg < 0x80) {
  		/* "RAM" locations */
  		res = i2c_smbus_write_byte_data(client, reg, value);
  	} else {
  		/* EEPROM, do nothing */
  		res = 0;
  	}
  	return res;
  }
  
  static void adm1026_init_client(struct i2c_client *client)
  {
  	int value, i;
  	struct adm1026_data *data = i2c_get_clientdata(client);
  
  	dev_dbg(&client->dev, "Initializing device\n");
  	/* Read chip config */
  	data->config1 = adm1026_read_value(client, ADM1026_REG_CONFIG1);
  	data->config2 = adm1026_read_value(client, ADM1026_REG_CONFIG2);
  	data->config3 = adm1026_read_value(client, ADM1026_REG_CONFIG3);
  
  	/* Inform user of chip config */
  	dev_dbg(&client->dev, "ADM1026_REG_CONFIG1 is: 0x%02x\n",
  		data->config1);
  	if ((data->config1 & CFG1_MONITOR) == 0) {
  		dev_dbg(&client->dev, "Monitoring not currently "
  			"enabled.\n");
  	}
  	if (data->config1 & CFG1_INT_ENABLE) {
  		dev_dbg(&client->dev, "SMBALERT interrupts are "
  			"enabled.\n");
  	}
  	if (data->config1 & CFG1_AIN8_9) {
  		dev_dbg(&client->dev, "in8 and in9 enabled. "
  			"temp3 disabled.\n");
  	} else {
  		dev_dbg(&client->dev, "temp3 enabled.  in8 and "
  			"in9 disabled.\n");
  	}
  	if (data->config1 & CFG1_THERM_HOT) {
  		dev_dbg(&client->dev, "Automatic THERM, PWM, "
  			"and temp limits enabled.\n");
  	}
  
  	if (data->config3 & CFG3_GPIO16_ENABLE) {
  		dev_dbg(&client->dev, "GPIO16 enabled.  THERM "
  			"pin disabled.\n");
  	} else {
  		dev_dbg(&client->dev, "THERM pin enabled.  "
  			"GPIO16 disabled.\n");
  	}
  	if (data->config3 & CFG3_VREF_250)
  		dev_dbg(&client->dev, "Vref is 2.50 Volts.\n");
  	else
  		dev_dbg(&client->dev, "Vref is 1.82 Volts.\n");
  	/* Read and pick apart the existing GPIO configuration */
  	value = 0;
  	for (i = 0; i <= 15; ++i) {
  		if ((i & 0x03) == 0) {
  			value = adm1026_read_value(client,
  					ADM1026_REG_GPIO_CFG_0_3 + i / 4);
  		}
  		data->gpio_config[i] = value & 0x03;
  		value >>= 2;
  	}
  	data->gpio_config[16] = (data->config3 >> 6) & 0x03;
  
  	/* ... and then print it */
  	adm1026_print_gpio(client);
  
  	/*
  	 * If the user asks us to reprogram the GPIO config, then
  	 * do it now.
  	 */
  	if (gpio_input[0] != -1 || gpio_output[0] != -1
  		|| gpio_inverted[0] != -1 || gpio_normal[0] != -1
  		|| gpio_fan[0] != -1) {
  		adm1026_fixup_gpio(client);
  	}
  
  	/*
  	 * WE INTENTIONALLY make no changes to the limits,
  	 *   offsets, pwms, fans and zones.  If they were
  	 *   configured, we don't want to mess with them.
  	 *   If they weren't, the default is 100% PWM, no
  	 *   control and will suffice until 'sensors -s'
  	 *   can be run by the user.  We DO set the default
  	 *   value for pwm1.auto_pwm_min to its maximum
  	 *   so that enabling automatic pwm fan control
  	 *   without first setting a value for pwm1.auto_pwm_min
  	 *   will not result in potentially dangerous fan speed decrease.
  	 */
  	data->pwm1.auto_pwm_min = 255;
  	/* Start monitoring */
  	value = adm1026_read_value(client, ADM1026_REG_CONFIG1);
  	/* Set MONITOR, clear interrupt acknowledge and s/w reset */
  	value = (value | CFG1_MONITOR) & (~CFG1_INT_CLEAR & ~CFG1_RESET);
  	dev_dbg(&client->dev, "Setting CONFIG to: 0x%02x\n", value);
  	data->config1 = value;
  	adm1026_write_value(client, ADM1026_REG_CONFIG1, value);
  
  	/* initialize fan_div[] to hardware defaults */
  	value = adm1026_read_value(client, ADM1026_REG_FAN_DIV_0_3) |
  		(adm1026_read_value(client, ADM1026_REG_FAN_DIV_4_7) << 8);
  	for (i = 0; i <= 7; ++i) {
  		data->fan_div[i] = DIV_FROM_REG(value & 0x03);
  		value >>= 2;
  	}
  }
  
  static void adm1026_print_gpio(struct i2c_client *client)
  {
  	struct adm1026_data *data = i2c_get_clientdata(client);
  	int i;
  
  	dev_dbg(&client->dev, "GPIO config is:\n");
  	for (i = 0; i <= 7; ++i) {
  		if (data->config2 & (1 << i)) {
  			dev_dbg(&client->dev, "\t%sGP%s%d\n",
  				data->gpio_config[i] & 0x02 ? "" : "!",
  				data->gpio_config[i] & 0x01 ? "OUT" : "IN",
  				i);
  		} else {
  			dev_dbg(&client->dev, "\tFAN%d\n", i);
  		}
  	}
  	for (i = 8; i <= 15; ++i) {
  		dev_dbg(&client->dev, "\t%sGP%s%d\n",
  			data->gpio_config[i] & 0x02 ? "" : "!",
  			data->gpio_config[i] & 0x01 ? "OUT" : "IN",
  			i);
  	}
  	if (data->config3 & CFG3_GPIO16_ENABLE) {
  		dev_dbg(&client->dev, "\t%sGP%s16\n",
  			data->gpio_config[16] & 0x02 ? "" : "!",
  			data->gpio_config[16] & 0x01 ? "OUT" : "IN");
  	} else {
  		/* GPIO16 is THERM */
  		dev_dbg(&client->dev, "\tTHERM\n");
  	}
  }
  
  static void adm1026_fixup_gpio(struct i2c_client *client)
  {
  	struct adm1026_data *data = i2c_get_clientdata(client);
  	int i;
  	int value;
  
  	/* Make the changes requested. */
  	/*
  	 * We may need to unlock/stop monitoring or soft-reset the
  	 *    chip before we can make changes.  This hasn't been
  	 *    tested much.  FIXME
  	 */
  
  	/* Make outputs */
  	for (i = 0; i <= 16; ++i) {
  		if (gpio_output[i] >= 0 && gpio_output[i] <= 16)
  			data->gpio_config[gpio_output[i]] |= 0x01;
  		/* if GPIO0-7 is output, it isn't a FAN tach */
  		if (gpio_output[i] >= 0 && gpio_output[i] <= 7)
  			data->config2 |= 1 << gpio_output[i];
  	}
  
  	/* Input overrides output */
  	for (i = 0; i <= 16; ++i) {
  		if (gpio_input[i] >= 0 && gpio_input[i] <= 16)
  			data->gpio_config[gpio_input[i]] &= ~0x01;
  		/* if GPIO0-7 is input, it isn't a FAN tach */
  		if (gpio_input[i] >= 0 && gpio_input[i] <= 7)
  			data->config2 |= 1 << gpio_input[i];
  	}
  
  	/* Inverted */
  	for (i = 0; i <= 16; ++i) {
  		if (gpio_inverted[i] >= 0 && gpio_inverted[i] <= 16)
  			data->gpio_config[gpio_inverted[i]] &= ~0x02;
  	}
  
  	/* Normal overrides inverted */
  	for (i = 0; i <= 16; ++i) {
  		if (gpio_normal[i] >= 0 && gpio_normal[i] <= 16)
  			data->gpio_config[gpio_normal[i]] |= 0x02;
  	}
  
  	/* Fan overrides input and output */
  	for (i = 0; i <= 7; ++i) {
  		if (gpio_fan[i] >= 0 && gpio_fan[i] <= 7)
  			data->config2 &= ~(1 << gpio_fan[i]);
  	}
  
  	/* Write new configs to registers */
  	adm1026_write_value(client, ADM1026_REG_CONFIG2, data->config2);
  	data->config3 = (data->config3 & 0x3f)
  			| ((data->gpio_config[16] & 0x03) << 6);
  	adm1026_write_value(client, ADM1026_REG_CONFIG3, data->config3);
  	for (i = 15, value = 0; i >= 0; --i) {
  		value <<= 2;
  		value |= data->gpio_config[i] & 0x03;
  		if ((i & 0x03) == 0) {
  			adm1026_write_value(client,
  					ADM1026_REG_GPIO_CFG_0_3 + i/4,
  					value);
  			value = 0;
  		}
  	}
  
  	/* Print the new config */
  	adm1026_print_gpio(client);
  }
  
  
  static struct adm1026_data *adm1026_update_device(struct device *dev)
  {
  	struct i2c_client *client = to_i2c_client(dev);
  	struct adm1026_data *data = i2c_get_clientdata(client);
  	int i;
  	long value, alarms, gpio;
  
  	mutex_lock(&data->update_lock);
  	if (!data->valid
  	    || time_after(jiffies,
  			  data->last_reading + ADM1026_DATA_INTERVAL)) {
  		/* Things that change quickly */
  		dev_dbg(&client->dev, "Reading sensor values\n");
  		for (i = 0; i <= 16; ++i) {
  			data->in[i] =
  			    adm1026_read_value(client, ADM1026_REG_IN[i]);
  		}
  
  		for (i = 0; i <= 7; ++i) {
  			data->fan[i] =
  			    adm1026_read_value(client, ADM1026_REG_FAN(i));
  		}
  
  		for (i = 0; i <= 2; ++i) {
  			/*
  			 * NOTE: temp[] is s8 and we assume 2's complement
  			 *   "conversion" in the assignment
  			 */
  			data->temp[i] =
  			    adm1026_read_value(client, ADM1026_REG_TEMP[i]);
  		}
  
  		data->pwm1.pwm = adm1026_read_value(client,
  			ADM1026_REG_PWM);
  		data->analog_out = adm1026_read_value(client,
  			ADM1026_REG_DAC);
  		/* GPIO16 is MSbit of alarms, move it to gpio */
  		alarms = adm1026_read_value(client, ADM1026_REG_STATUS4);
  		gpio = alarms & 0x80 ? 0x0100 : 0; /* GPIO16 */
  		alarms &= 0x7f;
  		alarms <<= 8;
  		alarms |= adm1026_read_value(client, ADM1026_REG_STATUS3);
  		alarms <<= 8;
  		alarms |= adm1026_read_value(client, ADM1026_REG_STATUS2);
  		alarms <<= 8;
  		alarms |= adm1026_read_value(client, ADM1026_REG_STATUS1);
  		data->alarms = alarms;
  
  		/* Read the GPIO values */
  		gpio |= adm1026_read_value(client,
  			ADM1026_REG_GPIO_STATUS_8_15);
  		gpio <<= 8;
  		gpio |= adm1026_read_value(client,
  			ADM1026_REG_GPIO_STATUS_0_7);
  		data->gpio = gpio;
  
  		data->last_reading = jiffies;
  	}; /* last_reading */
  
  	if (!data->valid ||
  	    time_after(jiffies, data->last_config + ADM1026_CONFIG_INTERVAL)) {
  		/* Things that don't change often */
  		dev_dbg(&client->dev, "Reading config values\n");
  		for (i = 0; i <= 16; ++i) {
  			data->in_min[i] = adm1026_read_value(client,
  				ADM1026_REG_IN_MIN[i]);
  			data->in_max[i] = adm1026_read_value(client,
  				ADM1026_REG_IN_MAX[i]);
  		}
  
  		value = adm1026_read_value(client, ADM1026_REG_FAN_DIV_0_3)
  			| (adm1026_read_value(client, ADM1026_REG_FAN_DIV_4_7)
  			<< 8);
  		for (i = 0; i <= 7; ++i) {
  			data->fan_min[i] = adm1026_read_value(client,
  				ADM1026_REG_FAN_MIN(i));
  			data->fan_div[i] = DIV_FROM_REG(value & 0x03);
  			value >>= 2;
  		}
  
  		for (i = 0; i <= 2; ++i) {
  			/*
  			 * NOTE: temp_xxx[] are s8 and we assume 2's
  			 *    complement "conversion" in the assignment
  			 */
  			data->temp_min[i] = adm1026_read_value(client,
  				ADM1026_REG_TEMP_MIN[i]);
  			data->temp_max[i] = adm1026_read_value(client,
  				ADM1026_REG_TEMP_MAX[i]);
  			data->temp_tmin[i] = adm1026_read_value(client,
  				ADM1026_REG_TEMP_TMIN[i]);
  			data->temp_crit[i] = adm1026_read_value(client,
  				ADM1026_REG_TEMP_THERM[i]);
  			data->temp_offset[i] = adm1026_read_value(client,
  				ADM1026_REG_TEMP_OFFSET[i]);
  		}
  
  		/* Read the STATUS/alarm masks */
  		alarms = adm1026_read_value(client, ADM1026_REG_MASK4);
  		gpio = alarms & 0x80 ? 0x0100 : 0; /* GPIO16 */
  		alarms = (alarms & 0x7f) << 8;
  		alarms |= adm1026_read_value(client, ADM1026_REG_MASK3);
  		alarms <<= 8;
  		alarms |= adm1026_read_value(client, ADM1026_REG_MASK2);
  		alarms <<= 8;
  		alarms |= adm1026_read_value(client, ADM1026_REG_MASK1);
  		data->alarm_mask = alarms;
  
  		/* Read the GPIO values */
  		gpio |= adm1026_read_value(client,
  			ADM1026_REG_GPIO_MASK_8_15);
  		gpio <<= 8;
  		gpio |= adm1026_read_value(client, ADM1026_REG_GPIO_MASK_0_7);
  		data->gpio_mask = gpio;
  
  		/* Read various values from CONFIG1 */
  		data->config1 = adm1026_read_value(client,
  			ADM1026_REG_CONFIG1);
  		if (data->config1 & CFG1_PWM_AFC) {
  			data->pwm1.enable = 2;
  			data->pwm1.auto_pwm_min =
  				PWM_MIN_FROM_REG(data->pwm1.pwm);
  		}
  		/* Read the GPIO config */
  		data->config2 = adm1026_read_value(client,
  			ADM1026_REG_CONFIG2);
  		data->config3 = adm1026_read_value(client,
  			ADM1026_REG_CONFIG3);
  		data->gpio_config[16] = (data->config3 >> 6) & 0x03;
  
  		value = 0;
  		for (i = 0; i <= 15; ++i) {
  			if ((i & 0x03) == 0) {
  				value = adm1026_read_value(client,
  					    ADM1026_REG_GPIO_CFG_0_3 + i/4);
  			}
  			data->gpio_config[i] = value & 0x03;
  			value >>= 2;
  		}
  
  		data->last_config = jiffies;
  	}; /* last_config */
  
  	data->valid = 1;
  	mutex_unlock(&data->update_lock);
  	return data;
  }
  
  static ssize_t show_in(struct device *dev, struct device_attribute *attr,
  		char *buf)
  {
  	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
  	int nr = sensor_attr->index;
  	struct adm1026_data *data = adm1026_update_device(dev);
  	return sprintf(buf, "%d\n", INS_FROM_REG(nr, data->in[nr]));
  }
  static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
  		char *buf)
  {
  	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
  	int nr = sensor_attr->index;
  	struct adm1026_data *data = adm1026_update_device(dev);
  	return sprintf(buf, "%d\n", INS_FROM_REG(nr, data->in_min[nr]));
  }
  static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
  		const char *buf, size_t count)
  {
  	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
  	int nr = sensor_attr->index;
  	struct i2c_client *client = to_i2c_client(dev);
  	struct adm1026_data *data = i2c_get_clientdata(client);
  	long val;
  	int err;
  
  	err = kstrtol(buf, 10, &val);
  	if (err)
  		return err;
  
  	mutex_lock(&data->update_lock);
  	data->in_min[nr] = INS_TO_REG(nr, val);
  	adm1026_write_value(client, ADM1026_REG_IN_MIN[nr], data->in_min[nr]);
  	mutex_unlock(&data->update_lock);
  	return count;
  }
  static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
  		char *buf)
  {
  	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
  	int nr = sensor_attr->index;
  	struct adm1026_data *data = adm1026_update_device(dev);
  	return sprintf(buf, "%d\n", INS_FROM_REG(nr, data->in_max[nr]));
  }
  static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
  		const char *buf, size_t count)
  {
  	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
  	int nr = sensor_attr->index;
  	struct i2c_client *client = to_i2c_client(dev);
  	struct adm1026_data *data = i2c_get_clientdata(client);
  	long val;
  	int err;
  
  	err = kstrtol(buf, 10, &val);
  	if (err)
  		return err;
  
  	mutex_lock(&data->update_lock);
  	data->in_max[nr] = INS_TO_REG(nr, val);
  	adm1026_write_value(client, ADM1026_REG_IN_MAX[nr], data->in_max[nr]);
  	mutex_unlock(&data->update_lock);
  	return count;
  }
  
  #define in_reg(offset)						\
  static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, show_in,	\
  		NULL, offset);					\
  static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR,	\
  		show_in_min, set_in_min, offset);		\
  static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR,	\
  		show_in_max, set_in_max, offset);
  
  
  in_reg(0);
  in_reg(1);
  in_reg(2);
  in_reg(3);
  in_reg(4);
  in_reg(5);
  in_reg(6);
  in_reg(7);
  in_reg(8);
  in_reg(9);
  in_reg(10);
  in_reg(11);
  in_reg(12);
  in_reg(13);
  in_reg(14);
  in_reg(15);
  
  static ssize_t show_in16(struct device *dev, struct device_attribute *attr,
  			 char *buf)
  {
  	struct adm1026_data *data = adm1026_update_device(dev);
  	return sprintf(buf, "%d\n", INS_FROM_REG(16, data->in[16]) -
  		NEG12_OFFSET);
  }
  static ssize_t show_in16_min(struct device *dev, struct device_attribute *attr,
  			     char *buf)
  {
  	struct adm1026_data *data = adm1026_update_device(dev);
  	return sprintf(buf, "%d\n", INS_FROM_REG(16, data->in_min[16])
  		- NEG12_OFFSET);
  }
  static ssize_t set_in16_min(struct device *dev, struct device_attribute *attr,
  			    const char *buf, size_t count)
  {
  	struct i2c_client *client = to_i2c_client(dev);
  	struct adm1026_data *data = i2c_get_clientdata(client);
  	long val;
  	int err;
  
  	err = kstrtol(buf, 10, &val);
  	if (err)
  		return err;
  
  	mutex_lock(&data->update_lock);
  	data->in_min[16] = INS_TO_REG(16, val + NEG12_OFFSET);
  	adm1026_write_value(client, ADM1026_REG_IN_MIN[16], data->in_min[16]);
  	mutex_unlock(&data->update_lock);
  	return count;
  }
  static ssize_t show_in16_max(struct device *dev, struct device_attribute *attr,
  			     char *buf)
  {
  	struct adm1026_data *data = adm1026_update_device(dev);
  	return sprintf(buf, "%d\n", INS_FROM_REG(16, data->in_max[16])
  			- NEG12_OFFSET);
  }
  static ssize_t set_in16_max(struct device *dev, struct device_attribute *attr,
  			    const char *buf, size_t count)
  {
  	struct i2c_client *client = to_i2c_client(dev);
  	struct adm1026_data *data = i2c_get_clientdata(client);
  	long val;
  	int err;
  
  	err = kstrtol(buf, 10, &val);
  	if (err)
  		return err;
  
  	mutex_lock(&data->update_lock);
  	data->in_max[16] = INS_TO_REG(16, val+NEG12_OFFSET);
  	adm1026_write_value(client, ADM1026_REG_IN_MAX[16], data->in_max[16]);
  	mutex_unlock(&data->update_lock);
  	return count;
  }
  
  static SENSOR_DEVICE_ATTR(in16_input, S_IRUGO, show_in16, NULL, 16);
  static SENSOR_DEVICE_ATTR(in16_min, S_IRUGO | S_IWUSR, show_in16_min,
  			  set_in16_min, 16);
  static SENSOR_DEVICE_ATTR(in16_max, S_IRUGO | S_IWUSR, show_in16_max,
  			  set_in16_max, 16);
  
  
  /* Now add fan read/write functions */
  
  static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
  		char *buf)
  {
  	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
  	int nr = sensor_attr->index;
  	struct adm1026_data *data = adm1026_update_device(dev);
  	return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
  		data->fan_div[nr]));
  }
  static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
  		char *buf)
  {
  	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
  	int nr = sensor_attr->index;
  	struct adm1026_data *data = adm1026_update_device(dev);
  	return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
  		data->fan_div[nr]));
  }
  static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
  		const char *buf, size_t count)
  {
  	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
  	int nr = sensor_attr->index;
  	struct i2c_client *client = to_i2c_client(dev);
  	struct adm1026_data *data = i2c_get_clientdata(client);
  	long val;
  	int err;
  
  	err = kstrtol(buf, 10, &val);
  	if (err)
  		return err;
  
  	mutex_lock(&data->update_lock);
  	data->fan_min[nr] = FAN_TO_REG(val, data->fan_div[nr]);
  	adm1026_write_value(client, ADM1026_REG_FAN_MIN(nr),
  		data->fan_min[nr]);
  	mutex_unlock(&data->update_lock);
  	return count;
  }
  
  #define fan_offset(offset)						\
  static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, show_fan, NULL,	\
  		offset - 1);						\
  static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR,		\
  		show_fan_min, set_fan_min, offset - 1);
  
  fan_offset(1);
  fan_offset(2);
  fan_offset(3);
  fan_offset(4);
  fan_offset(5);
  fan_offset(6);
  fan_offset(7);
  fan_offset(8);
  
  /* Adjust fan_min to account for new fan divisor */
  static void fixup_fan_min(struct device *dev, int fan, int old_div)
  {
  	struct i2c_client *client = to_i2c_client(dev);
  	struct adm1026_data *data = i2c_get_clientdata(client);
  	int new_min;
  	int new_div = data->fan_div[fan];
  
  	/* 0 and 0xff are special.  Don't adjust them */
  	if (data->fan_min[fan] == 0 || data->fan_min[fan] == 0xff)
  		return;
  
  	new_min = data->fan_min[fan] * old_div / new_div;
  	new_min = SENSORS_LIMIT(new_min, 1, 254);
  	data->fan_min[fan] = new_min;
  	adm1026_write_value(client, ADM1026_REG_FAN_MIN(fan), new_min);
  }
  
  /* Now add fan_div read/write functions */
  static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
  		char *buf)
  {
  	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
  	int nr = sensor_attr->index;
  	struct adm1026_data *data = adm1026_update_device(dev);
  	return sprintf(buf, "%d\n", data->fan_div[nr]);
  }
  static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
  		const char *buf, size_t count)
  {
  	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
  	int nr = sensor_attr->index;
  	struct i2c_client *client = to_i2c_client(dev);
  	struct adm1026_data *data = i2c_get_clientdata(client);
  	long val;
  	int orig_div, new_div;
  	int err;
  
  	err = kstrtol(buf, 10, &val);
  	if (err)
  		return err;
  
  	new_div = DIV_TO_REG(val);
  
  	mutex_lock(&data->update_lock);
  	orig_div = data->fan_div[nr];
  	data->fan_div[nr] = DIV_FROM_REG(new_div);
  
  	if (nr < 4) { /* 0 <= nr < 4 */
  		adm1026_write_value(client, ADM1026_REG_FAN_DIV_0_3,
  				    (DIV_TO_REG(data->fan_div[0]) << 0) |
  				    (DIV_TO_REG(data->fan_div[1]) << 2) |
  				    (DIV_TO_REG(data->fan_div[2]) << 4) |
  				    (DIV_TO_REG(data->fan_div[3]) << 6));
  	} else { /* 3 < nr < 8 */
  		adm1026_write_value(client, ADM1026_REG_FAN_DIV_4_7,
  				    (DIV_TO_REG(data->fan_div[4]) << 0) |
  				    (DIV_TO_REG(data->fan_div[5]) << 2) |
  				    (DIV_TO_REG(data->fan_div[6]) << 4) |
  				    (DIV_TO_REG(data->fan_div[7]) << 6));
  	}
  
  	if (data->fan_div[nr] != orig_div)
  		fixup_fan_min(dev, nr, orig_div);
  
  	mutex_unlock(&data->update_lock);
  	return count;
  }
  
  #define fan_offset_div(offset)						\
  static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR,		\
  		show_fan_div, set_fan_div, offset - 1);
  
  fan_offset_div(1);
  fan_offset_div(2);
  fan_offset_div(3);
  fan_offset_div(4);
  fan_offset_div(5);
  fan_offset_div(6);
  fan_offset_div(7);
  fan_offset_div(8);
  
  /* Temps */
  static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
  		char *buf)
  {
  	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
  	int nr = sensor_attr->index;
  	struct adm1026_data *data = adm1026_update_device(dev);
  	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
  }
  static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
  		char *buf)
  {
  	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
  	int nr = sensor_attr->index;
  	struct adm1026_data *data = adm1026_update_device(dev);
  	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr]));
  }
  static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
  		const char *buf, size_t count)
  {
  	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
  	int nr = sensor_attr->index;
  	struct i2c_client *client = to_i2c_client(dev);
  	struct adm1026_data *data = i2c_get_clientdata(client);
  	long val;
  	int err;
  
  	err = kstrtol(buf, 10, &val);
  	if (err)
  		return err;
  
  	mutex_lock(&data->update_lock);
  	data->temp_min[nr] = TEMP_TO_REG(val);
  	adm1026_write_value(client, ADM1026_REG_TEMP_MIN[nr],
  		data->temp_min[nr]);
  	mutex_unlock(&data->update_lock);
  	return count;
  }
  static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
  		char *buf)
  {
  	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
  	int nr = sensor_attr->index;
  	struct adm1026_data *data = adm1026_update_device(dev);
  	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr]));
  }
  static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
  		const char *buf, size_t count)
  {
  	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
  	int nr = sensor_attr->index;
  	struct i2c_client *client = to_i2c_client(dev);
  	struct adm1026_data *data = i2c_get_clientdata(client);
  	long val;
  	int err;
  
  	err = kstrtol(buf, 10, &val);
  	if (err)
  		return err;
  
  	mutex_lock(&data->update_lock);
  	data->temp_max[nr] = TEMP_TO_REG(val);
  	adm1026_write_value(client, ADM1026_REG_TEMP_MAX[nr],
  		data->temp_max[nr]);
  	mutex_unlock(&data->update_lock);
  	return count;
  }
  
  #define temp_reg(offset)						\
  static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp,	\
  		NULL, offset - 1);					\
  static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR,	\
  		show_temp_min, set_temp_min, offset - 1);		\
  static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR,	\
  		show_temp_max, set_temp_max, offset - 1);
  
  
  temp_reg(1);
  temp_reg(2);
  temp_reg(3);
  
  static ssize_t show_temp_offset(struct device *dev,
  		struct device_attribute *attr, char *buf)
  {
  	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
  	int nr = sensor_attr->index;
  	struct adm1026_data *data = adm1026_update_device(dev);
  	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_offset[nr]));
  }
  static ssize_t set_temp_offset(struct device *dev,
  		struct device_attribute *attr, const char *buf,
  		size_t count)
  {
  	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
  	int nr = sensor_attr->index;
  	struct i2c_client *client = to_i2c_client(dev);
  	struct adm1026_data *data = i2c_get_clientdata(client);
  	long val;
  	int err;
  
  	err = kstrtol(buf, 10, &val);
  	if (err)
  		return err;
  
  	mutex_lock(&data->update_lock);
  	data->temp_offset[nr] = TEMP_TO_REG(val);
  	adm1026_write_value(client, ADM1026_REG_TEMP_OFFSET[nr],
  		data->temp_offset[nr]);
  	mutex_unlock(&data->update_lock);
  	return count;
  }
  
  #define temp_offset_reg(offset)						\
  static SENSOR_DEVICE_ATTR(temp##offset##_offset, S_IRUGO | S_IWUSR,	\
  		show_temp_offset, set_temp_offset, offset - 1);
  
  temp_offset_reg(1);
  temp_offset_reg(2);
  temp_offset_reg(3);
  
  static ssize_t show_temp_auto_point1_temp_hyst(struct device *dev,
  		struct device_attribute *attr, char *buf)
  {
  	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
  	int nr = sensor_attr->index;
  	struct adm1026_data *data = adm1026_update_device(dev);
  	return sprintf(buf, "%d\n", TEMP_FROM_REG(
  		ADM1026_FAN_ACTIVATION_TEMP_HYST + data->temp_tmin[nr]));
  }
  static ssize_t show_temp_auto_point2_temp(struct device *dev,
  		struct device_attribute *attr, char *buf)
  {
  	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
  	int nr = sensor_attr->index;
  	struct adm1026_data *data = adm1026_update_device(dev);
  	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_tmin[nr] +
  		ADM1026_FAN_CONTROL_TEMP_RANGE));
  }
  static ssize_t show_temp_auto_point1_temp(struct device *dev,
  		struct device_attribute *attr, char *buf)
  {
  	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
  	int nr = sensor_attr->index;
  	struct adm1026_data *data = adm1026_update_device(dev);
  	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_tmin[nr]));
  }
  static ssize_t set_temp_auto_point1_temp(struct device *dev,
  		struct device_attribute *attr, const char *buf, size_t count)
  {
  	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
  	int nr = sensor_attr->index;
  	struct i2c_client *client = to_i2c_client(dev);
  	struct adm1026_data *data = i2c_get_clientdata(client);
  	long val;
  	int err;
  
  	err = kstrtol(buf, 10, &val);
  	if (err)
  		return err;
  
  	mutex_lock(&data->update_lock);
  	data->temp_tmin[nr] = TEMP_TO_REG(val);
  	adm1026_write_value(client, ADM1026_REG_TEMP_TMIN[nr],
  		data->temp_tmin[nr]);
  	mutex_unlock(&data->update_lock);
  	return count;
  }
  
  #define temp_auto_point(offset)						\
  static SENSOR_DEVICE_ATTR(temp##offset##_auto_point1_temp,		\
  		S_IRUGO | S_IWUSR, show_temp_auto_point1_temp,		\
  		set_temp_auto_point1_temp, offset - 1);			\
  static SENSOR_DEVICE_ATTR(temp##offset##_auto_point1_temp_hyst, S_IRUGO,\
  		show_temp_auto_point1_temp_hyst, NULL, offset - 1);	\
  static SENSOR_DEVICE_ATTR(temp##offset##_auto_point2_temp, S_IRUGO,	\
  		show_temp_auto_point2_temp, NULL, offset - 1);
  
  temp_auto_point(1);
  temp_auto_point(2);
  temp_auto_point(3);
  
  static ssize_t show_temp_crit_enable(struct device *dev,
  		struct device_attribute *attr, char *buf)
  {
  	struct adm1026_data *data = adm1026_update_device(dev);
  	return sprintf(buf, "%d\n", (data->config1 & CFG1_THERM_HOT) >> 4);
  }
  static ssize_t set_temp_crit_enable(struct device *dev,
  		struct device_attribute *attr, const char *buf, size_t count)
  {
  	struct i2c_client *client = to_i2c_client(dev);
  	struct adm1026_data *data = i2c_get_clientdata(client);
  	unsigned long val;
  	int err;
  
  	err = kstrtoul(buf, 10, &val);
  	if (err)
  		return err;
  
  	if (val > 1)
  		return -EINVAL;
  
  	mutex_lock(&data->update_lock);
  	data->config1 = (data->config1 & ~CFG1_THERM_HOT) | (val << 4);
  	adm1026_write_value(client, ADM1026_REG_CONFIG1, data->config1);
  	mutex_unlock(&data->update_lock);
  
  	return count;
  }
  
  #define temp_crit_enable(offset)				\
  static DEVICE_ATTR(temp##offset##_crit_enable, S_IRUGO | S_IWUSR, \
  	show_temp_crit_enable, set_temp_crit_enable);
  
  temp_crit_enable(1);
  temp_crit_enable(2);
  temp_crit_enable(3);
  
  static ssize_t show_temp_crit(struct device *dev,
  		struct device_attribute *attr, char *buf)
  {
  	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
  	int nr = sensor_attr->index;
  	struct adm1026_data *data = adm1026_update_device(dev);
  	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit[nr]));
  }
  static ssize_t set_temp_crit(struct device *dev, struct device_attribute *attr,
  		const char *buf, size_t count)
  {
  	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
  	int nr = sensor_attr->index;
  	struct i2c_client *client = to_i2c_client(dev);
  	struct adm1026_data *data = i2c_get_clientdata(client);
  	long val;
  	int err;
  
  	err = kstrtol(buf, 10, &val);
  	if (err)
  		return err;
  
  	mutex_lock(&data->update_lock);
  	data->temp_crit[nr] = TEMP_TO_REG(val);
  	adm1026_write_value(client, ADM1026_REG_TEMP_THERM[nr],
  		data->temp_crit[nr]);
  	mutex_unlock(&data->update_lock);
  	return count;
  }
  
  #define temp_crit_reg(offset)						\
  static SENSOR_DEVICE_ATTR(temp##offset##_crit, S_IRUGO | S_IWUSR,	\
  		show_temp_crit, set_temp_crit, offset - 1);
  
  temp_crit_reg(1);
  temp_crit_reg(2);
  temp_crit_reg(3);
  
  static ssize_t show_analog_out_reg(struct device *dev,
  				   struct device_attribute *attr, char *buf)
  {
  	struct adm1026_data *data = adm1026_update_device(dev);
  	return sprintf(buf, "%d\n", DAC_FROM_REG(data->analog_out));
  }
  static ssize_t set_analog_out_reg(struct device *dev,
  				  struct device_attribute *attr,
  				  const char *buf, size_t count)
  {
  	struct i2c_client *client = to_i2c_client(dev);
  	struct adm1026_data *data = i2c_get_clientdata(client);
  	long val;
  	int err;
  
  	err = kstrtol(buf, 10, &val);
  	if (err)
  		return err;
  
  	mutex_lock(&data->update_lock);
  	data->analog_out = DAC_TO_REG(val);
  	adm1026_write_value(client, ADM1026_REG_DAC, data->analog_out);
  	mutex_unlock(&data->update_lock);
  	return count;
  }
  
  static DEVICE_ATTR(analog_out, S_IRUGO | S_IWUSR, show_analog_out_reg,
  	set_analog_out_reg);
  
  static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
  			    char *buf)
  {
  	struct adm1026_data *data = adm1026_update_device(dev);
  	int vid = (data->gpio >> 11) & 0x1f;
  
  	dev_dbg(dev, "Setting VID from GPIO11-15.\n");
  	return sprintf(buf, "%d\n", vid_from_reg(vid, data->vrm));
  }
  
  static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
  
  static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
  			    char *buf)
  {
  	struct adm1026_data *data = dev_get_drvdata(dev);
  	return sprintf(buf, "%d\n", data->vrm);
  }
  
  static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
  			     const char *buf, size_t count)
  {
  	struct adm1026_data *data = dev_get_drvdata(dev);
  	unsigned long val;
  	int err;
  
  	err = kstrtoul(buf, 10, &val);
  	if (err)
  		return err;
  
  	data->vrm = val;
  	return count;
  }
  
  static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
  
  static ssize_t show_alarms_reg(struct device *dev,
  			       struct device_attribute *attr, char *buf)
  {
  	struct adm1026_data *data = adm1026_update_device(dev);
  	return sprintf(buf, "%ld\n", data->alarms);
  }
  
  static DEVICE_ATTR(alarms, S_IRUGO, show_alarms_reg, NULL);
  
  static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
  			  char *buf)
  {
  	struct adm1026_data *data = adm1026_update_device(dev);
  	int bitnr = to_sensor_dev_attr(attr)->index;
  	return sprintf(buf, "%ld\n", (data->alarms >> bitnr) & 1);
  }
  
  static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 0);
  static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 1);
  static SENSOR_DEVICE_ATTR(in9_alarm, S_IRUGO, show_alarm, NULL, 1);
  static SENSOR_DEVICE_ATTR(in11_alarm, S_IRUGO, show_alarm, NULL, 2);
  static SENSOR_DEVICE_ATTR(in12_alarm, S_IRUGO, show_alarm, NULL, 3);
  static SENSOR_DEVICE_ATTR(in13_alarm, S_IRUGO, show_alarm, NULL, 4);
  static SENSOR_DEVICE_ATTR(in14_alarm, S_IRUGO, show_alarm, NULL, 5);
  static SENSOR_DEVICE_ATTR(in15_alarm, S_IRUGO, show_alarm, NULL, 6);
  static SENSOR_DEVICE_ATTR(in16_alarm, S_IRUGO, show_alarm, NULL, 7);
  static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8);
  static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9);
  static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10);
  static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11);
  static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12);
  static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13);
  static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14);
  static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15);
  static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 16);
  static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 17);
  static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 18);
  static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 19);
  static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 20);
  static SENSOR_DEVICE_ATTR(fan6_alarm, S_IRUGO, show_alarm, NULL, 21);
  static SENSOR_DEVICE_ATTR(fan7_alarm, S_IRUGO, show_alarm, NULL, 22);
  static SENSOR_DEVICE_ATTR(fan8_alarm, S_IRUGO, show_alarm, NULL, 23);
  static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 24);
  static SENSOR_DEVICE_ATTR(in10_alarm, S_IRUGO, show_alarm, NULL, 25);
  static SENSOR_DEVICE_ATTR(in8_alarm, S_IRUGO, show_alarm, NULL, 26);
  
  static ssize_t show_alarm_mask(struct device *dev,
  			       struct device_attribute *attr, char *buf)
  {
  	struct adm1026_data *data = adm1026_update_device(dev);
  	return sprintf(buf, "%ld\n", data->alarm_mask);
  }
  static ssize_t set_alarm_mask(struct device *dev, struct device_attribute *attr,
  			      const char *buf, size_t count)
  {
  	struct i2c_client *client = to_i2c_client(dev);
  	struct adm1026_data *data = i2c_get_clientdata(client);
  	unsigned long mask;
  	long val;
  	int err;
  
  	err = kstrtol(buf, 10, &val);
  	if (err)
  		return err;
  
  	mutex_lock(&data->update_lock);
  	data->alarm_mask = val & 0x7fffffff;
  	mask = data->alarm_mask
  		| (data->gpio_mask & 0x10000 ? 0x80000000 : 0);
  	adm1026_write_value(client, ADM1026_REG_MASK1,
  		mask & 0xff);
  	mask >>= 8;
  	adm1026_write_value(client, ADM1026_REG_MASK2,
  		mask & 0xff);
  	mask >>= 8;
  	adm1026_write_value(client, ADM1026_REG_MASK3,
  		mask & 0xff);
  	mask >>= 8;
  	adm1026_write_value(client, ADM1026_REG_MASK4,
  		mask & 0xff);
  	mutex_unlock(&data->update_lock);
  	return count;
  }
  
  static DEVICE_ATTR(alarm_mask, S_IRUGO | S_IWUSR, show_alarm_mask,
  	set_alarm_mask);
  
  
  static ssize_t show_gpio(struct device *dev, struct device_attribute *attr,
  			 char *buf)
  {
  	struct adm1026_data *data = adm1026_update_device(dev);
  	return sprintf(buf, "%ld\n", data->gpio);
  }
  static ssize_t set_gpio(struct device *dev, struct device_attribute *attr,
  			const char *buf, size_t count)
  {
  	struct i2c_client *client = to_i2c_client(dev);
  	struct adm1026_data *data = i2c_get_clientdata(client);
  	long gpio;
  	long val;
  	int err;
  
  	err = kstrtol(buf, 10, &val);
  	if (err)
  		return err;
  
  	mutex_lock(&data->update_lock);
  	data->gpio = val & 0x1ffff;
  	gpio = data->gpio;
  	adm1026_write_value(client, ADM1026_REG_GPIO_STATUS_0_7, gpio & 0xff);
  	gpio >>= 8;
  	adm1026_write_value(client, ADM1026_REG_GPIO_STATUS_8_15, gpio & 0xff);
  	gpio = ((gpio >> 1) & 0x80) | (data->alarms >> 24 & 0x7f);
  	adm1026_write_value(client, ADM1026_REG_STATUS4, gpio & 0xff);
  	mutex_unlock(&data->update_lock);
  	return count;
  }
  
  static DEVICE_ATTR(gpio, S_IRUGO | S_IWUSR, show_gpio, set_gpio);
  
  static ssize_t show_gpio_mask(struct device *dev, struct device_attribute *attr,
  			      char *buf)
  {
  	struct adm1026_data *data = adm1026_update_device(dev);
  	return sprintf(buf, "%ld\n", data->gpio_mask);
  }
  static ssize_t set_gpio_mask(struct device *dev, struct device_attribute *attr,
  			     const char *buf, size_t count)
  {
  	struct i2c_client *client = to_i2c_client(dev);
  	struct adm1026_data *data = i2c_get_clientdata(client);
  	long mask;
  	long val;
  	int err;
  
  	err = kstrtol(buf, 10, &val);
  	if (err)
  		return err;
  
  	mutex_lock(&data->update_lock);
  	data->gpio_mask = val & 0x1ffff;
  	mask = data->gpio_mask;
  	adm1026_write_value(client, ADM1026_REG_GPIO_MASK_0_7, mask & 0xff);
  	mask >>= 8;
  	adm1026_write_value(client, ADM1026_REG_GPIO_MASK_8_15, mask & 0xff);
  	mask = ((mask >> 1) & 0x80) | (data->alarm_mask >> 24 & 0x7f);
  	adm1026_write_value(client, ADM1026_REG_MASK1, mask & 0xff);
  	mutex_unlock(&data->update_lock);
  	return count;
  }
  
  static DEVICE_ATTR(gpio_mask, S_IRUGO | S_IWUSR, show_gpio_mask, set_gpio_mask);
  
  static ssize_t show_pwm_reg(struct device *dev, struct device_attribute *attr,
  			    char *buf)
  {
  	struct adm1026_data *data = adm1026_update_device(dev);
  	return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm1.pwm));
  }
  
  static ssize_t set_pwm_reg(struct device *dev, struct device_attribute *attr,
  			   const char *buf, size_t count)
  {
  	struct i2c_client *client = to_i2c_client(dev);
  	struct adm1026_data *data = i2c_get_clientdata(client);
  
  	if (data->pwm1.enable == 1) {
  		long val;
  		int err;
  
  		err = kstrtol(buf, 10, &val);
  		if (err)
  			return err;
  
  		mutex_lock(&data->update_lock);
  		data->pwm1.pwm = PWM_TO_REG(val);
  		adm1026_write_value(client, ADM1026_REG_PWM, data->pwm1.pwm);
  		mutex_unlock(&data->update_lock);
  	}
  	return count;
  }
  
  static ssize_t show_auto_pwm_min(struct device *dev,
  				 struct device_attribute *attr, char *buf)
  {
  	struct adm1026_data *data = adm1026_update_device(dev);
  	return sprintf(buf, "%d\n", data->pwm1.auto_pwm_min);
  }
  
  static ssize_t set_auto_pwm_min(struct device *dev,
  				struct device_attribute *attr, const char *buf,
  				size_t count)
  {
  	struct i2c_client *client = to_i2c_client(dev);
  	struct adm1026_data *data = i2c_get_clientdata(client);
  	unsigned long val;
  	int err;
  
  	err = kstrtoul(buf, 10, &val);
  	if (err)
  		return err;
  
  	mutex_lock(&data->update_lock);
  	data->pwm1.auto_pwm_min = SENSORS_LIMIT(val, 0, 255);
  	if (data->pwm1.enable == 2) { /* apply immediately */
  		data->pwm1.pwm = PWM_TO_REG((data->pwm1.pwm & 0x0f) |
  			PWM_MIN_TO_REG(data->pwm1.auto_pwm_min));
  		adm1026_write_value(client, ADM1026_REG_PWM, data->pwm1.pwm);
  	}
  	mutex_unlock(&data->update_lock);
  	return count;
  }
  
  static ssize_t show_auto_pwm_max(struct device *dev,
  				 struct device_attribute *attr, char *buf)
  {
  	return sprintf(buf, "%d\n", ADM1026_PWM_MAX);
  }
  
  static ssize_t show_pwm_enable(struct device *dev,
  			       struct device_attribute *attr, char *buf)
  {
  	struct adm1026_data *data = adm1026_update_device(dev);
  	return sprintf(buf, "%d\n", data->pwm1.enable);
  }
  
  static ssize_t set_pwm_enable(struct device *dev, struct device_attribute *attr,
  			      const char *buf, size_t count)
  {
  	struct i2c_client *client = to_i2c_client(dev);
  	struct adm1026_data *data = i2c_get_clientdata(client);
  	int old_enable;
  	unsigned long val;
  	int err;
  
  	err = kstrtoul(buf, 10, &val);
  	if (err)
  		return err;
  
  	if (val >= 3)
  		return -EINVAL;
  
  	mutex_lock(&data->update_lock);
  	old_enable = data->pwm1.enable;
  	data->pwm1.enable = val;
  	data->config1 = (data->config1 & ~CFG1_PWM_AFC)
  			| ((val == 2) ? CFG1_PWM_AFC : 0);
  	adm1026_write_value(client, ADM1026_REG_CONFIG1, data->config1);
  	if (val == 2) { /* apply pwm1_auto_pwm_min to pwm1 */
  		data->pwm1.pwm = PWM_TO_REG((data->pwm1.pwm & 0x0f) |
  			PWM_MIN_TO_REG(data->pwm1.auto_pwm_min));
  		adm1026_write_value(client, ADM1026_REG_PWM, data->pwm1.pwm);
  	} else if (!((old_enable == 1) && (val == 1))) {
  		/* set pwm to safe value */
  		data->pwm1.pwm = 255;
  		adm1026_write_value(client, ADM1026_REG_PWM, data->pwm1.pwm);
  	}
  	mutex_unlock(&data->update_lock);
  
  	return count;
  }
  
  /* enable PWM fan control */
  static DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm_reg, set_pwm_reg);
  static DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm_reg, set_pwm_reg);
  static DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, show_pwm_reg, set_pwm_reg);
  static DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR, show_pwm_enable,
  	set_pwm_enable);
  static DEVICE_ATTR(pwm2_enable, S_IRUGO | S_IWUSR, show_pwm_enable,
  	set_pwm_enable);
  static DEVICE_ATTR(pwm3_enable, S_IRUGO | S_IWUSR, show_pwm_enable,
  	set_pwm_enable);
  static DEVICE_ATTR(temp1_auto_point1_pwm, S_IRUGO | S_IWUSR,
  	show_auto_pwm_min, set_auto_pwm_min);
  static DEVICE_ATTR(temp2_auto_point1_pwm, S_IRUGO | S_IWUSR,
  	show_auto_pwm_min, set_auto_pwm_min);
  static DEVICE_ATTR(temp3_auto_point1_pwm, S_IRUGO | S_IWUSR,
  	show_auto_pwm_min, set_auto_pwm_min);
  
  static DEVICE_ATTR(temp1_auto_point2_pwm, S_IRUGO, show_auto_pwm_max, NULL);
  static DEVICE_ATTR(temp2_auto_point2_pwm, S_IRUGO, show_auto_pwm_max, NULL);
  static DEVICE_ATTR(temp3_auto_point2_pwm, S_IRUGO, show_auto_pwm_max, NULL);
  
  static struct attribute *adm1026_attributes[] = {
  	&sensor_dev_attr_in0_input.dev_attr.attr,
  	&sensor_dev_attr_in0_max.dev_attr.attr,
  	&sensor_dev_attr_in0_min.dev_attr.attr,
  	&sensor_dev_attr_in0_alarm.dev_attr.attr,
  	&sensor_dev_attr_in1_input.dev_attr.attr,
  	&sensor_dev_attr_in1_max.dev_attr.attr,
  	&sensor_dev_attr_in1_min.dev_attr.attr,
  	&sensor_dev_attr_in1_alarm.dev_attr.attr,
  	&sensor_dev_attr_in2_input.dev_attr.attr,
  	&sensor_dev_attr_in2_max.dev_attr.attr,
  	&sensor_dev_attr_in2_min.dev_attr.attr,
  	&sensor_dev_attr_in2_alarm.dev_attr.attr,
  	&sensor_dev_attr_in3_input.dev_attr.attr,
  	&sensor_dev_attr_in3_max.dev_attr.attr,
  	&sensor_dev_attr_in3_min.dev_attr.attr,
  	&sensor_dev_attr_in3_alarm.dev_attr.attr,
  	&sensor_dev_attr_in4_input.dev_attr.attr,
  	&sensor_dev_attr_in4_max.dev_attr.attr,
  	&sensor_dev_attr_in4_min.dev_attr.attr,
  	&sensor_dev_attr_in4_alarm.dev_attr.attr,
  	&sensor_dev_attr_in5_input.dev_attr.attr,
  	&sensor_dev_attr_in5_max.dev_attr.attr,
  	&sensor_dev_attr_in5_min.dev_attr.attr,
  	&sensor_dev_attr_in5_alarm.dev_attr.attr,
  	&sensor_dev_attr_in6_input.dev_attr.attr,
  	&sensor_dev_attr_in6_max.dev_attr.attr,
  	&sensor_dev_attr_in6_min.dev_attr.attr,
  	&sensor_dev_attr_in6_alarm.dev_attr.attr,
  	&sensor_dev_attr_in7_input.dev_attr.attr,
  	&sensor_dev_attr_in7_max.dev_attr.attr,
  	&sensor_dev_attr_in7_min.dev_attr.attr,
  	&sensor_dev_attr_in7_alarm.dev_attr.attr,
  	&sensor_dev_attr_in10_input.dev_attr.attr,
  	&sensor_dev_attr_in10_max.dev_attr.attr,
  	&sensor_dev_attr_in10_min.dev_attr.attr,
  	&sensor_dev_attr_in10_alarm.dev_attr.attr,
  	&sensor_dev_attr_in11_input.dev_attr.attr,
  	&sensor_dev_attr_in11_max.dev_attr.attr,
  	&sensor_dev_attr_in11_min.dev_attr.attr,
  	&sensor_dev_attr_in11_alarm.dev_attr.attr,
  	&sensor_dev_attr_in12_input.dev_attr.attr,
  	&sensor_dev_attr_in12_max.dev_attr.attr,
  	&sensor_dev_attr_in12_min.dev_attr.attr,
  	&sensor_dev_attr_in12_alarm.dev_attr.attr,
  	&sensor_dev_attr_in13_input.dev_attr.attr,
  	&sensor_dev_attr_in13_max.dev_attr.attr,
  	&sensor_dev_attr_in13_min.dev_attr.attr,
  	&sensor_dev_attr_in13_alarm.dev_attr.attr,
  	&sensor_dev_attr_in14_input.dev_attr.attr,
  	&sensor_dev_attr_in14_max.dev_attr.attr,
  	&sensor_dev_attr_in14_min.dev_attr.attr,
  	&sensor_dev_attr_in14_alarm.dev_attr.attr,
  	&sensor_dev_attr_in15_input.dev_attr.attr,
  	&sensor_dev_attr_in15_max.dev_attr.attr,
  	&sensor_dev_attr_in15_min.dev_attr.attr,
  	&sensor_dev_attr_in15_alarm.dev_attr.attr,
  	&sensor_dev_attr_in16_input.dev_attr.attr,
  	&sensor_dev_attr_in16_max.dev_attr.attr,
  	&sensor_dev_attr_in16_min.dev_attr.attr,
  	&sensor_dev_attr_in16_alarm.dev_attr.attr,
  	&sensor_dev_attr_fan1_input.dev_attr.attr,
  	&sensor_dev_attr_fan1_div.dev_attr.attr,
  	&sensor_dev_attr_fan1_min.dev_attr.attr,
  	&sensor_dev_attr_fan1_alarm.dev_attr.attr,
  	&sensor_dev_attr_fan2_input.dev_attr.attr,
  	&sensor_dev_attr_fan2_div.dev_attr.attr,
  	&sensor_dev_attr_fan2_min.dev_attr.attr,
  	&sensor_dev_attr_fan2_alarm.dev_attr.attr,
  	&sensor_dev_attr_fan3_input.dev_attr.attr,
  	&sensor_dev_attr_fan3_div.dev_attr.attr,
  	&sensor_dev_attr_fan3_min.dev_attr.attr,
  	&sensor_dev_attr_fan3_alarm.dev_attr.attr,
  	&sensor_dev_attr_fan4_input.dev_attr.attr,
  	&sensor_dev_attr_fan4_div.dev_attr.attr,
  	&sensor_dev_attr_fan4_min.dev_attr.attr,
  	&sensor_dev_attr_fan4_alarm.dev_attr.attr,
  	&sensor_dev_attr_fan5_input.dev_attr.attr,
  	&sensor_dev_attr_fan5_div.dev_attr.attr,
  	&sensor_dev_attr_fan5_min.dev_attr.attr,
  	&sensor_dev_attr_fan5_alarm.dev_attr.attr,
  	&sensor_dev_attr_fan6_input.dev_attr.attr,
  	&sensor_dev_attr_fan6_div.dev_attr.attr,
  	&sensor_dev_attr_fan6_min.dev_attr.attr,
  	&sensor_dev_attr_fan6_alarm.dev_attr.attr,
  	&sensor_dev_attr_fan7_input.dev_attr.attr,
  	&sensor_dev_attr_fan7_div.dev_attr.attr,
  	&sensor_dev_attr_fan7_min.dev_attr.attr,
  	&sensor_dev_attr_fan7_alarm.dev_attr.attr,
  	&sensor_dev_attr_fan8_input.dev_attr.attr,
  	&sensor_dev_attr_fan8_div.dev_attr.attr,
  	&sensor_dev_attr_fan8_min.dev_attr.attr,
  	&sensor_dev_attr_fan8_alarm.dev_attr.attr,
  	&sensor_dev_attr_temp1_input.dev_attr.attr,
  	&sensor_dev_attr_temp1_max.dev_attr.attr,
  	&sensor_dev_attr_temp1_min.dev_attr.attr,
  	&sensor_dev_attr_temp1_alarm.dev_attr.attr,
  	&sensor_dev_attr_temp2_input.dev_attr.attr,
  	&sensor_dev_attr_temp2_max.dev_attr.attr,
  	&sensor_dev_attr_temp2_min.dev_attr.attr,
  	&sensor_dev_attr_temp2_alarm.dev_attr.attr,
  	&sensor_dev_attr_temp1_offset.dev_attr.attr,
  	&sensor_dev_attr_temp2_offset.dev_attr.attr,
  	&sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr,
  	&sensor_dev_attr_temp2_auto_point1_temp.dev_attr.attr,
  	&sensor_dev_attr_temp1_auto_point1_temp_hyst.dev_attr.attr,
  	&sensor_dev_attr_temp2_auto_point1_temp_hyst.dev_attr.attr,
  	&sensor_dev_attr_temp1_auto_point2_temp.dev_attr.attr,
  	&sensor_dev_attr_temp2_auto_point2_temp.dev_attr.attr,
  	&sensor_dev_attr_temp1_crit.dev_attr.attr,
  	&sensor_dev_attr_temp2_crit.dev_attr.attr,
  	&dev_attr_temp1_crit_enable.attr,
  	&dev_attr_temp2_crit_enable.attr,
  	&dev_attr_cpu0_vid.attr,
  	&dev_attr_vrm.attr,
  	&dev_attr_alarms.attr,
  	&dev_attr_alarm_mask.attr,
  	&dev_attr_gpio.attr,
  	&dev_attr_gpio_mask.attr,
  	&dev_attr_pwm1.attr,
  	&dev_attr_pwm2.attr,
  	&dev_attr_pwm3.attr,
  	&dev_attr_pwm1_enable.attr,
  	&dev_attr_pwm2_enable.attr,
  	&dev_attr_pwm3_enable.attr,
  	&dev_attr_temp1_auto_point1_pwm.attr,
  	&dev_attr_temp2_auto_point1_pwm.attr,
  	&dev_attr_temp1_auto_point2_pwm.attr,
  	&dev_attr_temp2_auto_point2_pwm.attr,
  	&dev_attr_analog_out.attr,
  	NULL
  };
  
  static const struct attribute_group adm1026_group = {
  	.attrs = adm1026_attributes,
  };
  
  static struct attribute *adm1026_attributes_temp3[] = {
  	&sensor_dev_attr_temp3_input.dev_attr.attr,
  	&sensor_dev_attr_temp3_max.dev_attr.attr,
  	&sensor_dev_attr_temp3_min.dev_attr.attr,
  	&sensor_dev_attr_temp3_alarm.dev_attr.attr,
  	&sensor_dev_attr_temp3_offset.dev_attr.attr,
  	&sensor_dev_attr_temp3_auto_point1_temp.dev_attr.attr,
  	&sensor_dev_attr_temp3_auto_point1_temp_hyst.dev_attr.attr,
  	&sensor_dev_attr_temp3_auto_point2_temp.dev_attr.attr,
  	&sensor_dev_attr_temp3_crit.dev_attr.attr,
  	&dev_attr_temp3_crit_enable.attr,
  	&dev_attr_temp3_auto_point1_pwm.attr,
  	&dev_attr_temp3_auto_point2_pwm.attr,
  	NULL
  };
  
  static const struct attribute_group adm1026_group_temp3 = {
  	.attrs = adm1026_attributes_temp3,
  };
  
  static struct attribute *adm1026_attributes_in8_9[] = {
  	&sensor_dev_attr_in8_input.dev_attr.attr,
  	&sensor_dev_attr_in8_max.dev_attr.attr,
  	&sensor_dev_attr_in8_min.dev_attr.attr,
  	&sensor_dev_attr_in8_alarm.dev_attr.attr,
  	&sensor_dev_attr_in9_input.dev_attr.attr,
  	&sensor_dev_attr_in9_max.dev_attr.attr,
  	&sensor_dev_attr_in9_min.dev_attr.attr,
  	&sensor_dev_attr_in9_alarm.dev_attr.attr,
  	NULL
  };
  
  static const struct attribute_group adm1026_group_in8_9 = {
  	.attrs = adm1026_attributes_in8_9,
  };
  
  /* Return 0 if detection is successful, -ENODEV otherwise */
  static int adm1026_detect(struct i2c_client *client,
  			  struct i2c_board_info *info)
  {
  	struct i2c_adapter *adapter = client->adapter;
  	int address = client->addr;
  	int company, verstep;
  
  	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
  		/* We need to be able to do byte I/O */
  		return -ENODEV;
  	};
  
  	/* Now, we do the remaining detection. */
  
  	company = adm1026_read_value(client, ADM1026_REG_COMPANY);
  	verstep = adm1026_read_value(client, ADM1026_REG_VERSTEP);
  
  	dev_dbg(&adapter->dev, "Detecting device at %d,0x%02x with"
  		" COMPANY: 0x%02x and VERSTEP: 0x%02x\n",
  		i2c_adapter_id(client->adapter), client->addr,
  		company, verstep);
  
  	/* Determine the chip type. */
  	dev_dbg(&adapter->dev, "Autodetecting device at %d,0x%02x...\n",
  		i2c_adapter_id(adapter), address);
  	if (company == ADM1026_COMPANY_ANALOG_DEV
  	    && verstep == ADM1026_VERSTEP_ADM1026) {
  		/* Analog Devices ADM1026 */
  	} else if (company == ADM1026_COMPANY_ANALOG_DEV
  		&& (verstep & 0xf0) == ADM1026_VERSTEP_GENERIC) {
  		dev_err(&adapter->dev, "Unrecognized stepping "
  			"0x%02x. Defaulting to ADM1026.\n", verstep);
  	} else if ((verstep & 0xf0) == ADM1026_VERSTEP_GENERIC) {
  		dev_err(&adapter->dev, "Found version/stepping "
  			"0x%02x. Assuming generic ADM1026.\n",
  			verstep);
  	} else {
  		dev_dbg(&adapter->dev, "Autodetection failed\n");
  		/* Not an ADM1026... */
  		return -ENODEV;
  	}
  
  	strlcpy(info->type, "adm1026", I2C_NAME_SIZE);
  
  	return 0;
  }
  
  static int adm1026_probe(struct i2c_client *client,
  			 const struct i2c_device_id *id)
  {
  	struct adm1026_data *data;
  	int err;
  
  	data = devm_kzalloc(&client->dev, sizeof(struct adm1026_data),
  			    GFP_KERNEL);
  	if (!data)
  		return -ENOMEM;
  
  	i2c_set_clientdata(client, data);
  	mutex_init(&data->update_lock);
  
  	/* Set the VRM version */
  	data->vrm = vid_which_vrm();
  
  	/* Initialize the ADM1026 chip */
  	adm1026_init_client(client);
  
  	/* Register sysfs hooks */
  	err = sysfs_create_group(&client->dev.kobj, &adm1026_group);
  	if (err)
  		return err;
  	if (data->config1 & CFG1_AIN8_9)
  		err = sysfs_create_group(&client->dev.kobj,
  					 &adm1026_group_in8_9);
  	else
  		err = sysfs_create_group(&client->dev.kobj,
  					 &adm1026_group_temp3);
  	if (err)
  		goto exitremove;
  
  	data->hwmon_dev = hwmon_device_register(&client->dev);
  	if (IS_ERR(data->hwmon_dev)) {
  		err = PTR_ERR(data->hwmon_dev);
  		goto exitremove;
  	}
  
  	return 0;
  
  	/* Error out and cleanup code */
  exitremove:
  	sysfs_remove_group(&client->dev.kobj, &adm1026_group);
  	if (data->config1 & CFG1_AIN8_9)
  		sysfs_remove_group(&client->dev.kobj, &adm1026_group_in8_9);
  	else
  		sysfs_remove_group(&client->dev.kobj, &adm1026_group_temp3);
  	return err;
  }
  
  static int adm1026_remove(struct i2c_client *client)
  {
  	struct adm1026_data *data = i2c_get_clientdata(client);
  	hwmon_device_unregister(data->hwmon_dev);
  	sysfs_remove_group(&client->dev.kobj, &adm1026_group);
  	if (data->config1 & CFG1_AIN8_9)
  		sysfs_remove_group(&client->dev.kobj, &adm1026_group_in8_9);
  	else
  		sysfs_remove_group(&client->dev.kobj, &adm1026_group_temp3);
  	return 0;
  }
  
  module_i2c_driver(adm1026_driver);
  
  MODULE_LICENSE("GPL");
  MODULE_AUTHOR("Philip Pokorny <ppokorny@penguincomputing.com>, "
  	      "Justin Thiessen <jthiessen@penguincomputing.com>");
  MODULE_DESCRIPTION("ADM1026 driver");
  