text: /* ST Microelectronics LIS2MDL 3-axis magnetometer sensor
   *
   * Copyright (c) 2018-2019 STMicroelectronics
   *
   * SPDX-License-Identifier: Apache-2.0
   *
   * Datasheet:
   * https://www.st.com/resource/en/datasheet/lis2mdl.pdf
   */
  
  #ifndef __MAG_LIS2MDL_H
  #define __MAG_LIS2MDL_H
  
  #include <drivers/spi.h>
  #include <drivers/gpio.h>
  #include <drivers/sensor.h>
  #include <sys/util.h>
  #include "lis2mdl_reg.h"
  
  union axis3bit16_t {
  	s16_t i16bit[3];
  	u8_t u8bit[6];
  };
  
  union axis1bit16_t {
  	s16_t i16bit;
  	u8_t u8bit[2];
  };
  
  struct lis2mdl_config {
  	char *master_dev_name;
  	int (*bus_init)(struct device *dev);
  #ifdef CONFIG_LIS2MDL_TRIGGER
  	char *gpio_name;
  	u32_t gpio_pin;
  	u8_t gpio_flags;
  #endif  /* CONFIG_LIS2MDL_TRIGGER */
  #if DT_ANY_INST_ON_BUS_STATUS_OKAY(i2c)
  	u16_t i2c_slv_addr;
  #elif DT_ANY_INST_ON_BUS_STATUS_OKAY(spi)
  	struct spi_config spi_conf;
  #if DT_INST_SPI_DEV_HAS_CS_GPIOS(0)
  	const char *gpio_cs_port;
  	u8_t cs_gpio;
  #endif /* DT_INST_SPI_DEV_HAS_CS_GPIOS(0) */
  #endif /* DT_ANY_INST_ON_BUS_STATUS_OKAY(spi) */
  };
  
  /* Sensor data */
  struct lis2mdl_data {
  	struct device *bus;
  	u16_t i2c_addr;
  	s16_t mag[3];
  	s32_t temp_sample;
  
  	stmdev_ctx_t *ctx;
  
  #if DT_ANY_INST_ON_BUS_STATUS_OKAY(i2c)
  	stmdev_ctx_t ctx_i2c;
  #elif DT_ANY_INST_ON_BUS_STATUS_OKAY(spi)
  	stmdev_ctx_t ctx_spi;
  #endif
  
  #ifdef CONFIG_LIS2MDL_TRIGGER
  	struct device *gpio;
  	struct gpio_callback gpio_cb;
  
  	sensor_trigger_handler_t handler_drdy;
  
  #if defined(CONFIG_LIS2MDL_TRIGGER_OWN_THREAD)
  	K_THREAD_STACK_MEMBER(thread_stack, CONFIG_LIS2MDL_THREAD_STACK_SIZE);
  	struct k_thread thread;
  	struct k_sem gpio_sem;
  #elif defined(CONFIG_LIS2MDL_TRIGGER_GLOBAL_THREAD)
  	struct k_work work;
  	struct device *dev;
  #endif  /* CONFIG_LIS2MDL_TRIGGER_GLOBAL_THREAD */
  #endif  /* CONFIG_LIS2MDL_TRIGGER */
  #if DT_INST_SPI_DEV_HAS_CS_GPIOS(0)
  	struct spi_cs_control cs_ctrl;
  #endif /* DT_INST_SPI_DEV_HAS_CS_GPIOS(0) */
  };
  
  int lis2mdl_spi_init(struct device *dev);
  int lis2mdl_i2c_init(struct device *dev);
  
  #ifdef CONFIG_LIS2MDL_TRIGGER
  int lis2mdl_init_interrupt(struct device *dev);
  int lis2mdl_trigger_set(struct device *dev,
  			  const struct sensor_trigger *trig,
  			  sensor_trigger_handler_t handler);
  #endif /* CONFIG_LIS2MDL_TRIGGER */
  
  #endif /* __MAG_LIS2MDL_H */
  