drivers/iio/common/ms_sensors/ms_sensors_i2c.h

   1 /*
   2  * Measurements Specialties common sensor driver
   3  *
   4  * Copyright (c) 2015 Measurement-Specialties
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #ifndef _MS_SENSORS_I2C_H
  12 #define _MS_SENSORS_I2C_H
  13
  14 #include <linux/i2c.h>
  15 #include <linux/mutex.h>
  16
  17 #define MS_SENSORS_TP_PROM_WORDS_NB             7
  18
  19 /**
  20  * struct ms_ht_dev - Humidity/Temperature sensor device structure
  21  * @client:     i2c client
  22  * @lock:       lock protecting the i2c conversion
  23  * @res_index:  index to selected sensor resolution
  24  */
  25 struct ms_ht_dev {
  26         struct i2c_client *client;
  27         struct mutex lock;
  28         u8 res_index;
  29 };
  30
  31 /**
  32  * struct ms_tp_dev - Temperature/Pressure sensor device structure
  33  * @client:     i2c client
  34  * @lock:       lock protecting the i2c conversion
  35  * @prom:       array of PROM coefficients used for conversion. Added element
  36  *              for CRC computation
  37  * @res_index:  index to selected sensor resolution
  38  */
  39 struct ms_tp_dev {
  40         struct i2c_client *client;
  41         struct mutex lock;
  42         u16 prom[MS_SENSORS_TP_PROM_WORDS_NB + 1];
  43         u8 res_index;
  44 };
  45
  46 int ms_sensors_reset(void *cli, u8 cmd, unsigned int delay);
  47 int ms_sensors_read_prom_word(void *cli, int cmd, u16 *word);
  48 int ms_sensors_convert_and_read(void *cli, u8 conv, u8 rd,
  49                                 unsigned int delay, u32 *adc);
  50 int ms_sensors_read_serial(struct i2c_client *client, u64 *sn);
  51 ssize_t ms_sensors_show_serial(struct ms_ht_dev *dev_data, char *buf);
  52 ssize_t ms_sensors_write_resolution(struct ms_ht_dev *dev_data, u8 i);
  53 ssize_t ms_sensors_show_battery_low(struct ms_ht_dev *dev_data, char *buf);
  54 ssize_t ms_sensors_show_heater(struct ms_ht_dev *dev_data, char *buf);
  55 ssize_t ms_sensors_write_heater(struct ms_ht_dev *dev_data,
  56                                 const char *buf, size_t len);
  57 int ms_sensors_ht_read_temperature(struct ms_ht_dev *dev_data,
  58                                    s32 *temperature);
  59 int ms_sensors_ht_read_humidity(struct ms_ht_dev *dev_data,
  60                                 u32 *humidity);
  61 int ms_sensors_tp_read_prom(struct ms_tp_dev *dev_data);
  62 int ms_sensors_read_temp_and_pressure(struct ms_tp_dev *dev_data,
  63                                       int *temperature,
  64                                       unsigned int *pressure);
  65
  66 #endif /* _MS_SENSORS_I2C_H */