drivers/iio/pressure/ms5611.h

   1 /*
   2  * MS5611 pressure and temperature sensor driver
   3  *
   4  * Copyright (c) Tomasz Duszynski <tduszyns@gmail.com>
   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
  12 #ifndef _MS5611_H
  13 #define _MS5611_H
  14
  15 #include <linux/device.h>
  16 #include <linux/iio/iio.h>
  17 #include <linux/mutex.h>
  18
  19 #define MS5611_RESET                    0x1e
  20 #define MS5611_READ_ADC                 0x00
  21 #define MS5611_READ_PROM_WORD           0xA0
  22 #define MS5611_START_TEMP_CONV          0x58
  23 #define MS5611_START_PRESSURE_CONV      0x48
  24
  25 #define MS5611_CONV_TIME_MIN            9040
  26 #define MS5611_CONV_TIME_MAX            10000
  27
  28 #define MS5611_PROM_WORDS_NB            8
  29
  30 enum {
  31         MS5611,
  32         MS5607,
  33 };
  34
  35 struct ms5611_chip_info {
  36         u16 prom[MS5611_PROM_WORDS_NB];
  37
  38         int (*temp_and_pressure_compensate)(struct ms5611_chip_info *chip_info,
  39                                             s32 *temp, s32 *pressure);
  40 };
  41
  42 struct ms5611_state {
  43         void *client;
  44         struct mutex lock;
  45
  46         int (*reset)(struct device *dev);
  47         int (*read_prom_word)(struct device *dev, int index, u16 *word);
  48         int (*read_adc_temp_and_pressure)(struct device *dev,
  49                                           s32 *temp, s32 *pressure);
  50
  51         struct ms5611_chip_info *chip_info;
  52 };
  53
  54 int ms5611_probe(struct iio_dev *indio_dev, struct device *dev, int type);
  55
  56 #endif /* _MS5611_H */