drivers/iio/pressure/ms5611.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * MS5611 pressure and temperature sensor driver
   4  *
   5  * Copyright (c) Tomasz Duszynski <tduszyns@gmail.com>
   6  *
   7  */
   8
   9 #ifndef _MS5611_H
  10 #define _MS5611_H
  11
  12 #include <linux/device.h>
  13 #include <linux/iio/iio.h>
  14 #include <linux/mutex.h>
  15
  16 struct regulator;
  17
  18 #define MS5611_RESET                    0x1e
  19 #define MS5611_READ_ADC                 0x00
  20 #define MS5611_READ_PROM_WORD           0xA0
  21 #define MS5611_PROM_WORDS_NB            8
  22
  23 enum {
  24         MS5611,
  25         MS5607,
  26 };
  27
  28 struct ms5611_chip_info {
  29         u16 prom[MS5611_PROM_WORDS_NB];
  30
  31         int (*temp_and_pressure_compensate)(struct ms5611_chip_info *chip_info,
  32                                             s32 *temp, s32 *pressure);
  33 };
  34
  35 /*
  36  * OverSampling Rate descriptor.
  37  * Warning: cmd MUST be kept aligned on a word boundary (see
  38  * m5611_spi_read_adc_temp_and_pressure in ms5611_spi.c).
  39  */
  40 struct ms5611_osr {
  41         unsigned long conv_usec;
  42         u8 cmd;
  43         unsigned short rate;
  44 };
  45
  46 struct ms5611_state {
  47         void *client;
  48         struct mutex lock;
  49
  50         const struct ms5611_osr *pressure_osr;
  51         const struct ms5611_osr *temp_osr;
  52
  53         int (*reset)(struct device *dev);
  54         int (*read_prom_word)(struct device *dev, int index, u16 *word);
  55         int (*read_adc_temp_and_pressure)(struct device *dev,
  56                                           s32 *temp, s32 *pressure);
  57
  58         struct ms5611_chip_info *chip_info;
  59         struct regulator *vdd;
  60 };
  61
  62 int ms5611_probe(struct iio_dev *indio_dev, struct device *dev,
  63                  const char *name, int type);
  64 int ms5611_remove(struct iio_dev *indio_dev);
  65
  66 #endif /* _MS5611_H */