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 #define MS5611_RESET                    0x1e
  17 #define MS5611_READ_ADC                 0x00
  18 #define MS5611_READ_PROM_WORD           0xA0
  19 #define MS5611_PROM_WORDS_NB            8
  20
  21 enum {
  22         MS5611,
  23         MS5607,
  24 };
  25
  26 /*
  27  * OverSampling Rate descriptor.
  28  * Warning: cmd MUST be kept aligned on a word boundary (see
  29  * m5611_spi_read_adc_temp_and_pressure in ms5611_spi.c).
  30  */
  31 struct ms5611_osr {
  32         unsigned long conv_usec;
  33         u8 cmd;
  34         unsigned short rate;
  35 };
  36
  37 struct ms5611_state {
  38         void *client;
  39         struct mutex lock;
  40
  41         const struct ms5611_osr *pressure_osr;
  42         const struct ms5611_osr *temp_osr;
  43
  44         u16 prom[MS5611_PROM_WORDS_NB];
  45
  46         int (*reset)(struct ms5611_state *st);
  47         int (*read_prom_word)(struct ms5611_state *st, int index, u16 *word);
  48         int (*read_adc_temp_and_pressure)(struct ms5611_state *st,
  49                                           s32 *temp, s32 *pressure);
  50
  51         int (*compensate_temp_and_pressure)(struct ms5611_state *st, s32 *temp,
  52                                           s32 *pressure);
  53 };
  54
  55 int ms5611_probe(struct iio_dev *indio_dev, struct device *dev,
  56                  const char *name, int type);
  57
  58 #endif /* _MS5611_H */