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 /* 29 * OverSampling Rate descriptor. 30 * Warning: cmd MUST be kept aligned on a word boundary (see 31 * m5611_spi_read_adc_temp_and_pressure in ms5611_spi.c). 32 */ 33 struct ms5611_osr { 34 unsigned long conv_usec; 35 u8 cmd; 36 unsigned short rate; 37 }; 38 39 struct ms5611_state { 40 void *client; 41 struct mutex lock; 42 43 const struct ms5611_osr *pressure_osr; 44 const struct ms5611_osr *temp_osr; 45 46 u16 prom[MS5611_PROM_WORDS_NB]; 47 48 int (*reset)(struct ms5611_state *st); 49 int (*read_prom_word)(struct ms5611_state *st, int index, u16 *word); 50 int (*read_adc_temp_and_pressure)(struct ms5611_state *st, 51 s32 *temp, s32 *pressure); 52 53 int (*compensate_temp_and_pressure)(struct ms5611_state *st, s32 *temp, 54 s32 *pressure); 55 struct regulator *vdd; 56 }; 57 58 int ms5611_probe(struct iio_dev *indio_dev, struct device *dev, 59 const char *name, int type); 60 void ms5611_remove(struct iio_dev *indio_dev); 61 62 #endif /* _MS5611_H */ 63