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 */ 59