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 struct regulator; 20 21 #define MS5611_RESET 0x1e 22 #define MS5611_READ_ADC 0x00 23 #define MS5611_READ_PROM_WORD 0xA0 24 #define MS5611_PROM_WORDS_NB 8 25 26 enum { 27 MS5611, 28 MS5607, 29 }; 30 31 struct ms5611_chip_info { 32 u16 prom[MS5611_PROM_WORDS_NB]; 33 34 int (*temp_and_pressure_compensate)(struct ms5611_chip_info *chip_info, 35 s32 *temp, s32 *pressure); 36 }; 37 38 /* 39 * OverSampling Rate descriptor. 40 * Warning: cmd MUST be kept aligned on a word boundary (see 41 * m5611_spi_read_adc_temp_and_pressure in ms5611_spi.c). 42 */ 43 struct ms5611_osr { 44 unsigned long conv_usec; 45 u8 cmd; 46 unsigned short rate; 47 }; 48 49 struct ms5611_state { 50 void *client; 51 struct mutex lock; 52 53 const struct ms5611_osr *pressure_osr; 54 const struct ms5611_osr *temp_osr; 55 56 int (*reset)(struct device *dev); 57 int (*read_prom_word)(struct device *dev, int index, u16 *word); 58 int (*read_adc_temp_and_pressure)(struct device *dev, 59 s32 *temp, s32 *pressure); 60 61 struct ms5611_chip_info *chip_info; 62 struct regulator *vdd; 63 }; 64 65 int ms5611_probe(struct iio_dev *indio_dev, struct device *dev, 66 const char *name, int type); 67 int ms5611_remove(struct iio_dev *indio_dev); 68 69 #endif /* _MS5611_H */ 70