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 */
67