1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef BME680_H_
3#define BME680_H_
4
5#define BME680_REG_CHIP_ID 0xD0
6#define BME680_CHIP_ID_VAL 0x61
7#define BME680_REG_SOFT_RESET 0xE0
8#define BME680_CMD_SOFTRESET 0xB6
9#define BME680_REG_STATUS 0x73
10#define BME680_SPI_MEM_PAGE_BIT BIT(4)
11#define BME680_SPI_MEM_PAGE_1_VAL 1
12
13#define BME680_REG_TEMP_MSB 0x22
14#define BME680_REG_PRESS_MSB 0x1F
15#define BM6880_REG_HUMIDITY_MSB 0x25
16#define BME680_REG_GAS_MSB 0x2A
17#define BME680_REG_GAS_R_LSB 0x2B
18#define BME680_GAS_STAB_BIT BIT(4)
19#define BME680_GAS_RANGE_MASK GENMASK(3, 0)
20
21#define BME680_REG_CTRL_HUMIDITY 0x72
22#define BME680_OSRS_HUMIDITY_MASK GENMASK(2, 0)
23
24#define BME680_REG_CTRL_MEAS 0x74
25#define BME680_OSRS_TEMP_MASK GENMASK(7, 5)
26#define BME680_OSRS_PRESS_MASK GENMASK(4, 2)
27#define BME680_MODE_MASK GENMASK(1, 0)
28#define BME680_MODE_FORCED 1
29#define BME680_MODE_SLEEP 0
30
31#define BME680_REG_CONFIG 0x75
32#define BME680_FILTER_MASK GENMASK(4, 2)
33#define BME680_FILTER_COEFF_VAL BIT(1)
34
35/* TEMP/PRESS/HUMID reading skipped */
36#define BME680_MEAS_SKIPPED 0x8000
37
38#define BME680_MAX_OVERFLOW_VAL 0x40000000
39#define BME680_HUM_REG_SHIFT_VAL 4
40#define BME680_BIT_H1_DATA_MASK GENMASK(3, 0)
41
42#define BME680_REG_RES_HEAT_RANGE 0x02
43#define BME680_RHRANGE_MASK GENMASK(5, 4)
44#define BME680_REG_RES_HEAT_VAL 0x00
45#define BME680_REG_RANGE_SW_ERR 0x04
46#define BME680_RSERROR_MASK GENMASK(7, 4)
47#define BME680_REG_RES_HEAT_0 0x5A
48#define BME680_REG_GAS_WAIT_0 0x64
49#define BME680_ADC_GAS_RES_SHIFT 6
50#define BME680_AMB_TEMP 25
51
52#define BME680_REG_CTRL_GAS_1 0x71
53#define BME680_RUN_GAS_MASK BIT(4)
54#define BME680_NB_CONV_MASK GENMASK(3, 0)
55
56#define BME680_REG_MEAS_STAT_0 0x1D
57#define BME680_GAS_MEAS_BIT BIT(6)
58
59/* Calibration Parameters */
60#define BME680_T2_LSB_REG 0x8A
61#define BME680_T3_REG 0x8C
62#define BME680_P1_LSB_REG 0x8E
63#define BME680_P2_LSB_REG 0x90
64#define BME680_P3_REG 0x92
65#define BME680_P4_LSB_REG 0x94
66#define BME680_P5_LSB_REG 0x96
67#define BME680_P7_REG 0x98
68#define BME680_P6_REG 0x99
69#define BME680_P8_LSB_REG 0x9C
70#define BME680_P9_LSB_REG 0x9E
71#define BME680_P10_REG 0xA0
72#define BME680_H2_LSB_REG 0xE2
73#define BME680_H2_MSB_REG 0xE1
74#define BME680_H1_MSB_REG 0xE3
75#define BME680_H1_LSB_REG 0xE2
76#define BME680_H3_REG 0xE4
77#define BME680_H4_REG 0xE5
78#define BME680_H5_REG 0xE6
79#define BME680_H6_REG 0xE7
80#define BME680_H7_REG 0xE8
81#define BME680_T1_LSB_REG 0xE9
82#define BME680_GH2_LSB_REG 0xEB
83#define BME680_GH1_REG 0xED
84#define BME680_GH3_REG 0xEE
85
86extern const struct regmap_config bme680_regmap_config;
87
88int bme680_core_probe(struct device *dev, struct regmap *regmap,
89 const char *name);
90
91#endif /* BME680_H_ */
92

source code of linux/drivers/iio/chemical/bme680.h