1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef BME680_H_ 3 #define BME680_H_ 4 5 #include <linux/regmap.h> 6 7 #define BME680_REG_CHIP_ID 0xD0 8 #define BME680_CHIP_ID_VAL 0x61 9 #define BME680_REG_SOFT_RESET 0xE0 10 #define BME680_CMD_SOFTRESET 0xB6 11 #define BME680_REG_STATUS 0x73 12 #define BME680_SPI_MEM_PAGE_BIT BIT(4) 13 #define BME680_SPI_MEM_PAGE_1_VAL 1 14 15 #define BME680_REG_TEMP_MSB 0x22 16 #define BME680_REG_PRESS_MSB 0x1F 17 #define BME680_REG_HUMIDITY_MSB 0x25 18 #define BME680_REG_GAS_MSB 0x2A 19 #define BME680_REG_GAS_R_LSB 0x2B 20 #define BME680_GAS_STAB_BIT BIT(4) 21 #define BME680_GAS_RANGE_MASK GENMASK(3, 0) 22 23 #define BME680_REG_CTRL_HUMIDITY 0x72 24 #define BME680_OSRS_HUMIDITY_MASK GENMASK(2, 0) 25 26 #define BME680_REG_CTRL_MEAS 0x74 27 #define BME680_OSRS_TEMP_MASK GENMASK(7, 5) 28 #define BME680_OSRS_PRESS_MASK GENMASK(4, 2) 29 #define BME680_MODE_MASK GENMASK(1, 0) 30 #define BME680_MODE_FORCED 1 31 #define BME680_MODE_SLEEP 0 32 33 #define BME680_REG_CONFIG 0x75 34 #define BME680_FILTER_MASK GENMASK(4, 2) 35 #define BME680_FILTER_COEFF_VAL BIT(1) 36 37 /* TEMP/PRESS/HUMID reading skipped */ 38 #define BME680_MEAS_SKIPPED 0x8000 39 40 #define BME680_MAX_OVERFLOW_VAL 0x40000000 41 #define BME680_HUM_REG_SHIFT_VAL 4 42 #define BME680_BIT_H1_DATA_MASK GENMASK(3, 0) 43 44 #define BME680_RHRANGE_MASK GENMASK(5, 4) 45 #define BME680_REG_RES_HEAT_VAL 0x00 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 GENMASK(15, 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_NEW_DATA_BIT BIT(7) 58 #define BME680_GAS_MEAS_BIT BIT(6) 59 #define BME680_MEAS_BIT BIT(5) 60 61 #define BME680_TEMP_NUM_BYTES 3 62 #define BME680_PRESS_NUM_BYTES 3 63 #define BME680_HUMID_NUM_BYTES 2 64 #define BME680_GAS_NUM_BYTES 2 65 66 #define BME680_MEAS_TRIM_MASK GENMASK(24, 4) 67 68 /* Datasheet Section 1.1, Table 1 */ 69 #define BME680_STARTUP_TIME_US 2000 70 71 /* Calibration Parameters */ 72 #define BME680_T2_LSB_REG 0x8A 73 #define BME680_H2_MSB_REG 0xE1 74 #define BME680_GH3_REG 0xEE 75 76 #define BME680_CALIB_RANGE_1_LEN 23 77 #define BME680_CALIB_RANGE_2_LEN 14 78 #define BME680_CALIB_RANGE_3_LEN 5 79 80 extern const struct regmap_config bme680_regmap_config; 81 82 int bme680_core_probe(struct device *dev, struct regmap *regmap, 83 const char *name); 84 85 #endif /* BME680_H_ */ 86