1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef BME680_H_ 3 #define BME680_H_ 4 5 #include <linux/pm.h> 6 #include <linux/regmap.h> 7 8 #define BME680_REG_CHIP_ID 0xD0 9 #define BME680_CHIP_ID_VAL 0x61 10 #define BME680_REG_SOFT_RESET 0xE0 11 #define BME680_CMD_SOFTRESET 0xB6 12 #define BME680_REG_STATUS 0x73 13 #define BME680_SPI_MEM_PAGE_BIT BIT(4) 14 #define BME680_SPI_MEM_PAGE_1_VAL 1 15 16 #define BME680_REG_TEMP_MSB 0x22 17 #define BME680_REG_PRESS_MSB 0x1F 18 #define BME680_REG_HUMIDITY_MSB 0x25 19 #define BME680_REG_GAS_MSB 0x2A 20 #define BME680_REG_GAS_R_LSB 0x2B 21 #define BME680_GAS_STAB_BIT BIT(4) 22 #define BME680_GAS_RANGE_MASK GENMASK(3, 0) 23 24 #define BME680_REG_CTRL_HUMIDITY 0x72 25 #define BME680_OSRS_HUMIDITY_MASK GENMASK(2, 0) 26 27 #define BME680_REG_CTRL_MEAS 0x74 28 #define BME680_OSRS_TEMP_MASK GENMASK(7, 5) 29 #define BME680_OSRS_PRESS_MASK GENMASK(4, 2) 30 #define BME680_MODE_MASK GENMASK(1, 0) 31 32 #define BME680_REG_CONFIG 0x75 33 #define BME680_FILTER_MASK GENMASK(4, 2) 34 #define BME680_FILTER_COEFF_VAL BIT(1) 35 36 /* TEMP/PRESS/HUMID reading skipped */ 37 #define BME680_MEAS_SKIPPED 0x8000 38 39 #define BME680_MAX_OVERFLOW_VAL 0x40000000 40 #define BME680_HUM_REG_SHIFT_VAL 4 41 #define BME680_BIT_H1_DATA_MASK GENMASK(3, 0) 42 43 #define BME680_RHRANGE_MASK GENMASK(5, 4) 44 #define BME680_REG_RES_HEAT_VAL 0x00 45 #define BME680_RSERROR_MASK GENMASK(7, 4) 46 #define BME680_REG_IDAC_HEAT_0 0x50 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 #define BME680_NUM_CHANNELS 4 72 #define BME680_NUM_BULK_READ_REGS 15 73 74 /* Calibration Parameters */ 75 #define BME680_T2_LSB_REG 0x8A 76 #define BME680_H2_MSB_REG 0xE1 77 #define BME680_GH3_REG 0xEE 78 79 #define BME680_CALIB_RANGE_1_LEN 23 80 #define BME680_CALIB_RANGE_2_LEN 14 81 #define BME680_CALIB_RANGE_3_LEN 5 82 83 extern const struct regmap_config bme680_regmap_config; 84 extern const struct dev_pm_ops bme680_dev_pm_ops; 85 86 int bme680_core_probe(struct device *dev, struct regmap *regmap, 87 const char *name); 88 89 #endif /* BME680_H_ */ 90