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https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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56686ac80b
Add functionality to inject a specified amount of current to the heating plate before the start of the gas measurement to allow the sensor to reach faster to the requested temperature. Signed-off-by: Vasileios Amoiridis <vassilisamir@gmail.com> Link: https://patch.msgid.link/20241102131311.36210-5-vassilisamir@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
88 lines
2.5 KiB
C
88 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef BME680_H_
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#define BME680_H_
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#include <linux/regmap.h>
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#define BME680_REG_CHIP_ID 0xD0
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#define BME680_CHIP_ID_VAL 0x61
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#define BME680_REG_SOFT_RESET 0xE0
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#define BME680_CMD_SOFTRESET 0xB6
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#define BME680_REG_STATUS 0x73
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#define BME680_SPI_MEM_PAGE_BIT BIT(4)
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#define BME680_SPI_MEM_PAGE_1_VAL 1
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#define BME680_REG_TEMP_MSB 0x22
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#define BME680_REG_PRESS_MSB 0x1F
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#define BME680_REG_HUMIDITY_MSB 0x25
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#define BME680_REG_GAS_MSB 0x2A
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#define BME680_REG_GAS_R_LSB 0x2B
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#define BME680_GAS_STAB_BIT BIT(4)
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#define BME680_GAS_RANGE_MASK GENMASK(3, 0)
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#define BME680_REG_CTRL_HUMIDITY 0x72
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#define BME680_OSRS_HUMIDITY_MASK GENMASK(2, 0)
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#define BME680_REG_CTRL_MEAS 0x74
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#define BME680_OSRS_TEMP_MASK GENMASK(7, 5)
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#define BME680_OSRS_PRESS_MASK GENMASK(4, 2)
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#define BME680_MODE_MASK GENMASK(1, 0)
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#define BME680_REG_CONFIG 0x75
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#define BME680_FILTER_MASK GENMASK(4, 2)
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#define BME680_FILTER_COEFF_VAL BIT(1)
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/* TEMP/PRESS/HUMID reading skipped */
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#define BME680_MEAS_SKIPPED 0x8000
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#define BME680_MAX_OVERFLOW_VAL 0x40000000
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#define BME680_HUM_REG_SHIFT_VAL 4
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#define BME680_BIT_H1_DATA_MASK GENMASK(3, 0)
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#define BME680_RHRANGE_MASK GENMASK(5, 4)
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#define BME680_REG_RES_HEAT_VAL 0x00
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#define BME680_RSERROR_MASK GENMASK(7, 4)
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#define BME680_REG_IDAC_HEAT_0 0x50
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#define BME680_REG_RES_HEAT_0 0x5A
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#define BME680_REG_GAS_WAIT_0 0x64
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#define BME680_ADC_GAS_RES GENMASK(15, 6)
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#define BME680_AMB_TEMP 25
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#define BME680_REG_CTRL_GAS_1 0x71
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#define BME680_RUN_GAS_MASK BIT(4)
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#define BME680_NB_CONV_MASK GENMASK(3, 0)
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#define BME680_REG_MEAS_STAT_0 0x1D
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#define BME680_NEW_DATA_BIT BIT(7)
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#define BME680_GAS_MEAS_BIT BIT(6)
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#define BME680_MEAS_BIT BIT(5)
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#define BME680_TEMP_NUM_BYTES 3
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#define BME680_PRESS_NUM_BYTES 3
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#define BME680_HUMID_NUM_BYTES 2
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#define BME680_GAS_NUM_BYTES 2
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#define BME680_MEAS_TRIM_MASK GENMASK(24, 4)
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/* Datasheet Section 1.1, Table 1 */
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#define BME680_STARTUP_TIME_US 2000
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#define BME680_NUM_CHANNELS 4
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#define BME680_NUM_BULK_READ_REGS 15
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/* Calibration Parameters */
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#define BME680_T2_LSB_REG 0x8A
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#define BME680_H2_MSB_REG 0xE1
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#define BME680_GH3_REG 0xEE
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#define BME680_CALIB_RANGE_1_LEN 23
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#define BME680_CALIB_RANGE_2_LEN 14
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#define BME680_CALIB_RANGE_3_LEN 5
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extern const struct regmap_config bme680_regmap_config;
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int bme680_core_probe(struct device *dev, struct regmap *regmap,
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const char *name);
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#endif /* BME680_H_ */
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