diff options
Diffstat (limited to 'drivers/iio/chemical/bme680_core.c')
| -rw-r--r-- | drivers/iio/chemical/bme680_core.c | 1080 |
1 files changed, 668 insertions, 412 deletions
diff --git a/drivers/iio/chemical/bme680_core.c b/drivers/iio/chemical/bme680_core.c index 500f56834b01..70f81c4a96ba 100644 --- a/drivers/iio/chemical/bme680_core.c +++ b/drivers/iio/chemical/bme680_core.c @@ -8,18 +8,70 @@ * Datasheet: * https://ae-bst.resource.bosch.com/media/_tech/media/datasheets/BST-BME680-DS001-00.pdf */ -#include <linux/acpi.h> #include <linux/bitfield.h> +#include <linux/cleanup.h> #include <linux/delay.h> #include <linux/device.h> -#include <linux/module.h> #include <linux/log2.h> +#include <linux/module.h> +#include <linux/pm.h> +#include <linux/pm_runtime.h> #include <linux/regmap.h> +#include <linux/regulator/consumer.h> + +#include <linux/iio/buffer.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> +#include <linux/iio/trigger_consumer.h> +#include <linux/iio/triggered_buffer.h> + +#include <linux/unaligned.h> #include "bme680.h" +/* 1st set of calibration data */ +enum { + /* Temperature calib indexes */ + T2_LSB = 0, + T3 = 2, + /* Pressure calib indexes */ + P1_LSB = 4, + P2_LSB = 6, + P3 = 8, + P4_LSB = 10, + P5_LSB = 12, + P7 = 14, + P6 = 15, + P8_LSB = 18, + P9_LSB = 20, + P10 = 22, +}; + +/* 2nd set of calibration data */ +enum { + /* Humidity calib indexes */ + H2_MSB = 0, + H1_LSB = 1, + H3 = 3, + H4 = 4, + H5 = 5, + H6 = 6, + H7 = 7, + /* Stray T1 calib index */ + T1_LSB = 8, + /* Gas heater calib indexes */ + GH2_LSB = 10, + GH1 = 12, + GH3 = 13, +}; + +/* 3rd set of calibration data */ +enum { + RES_HEAT_VAL = 0, + RES_HEAT_RANGE = 2, + RANGE_SW_ERR = 4, +}; + struct bme680_calib { u16 par_t1; s16 par_t2; @@ -49,19 +101,45 @@ struct bme680_calib { s8 range_sw_err; }; +/* values of CTRL_MEAS register */ +enum bme680_op_mode { + BME680_MODE_SLEEP = 0, + BME680_MODE_FORCED = 1, +}; + +enum bme680_scan { + BME680_TEMP, + BME680_PRESS, + BME680_HUMID, + BME680_GAS, +}; + +static const char *const bme680_supply_names[] = { "vdd", "vddio" }; + struct bme680_data { struct regmap *regmap; struct bme680_calib bme680; + struct mutex lock; /* Protect multiple serial R/W ops to device. */ u8 oversampling_temp; u8 oversampling_press; u8 oversampling_humid; + u8 preheat_curr_mA; u16 heater_dur; u16 heater_temp; - /* - * Carryover value from temperature conversion, used in pressure - * and humidity compensation calculations. - */ - s32 t_fine; + + struct { + s32 chan[4]; + aligned_s64 ts; + } scan; + + union { + u8 buf[BME680_NUM_BULK_READ_REGS]; + unsigned int check; + __be16 be16; + u8 bme680_cal_buf_1[BME680_CALIB_RANGE_1_LEN]; + u8 bme680_cal_buf_2[BME680_CALIB_RANGE_2_LEN]; + u8 bme680_cal_buf_3[BME680_CALIB_RANGE_3_LEN]; + }; }; static const struct regmap_range bme680_volatile_ranges[] = { @@ -80,29 +158,73 @@ const struct regmap_config bme680_regmap_config = { .val_bits = 8, .max_register = 0xef, .volatile_table = &bme680_volatile_table, - .cache_type = REGCACHE_RBTREE, + .cache_type = REGCACHE_MAPLE, }; -EXPORT_SYMBOL_NS(bme680_regmap_config, IIO_BME680); +EXPORT_SYMBOL_NS(bme680_regmap_config, "IIO_BME680"); static const struct iio_chan_spec bme680_channels[] = { { .type = IIO_TEMP, + /* PROCESSED maintained for ABI backwards compatibility */ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) | + BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), + .scan_index = 0, + .scan_type = { + .sign = 's', + .realbits = 16, + .storagebits = 16, + .endianness = IIO_CPU, + }, }, { .type = IIO_PRESSURE, + /* PROCESSED maintained for ABI backwards compatibility */ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) | + BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), + .scan_index = 1, + .scan_type = { + .sign = 'u', + .realbits = 32, + .storagebits = 32, + .endianness = IIO_CPU, + }, }, { .type = IIO_HUMIDITYRELATIVE, + /* PROCESSED maintained for ABI backwards compatibility */ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) | + BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), + .scan_index = 2, + .scan_type = { + .sign = 'u', + .realbits = 32, + .storagebits = 32, + .endianness = IIO_CPU, + }, }, { .type = IIO_RESISTANCE, .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), + .scan_index = 3, + .scan_type = { + .sign = 'u', + .realbits = 32, + .storagebits = 32, + .endianness = IIO_CPU, + }, + }, + IIO_CHAN_SOFT_TIMESTAMP(4), + { + .type = IIO_CURRENT, + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), + .output = 1, + .scan_index = -1, }, }; @@ -110,217 +232,98 @@ static int bme680_read_calib(struct bme680_data *data, struct bme680_calib *calib) { struct device *dev = regmap_get_device(data->regmap); - unsigned int tmp, tmp_msb, tmp_lsb; + unsigned int tmp_msb, tmp_lsb; int ret; - __le16 buf; - - /* Temperature related coefficients */ - ret = regmap_bulk_read(data->regmap, BME680_T1_LSB_REG, - &buf, sizeof(buf)); - if (ret < 0) { - dev_err(dev, "failed to read BME680_T1_LSB_REG\n"); - return ret; - } - calib->par_t1 = le16_to_cpu(buf); ret = regmap_bulk_read(data->regmap, BME680_T2_LSB_REG, - &buf, sizeof(buf)); + data->bme680_cal_buf_1, + sizeof(data->bme680_cal_buf_1)); if (ret < 0) { - dev_err(dev, "failed to read BME680_T2_LSB_REG\n"); + dev_err(dev, "failed to read 1st set of calib data;\n"); return ret; } - calib->par_t2 = le16_to_cpu(buf); - ret = regmap_read(data->regmap, BME680_T3_REG, &tmp); + calib->par_t2 = get_unaligned_le16(&data->bme680_cal_buf_1[T2_LSB]); + calib->par_t3 = data->bme680_cal_buf_1[T3]; + calib->par_p1 = get_unaligned_le16(&data->bme680_cal_buf_1[P1_LSB]); + calib->par_p2 = get_unaligned_le16(&data->bme680_cal_buf_1[P2_LSB]); + calib->par_p3 = data->bme680_cal_buf_1[P3]; + calib->par_p4 = get_unaligned_le16(&data->bme680_cal_buf_1[P4_LSB]); + calib->par_p5 = get_unaligned_le16(&data->bme680_cal_buf_1[P5_LSB]); + calib->par_p7 = data->bme680_cal_buf_1[P7]; + calib->par_p6 = data->bme680_cal_buf_1[P6]; + calib->par_p8 = get_unaligned_le16(&data->bme680_cal_buf_1[P8_LSB]); + calib->par_p9 = get_unaligned_le16(&data->bme680_cal_buf_1[P9_LSB]); + calib->par_p10 = data->bme680_cal_buf_1[P10]; + + ret = regmap_bulk_read(data->regmap, BME680_H2_MSB_REG, + data->bme680_cal_buf_2, + sizeof(data->bme680_cal_buf_2)); if (ret < 0) { - dev_err(dev, "failed to read BME680_T3_REG\n"); + dev_err(dev, "failed to read 2nd set of calib data;\n"); return ret; } - calib->par_t3 = tmp; - /* Pressure related coefficients */ - ret = regmap_bulk_read(data->regmap, BME680_P1_LSB_REG, - &buf, sizeof(buf)); - if (ret < 0) { - dev_err(dev, "failed to read BME680_P1_LSB_REG\n"); - return ret; - } - calib->par_p1 = le16_to_cpu(buf); - - ret = regmap_bulk_read(data->regmap, BME680_P2_LSB_REG, - &buf, sizeof(buf)); - if (ret < 0) { - dev_err(dev, "failed to read BME680_P2_LSB_REG\n"); - return ret; - } - calib->par_p2 = le16_to_cpu(buf); - - ret = regmap_read(data->regmap, BME680_P3_REG, &tmp); - if (ret < 0) { - dev_err(dev, "failed to read BME680_P3_REG\n"); - return ret; - } - calib->par_p3 = tmp; - - ret = regmap_bulk_read(data->regmap, BME680_P4_LSB_REG, - &buf, sizeof(buf)); - if (ret < 0) { - dev_err(dev, "failed to read BME680_P4_LSB_REG\n"); - return ret; - } - calib->par_p4 = le16_to_cpu(buf); - - ret = regmap_bulk_read(data->regmap, BME680_P5_LSB_REG, - &buf, sizeof(buf)); - if (ret < 0) { - dev_err(dev, "failed to read BME680_P5_LSB_REG\n"); - return ret; - } - calib->par_p5 = le16_to_cpu(buf); - - ret = regmap_read(data->regmap, BME680_P6_REG, &tmp); - if (ret < 0) { - dev_err(dev, "failed to read BME680_P6_REG\n"); - return ret; - } - calib->par_p6 = tmp; - - ret = regmap_read(data->regmap, BME680_P7_REG, &tmp); - if (ret < 0) { - dev_err(dev, "failed to read BME680_P7_REG\n"); - return ret; - } - calib->par_p7 = tmp; - - ret = regmap_bulk_read(data->regmap, BME680_P8_LSB_REG, - &buf, sizeof(buf)); - if (ret < 0) { - dev_err(dev, "failed to read BME680_P8_LSB_REG\n"); - return ret; - } - calib->par_p8 = le16_to_cpu(buf); - - ret = regmap_bulk_read(data->regmap, BME680_P9_LSB_REG, - &buf, sizeof(buf)); - if (ret < 0) { - dev_err(dev, "failed to read BME680_P9_LSB_REG\n"); - return ret; - } - calib->par_p9 = le16_to_cpu(buf); - - ret = regmap_read(data->regmap, BME680_P10_REG, &tmp); - if (ret < 0) { - dev_err(dev, "failed to read BME680_P10_REG\n"); - return ret; - } - calib->par_p10 = tmp; - - /* Humidity related coefficients */ - ret = regmap_read(data->regmap, BME680_H1_MSB_REG, &tmp_msb); - if (ret < 0) { - dev_err(dev, "failed to read BME680_H1_MSB_REG\n"); - return ret; - } - ret = regmap_read(data->regmap, BME680_H1_LSB_REG, &tmp_lsb); - if (ret < 0) { - dev_err(dev, "failed to read BME680_H1_LSB_REG\n"); - return ret; - } + tmp_lsb = data->bme680_cal_buf_2[H1_LSB]; + tmp_msb = data->bme680_cal_buf_2[H1_LSB + 1]; calib->par_h1 = (tmp_msb << BME680_HUM_REG_SHIFT_VAL) | (tmp_lsb & BME680_BIT_H1_DATA_MASK); - ret = regmap_read(data->regmap, BME680_H2_MSB_REG, &tmp_msb); - if (ret < 0) { - dev_err(dev, "failed to read BME680_H2_MSB_REG\n"); - return ret; - } - ret = regmap_read(data->regmap, BME680_H2_LSB_REG, &tmp_lsb); - if (ret < 0) { - dev_err(dev, "failed to read BME680_H2_LSB_REG\n"); - return ret; - } + tmp_msb = data->bme680_cal_buf_2[H2_MSB]; + tmp_lsb = data->bme680_cal_buf_2[H2_MSB + 1]; calib->par_h2 = (tmp_msb << BME680_HUM_REG_SHIFT_VAL) | (tmp_lsb >> BME680_HUM_REG_SHIFT_VAL); - ret = regmap_read(data->regmap, BME680_H3_REG, &tmp); - if (ret < 0) { - dev_err(dev, "failed to read BME680_H3_REG\n"); - return ret; - } - calib->par_h3 = tmp; - - ret = regmap_read(data->regmap, BME680_H4_REG, &tmp); - if (ret < 0) { - dev_err(dev, "failed to read BME680_H4_REG\n"); - return ret; - } - calib->par_h4 = tmp; - - ret = regmap_read(data->regmap, BME680_H5_REG, &tmp); + calib->par_h3 = data->bme680_cal_buf_2[H3]; + calib->par_h4 = data->bme680_cal_buf_2[H4]; + calib->par_h5 = data->bme680_cal_buf_2[H5]; + calib->par_h6 = data->bme680_cal_buf_2[H6]; + calib->par_h7 = data->bme680_cal_buf_2[H7]; + calib->par_t1 = get_unaligned_le16(&data->bme680_cal_buf_2[T1_LSB]); + calib->par_gh2 = get_unaligned_le16(&data->bme680_cal_buf_2[GH2_LSB]); + calib->par_gh1 = data->bme680_cal_buf_2[GH1]; + calib->par_gh3 = data->bme680_cal_buf_2[GH3]; + + ret = regmap_bulk_read(data->regmap, BME680_REG_RES_HEAT_VAL, + data->bme680_cal_buf_3, + sizeof(data->bme680_cal_buf_3)); if (ret < 0) { - dev_err(dev, "failed to read BME680_H5_REG\n"); + dev_err(dev, "failed to read 3rd set of calib data;\n"); return ret; } - calib->par_h5 = tmp; - ret = regmap_read(data->regmap, BME680_H6_REG, &tmp); - if (ret < 0) { - dev_err(dev, "failed to read BME680_H6_REG\n"); - return ret; - } - calib->par_h6 = tmp; - - ret = regmap_read(data->regmap, BME680_H7_REG, &tmp); - if (ret < 0) { - dev_err(dev, "failed to read BME680_H7_REG\n"); - return ret; - } - calib->par_h7 = tmp; + calib->res_heat_val = data->bme680_cal_buf_3[RES_HEAT_VAL]; - /* Gas heater related coefficients */ - ret = regmap_read(data->regmap, BME680_GH1_REG, &tmp); - if (ret < 0) { - dev_err(dev, "failed to read BME680_GH1_REG\n"); - return ret; - } - calib->par_gh1 = tmp; + calib->res_heat_range = FIELD_GET(BME680_RHRANGE_MASK, + data->bme680_cal_buf_3[RES_HEAT_RANGE]); - ret = regmap_bulk_read(data->regmap, BME680_GH2_LSB_REG, - &buf, sizeof(buf)); - if (ret < 0) { - dev_err(dev, "failed to read BME680_GH2_LSB_REG\n"); - return ret; - } - calib->par_gh2 = le16_to_cpu(buf); + calib->range_sw_err = FIELD_GET(BME680_RSERROR_MASK, + data->bme680_cal_buf_3[RANGE_SW_ERR]); - ret = regmap_read(data->regmap, BME680_GH3_REG, &tmp); - if (ret < 0) { - dev_err(dev, "failed to read BME680_GH3_REG\n"); - return ret; - } - calib->par_gh3 = tmp; + return 0; +} - /* Other coefficients */ - ret = regmap_read(data->regmap, BME680_REG_RES_HEAT_RANGE, &tmp); - if (ret < 0) { - dev_err(dev, "failed to read resistance heat range\n"); - return ret; - } - calib->res_heat_range = FIELD_GET(BME680_RHRANGE_MASK, tmp); +static int bme680_read_temp_adc(struct bme680_data *data, u32 *adc_temp) +{ + struct device *dev = regmap_get_device(data->regmap); + u32 value_temp; + int ret; - ret = regmap_read(data->regmap, BME680_REG_RES_HEAT_VAL, &tmp); + ret = regmap_bulk_read(data->regmap, BME680_REG_TEMP_MSB, + data->buf, BME680_TEMP_NUM_BYTES); if (ret < 0) { - dev_err(dev, "failed to read resistance heat value\n"); + dev_err(dev, "failed to read temperature\n"); return ret; } - calib->res_heat_val = tmp; - ret = regmap_read(data->regmap, BME680_REG_RANGE_SW_ERR, &tmp); - if (ret < 0) { - dev_err(dev, "failed to read range software error\n"); - return ret; + value_temp = FIELD_GET(BME680_MEAS_TRIM_MASK, + get_unaligned_be24(data->buf)); + if (value_temp == BME680_MEAS_SKIPPED) { + /* reading was skipped */ + dev_err(dev, "reading temperature skipped\n"); + return -EINVAL; } - calib->range_sw_err = FIELD_GET(BME680_RSERROR_MASK, tmp); + *adc_temp = value_temp; return 0; } @@ -332,25 +335,65 @@ static int bme680_read_calib(struct bme680_data *data, * Returns temperature measurement in DegC, resolutions is 0.01 DegC. Therefore, * output value of "3233" represents 32.33 DegC. */ -static s16 bme680_compensate_temp(struct bme680_data *data, - s32 adc_temp) +static s32 bme680_calc_t_fine(struct bme680_data *data, u32 adc_temp) { struct bme680_calib *calib = &data->bme680; s64 var1, var2, var3; - s16 calc_temp; /* If the calibration is invalid, attempt to reload it */ if (!calib->par_t2) bme680_read_calib(data, calib); - var1 = (adc_temp >> 3) - ((s32)calib->par_t1 << 1); + var1 = ((s32)adc_temp >> 3) - ((s32)calib->par_t1 << 1); var2 = (var1 * calib->par_t2) >> 11; var3 = ((var1 >> 1) * (var1 >> 1)) >> 12; var3 = (var3 * ((s32)calib->par_t3 << 4)) >> 14; - data->t_fine = var2 + var3; - calc_temp = (data->t_fine * 5 + 128) >> 8; + return var2 + var3; /* t_fine = var2 + var3 */ +} + +static int bme680_get_t_fine(struct bme680_data *data, s32 *t_fine) +{ + u32 adc_temp; + int ret; + + ret = bme680_read_temp_adc(data, &adc_temp); + if (ret) + return ret; + + *t_fine = bme680_calc_t_fine(data, adc_temp); + + return 0; +} + +static s16 bme680_compensate_temp(struct bme680_data *data, + u32 adc_temp) +{ + return (bme680_calc_t_fine(data, adc_temp) * 5 + 128) / 256; +} + +static int bme680_read_press_adc(struct bme680_data *data, u32 *adc_press) +{ + struct device *dev = regmap_get_device(data->regmap); + u32 value_press; + int ret; + + ret = regmap_bulk_read(data->regmap, BME680_REG_PRESS_MSB, + data->buf, BME680_PRESS_NUM_BYTES); + if (ret < 0) { + dev_err(dev, "failed to read pressure\n"); + return ret; + } + + value_press = FIELD_GET(BME680_MEAS_TRIM_MASK, + get_unaligned_be24(data->buf)); + if (value_press == BME680_MEAS_SKIPPED) { + /* reading was skipped */ + dev_err(dev, "reading pressure skipped\n"); + return -EINVAL; + } + *adc_press = value_press; - return calc_temp; + return 0; } /* @@ -361,12 +404,12 @@ static s16 bme680_compensate_temp(struct bme680_data *data, * 97356 Pa = 973.56 hPa. */ static u32 bme680_compensate_press(struct bme680_data *data, - u32 adc_press) + u32 adc_press, s32 t_fine) { struct bme680_calib *calib = &data->bme680; s32 var1, var2, var3, press_comp; - var1 = (data->t_fine >> 1) - 64000; + var1 = (t_fine >> 1) - 64000; var2 = ((((var1 >> 2) * (var1 >> 2)) >> 11) * calib->par_p6) >> 2; var2 = var2 + (var1 * calib->par_p5 << 1); var2 = (var2 >> 2) + ((s32)calib->par_p4 << 16); @@ -394,6 +437,30 @@ static u32 bme680_compensate_press(struct bme680_data *data, return press_comp; } +static int bme680_read_humid_adc(struct bme680_data *data, u32 *adc_humidity) +{ + struct device *dev = regmap_get_device(data->regmap); + u32 value_humidity; + int ret; + + ret = regmap_bulk_read(data->regmap, BME680_REG_HUMIDITY_MSB, + &data->be16, BME680_HUMID_NUM_BYTES); + if (ret < 0) { + dev_err(dev, "failed to read humidity\n"); + return ret; + } + + value_humidity = be16_to_cpu(data->be16); + if (value_humidity == BME680_MEAS_SKIPPED) { + /* reading was skipped */ + dev_err(dev, "reading humidity skipped\n"); + return -EINVAL; + } + *adc_humidity = value_humidity; + + return 0; +} + /* * Taken from Bosch BME680 API: * https://github.com/BoschSensortec/BME680_driver/blob/63bb5336/bme680.c#L937 @@ -402,15 +469,15 @@ static u32 bme680_compensate_press(struct bme680_data *data, * value of "43215" represents 43.215 %rH. */ static u32 bme680_compensate_humid(struct bme680_data *data, - u16 adc_humid) + u16 adc_humid, s32 t_fine) { struct bme680_calib *calib = &data->bme680; s32 var1, var2, var3, var4, var5, var6, temp_scaled, calc_hum; - temp_scaled = (data->t_fine * 5 + 128) >> 8; - var1 = (adc_humid - ((s32) ((s32) calib->par_h1 * 16))) - - (((temp_scaled * (s32) calib->par_h3) / 100) >> 1); - var2 = ((s32) calib->par_h2 * + temp_scaled = (t_fine * 5 + 128) >> 8; + var1 = (adc_humid - (((s32)calib->par_h1 * 16))) - + (((temp_scaled * calib->par_h3) / 100) >> 1); + var2 = (calib->par_h2 * (((temp_scaled * calib->par_h4) / 100) + (((temp_scaled * ((temp_scaled * calib->par_h5) / 100)) >> 6) / 100) + (1 << 14))) >> 10; @@ -442,19 +509,19 @@ static u32 bme680_compensate_gas(struct bme680_data *data, u16 gas_res_adc, u32 calc_gas_res; /* Look up table for the possible gas range values */ - const u32 lookupTable[16] = {2147483647u, 2147483647u, - 2147483647u, 2147483647u, 2147483647u, - 2126008810u, 2147483647u, 2130303777u, - 2147483647u, 2147483647u, 2143188679u, - 2136746228u, 2147483647u, 2126008810u, - 2147483647u, 2147483647u}; - - var1 = ((1340 + (5 * (s64) calib->range_sw_err)) * - ((s64) lookupTable[gas_range])) >> 16; + static const u32 lookup_table[16] = { + 2147483647u, 2147483647u, 2147483647u, 2147483647u, + 2147483647u, 2126008810u, 2147483647u, 2130303777u, + 2147483647u, 2147483647u, 2143188679u, 2136746228u, + 2147483647u, 2126008810u, 2147483647u, 2147483647u + }; + + var1 = ((1340LL + (5 * calib->range_sw_err)) * + (lookup_table[gas_range])) >> 16; var2 = ((gas_res_adc << 15) - 16777216) + var1; var3 = ((125000 << (15 - gas_range)) * var1) >> 9; var3 += (var2 >> 1); - calc_gas_res = div64_s64(var3, (s64) var2); + calc_gas_res = div64_s64(var3, (s64)var2); return calc_gas_res; } @@ -472,7 +539,7 @@ static u8 bme680_calc_heater_res(struct bme680_data *data, u16 temp) if (temp > 400) /* Cap temperature */ temp = 400; - var1 = (((s32) BME680_AMB_TEMP * calib->par_gh3) / 1000) * 256; + var1 = (((s32)BME680_AMB_TEMP * calib->par_gh3) / 1000) * 256; var2 = (calib->par_gh1 + 784) * (((((calib->par_gh2 + 154009) * temp * 5) / 100) + 3276800) / 10); @@ -506,23 +573,22 @@ static u8 bme680_calc_heater_dur(u16 dur) return durval; } -static int bme680_set_mode(struct bme680_data *data, bool mode) +/* Taken from datasheet, section 5.3.3 */ +static u8 bme680_calc_heater_preheat_current(u8 curr) +{ + return 8 * curr - 1; +} + +static int bme680_set_mode(struct bme680_data *data, enum bme680_op_mode mode) { struct device *dev = regmap_get_device(data->regmap); int ret; - if (mode) { - ret = regmap_write_bits(data->regmap, BME680_REG_CTRL_MEAS, - BME680_MODE_MASK, BME680_MODE_FORCED); - if (ret < 0) - dev_err(dev, "failed to set forced mode\n"); - - } else { - ret = regmap_write_bits(data->regmap, BME680_REG_CTRL_MEAS, - BME680_MODE_MASK, BME680_MODE_SLEEP); - if (ret < 0) - dev_err(dev, "failed to set sleep mode\n"); - + ret = regmap_write_bits(data->regmap, BME680_REG_CTRL_MEAS, + BME680_MODE_MASK, mode); + if (ret < 0) { + dev_err(dev, "failed to set ctrl_meas register\n"); + return ret; } return ret; @@ -540,7 +606,6 @@ static u8 bme680_oversampling_to_reg(u8 val) static int bme680_wait_for_eoc(struct bme680_data *data) { struct device *dev = regmap_get_device(data->regmap); - unsigned int check; int ret; /* * (Sum of oversampling ratios * time per oversampling) + @@ -551,18 +616,18 @@ static int bme680_wait_for_eoc(struct bme680_data *data) data->oversampling_humid) * 1936) + (477 * 4) + (477 * 5) + 1000 + (data->heater_dur * 1000); - usleep_range(wait_eoc_us, wait_eoc_us + 100); + fsleep(wait_eoc_us); - ret = regmap_read(data->regmap, BME680_REG_MEAS_STAT_0, &check); + ret = regmap_read(data->regmap, BME680_REG_MEAS_STAT_0, &data->check); if (ret) { dev_err(dev, "failed to read measurement status register.\n"); return ret; } - if (check & BME680_MEAS_BIT) { + if (data->check & BME680_MEAS_BIT) { dev_err(dev, "Device measurement cycle incomplete.\n"); return -EBUSY; } - if (!(check & BME680_NEW_DATA_BIT)) { + if (!(data->check & BME680_NEW_DATA_BIT)) { dev_err(dev, "No new data available from the device.\n"); return -ENODATA; } @@ -576,9 +641,8 @@ static int bme680_chip_config(struct bme680_data *data) int ret; u8 osrs; - osrs = FIELD_PREP( - BME680_OSRS_HUMIDITY_MASK, - bme680_oversampling_to_reg(data->oversampling_humid)); + osrs = FIELD_PREP(BME680_OSRS_HUMIDITY_MASK, + bme680_oversampling_to_reg(data->oversampling_humid)); /* * Highly recommended to set oversampling of humidity before * temperature/pressure oversampling. @@ -592,8 +656,7 @@ static int bme680_chip_config(struct bme680_data *data) /* IIR filter settings */ ret = regmap_update_bits(data->regmap, BME680_REG_CONFIG, - BME680_FILTER_MASK, - BME680_FILTER_COEFF_VAL); + BME680_FILTER_MASK, BME680_FILTER_COEFF_VAL); if (ret < 0) { dev_err(dev, "failed to write config register\n"); return ret; @@ -606,8 +669,24 @@ static int bme680_chip_config(struct bme680_data *data) ret = regmap_write_bits(data->regmap, BME680_REG_CTRL_MEAS, BME680_OSRS_TEMP_MASK | BME680_OSRS_PRESS_MASK, osrs); - if (ret < 0) + if (ret < 0) { dev_err(dev, "failed to write ctrl_meas register\n"); + return ret; + } + + return 0; +} + +static int bme680_preheat_curr_config(struct bme680_data *data, u8 val) +{ + struct device *dev = regmap_get_device(data->regmap); + u8 heatr_curr; + int ret; + + heatr_curr = bme680_calc_heater_preheat_current(val); + ret = regmap_write(data->regmap, BME680_REG_IDAC_HEAT_0, heatr_curr); + if (ret < 0) + dev_err(dev, "failed to write idac_heat_0 register\n"); return ret; } @@ -618,6 +697,10 @@ static int bme680_gas_config(struct bme680_data *data) int ret; u8 heatr_res, heatr_dur; + ret = bme680_set_mode(data, BME680_MODE_SLEEP); + if (ret < 0) + return ret; + heatr_res = bme680_calc_heater_res(data, data->heater_temp); /* set target heater temperature */ @@ -636,6 +719,10 @@ static int bme680_gas_config(struct bme680_data *data) return ret; } + ret = bme680_preheat_curr_config(data, data->preheat_curr_mA); + if (ret) + return ret; + /* Enable the gas sensor and select heater profile set-point 0 */ ret = regmap_update_bits(data->regmap, BME680_REG_CTRL_GAS_1, BME680_RUN_GAS_MASK | BME680_NB_CONV_MASK, @@ -647,197 +734,187 @@ static int bme680_gas_config(struct bme680_data *data) return ret; } -static int bme680_read_temp(struct bme680_data *data, int *val) +static int bme680_read_temp(struct bme680_data *data, s16 *comp_temp) { - struct device *dev = regmap_get_device(data->regmap); int ret; - __be32 tmp = 0; - s32 adc_temp; - s16 comp_temp; - - /* set forced mode to trigger measurement */ - ret = bme680_set_mode(data, true); - if (ret < 0) - return ret; + u32 adc_temp; - ret = bme680_wait_for_eoc(data); + ret = bme680_read_temp_adc(data, &adc_temp); if (ret) return ret; - ret = regmap_bulk_read(data->regmap, BME680_REG_TEMP_MSB, - &tmp, 3); - if (ret < 0) { - dev_err(dev, "failed to read temperature\n"); - return ret; - } - - adc_temp = be32_to_cpu(tmp) >> 12; - if (adc_temp == BME680_MEAS_SKIPPED) { - /* reading was skipped */ - dev_err(dev, "reading temperature skipped\n"); - return -EINVAL; - } - comp_temp = bme680_compensate_temp(data, adc_temp); - /* - * val might be NULL if we're called by the read_press/read_humid - * routine which is called to get t_fine value used in - * compensate_press/compensate_humid to get compensated - * pressure/humidity readings. - */ - if (val) { - *val = comp_temp * 10; /* Centidegrees to millidegrees */ - return IIO_VAL_INT; - } - - return ret; + *comp_temp = bme680_compensate_temp(data, adc_temp); + return 0; } -static int bme680_read_press(struct bme680_data *data, - int *val, int *val2) +static int bme680_read_press(struct bme680_data *data, u32 *comp_press) { - struct device *dev = regmap_get_device(data->regmap); int ret; - __be32 tmp = 0; - s32 adc_press; + u32 adc_press; + s32 t_fine; - /* Read and compensate temperature to get a reading of t_fine */ - ret = bme680_read_temp(data, NULL); - if (ret < 0) + ret = bme680_get_t_fine(data, &t_fine); + if (ret) return ret; - ret = regmap_bulk_read(data->regmap, BME680_REG_PRESS_MSB, - &tmp, 3); - if (ret < 0) { - dev_err(dev, "failed to read pressure\n"); + ret = bme680_read_press_adc(data, &adc_press); + if (ret) return ret; - } - adc_press = be32_to_cpu(tmp) >> 12; - if (adc_press == BME680_MEAS_SKIPPED) { - /* reading was skipped */ - dev_err(dev, "reading pressure skipped\n"); - return -EINVAL; - } - - *val = bme680_compensate_press(data, adc_press); - *val2 = 1000; - return IIO_VAL_FRACTIONAL; + *comp_press = bme680_compensate_press(data, adc_press, t_fine); + return 0; } -static int bme680_read_humid(struct bme680_data *data, - int *val, int *val2) +static int bme680_read_humid(struct bme680_data *data, u32 *comp_humidity) { - struct device *dev = regmap_get_device(data->regmap); int ret; - __be16 tmp = 0; - s32 adc_humidity; - u32 comp_humidity; + u32 adc_humidity; + s32 t_fine; - /* Read and compensate temperature to get a reading of t_fine */ - ret = bme680_read_temp(data, NULL); - if (ret < 0) + ret = bme680_get_t_fine(data, &t_fine); + if (ret) return ret; - ret = regmap_bulk_read(data->regmap, BM6880_REG_HUMIDITY_MSB, - &tmp, sizeof(tmp)); - if (ret < 0) { - dev_err(dev, "failed to read humidity\n"); + ret = bme680_read_humid_adc(data, &adc_humidity); + if (ret) return ret; - } - adc_humidity = be16_to_cpu(tmp); - if (adc_humidity == BME680_MEAS_SKIPPED) { - /* reading was skipped */ - dev_err(dev, "reading humidity skipped\n"); - return -EINVAL; - } - comp_humidity = bme680_compensate_humid(data, adc_humidity); - - *val = comp_humidity; - *val2 = 1000; - return IIO_VAL_FRACTIONAL; + *comp_humidity = bme680_compensate_humid(data, adc_humidity, t_fine); + return 0; } -static int bme680_read_gas(struct bme680_data *data, - int *val) +static int bme680_read_gas(struct bme680_data *data, int *comp_gas_res) { struct device *dev = regmap_get_device(data->regmap); int ret; - __be16 tmp = 0; - unsigned int check; - u16 adc_gas_res; + u16 adc_gas_res, gas_regs_val; u8 gas_range; - /* Set heater settings */ - ret = bme680_gas_config(data); - if (ret < 0) { - dev_err(dev, "failed to set gas config\n"); - return ret; - } - - /* set forced mode to trigger measurement */ - ret = bme680_set_mode(data, true); - if (ret < 0) - return ret; - - ret = bme680_wait_for_eoc(data); - if (ret) - return ret; - - ret = regmap_read(data->regmap, BME680_REG_MEAS_STAT_0, &check); - if (check & BME680_GAS_MEAS_BIT) { + ret = regmap_read(data->regmap, BME680_REG_MEAS_STAT_0, &data->check); + if (data->check & BME680_GAS_MEAS_BIT) { dev_err(dev, "gas measurement incomplete\n"); return -EBUSY; } - ret = regmap_read(data->regmap, BME680_REG_GAS_R_LSB, &check); + ret = regmap_bulk_read(data->regmap, BME680_REG_GAS_MSB, + &data->be16, BME680_GAS_NUM_BYTES); if (ret < 0) { - dev_err(dev, "failed to read gas_r_lsb register\n"); + dev_err(dev, "failed to read gas resistance\n"); return ret; } + gas_regs_val = be16_to_cpu(data->be16); + adc_gas_res = FIELD_GET(BME680_ADC_GAS_RES, gas_regs_val); + /* * occurs if either the gas heating duration was insuffient * to reach the target heater temperature or the target * heater temperature was too high for the heater sink to * reach. */ - if ((check & BME680_GAS_STAB_BIT) == 0) { + if ((gas_regs_val & BME680_GAS_STAB_BIT) == 0) { dev_err(dev, "heater failed to reach the target temperature\n"); return -EINVAL; } - ret = regmap_bulk_read(data->regmap, BME680_REG_GAS_MSB, - &tmp, sizeof(tmp)); - if (ret < 0) { - dev_err(dev, "failed to read gas resistance\n"); - return ret; - } - - gas_range = check & BME680_GAS_RANGE_MASK; - adc_gas_res = be16_to_cpu(tmp) >> BME680_ADC_GAS_RES_SHIFT; - - *val = bme680_compensate_gas(data, adc_gas_res, gas_range); - return IIO_VAL_INT; + gas_range = FIELD_GET(BME680_GAS_RANGE_MASK, gas_regs_val); + *comp_gas_res = bme680_compensate_gas(data, adc_gas_res, gas_range); + return 0; } -static int bme680_read_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, - int *val, int *val2, long mask) +static int __bme680_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) { struct bme680_data *data = iio_priv(indio_dev); + int chan_val, ret; + s16 temp_chan_val; + + guard(mutex)(&data->lock); + + ret = bme680_set_mode(data, BME680_MODE_FORCED); + if (ret < 0) + return ret; + + ret = bme680_wait_for_eoc(data); + if (ret) + return ret; switch (mask) { case IIO_CHAN_INFO_PROCESSED: switch (chan->type) { case IIO_TEMP: - return bme680_read_temp(data, val); + ret = bme680_read_temp(data, &temp_chan_val); + if (ret) + return ret; + + *val = temp_chan_val * 10; + return IIO_VAL_INT; case IIO_PRESSURE: - return bme680_read_press(data, val, val2); + ret = bme680_read_press(data, &chan_val); + if (ret) + return ret; + + *val = chan_val; + *val2 = 1000; + return IIO_VAL_FRACTIONAL; case IIO_HUMIDITYRELATIVE: - return bme680_read_humid(data, val, val2); + ret = bme680_read_humid(data, &chan_val); + if (ret) + return ret; + + *val = chan_val; + *val2 = 1000; + return IIO_VAL_FRACTIONAL; case IIO_RESISTANCE: - return bme680_read_gas(data, val); + ret = bme680_read_gas(data, &chan_val); + if (ret) + return ret; + + *val = chan_val; + return IIO_VAL_INT; + default: + return -EINVAL; + } + case IIO_CHAN_INFO_RAW: + switch (chan->type) { + case IIO_TEMP: + ret = bme680_read_temp(data, &temp_chan_val); + if (ret) + return ret; + + *val = temp_chan_val; + return IIO_VAL_INT; + case IIO_PRESSURE: + ret = bme680_read_press(data, &chan_val); + if (ret) + return ret; + + *val = chan_val; + return IIO_VAL_INT; + case IIO_HUMIDITYRELATIVE: + ret = bme680_read_humid(data, &chan_val); + if (ret) + return ret; + + *val = chan_val; + return IIO_VAL_INT; + default: + return -EINVAL; + } + case IIO_CHAN_INFO_SCALE: + switch (chan->type) { + case IIO_TEMP: + *val = 10; + return IIO_VAL_INT; + case IIO_PRESSURE: + *val = 1; + *val2 = 1000; + return IIO_VAL_FRACTIONAL; + case IIO_HUMIDITYRELATIVE: + *val = 1; + *val2 = 1000; + return IIO_VAL_FRACTIONAL; default: return -EINVAL; } @@ -860,17 +937,37 @@ static int bme680_read_raw(struct iio_dev *indio_dev, } } +static int bme680_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + struct bme680_data *data = iio_priv(indio_dev); + struct device *dev = regmap_get_device(data->regmap); + int ret; + + ret = pm_runtime_resume_and_get(dev); + if (ret) + return ret; + + ret = __bme680_read_raw(indio_dev, chan, val, val2, mask); + pm_runtime_put_autosuspend(dev); + + return ret; +} + static bool bme680_is_valid_oversampling(int rate) { return (rate > 0 && rate <= 16 && is_power_of_2(rate)); } -static int bme680_write_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, - int val, int val2, long mask) +static int __bme680_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, int val2, long mask) { struct bme680_data *data = iio_priv(indio_dev); + guard(mutex)(&data->lock); + if (val2 != 0) return -EINVAL; @@ -896,11 +993,38 @@ static int bme680_write_raw(struct iio_dev *indio_dev, return bme680_chip_config(data); } + case IIO_CHAN_INFO_PROCESSED: + { + switch (chan->type) { + case IIO_CURRENT: + return bme680_preheat_curr_config(data, (u8)val); + default: + return -EINVAL; + } + } default: return -EINVAL; } } +static int bme680_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, int val2, long mask) +{ + struct bme680_data *data = iio_priv(indio_dev); + struct device *dev = regmap_get_device(data->regmap); + int ret; + + ret = pm_runtime_resume_and_get(dev); + if (ret) + return ret; + + ret = __bme680_write_raw(indio_dev, chan, val, val2, mask); + pm_runtime_put_autosuspend(dev); + + return ret; +} + static const char bme680_oversampling_ratio_show[] = "1 2 4 8 16"; static IIO_CONST_ATTR(oversampling_ratio_available, @@ -921,57 +1045,127 @@ static const struct iio_info bme680_info = { .attrs = &bme680_attribute_group, }; -static const char *bme680_match_acpi_device(struct device *dev) +static const unsigned long bme680_avail_scan_masks[] = { + BIT(BME680_GAS) | BIT(BME680_HUMID) | BIT(BME680_PRESS) | BIT(BME680_TEMP), + 0 +}; + +static irqreturn_t bme680_trigger_handler(int irq, void *p) +{ + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct bme680_data *data = iio_priv(indio_dev); + struct device *dev = regmap_get_device(data->regmap); + u32 adc_temp, adc_press, adc_humid; + u16 adc_gas_res, gas_regs_val; + u8 gas_range; + s32 t_fine; + int ret; + + guard(mutex)(&data->lock); + + ret = bme680_set_mode(data, BME680_MODE_FORCED); + if (ret < 0) + goto out; + + ret = bme680_wait_for_eoc(data); + if (ret) + goto out; + + ret = regmap_bulk_read(data->regmap, BME680_REG_MEAS_STAT_0, + data->buf, sizeof(data->buf)); + if (ret) { + dev_err(dev, "failed to burst read sensor data\n"); + goto out; + } + if (data->buf[0] & BME680_GAS_MEAS_BIT) { + dev_err(dev, "gas measurement incomplete\n"); + goto out; + } + + /* Temperature calculations */ + adc_temp = FIELD_GET(BME680_MEAS_TRIM_MASK, get_unaligned_be24(&data->buf[5])); + if (adc_temp == BME680_MEAS_SKIPPED) { + dev_err(dev, "reading temperature skipped\n"); + goto out; + } + data->scan.chan[0] = bme680_compensate_temp(data, adc_temp); + t_fine = bme680_calc_t_fine(data, adc_temp); + + /* Pressure calculations */ + adc_press = FIELD_GET(BME680_MEAS_TRIM_MASK, get_unaligned_be24(&data->buf[2])); + if (adc_press == BME680_MEAS_SKIPPED) { + dev_err(dev, "reading pressure skipped\n"); + goto out; + } + data->scan.chan[1] = bme680_compensate_press(data, adc_press, t_fine); + + /* Humidity calculations */ + adc_humid = get_unaligned_be16(&data->buf[8]); + if (adc_humid == BME680_MEAS_SKIPPED) { + dev_err(dev, "reading humidity skipped\n"); + goto out; + } + data->scan.chan[2] = bme680_compensate_humid(data, adc_humid, t_fine); + + /* Gas calculations */ + gas_regs_val = get_unaligned_be16(&data->buf[13]); + adc_gas_res = FIELD_GET(BME680_ADC_GAS_RES, gas_regs_val); + if ((gas_regs_val & BME680_GAS_STAB_BIT) == 0) { + dev_err(dev, "heater failed to reach the target temperature\n"); + goto out; + } + gas_range = FIELD_GET(BME680_GAS_RANGE_MASK, gas_regs_val); + data->scan.chan[3] = bme680_compensate_gas(data, adc_gas_res, gas_range); + + iio_push_to_buffers_with_ts(indio_dev, &data->scan, sizeof(data->scan), + iio_get_time_ns(indio_dev)); +out: + iio_trigger_notify_done(indio_dev->trig); + return IRQ_HANDLED; +} + +static int bme680_buffer_preenable(struct iio_dev *indio_dev) { - const struct acpi_device_id *id; + struct bme680_data *data = iio_priv(indio_dev); + struct device *dev = regmap_get_device(data->regmap); + + return pm_runtime_resume_and_get(dev); +} - id = acpi_match_device(dev->driver->acpi_match_table, dev); - if (!id) - return NULL; +static int bme680_buffer_postdisable(struct iio_dev *indio_dev) +{ + struct bme680_data *data = iio_priv(indio_dev); + struct device *dev = regmap_get_device(data->regmap); - return dev_name(dev); + pm_runtime_put_autosuspend(dev); + return 0; } +static const struct iio_buffer_setup_ops bme680_buffer_setup_ops = { + .preenable = bme680_buffer_preenable, + .postdisable = bme680_buffer_postdisable, +}; + int bme680_core_probe(struct device *dev, struct regmap *regmap, const char *name) { struct iio_dev *indio_dev; struct bme680_data *data; - unsigned int val; int ret; - ret = regmap_write(regmap, BME680_REG_SOFT_RESET, - BME680_CMD_SOFTRESET); - if (ret < 0) { - dev_err(dev, "Failed to reset chip\n"); - return ret; - } - - ret = regmap_read(regmap, BME680_REG_CHIP_ID, &val); - if (ret < 0) { - dev_err(dev, "Error reading chip ID\n"); - return ret; - } - - if (val != BME680_CHIP_ID_VAL) { - dev_err(dev, "Wrong chip ID, got %x expected %x\n", - val, BME680_CHIP_ID_VAL); - return -ENODEV; - } - indio_dev = devm_iio_device_alloc(dev, sizeof(*data)); if (!indio_dev) return -ENOMEM; - if (!name && ACPI_HANDLE(dev)) - name = bme680_match_acpi_device(dev); - data = iio_priv(indio_dev); + mutex_init(&data->lock); dev_set_drvdata(dev, indio_dev); data->regmap = regmap; indio_dev->name = name; indio_dev->channels = bme680_channels; indio_dev->num_channels = ARRAY_SIZE(bme680_channels); + indio_dev->available_scan_masks = bme680_avail_scan_masks; indio_dev->info = &bme680_info; indio_dev->modes = INDIO_DIRECT_MODE; @@ -981,29 +1175,91 @@ int bme680_core_probe(struct device *dev, struct regmap *regmap, data->oversampling_temp = 8; /* 8X oversampling rate */ data->heater_temp = 320; /* degree Celsius */ data->heater_dur = 150; /* milliseconds */ + data->preheat_curr_mA = 0; - ret = bme680_chip_config(data); - if (ret < 0) { - dev_err(dev, "failed to set chip_config data\n"); - return ret; - } + ret = devm_regulator_bulk_get_enable(dev, ARRAY_SIZE(bme680_supply_names), + bme680_supply_names); + if (ret) + return dev_err_probe(dev, ret, + "failed to get and enable supplies.\n"); - ret = bme680_gas_config(data); - if (ret < 0) { - dev_err(dev, "failed to set gas config data\n"); - return ret; + fsleep(BME680_STARTUP_TIME_US); + + ret = regmap_write(regmap, BME680_REG_SOFT_RESET, BME680_CMD_SOFTRESET); + if (ret < 0) + return dev_err_probe(dev, ret, "Failed to reset chip\n"); + + fsleep(BME680_STARTUP_TIME_US); + + ret = regmap_read(regmap, BME680_REG_CHIP_ID, &data->check); + if (ret < 0) + return dev_err_probe(dev, ret, "Error reading chip ID\n"); + + if (data->check != BME680_CHIP_ID_VAL) { + dev_err(dev, "Wrong chip ID, got %x expected %x\n", + data->check, BME680_CHIP_ID_VAL); + return -ENODEV; } ret = bme680_read_calib(data, &data->bme680); if (ret < 0) { - dev_err(dev, + return dev_err_probe(dev, ret, "failed to read calibration coefficients at probe\n"); - return ret; } + ret = bme680_chip_config(data); + if (ret < 0) + return dev_err_probe(dev, ret, + "failed to set chip_config data\n"); + + ret = bme680_gas_config(data); + if (ret < 0) + return dev_err_probe(dev, ret, + "failed to set gas config data\n"); + + ret = devm_iio_triggered_buffer_setup(dev, indio_dev, + iio_pollfunc_store_time, + bme680_trigger_handler, + &bme680_buffer_setup_ops); + if (ret) + return dev_err_probe(dev, ret, + "iio triggered buffer setup failed\n"); + + /* Enable runtime PM */ + pm_runtime_set_autosuspend_delay(dev, BME680_STARTUP_TIME_US); + pm_runtime_use_autosuspend(dev); + pm_runtime_set_active(dev); + ret = devm_pm_runtime_enable(dev); + if (ret) + return ret; + return devm_iio_device_register(dev, indio_dev); } -EXPORT_SYMBOL_NS_GPL(bme680_core_probe, IIO_BME680); +EXPORT_SYMBOL_NS_GPL(bme680_core_probe, "IIO_BME680"); + +static int bme680_runtime_suspend(struct device *dev) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct bme680_data *data = iio_priv(indio_dev); + + return bme680_set_mode(data, BME680_MODE_SLEEP); +} + +static int bme680_runtime_resume(struct device *dev) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct bme680_data *data = iio_priv(indio_dev); + int ret; + + ret = bme680_chip_config(data); + if (ret) + return ret; + + return bme680_gas_config(data); +} + +EXPORT_RUNTIME_DEV_PM_OPS(bme680_dev_pm_ops, bme680_runtime_suspend, + bme680_runtime_resume, NULL); MODULE_AUTHOR("Himanshu Jha <himanshujha199640@gmail.com>"); MODULE_DESCRIPTION("Bosch BME680 Driver"); |