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-rw-r--r--drivers/iio/chemical/Kconfig24
-rw-r--r--drivers/iio/chemical/Makefile3
-rw-r--r--drivers/iio/chemical/ams-iaq-core.c4
-rw-r--r--drivers/iio/chemical/bme680.h54
-rw-r--r--drivers/iio/chemical/bme680_core.c1115
-rw-r--r--drivers/iio/chemical/bme680_i2c.c7
-rw-r--r--drivers/iio/chemical/bme680_spi.c5
-rw-r--r--drivers/iio/chemical/ccs811.c4
-rw-r--r--drivers/iio/chemical/ens160.h10
-rw-r--r--drivers/iio/chemical/ens160_core.c367
-rw-r--r--drivers/iio/chemical/ens160_i2c.c62
-rw-r--r--drivers/iio/chemical/ens160_spi.c61
-rw-r--r--drivers/iio/chemical/pms7003.c6
-rw-r--r--drivers/iio/chemical/scd30_core.c4
-rw-r--r--drivers/iio/chemical/scd30_i2c.c4
-rw-r--r--drivers/iio/chemical/scd30_serial.c8
-rw-r--r--drivers/iio/chemical/scd4x.c4
-rw-r--r--drivers/iio/chemical/sgp40.c11
-rw-r--r--drivers/iio/chemical/sps30.c2
-rw-r--r--drivers/iio/chemical/sps30_i2c.c4
-rw-r--r--drivers/iio/chemical/sps30_serial.c6
21 files changed, 1301 insertions, 464 deletions
diff --git a/drivers/iio/chemical/Kconfig b/drivers/iio/chemical/Kconfig
index 02649ab81b3c..330fe0af946f 100644
--- a/drivers/iio/chemical/Kconfig
+++ b/drivers/iio/chemical/Kconfig
@@ -50,6 +50,8 @@ config BME680
select REGMAP
select BME680_I2C if I2C
select BME680_SPI if SPI
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
help
Say yes here to build support for Bosch Sensortec BME680 sensor with
temperature, pressure, humidity and gas sensing capability.
@@ -76,6 +78,28 @@ config CCS811
Say Y here to build I2C interface support for the AMS
CCS811 VOC (Volatile Organic Compounds) sensor
+config ENS160
+ tristate "ScioSense ENS160 sensor driver"
+ depends on (I2C || SPI)
+ select REGMAP
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ select ENS160_I2C if I2C
+ select ENS160_SPI if SPI
+ help
+ Say yes here to build support for ScioSense ENS160 multi-gas sensor.
+
+ This driver can also be built as a module. If so, the module for I2C
+ would be called ens160_i2c and ens160_spi for SPI support.
+
+config ENS160_I2C
+ tristate
+ select REGMAP_I2C
+
+config ENS160_SPI
+ tristate
+ select REGMAP_SPI
+
config IAQCORE
tristate "AMS iAQ-Core VOC sensors"
depends on I2C
diff --git a/drivers/iio/chemical/Makefile b/drivers/iio/chemical/Makefile
index 2f3dee8bb779..4866db06bdc9 100644
--- a/drivers/iio/chemical/Makefile
+++ b/drivers/iio/chemical/Makefile
@@ -11,6 +11,9 @@ obj-$(CONFIG_BME680) += bme680_core.o
obj-$(CONFIG_BME680_I2C) += bme680_i2c.o
obj-$(CONFIG_BME680_SPI) += bme680_spi.o
obj-$(CONFIG_CCS811) += ccs811.o
+obj-$(CONFIG_ENS160) += ens160_core.o
+obj-$(CONFIG_ENS160_I2C) += ens160_i2c.o
+obj-$(CONFIG_ENS160_SPI) += ens160_spi.o
obj-$(CONFIG_IAQCORE) += ams-iaq-core.o
obj-$(CONFIG_PMS7003) += pms7003.o
obj-$(CONFIG_SCD30_CORE) += scd30_core.o
diff --git a/drivers/iio/chemical/ams-iaq-core.c b/drivers/iio/chemical/ams-iaq-core.c
index 164facac5db6..10156d794092 100644
--- a/drivers/iio/chemical/ams-iaq-core.c
+++ b/drivers/iio/chemical/ams-iaq-core.c
@@ -24,7 +24,7 @@ struct ams_iaqcore_reading {
u8 status;
__be32 resistance;
__be16 voc_ppb;
-} __attribute__((__packed__));
+} __packed;
struct ams_iaqcore_data {
struct i2c_client *client;
@@ -163,7 +163,7 @@ static int ams_iaqcore_probe(struct i2c_client *client)
}
static const struct i2c_device_id ams_iaqcore_id[] = {
- { "ams-iaq-core", 0 },
+ { "ams-iaq-core" },
{ }
};
MODULE_DEVICE_TABLE(i2c, ams_iaqcore_id);
diff --git a/drivers/iio/chemical/bme680.h b/drivers/iio/chemical/bme680.h
index 4edc5d21cb9f..7d86ed8b02e6 100644
--- a/drivers/iio/chemical/bme680.h
+++ b/drivers/iio/chemical/bme680.h
@@ -2,6 +2,9 @@
#ifndef BME680_H_
#define BME680_H_
+#include <linux/pm.h>
+#include <linux/regmap.h>
+
#define BME680_REG_CHIP_ID 0xD0
#define BME680_CHIP_ID_VAL 0x61
#define BME680_REG_SOFT_RESET 0xE0
@@ -12,7 +15,7 @@
#define BME680_REG_TEMP_MSB 0x22
#define BME680_REG_PRESS_MSB 0x1F
-#define BM6880_REG_HUMIDITY_MSB 0x25
+#define BME680_REG_HUMIDITY_MSB 0x25
#define BME680_REG_GAS_MSB 0x2A
#define BME680_REG_GAS_R_LSB 0x2B
#define BME680_GAS_STAB_BIT BIT(4)
@@ -25,8 +28,6 @@
#define BME680_OSRS_TEMP_MASK GENMASK(7, 5)
#define BME680_OSRS_PRESS_MASK GENMASK(4, 2)
#define BME680_MODE_MASK GENMASK(1, 0)
-#define BME680_MODE_FORCED 1
-#define BME680_MODE_SLEEP 0
#define BME680_REG_CONFIG 0x75
#define BME680_FILTER_MASK GENMASK(4, 2)
@@ -39,14 +40,13 @@
#define BME680_HUM_REG_SHIFT_VAL 4
#define BME680_BIT_H1_DATA_MASK GENMASK(3, 0)
-#define BME680_REG_RES_HEAT_RANGE 0x02
#define BME680_RHRANGE_MASK GENMASK(5, 4)
#define BME680_REG_RES_HEAT_VAL 0x00
-#define BME680_REG_RANGE_SW_ERR 0x04
#define BME680_RSERROR_MASK GENMASK(7, 4)
+#define BME680_REG_IDAC_HEAT_0 0x50
#define BME680_REG_RES_HEAT_0 0x5A
#define BME680_REG_GAS_WAIT_0 0x64
-#define BME680_ADC_GAS_RES_SHIFT 6
+#define BME680_ADC_GAS_RES GENMASK(15, 6)
#define BME680_AMB_TEMP 25
#define BME680_REG_CTRL_GAS_1 0x71
@@ -54,36 +54,34 @@
#define BME680_NB_CONV_MASK GENMASK(3, 0)
#define BME680_REG_MEAS_STAT_0 0x1D
+#define BME680_NEW_DATA_BIT BIT(7)
#define BME680_GAS_MEAS_BIT BIT(6)
+#define BME680_MEAS_BIT BIT(5)
+
+#define BME680_TEMP_NUM_BYTES 3
+#define BME680_PRESS_NUM_BYTES 3
+#define BME680_HUMID_NUM_BYTES 2
+#define BME680_GAS_NUM_BYTES 2
+
+#define BME680_MEAS_TRIM_MASK GENMASK(24, 4)
+
+/* Datasheet Section 1.1, Table 1 */
+#define BME680_STARTUP_TIME_US 2000
+
+#define BME680_NUM_CHANNELS 4
+#define BME680_NUM_BULK_READ_REGS 15
/* Calibration Parameters */
#define BME680_T2_LSB_REG 0x8A
-#define BME680_T3_REG 0x8C
-#define BME680_P1_LSB_REG 0x8E
-#define BME680_P2_LSB_REG 0x90
-#define BME680_P3_REG 0x92
-#define BME680_P4_LSB_REG 0x94
-#define BME680_P5_LSB_REG 0x96
-#define BME680_P7_REG 0x98
-#define BME680_P6_REG 0x99
-#define BME680_P8_LSB_REG 0x9C
-#define BME680_P9_LSB_REG 0x9E
-#define BME680_P10_REG 0xA0
-#define BME680_H2_LSB_REG 0xE2
#define BME680_H2_MSB_REG 0xE1
-#define BME680_H1_MSB_REG 0xE3
-#define BME680_H1_LSB_REG 0xE2
-#define BME680_H3_REG 0xE4
-#define BME680_H4_REG 0xE5
-#define BME680_H5_REG 0xE6
-#define BME680_H6_REG 0xE7
-#define BME680_H7_REG 0xE8
-#define BME680_T1_LSB_REG 0xE9
-#define BME680_GH2_LSB_REG 0xEB
-#define BME680_GH1_REG 0xED
#define BME680_GH3_REG 0xEE
+#define BME680_CALIB_RANGE_1_LEN 23
+#define BME680_CALIB_RANGE_2_LEN 14
+#define BME680_CALIB_RANGE_3_LEN 5
+
extern const struct regmap_config bme680_regmap_config;
+extern const struct dev_pm_ops bme680_dev_pm_ops;
int bme680_core_probe(struct device *dev, struct regmap *regmap,
const char *name);
diff --git a/drivers/iio/chemical/bme680_core.c b/drivers/iio/chemical/bme680_core.c
index ef5e0e46fd34..9d73fd2cf52c 100644
--- a/drivers/iio/chemical/bme680_core.c
+++ b/drivers/iio/chemical/bme680_core.c
@@ -8,17 +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;
@@ -38,7 +91,7 @@ struct bme680_calib {
s8 par_h3;
s8 par_h4;
s8 par_h5;
- s8 par_h6;
+ u8 par_h6;
s8 par_h7;
s8 par_gh1;
s16 par_gh2;
@@ -48,19 +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[] = {
@@ -81,27 +160,71 @@ const struct regmap_config bme680_regmap_config = {
.volatile_table = &bme680_volatile_table,
.cache_type = REGCACHE_RBTREE,
};
-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,
},
};
@@ -109,217 +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));
- if (ret < 0) {
- dev_err(dev, "failed to read BME680_T2_LSB_REG\n");
- return ret;
- }
- calib->par_t2 = le16_to_cpu(buf);
-
- ret = regmap_read(data->regmap, BME680_T3_REG, &tmp);
- if (ret < 0) {
- dev_err(dev, "failed to read BME680_T3_REG\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);
+ data->bme680_cal_buf_1,
+ sizeof(data->bme680_cal_buf_1));
if (ret < 0) {
- dev_err(dev, "failed to read BME680_P3_REG\n");
+ dev_err(dev, "failed to read 1st set of calib data;\n");
return ret;
}
- calib->par_p3 = tmp;
- ret = regmap_bulk_read(data->regmap, BME680_P4_LSB_REG,
- &buf, sizeof(buf));
+ 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_P4_LSB_REG\n");
+ dev_err(dev, "failed to read 2nd set of calib data;\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);
+ 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_H3_REG\n");
+ dev_err(dev, "failed to read 3rd set of calib data;\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;
+ calib->res_heat_val = data->bme680_cal_buf_3[RES_HEAT_VAL];
- ret = regmap_read(data->regmap, BME680_H5_REG, &tmp);
- if (ret < 0) {
- dev_err(dev, "failed to read BME680_H5_REG\n");
- return ret;
- }
- calib->par_h5 = tmp;
+ calib->res_heat_range = FIELD_GET(BME680_RHRANGE_MASK,
+ data->bme680_cal_buf_3[RES_HEAT_RANGE]);
- 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->range_sw_err = FIELD_GET(BME680_RSERROR_MASK,
+ data->bme680_cal_buf_3[RANGE_SW_ERR]);
- /* 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;
-
- 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);
-
- 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;
}
@@ -331,25 +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) - (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 * (calib->par_t3 << 4)) >> 14;
- data->t_fine = var2 + var3;
- calc_temp = (data->t_fine * 5 + 128) >> 8;
+ var3 = (var3 * ((s32)calib->par_t3 << 4)) >> 14;
+ 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;
}
/*
@@ -360,17 +404,17 @@ 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) + (calib->par_p4 << 16);
+ var2 = (var2 >> 2) + ((s32)calib->par_p4 << 16);
var1 = (((((var1 >> 2) * (var1 >> 2)) >> 13) *
- (calib->par_p3 << 5)) >> 3) +
+ ((s32)calib->par_p3 << 5)) >> 3) +
((calib->par_p2 * var1) >> 1);
var1 = var1 >> 18;
var1 = ((32768 + var1) * calib->par_p1) >> 15;
@@ -388,11 +432,35 @@ static u32 bme680_compensate_press(struct bme680_data *data,
var3 = ((press_comp >> 8) * (press_comp >> 8) *
(press_comp >> 8) * calib->par_p10) >> 17;
- press_comp += (var1 + var2 + var3 + (calib->par_p7 << 7)) >> 4;
+ press_comp += (var1 + var2 + var3 + ((s32)calib->par_p7 << 7)) >> 4;
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
@@ -401,20 +469,20 @@ 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;
var3 = var1 * var2;
- var4 = calib->par_h6 << 7;
+ var4 = (s32)calib->par_h6 << 7;
var4 = (var4 + ((temp_scaled * calib->par_h7) / 100)) >> 4;
var5 = ((var3 >> 14) * (var3 >> 14)) >> 10;
var6 = (var4 * var5) >> 1;
@@ -441,19 +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;
}
@@ -471,7 +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);
@@ -505,23 +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;
@@ -532,15 +599,50 @@ static u8 bme680_oversampling_to_reg(u8 val)
return ilog2(val) + 1;
}
+/*
+ * Taken from Bosch BME680 API:
+ * https://github.com/boschsensortec/BME68x_SensorAPI/blob/v4.4.8/bme68x.c#L490
+ */
+static int bme680_wait_for_eoc(struct bme680_data *data)
+{
+ struct device *dev = regmap_get_device(data->regmap);
+ int ret;
+ /*
+ * (Sum of oversampling ratios * time per oversampling) +
+ * TPH measurement + gas measurement + wait transition from forced mode
+ * + heater duration
+ */
+ int wait_eoc_us = ((data->oversampling_temp + data->oversampling_press +
+ data->oversampling_humid) * 1936) + (477 * 4) +
+ (477 * 5) + 1000 + (data->heater_dur * 1000);
+
+ fsleep(wait_eoc_us);
+
+ 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 (data->check & BME680_MEAS_BIT) {
+ dev_err(dev, "Device measurement cycle incomplete.\n");
+ return -EBUSY;
+ }
+ if (!(data->check & BME680_NEW_DATA_BIT)) {
+ dev_err(dev, "No new data available from the device.\n");
+ return -ENODATA;
+ }
+
+ return 0;
+}
+
static int bme680_chip_config(struct bme680_data *data)
{
struct device *dev = regmap_get_device(data->regmap);
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.
@@ -554,8 +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;
@@ -568,8 +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;
}
@@ -580,6 +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 */
@@ -598,6 +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,
@@ -609,189 +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;
+ u32 adc_temp;
- /* set forced mode to trigger measurement */
- ret = bme680_set_mode(data, true);
- if (ret < 0)
+ 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 = 100;
- 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 = 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;
}
@@ -814,17 +937,38 @@ 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_mark_last_busy(dev);
+ 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;
@@ -850,11 +994,39 @@ 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_mark_last_busy(dev);
+ 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,
@@ -875,57 +1047,128 @@ 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)
{
- const struct acpi_device_id *id;
+ 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;
- id = acpi_match_device(dev->driver->acpi_match_table, dev);
- if (!id)
- return NULL;
+ 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_timestamp(indio_dev, &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)
+{
+ struct bme680_data *data = iio_priv(indio_dev);
+ struct device *dev = regmap_get_device(data->regmap);
+
+ return pm_runtime_resume_and_get(dev);
+}
+
+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_mark_last_busy(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;
@@ -935,29 +1178,91 @@ 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");
diff --git a/drivers/iio/chemical/bme680_i2c.c b/drivers/iio/chemical/bme680_i2c.c
index 1c7076cf91ca..ac7763f98a6a 100644
--- a/drivers/iio/chemical/bme680_i2c.c
+++ b/drivers/iio/chemical/bme680_i2c.c
@@ -36,8 +36,8 @@ static int bme680_i2c_probe(struct i2c_client *client)
}
static const struct i2c_device_id bme680_i2c_id[] = {
- {"bme680", 0},
- {},
+ { "bme680" },
+ {}
};
MODULE_DEVICE_TABLE(i2c, bme680_i2c_id);
@@ -51,6 +51,7 @@ static struct i2c_driver bme680_i2c_driver = {
.driver = {
.name = "bme680_i2c",
.of_match_table = bme680_of_i2c_match,
+ .pm = pm_ptr(&bme680_dev_pm_ops),
},
.probe = bme680_i2c_probe,
.id_table = bme680_i2c_id,
@@ -60,4 +61,4 @@ module_i2c_driver(bme680_i2c_driver);
MODULE_AUTHOR("Himanshu Jha <himanshujha199640@gmail.com>");
MODULE_DESCRIPTION("BME680 I2C driver");
MODULE_LICENSE("GPL v2");
-MODULE_IMPORT_NS(IIO_BME680);
+MODULE_IMPORT_NS("IIO_BME680");
diff --git a/drivers/iio/chemical/bme680_spi.c b/drivers/iio/chemical/bme680_spi.c
index 4404d42ae5ec..ecb24ba0ebc9 100644
--- a/drivers/iio/chemical/bme680_spi.c
+++ b/drivers/iio/chemical/bme680_spi.c
@@ -100,7 +100,7 @@ static int bme680_regmap_spi_read(void *context, const void *reg,
return spi_write_then_read(spi, &addr, 1, val, val_size);
}
-static struct regmap_bus bme680_regmap_bus = {
+static const struct regmap_bus bme680_regmap_bus = {
.write = bme680_regmap_spi_write,
.read = bme680_regmap_spi_read,
.reg_format_endian_default = REGMAP_ENDIAN_BIG,
@@ -154,6 +154,7 @@ static struct spi_driver bme680_spi_driver = {
.driver = {
.name = "bme680_spi",
.of_match_table = bme680_of_spi_match,
+ .pm = pm_ptr(&bme680_dev_pm_ops),
},
.probe = bme680_spi_probe,
.id_table = bme680_spi_id,
@@ -163,4 +164,4 @@ module_spi_driver(bme680_spi_driver);
MODULE_AUTHOR("Himanshu Jha <himanshujha199640@gmail.com>");
MODULE_DESCRIPTION("Bosch BME680 SPI driver");
MODULE_LICENSE("GPL v2");
-MODULE_IMPORT_NS(IIO_BME680);
+MODULE_IMPORT_NS("IIO_BME680");
diff --git a/drivers/iio/chemical/ccs811.c b/drivers/iio/chemical/ccs811.c
index 87741f155c32..451fb65dbe60 100644
--- a/drivers/iio/chemical/ccs811.c
+++ b/drivers/iio/chemical/ccs811.c
@@ -81,7 +81,7 @@ struct ccs811_data {
/* Ensures correct alignment of timestamp if present */
struct {
s16 channels[2];
- s64 ts __aligned(8);
+ aligned_s64 ts;
} scan;
};
@@ -551,7 +551,7 @@ static void ccs811_remove(struct i2c_client *client)
}
static const struct i2c_device_id ccs811_id[] = {
- {"ccs811", 0},
+ { "ccs811" },
{ }
};
MODULE_DEVICE_TABLE(i2c, ccs811_id);
diff --git a/drivers/iio/chemical/ens160.h b/drivers/iio/chemical/ens160.h
new file mode 100644
index 000000000000..f9f0575ce55d
--- /dev/null
+++ b/drivers/iio/chemical/ens160.h
@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef ENS160_H_
+#define ENS160_H_
+
+int devm_ens160_core_probe(struct device *dev, struct regmap *regmap, int irq,
+ const char *name);
+
+extern const struct dev_pm_ops ens160_pm_ops;
+
+#endif
diff --git a/drivers/iio/chemical/ens160_core.c b/drivers/iio/chemical/ens160_core.c
new file mode 100644
index 000000000000..48d5ad2075b6
--- /dev/null
+++ b/drivers/iio/chemical/ens160_core.c
@@ -0,0 +1,367 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * ScioSense ENS160 multi-gas sensor driver
+ *
+ * Copyright (c) 2024 Gustavo Silva <gustavograzs@gmail.com>
+ *
+ * Datasheet:
+ * https://www.sciosense.com/wp-content/uploads/2023/12/ENS160-Datasheet.pdf
+ */
+
+#include <linux/bitfield.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+#include "ens160.h"
+
+#define ENS160_PART_ID 0x160
+
+#define ENS160_BOOTING_TIME_MS 10U
+
+#define ENS160_REG_PART_ID 0x00
+
+#define ENS160_REG_OPMODE 0x10
+
+#define ENS160_REG_CONFIG 0x11
+#define ENS160_REG_CONFIG_INTEN BIT(0)
+#define ENS160_REG_CONFIG_INTDAT BIT(1)
+#define ENS160_REG_CONFIG_INT_CFG BIT(5)
+
+#define ENS160_REG_MODE_DEEP_SLEEP 0x00
+#define ENS160_REG_MODE_IDLE 0x01
+#define ENS160_REG_MODE_STANDARD 0x02
+#define ENS160_REG_MODE_RESET 0xF0
+
+#define ENS160_REG_COMMAND 0x12
+#define ENS160_REG_COMMAND_GET_APPVER 0x0E
+#define ENS160_REG_COMMAND_CLRGPR 0xCC
+
+#define ENS160_REG_TEMP_IN 0x13
+#define ENS160_REG_RH_IN 0x15
+#define ENS160_REG_DEVICE_STATUS 0x20
+#define ENS160_REG_DATA_AQI 0x21
+#define ENS160_REG_DATA_TVOC 0x22
+#define ENS160_REG_DATA_ECO2 0x24
+#define ENS160_REG_DATA_T 0x30
+#define ENS160_REG_DATA_RH 0x32
+#define ENS160_REG_GPR_READ4 0x4C
+
+#define ENS160_STATUS_VALIDITY_FLAG GENMASK(3, 2)
+
+#define ENS160_STATUS_NORMAL 0x00
+
+struct ens160_data {
+ struct regmap *regmap;
+ /* Protect reads from the sensor */
+ struct mutex mutex;
+ struct {
+ __le16 chans[2];
+ aligned_s64 timestamp;
+ } scan __aligned(IIO_DMA_MINALIGN);
+ u8 fw_version[3];
+ __le16 buf;
+};
+
+static const struct iio_chan_spec ens160_channels[] = {
+ {
+ .type = IIO_CONCENTRATION,
+ .channel2 = IIO_MOD_VOC,
+ .modified = 1,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ .address = ENS160_REG_DATA_TVOC,
+ .scan_index = 0,
+ .scan_type = {
+ .sign = 'u',
+ .realbits = 16,
+ .storagebits = 16,
+ .endianness = IIO_LE,
+ },
+ },
+ {
+ .type = IIO_CONCENTRATION,
+ .channel2 = IIO_MOD_CO2,
+ .modified = 1,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ .address = ENS160_REG_DATA_ECO2,
+ .scan_index = 1,
+ .scan_type = {
+ .sign = 'u',
+ .realbits = 16,
+ .storagebits = 16,
+ .endianness = IIO_LE,
+ },
+ },
+ IIO_CHAN_SOFT_TIMESTAMP(2),
+};
+
+static int ens160_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct ens160_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ iio_device_claim_direct_scoped(return -EBUSY, indio_dev) {
+ guard(mutex)(&data->mutex);
+ ret = regmap_bulk_read(data->regmap, chan->address,
+ &data->buf, sizeof(data->buf));
+ if (ret)
+ return ret;
+ *val = le16_to_cpu(data->buf);
+ return IIO_VAL_INT;
+ }
+ unreachable();
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->channel2) {
+ case IIO_MOD_CO2:
+ /* The sensor reads CO2 data as ppm */
+ *val = 0;
+ *val2 = 100;
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_MOD_VOC:
+ /* The sensor reads VOC data as ppb */
+ *val = 0;
+ *val2 = 100;
+ return IIO_VAL_INT_PLUS_NANO;
+ default:
+ return -EINVAL;
+ }
+ default:
+ return -EINVAL;
+ }
+}
+
+static int ens160_set_mode(struct ens160_data *data, u8 mode)
+{
+ int ret;
+
+ ret = regmap_write(data->regmap, ENS160_REG_OPMODE, mode);
+ if (ret)
+ return ret;
+
+ msleep(ENS160_BOOTING_TIME_MS);
+
+ return 0;
+}
+
+static void ens160_set_idle(void *data)
+{
+ ens160_set_mode(data, ENS160_REG_MODE_IDLE);
+}
+
+static int ens160_chip_init(struct ens160_data *data)
+{
+ struct device *dev = regmap_get_device(data->regmap);
+ unsigned int status;
+ int ret;
+
+ ret = ens160_set_mode(data, ENS160_REG_MODE_RESET);
+ if (ret)
+ return ret;
+
+ ret = regmap_bulk_read(data->regmap, ENS160_REG_PART_ID, &data->buf,
+ sizeof(data->buf));
+ if (ret)
+ return ret;
+
+ if (le16_to_cpu(data->buf) != ENS160_PART_ID)
+ return -ENODEV;
+
+ ret = ens160_set_mode(data, ENS160_REG_MODE_IDLE);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(data->regmap, ENS160_REG_COMMAND,
+ ENS160_REG_COMMAND_CLRGPR);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(data->regmap, ENS160_REG_COMMAND,
+ ENS160_REG_COMMAND_GET_APPVER);
+ if (ret)
+ return ret;
+
+ ret = regmap_bulk_read(data->regmap, ENS160_REG_GPR_READ4,
+ data->fw_version, sizeof(data->fw_version));
+ if (ret)
+ return ret;
+
+ dev_info(dev, "firmware version: %u.%u.%u\n", data->fw_version[2],
+ data->fw_version[1], data->fw_version[0]);
+
+ ret = ens160_set_mode(data, ENS160_REG_MODE_STANDARD);
+ if (ret)
+ return ret;
+
+ ret = devm_add_action_or_reset(dev, ens160_set_idle, data);
+ if (ret)
+ return ret;
+
+ ret = regmap_read(data->regmap, ENS160_REG_DEVICE_STATUS, &status);
+ if (ret)
+ return ret;
+
+ if (FIELD_GET(ENS160_STATUS_VALIDITY_FLAG, status)
+ != ENS160_STATUS_NORMAL)
+ return -EINVAL;
+
+ return 0;
+}
+
+static const struct iio_info ens160_info = {
+ .read_raw = ens160_read_raw,
+};
+
+static int ens160_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct ens160_data *data = iio_priv(indio_dev);
+
+ return ens160_set_mode(data, ENS160_REG_MODE_DEEP_SLEEP);
+}
+
+static int ens160_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct ens160_data *data = iio_priv(indio_dev);
+ int ret;
+
+ ret = ens160_set_mode(data, ENS160_REG_MODE_IDLE);
+ if (ret)
+ return ret;
+
+ return ens160_set_mode(data, ENS160_REG_MODE_STANDARD);
+}
+EXPORT_NS_SIMPLE_DEV_PM_OPS(ens160_pm_ops, ens160_suspend, ens160_resume,
+ IIO_ENS160);
+
+static irqreturn_t ens160_trigger_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct ens160_data *data = iio_priv(indio_dev);
+ int ret;
+
+ guard(mutex)(&data->mutex);
+
+ ret = regmap_bulk_read(data->regmap, ENS160_REG_DATA_TVOC,
+ data->scan.chans, sizeof(data->scan.chans));
+ if (ret)
+ goto err;
+
+ iio_push_to_buffers_with_timestamp(indio_dev, &data->scan,
+ pf->timestamp);
+err:
+ iio_trigger_notify_done(indio_dev->trig);
+
+ return IRQ_HANDLED;
+}
+
+static int ens160_set_trigger_state(struct iio_trigger *trig, bool state)
+{
+ struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
+ struct ens160_data *data = iio_priv(indio_dev);
+ unsigned int int_bits = ENS160_REG_CONFIG_INTEN |
+ ENS160_REG_CONFIG_INTDAT |
+ ENS160_REG_CONFIG_INT_CFG;
+
+ if (state)
+ return regmap_set_bits(data->regmap, ENS160_REG_CONFIG,
+ int_bits);
+ else
+ return regmap_clear_bits(data->regmap, ENS160_REG_CONFIG,
+ int_bits);
+}
+
+static const struct iio_trigger_ops ens160_trigger_ops = {
+ .set_trigger_state = ens160_set_trigger_state,
+ .validate_device = iio_trigger_validate_own_device,
+};
+
+static int ens160_setup_trigger(struct iio_dev *indio_dev, int irq)
+{
+ struct device *dev = indio_dev->dev.parent;
+ struct iio_trigger *trig;
+ int ret;
+
+ trig = devm_iio_trigger_alloc(dev, "%s-dev%d", indio_dev->name,
+ iio_device_id(indio_dev));
+ if (!trig)
+ return dev_err_probe(dev, -ENOMEM,
+ "failed to allocate trigger\n");
+
+ trig->ops = &ens160_trigger_ops;
+ iio_trigger_set_drvdata(trig, indio_dev);
+
+ ret = devm_iio_trigger_register(dev, trig);
+ if (ret)
+ return ret;
+
+ indio_dev->trig = iio_trigger_get(trig);
+
+ ret = devm_request_threaded_irq(dev, irq,
+ iio_trigger_generic_data_rdy_poll,
+ NULL,
+ IRQF_ONESHOT,
+ indio_dev->name,
+ indio_dev->trig);
+ if (ret)
+ return dev_err_probe(dev, ret, "failed to request irq\n");
+
+ return 0;
+}
+
+int devm_ens160_core_probe(struct device *dev, struct regmap *regmap, int irq,
+ const char *name)
+{
+ struct ens160_data *data;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+ data->regmap = regmap;
+
+ indio_dev->name = name;
+ indio_dev->info = &ens160_info;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->channels = ens160_channels;
+ indio_dev->num_channels = ARRAY_SIZE(ens160_channels);
+
+ if (irq > 0) {
+ ret = ens160_setup_trigger(indio_dev, irq);
+ if (ret)
+ return dev_err_probe(dev, ret,
+ "failed to setup trigger\n");
+ }
+
+ ret = ens160_chip_init(data);
+ if (ret)
+ return dev_err_probe(dev, ret, "chip initialization failed\n");
+
+ mutex_init(&data->mutex);
+
+ ret = devm_iio_triggered_buffer_setup(dev, indio_dev,
+ iio_pollfunc_store_time,
+ ens160_trigger_handler, NULL);
+ if (ret)
+ return ret;
+
+ return devm_iio_device_register(dev, indio_dev);
+}
+EXPORT_SYMBOL_NS(devm_ens160_core_probe, "IIO_ENS160");
+
+MODULE_AUTHOR("Gustavo Silva <gustavograzs@gmail.com>");
+MODULE_DESCRIPTION("ScioSense ENS160 driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/chemical/ens160_i2c.c b/drivers/iio/chemical/ens160_i2c.c
new file mode 100644
index 000000000000..aa0dfe639245
--- /dev/null
+++ b/drivers/iio/chemical/ens160_i2c.c
@@ -0,0 +1,62 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * ScioSense ENS160 multi-gas sensor I2C driver
+ *
+ * Copyright (c) 2024 Gustavo Silva <gustavograzs@gmail.com>
+ *
+ * 7-Bit I2C slave address is:
+ * - 0x52 if ADDR pin LOW
+ * - 0x53 if ADDR pin HIGH
+ */
+
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+#include "ens160.h"
+
+static const struct regmap_config ens160_regmap_i2c_conf = {
+ .reg_bits = 8,
+ .val_bits = 8,
+};
+
+static int ens160_i2c_probe(struct i2c_client *client)
+{
+ struct regmap *regmap;
+
+ regmap = devm_regmap_init_i2c(client, &ens160_regmap_i2c_conf);
+ if (IS_ERR(regmap))
+ return dev_err_probe(&client->dev, PTR_ERR(regmap),
+ "Failed to register i2c regmap\n");
+
+ return devm_ens160_core_probe(&client->dev, regmap, client->irq,
+ "ens160");
+}
+
+static const struct i2c_device_id ens160_i2c_id[] = {
+ { "ens160" },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, ens160_i2c_id);
+
+static const struct of_device_id ens160_of_i2c_match[] = {
+ { .compatible = "sciosense,ens160" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, ens160_of_i2c_match);
+
+static struct i2c_driver ens160_i2c_driver = {
+ .driver = {
+ .name = "ens160",
+ .of_match_table = ens160_of_i2c_match,
+ .pm = pm_sleep_ptr(&ens160_pm_ops),
+ },
+ .probe = ens160_i2c_probe,
+ .id_table = ens160_i2c_id,
+};
+module_i2c_driver(ens160_i2c_driver);
+
+MODULE_AUTHOR("Gustavo Silva <gustavograzs@gmail.com>");
+MODULE_DESCRIPTION("ScioSense ENS160 I2C driver");
+MODULE_LICENSE("GPL v2");
+MODULE_IMPORT_NS("IIO_ENS160");
diff --git a/drivers/iio/chemical/ens160_spi.c b/drivers/iio/chemical/ens160_spi.c
new file mode 100644
index 000000000000..a674c0e1bf4b
--- /dev/null
+++ b/drivers/iio/chemical/ens160_spi.c
@@ -0,0 +1,61 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * ScioSense ENS160 multi-gas sensor SPI driver
+ *
+ * Copyright (c) 2024 Gustavo Silva <gustavograzs@gmail.com>
+ */
+
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/spi/spi.h>
+
+#include "ens160.h"
+
+#define ENS160_SPI_READ BIT(0)
+
+static const struct regmap_config ens160_regmap_spi_conf = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .reg_shift = -1,
+ .read_flag_mask = ENS160_SPI_READ,
+};
+
+static int ens160_spi_probe(struct spi_device *spi)
+{
+ struct regmap *regmap;
+
+ regmap = devm_regmap_init_spi(spi, &ens160_regmap_spi_conf);
+ if (IS_ERR(regmap))
+ return dev_err_probe(&spi->dev, PTR_ERR(regmap),
+ "Failed to register spi regmap\n");
+
+ return devm_ens160_core_probe(&spi->dev, regmap, spi->irq, "ens160");
+}
+
+static const struct of_device_id ens160_spi_of_match[] = {
+ { .compatible = "sciosense,ens160" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, ens160_spi_of_match);
+
+static const struct spi_device_id ens160_spi_id[] = {
+ { "ens160" },
+ { }
+};
+MODULE_DEVICE_TABLE(spi, ens160_spi_id);
+
+static struct spi_driver ens160_spi_driver = {
+ .driver = {
+ .name = "ens160",
+ .of_match_table = ens160_spi_of_match,
+ .pm = pm_sleep_ptr(&ens160_pm_ops),
+ },
+ .probe = ens160_spi_probe,
+ .id_table = ens160_spi_id,
+};
+module_spi_driver(ens160_spi_driver);
+
+MODULE_AUTHOR("Gustavo Silva <gustavograzs@gmail.com>");
+MODULE_DESCRIPTION("ScioSense ENS160 SPI driver");
+MODULE_LICENSE("GPL v2");
+MODULE_IMPORT_NS("IIO_ENS160");
diff --git a/drivers/iio/chemical/pms7003.c b/drivers/iio/chemical/pms7003.c
index b5cf15a515d2..d0bd94912e0a 100644
--- a/drivers/iio/chemical/pms7003.c
+++ b/drivers/iio/chemical/pms7003.c
@@ -5,7 +5,7 @@
* Copyright (c) Tomasz Duszynski <tduszyns@gmail.com>
*/
-#include <asm/unaligned.h>
+#include <linux/unaligned.h>
#include <linux/completion.h>
#include <linux/device.h>
#include <linux/errno.h>
@@ -211,8 +211,8 @@ static bool pms7003_frame_is_okay(struct pms7003_frame *frame)
return checksum == pms7003_calc_checksum(frame);
}
-static ssize_t pms7003_receive_buf(struct serdev_device *serdev, const u8 *buf,
- size_t size)
+static size_t pms7003_receive_buf(struct serdev_device *serdev, const u8 *buf,
+ size_t size)
{
struct iio_dev *indio_dev = serdev_device_get_drvdata(serdev);
struct pms7003_state *state = iio_priv(indio_dev);
diff --git a/drivers/iio/chemical/scd30_core.c b/drivers/iio/chemical/scd30_core.c
index 7be5a45cf71a..d613c54cb28d 100644
--- a/drivers/iio/chemical/scd30_core.c
+++ b/drivers/iio/chemical/scd30_core.c
@@ -594,7 +594,7 @@ static irqreturn_t scd30_trigger_handler(int irq, void *p)
struct scd30_state *state = iio_priv(indio_dev);
struct {
int data[SCD30_MEAS_COUNT];
- s64 ts __aligned(8);
+ aligned_s64 ts;
} scan;
int ret;
@@ -747,7 +747,7 @@ int scd30_probe(struct device *dev, int irq, const char *name, void *priv,
return devm_iio_device_register(dev, indio_dev);
}
-EXPORT_SYMBOL_NS(scd30_probe, IIO_SCD30);
+EXPORT_SYMBOL_NS(scd30_probe, "IIO_SCD30");
MODULE_AUTHOR("Tomasz Duszynski <tomasz.duszynski@octakon.com>");
MODULE_DESCRIPTION("Sensirion SCD30 carbon dioxide sensor core driver");
diff --git a/drivers/iio/chemical/scd30_i2c.c b/drivers/iio/chemical/scd30_i2c.c
index bd3b01ded246..436df9c61a71 100644
--- a/drivers/iio/chemical/scd30_i2c.c
+++ b/drivers/iio/chemical/scd30_i2c.c
@@ -13,7 +13,7 @@
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/types.h>
-#include <asm/unaligned.h>
+#include <linux/unaligned.h>
#include "scd30.h"
@@ -137,4 +137,4 @@ module_i2c_driver(scd30_i2c_driver);
MODULE_AUTHOR("Tomasz Duszynski <tomasz.duszynski@octakon.com>");
MODULE_DESCRIPTION("Sensirion SCD30 carbon dioxide sensor i2c driver");
MODULE_LICENSE("GPL v2");
-MODULE_IMPORT_NS(IIO_SCD30);
+MODULE_IMPORT_NS("IIO_SCD30");
diff --git a/drivers/iio/chemical/scd30_serial.c b/drivers/iio/chemical/scd30_serial.c
index a47654591e55..e8b453aae859 100644
--- a/drivers/iio/chemical/scd30_serial.c
+++ b/drivers/iio/chemical/scd30_serial.c
@@ -15,7 +15,7 @@
#include <linux/serdev.h>
#include <linux/string.h>
#include <linux/types.h>
-#include <asm/unaligned.h>
+#include <linux/unaligned.h>
#include "scd30.h"
@@ -174,8 +174,8 @@ static int scd30_serdev_command(struct scd30_state *state, enum scd30_cmd cmd, u
return 0;
}
-static ssize_t scd30_serdev_receive_buf(struct serdev_device *serdev,
- const u8 *buf, size_t size)
+static size_t scd30_serdev_receive_buf(struct serdev_device *serdev,
+ const u8 *buf, size_t size)
{
struct iio_dev *indio_dev = serdev_device_get_drvdata(serdev);
struct scd30_serdev_priv *priv;
@@ -261,4 +261,4 @@ module_serdev_device_driver(scd30_serdev_driver);
MODULE_AUTHOR("Tomasz Duszynski <tomasz.duszynski@octakon.com>");
MODULE_DESCRIPTION("Sensirion SCD30 carbon dioxide sensor serial driver");
MODULE_LICENSE("GPL v2");
-MODULE_IMPORT_NS(IIO_SCD30);
+MODULE_IMPORT_NS("IIO_SCD30");
diff --git a/drivers/iio/chemical/scd4x.c b/drivers/iio/chemical/scd4x.c
index ca6b20270711..50e3ac44422b 100644
--- a/drivers/iio/chemical/scd4x.c
+++ b/drivers/iio/chemical/scd4x.c
@@ -11,7 +11,7 @@
* https://www.sensirion.com/file/datasheet_scd4x
*/
-#include <asm/unaligned.h>
+#include <linux/unaligned.h>
#include <linux/crc8.h>
#include <linux/delay.h>
#include <linux/device.h>
@@ -665,7 +665,7 @@ static irqreturn_t scd4x_trigger_handler(int irq, void *p)
struct scd4x_state *state = iio_priv(indio_dev);
struct {
uint16_t data[3];
- int64_t ts __aligned(8);
+ aligned_s64 ts;
} scan;
int ret;
diff --git a/drivers/iio/chemical/sgp40.c b/drivers/iio/chemical/sgp40.c
index 7f0de14a1956..07d8ab830211 100644
--- a/drivers/iio/chemical/sgp40.c
+++ b/drivers/iio/chemical/sgp40.c
@@ -14,11 +14,16 @@
* 1) read raw logarithmic resistance value from sensor
* --> useful to pass it to the algorithm of the sensor vendor for
* measuring deteriorations and improvements of air quality.
+ * It can be read from the attribute in_resistance_raw.
*
- * 2) calculate an estimated absolute voc index (0 - 500 index points) for
- * measuring the air quality.
+ * 2) calculate an estimated absolute voc index (in_concentration_input)
+ * with 0 - 500 index points) for measuring the air quality.
* For this purpose the value of the resistance for which the voc index
- * will be 250 can be set up using calibbias.
+ * will be 250 can be set up using in_resistance_calibbias (default 30000).
+ *
+ * The voc index is calculated as:
+ * x = (in_resistance_raw - in_resistance_calibbias) * 0.65
+ * in_concentration_input = 500 / (1 + e^x)
*
* Compensation values of relative humidity and temperature can be set up
* by writing to the out values of temp and humidityrelative.
diff --git a/drivers/iio/chemical/sps30.c b/drivers/iio/chemical/sps30.c
index 814ce0aad1cc..6f4f2ba2c09d 100644
--- a/drivers/iio/chemical/sps30.c
+++ b/drivers/iio/chemical/sps30.c
@@ -372,7 +372,7 @@ int sps30_probe(struct device *dev, const char *name, void *priv, const struct s
return devm_iio_device_register(dev, indio_dev);
}
-EXPORT_SYMBOL_NS_GPL(sps30_probe, IIO_SPS30);
+EXPORT_SYMBOL_NS_GPL(sps30_probe, "IIO_SPS30");
MODULE_AUTHOR("Tomasz Duszynski <tduszyns@gmail.com>");
MODULE_DESCRIPTION("Sensirion SPS30 particulate matter sensor driver");
diff --git a/drivers/iio/chemical/sps30_i2c.c b/drivers/iio/chemical/sps30_i2c.c
index 5c31299813ec..f692c089d17b 100644
--- a/drivers/iio/chemical/sps30_i2c.c
+++ b/drivers/iio/chemical/sps30_i2c.c
@@ -6,7 +6,7 @@
*
* I2C slave address: 0x69
*/
-#include <asm/unaligned.h>
+#include <linux/unaligned.h>
#include <linux/crc8.h>
#include <linux/delay.h>
#include <linux/device.h>
@@ -256,4 +256,4 @@ module_i2c_driver(sps30_i2c_driver);
MODULE_AUTHOR("Tomasz Duszynski <tomasz.duszynski@octakon.com>");
MODULE_DESCRIPTION("Sensirion SPS30 particulate matter sensor i2c driver");
MODULE_LICENSE("GPL v2");
-MODULE_IMPORT_NS(IIO_SPS30);
+MODULE_IMPORT_NS("IIO_SPS30");
diff --git a/drivers/iio/chemical/sps30_serial.c b/drivers/iio/chemical/sps30_serial.c
index 3afa89f8acc3..008bc88590f3 100644
--- a/drivers/iio/chemical/sps30_serial.c
+++ b/drivers/iio/chemical/sps30_serial.c
@@ -210,8 +210,8 @@ static int sps30_serial_command(struct sps30_state *state, unsigned char cmd,
return rsp_size;
}
-static ssize_t sps30_serial_receive_buf(struct serdev_device *serdev,
- const u8 *buf, size_t size)
+static size_t sps30_serial_receive_buf(struct serdev_device *serdev,
+ const u8 *buf, size_t size)
{
struct iio_dev *indio_dev = dev_get_drvdata(&serdev->dev);
struct sps30_serial_priv *priv;
@@ -429,4 +429,4 @@ module_serdev_device_driver(sps30_serial_driver);
MODULE_AUTHOR("Tomasz Duszynski <tomasz.duszynski@octakon.com>");
MODULE_DESCRIPTION("Sensirion SPS30 particulate matter sensor serial driver");
MODULE_LICENSE("GPL v2");
-MODULE_IMPORT_NS(IIO_SPS30);
+MODULE_IMPORT_NS("IIO_SPS30");
generated by cgit (git 2.34.1) at 2025-08-02 09:47:00 +0000