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-rw-r--r--drivers/iio/chemical/Kconfig20
-rw-r--r--drivers/iio/chemical/Makefile3
-rw-r--r--drivers/iio/chemical/ams-iaq-core.c4
-rw-r--r--drivers/iio/chemical/bme680_i2c.c4
-rw-r--r--drivers/iio/chemical/ccs811.c2
-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
9 files changed, 528 insertions, 5 deletions
diff --git a/drivers/iio/chemical/Kconfig b/drivers/iio/chemical/Kconfig
index 02649ab81b3c..678a6adb9a75 100644
--- a/drivers/iio/chemical/Kconfig
+++ b/drivers/iio/chemical/Kconfig
@@ -76,6 +76,26 @@ 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 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_i2c.c b/drivers/iio/chemical/bme680_i2c.c
index 1c7076cf91ca..7c4224d75955 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);
diff --git a/drivers/iio/chemical/ccs811.c b/drivers/iio/chemical/ccs811.c
index 87741f155c32..17d1bc518bf2 100644
--- a/drivers/iio/chemical/ccs811.c
+++ b/drivers/iio/chemical/ccs811.c
@@ -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..c1aa3b498d3b
--- /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];
+ s64 timestamp __aligned(8);
+ } 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..57a189a4c257
--- /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..10e4f5fd0f45
--- /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);
generated by cgit v1.2.3 (git 2.39.0) at 2025-03-13 17:25:20 +0300