kernel/git/stable/linux.git/drivers/iio/chemical/Kconfig, branch master

iio: chemical: Add driver for SEN0322

2025-05-21T13:22:32+00:00

Add support for the DFRobot SEN0322 oxygen sensor. To instantiate (assuming device is connected to I2C-2): echo 'sen0322 0x73' > /sys/class/i2c-dev/i2c-2/device/new_device To get the oxygen concentration (assuming device is iio:device0) multiply the values read from: /sys/bus/iio/devices/iio:device0/in_concentration_raw /sys/bus/iio/devices/iio:device0/in_concentration_scale Datasheet: https://wiki.dfrobot.com/Gravity_I2C_Oxygen_Sensor_SKU_SEN0322 Signed-off-by: Tóth János Link: https://patch.msgid.link/20250506-iio-chemical-sen0322-v4-2-1465ac8dc190@gmail.com Signed-off-by: Jonathan Cameron

iio: chemical: Add support for Winsen MHZ19B CO2 sensor

2025-05-21T13:20:28+00:00

Add support for Winsen MHZ19B CO2 sensor. Datasheet: https://www.winsen-sensor.com/d/files/infrared-gas-sensor/mh-z19b-co2-ver1_0.pdf Signed-off-by: Gyeyoung Baek Reviewed-by: Andy Shevchenko Link: https://patch.msgid.link/20250423194100.53934-4-gye976@gmail.com Signed-off-by: Jonathan Cameron

iio: chemical: bme680: Add triggered buffer support

2024-11-03T20:33:45+00:00

Add triggered buffer and soft timestamp support. The available scan mask enables all the channels of the sensor in order to follow the operation of the sensor. The sensor basically starts to capture from all channels as long as it enters into FORCED mode. The bulk read, reads a total of 15 registers from the sensor, 0x1D..0x2B. Even though some of those registers are not reported in the register map of the device, this is how the BME680 Sensor API [1] proposes to do it. This allows to have one bulk read instead of multiple ones. Link: https://github.com/boschsensortec/BME68x_SensorAPI/blob/v4.4.8/bme68x.c#L1200 Signed-off-by: Vasileios Amoiridis Link: https://patch.msgid.link/20241102131311.36210-4-vassilisamir@gmail.com Signed-off-by: Jonathan Cameron

iio: chemical: ens160: add missing select IIO_(TRIGGERED_)BUFFER in Kconfig

2024-10-06T15:29:13+00:00

This driver makes use of triggered buffers, but does not select the required modules. Add the missing 'select IIO_BUFFER' and 'select IIO_TRIGGERED_BUFFER'. Fixes: 0fc26596b4b3 ("iio: chemical: ens160: add triggered buffer support") Signed-off-by: Javier Carrasco Acked-by: Gustavo Silva Link: https://patch.msgid.link/20241003-iio-select-v1-9-67c0385197cd@gmail.com Cc: Signed-off-by: Jonathan Cameron

iio: chemical: add driver for ENS160 sensor

2024-06-13T18:19:25+00:00

ScioSense ENS160 is a digital metal oxide multi-gas sensor, designed for indoor air quality monitoring. The driver supports readings of CO2 and VOC, and can be accessed via both SPI and I2C. Datasheet: https://www.sciosense.com/wp-content/uploads/2023/12/ENS160-Datasheet.pdf Signed-off-by: Gustavo Silva Link: https://lore.kernel.org/r/20240604225747.7212-4-gustavograzs@gmail.com Signed-off-by: Jonathan Cameron

iio: chemical: add support for Aosong AGS02MA

2023-12-17T14:44:35+00:00

A simple driver for the TVOC (Total Volatile Organic Compounds) sensor from Aosong: AGS02MA Steps in reading the VOC sensor value over i2c: 1. Read 5 bytes from the register `AGS02MA_TVOC_READ_REG` [0x00] 2. The first 4 bytes are taken as the big endian sensor data with final byte being the CRC 3. The CRC is verified and the value is returned over an `IIO_CHAN_INFO_RAW` channel as percents Tested on Raspberry Pi Zero 2W Datasheet: https://asairsensors.com/wp-content/uploads/2021/09/AGS02MA.pdf Signed-off-by: Anshul Dalal Link: https://lore.kernel.org/r/20231215162312.143568-3-anshulusr@gmail.com Signed-off-by: Jonathan Cameron

drivers: iio: chemical: Add support for Sensirion SCD4x CO2 sensor

2021-10-19T07:30:44+00:00

This is a driver for the SCD4x CO2 sensor from Sensirion. The sensor is able to measure CO2 concentration, temperature and relative humdity. The sensor uses a photoacoustic principle for measuring CO2 concentration. An I2C interface is supported by this driver in order to communicate with the sensor. Signed-off-by: Roan van Dijk Link: https://lore.kernel.org/r/20211008101706.755942-4-roan@protonic.nl Signed-off-by: Jonathan Cameron

iio: chemical: SENSEAIR_SUNRISE_CO2 depends on I2C

2021-10-19T07:29:05+00:00

Fix kconfig symbol dependency warning: WARNING: unmet direct dependencies detected for REGMAP_I2C Depends on [n]: I2C [=n] Selected by [y]: - SENSEAIR_SUNRISE_CO2 [=y] && IIO [=y] Fixes: c397894e24f1 ("iio: chemical: Add Senseair Sunrise 006-0-007 drive") Signed-off-by: Randy Dunlap Cc: Jacopo Mondi Cc: Jonathan Cameron Cc: linux-iio@vger.kernel.org Link: https://lore.kernel.org/r/20211002232803.5108-1-rdunlap@infradead.org Signed-off-by: Jonathan Cameron

iio: chemical: Add Senseair Sunrise 006-0-007 driver

2021-10-19T07:27:31+00:00

Add support for the Senseair Sunrise 006-0-0007 driver through the IIO subsystem. Datasheet: https://rmtplusstoragesenseair.blob.core.windows.net/docs/Dev/publicerat/TDE5531.pdf Signed-off-by: Jacopo Mondi Link: https://lore.kernel.org/r/20210920135413.140310-4-jacopo+renesas@jmondi.org Signed-off-by: Jonathan Cameron

iio: chemical: Add driver support for sgp40

2021-08-08T14:19:18+00:00

sgp40 is a gas sensor used for measuring the air quality. This driver is reading the raw resistance value which can be passed to an userspace algorithm for further calculation. The raw value is also used to calculate an estimated absolute voc index in the range from 0 to 500. For this purpose the raw_mean value of the resistance for which the index value is 250 might be set up as a calibration step. This can be done with in_resistance_calibbias. Compensation of relative humidity and temperature is supported and can be used by writing to output values of out_humidityrelative_raw and out_temp_raw. There is a predecesor sensor type (sgp30) already existing. This driver module was not extended because the new sensor is quite different in its i2c telegrams. Signed-off-by: Andreas Klinger Reported-by: kernel test robot Link: https://lore.kernel.org/r/20210804154641.GA3237@arbad Signed-off-by: Jonathan Cameron