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/linux-6.12.1/drivers/iio/humidity/
DKconfig3 # humidity sensor drivers
5 menu "Humidity sensors"
8 tristate "Aosong AM2315 relative humidity and temperature sensor"
14 relative humidity and ambient temperature sensor.
29 tristate "ENS210 temperature and humidity sensor"
34 humidity and temperature sensors.
40 tristate "TI HDC100x relative humidity and temperature sensor"
47 humidity and temperature sensors.
53 tristate "TI HDC2010 relative humidity and temperature sensor"
57 HDC2010 and HDC2080 relative humidity and temperature sensors.
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Dhtu21.c4 * htu21 temperature & humidity sensor
5 * and humidity part of MS8607 sensor
44 unsigned int humidity; in htu21_read_raw() local
60 &humidity); in htu21_read_raw()
63 *val = humidity; in htu21_read_raw()
234 {"ms8607-humidity", MS8607},
241 { .compatible = "meas,ms8607-humidity", },
257 MODULE_DESCRIPTION("Measurement-Specialties htu21 temperature and humidity driver");
Dsi7020.c3 * si7020.c - Silicon Labs Si7013/20/21 Relative Humidity and Temp Sensors
9 * The Silicon Labs Si7013/20/21 Relative Humidity and Temperature Sensors
11 * measuring relative humidity and temperature. The Si7013 has an additional
31 /* Measure Relative Humidity, Hold Master Mode */
76 * Humidity values can slightly exceed the 0-100%RH in si7020_read_raw()
94 * Relative humidity will be 0.0032959% too high and in si7020_read_raw()
292 MODULE_DESCRIPTION("Silicon Labs Si7013/20/21 Relative Humidity and Temperature Sensors");
/linux-6.12.1/Documentation/hwmon/
Dchipcap2.rst14 …Datasheet: https://www.amphenol-sensors.com/en/telaire/humidity/527-humidity-sensors/3095-chipcap-2
23 This driver implements support for the Amphenol ChipCap 2, a humidity and
25 relative humidity is expressed as a per cent mille. The measurement ranges
28 - Relative humidity: 0 to 100000 pcm (14-bit resolution)
34 Depending on the hardware configuration, up to two humidity alarms to control
56 humidity1_input: RO humidity input
65 humidity1_min: RW humidity low limit. Measurements under
66 this limit trigger a humidity low alarm
67 humidity1_max: RW humidity high limit. Measurements above
68 this limit trigger a humidity high alarm
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Dsht3x.rst35 series of humidity and temperature sensors. Temperature is measured in degrees
36 celsius, relative humidity is expressed as a percentage. In the sysfs interface,
61 with the configured update interval on the chip. When a temperature or humidity
64 When the temperature and humidity readings move back between the hysteresis
77 humidity1_input: humidity input
80 humidity1_max: humidity max value
81 humidity1_max_hyst: humidity hysteresis value for max limit
84 humidity1_min: humidity min value
85 humidity1_min_hyst: humidity hysteresis value for min limit
88 humidity1_alarm: alarm flag is set to 1 if the humidity is outside the
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Dsht15.rst35 http://www.sensirion.ch/en/pdf/product_information/Datasheet-humidity-sensor-SHT1x.pdf
40 The SHT10, SHT11, SHT15, SHT71, and SHT75 are humidity and temperature
46 bits for humidity, or 12 bits for temperature and 8 bits for humidity.
48 The humidity calibration coefficients are programmed into an OTP memory on the
69 flag to indicate the temp/humidity resolution to use (default to false).
76 humidity1_input humidity input
Dsht21.rst37 The SHT21 and SHT25 are humidity and temperature sensors in a DFN package of
39 devices is the higher level of precision of the SHT25 (1.8% relative humidity,
40 0.2 degree Celsius) compared with the SHT21 (2.0% relative humidity,
54 - humidity input
61 The driver uses the default resolution settings of 12 bit for humidity and 14
63 humidity and 66 ms for temperature. To keep self heating below 0.1 degree
Dhs3001.rst23 This driver implements support for the Renesas HS3001 chips, a humidity
25 humidity is expressed as a percentage. In the sysfs interface, all values are
36 humidity1_input: humidity input
Dshtc1.rst44 chips, a humidity and temperature sensor. Temperature is measured in degrees
45 celsius, relative humidity is expressed as a percentage.
67 - humidity input
/linux-6.12.1/Documentation/devicetree/bindings/hwmon/
Damphenol,chipcap2.yaml7 title: ChipCap 2 humidity and temperature iio sensor
13 Relative humidity and temperature sensor on I2C bus.
16 https://www.amphenol-sensors.com/en/telaire/humidity/527-humidity-sensors/3095-chipcap-2
39 - description: low humidity alarm
40 - description: high humidity alarm
67 humidity@28 {
/linux-6.12.1/drivers/hwmon/
Dhih6130.c2 /* Honeywell HIH-6130/HIH-6131 humidity and temperature sensor driver
32 * @humidity: cached humidity measurement value
41 int humidity; member
61 * hih6130_rh_ticks_to_per_cent_mille() - convert raw humidity ticks to
62 * one-thousandths of a percent relative humidity
63 * @ticks: humidity ticks value received from sensor
103 * The datasheet specifies maximum 'Response time' for humidity at 8s in hih6130_update_measurements()
138 hih6130->humidity = hih6130_rh_ticks_to_per_cent_mille(t); in hih6130_update_measurements()
175 * hih6130_humidity_show() - show humidity measurement value in sysfs
192 return sprintf(buf, "%d\n", hih6130->humidity); in hih6130_humidity_show()
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Dsht21.c2 /* Sensirion SHT21 humidity and temperature sensor driver
34 * @humidity: cached humidity measurement value
43 int humidity; member
64 * sht21_rh_ticks_to_per_cent_mille() - convert raw humidity ticks to
65 * one-thousandths of a percent relative humidity
66 * @ticks: humidity ticks value received from sensor
106 sht21->humidity = sht21_rh_ticks_to_per_cent_mille(ret); in sht21_update_measurements()
139 * sht21_humidity_show() - show humidity measurement value in sysfs
156 return sprintf(buf, "%d\n", sht21->humidity); in sht21_humidity_show()
292 MODULE_DESCRIPTION("Sensirion SHT21 humidity and temperature sensor driver");
Dhs3001.c4 * HS3001 humidity and temperature sensor and compatibles. It does not include
48 u32 humidity; /* in milli % */ member
93 data->humidity = in hs3001_data_fetch_command()
104 /* Both, humidity and temperature can only be read. */ in hs3001_is_visible()
147 *val = data->humidity; in hs3001_read()
162 HWMON_CHANNEL_INFO(humidity, HWMON_H_INPUT),
208 * + measurement time humidity. This is currently static, because in hs3001_probe()
241 MODULE_DESCRIPTION("HS3001 humidity and temperature sensor base driver");
Dsht4x.c6 * sht4x.c - Linux hwmon driver for SHT4x Temperature and Humidity sensor
56 * @humidity: the latest humidity value received from the SHT4X
65 s32 humidity; member
121 data->humidity = ((15625 * (int32_t)rh_ticks) >> 13) - 6000; in sht4x_read_values()
159 /* sht4x_humidity1_read() - read a relative humidity in millipercent */
168 *val = data->humidity; in sht4x_humidity1_read()
221 HWMON_CHANNEL_INFO(humidity, HWMON_H_INPUT),
302 MODULE_DESCRIPTION("Sensirion SHT4x humidity and temperature sensor driver");
Daht10.c4 * aht10.c - Linux hwmon driver for AHT10/AHT20 Temperature and Humidity sensors
76 * @humidity: the latest humidity value received from the
92 int humidity; member
210 data->humidity = hum; in aht10_read_values()
256 * aht10_humidity1_read() - read the relative humidity in millipercent
266 *val = data->humidity; in aht10_humidity1_read()
317 HWMON_CHANNEL_INFO(humidity, HWMON_H_INPUT),
391 MODULE_DESCRIPTION("AHT10/AHT20 Temperature and Humidity sensor driver");
Dsht3x.c2 /* Sensirion SHT3x-DIS humidity and temperature sensor driver.
159 HWMON_CHANNEL_INFO(humidity, HWMON_H_INPUT | HWMON_H_MIN |
180 * cached values for temperature and humidity and limits
186 u32 humidity; member
285 data->humidity = sht3x_extract_humidity(val); in sht3x_update_client()
314 return data->humidity; in humidity1_input_read()
325 u32 humidity; in limits_update() local
342 humidity = sht3x_extract_humidity(raw & 0xfe00); in limits_update()
344 data->humidity_limits[index] = humidity; in limits_update()
370 u32 humidity) in limit_write() argument
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/linux-6.12.1/Documentation/ABI/testing/
Dsysfs-class-hwmon923 Humidity limit detection
926 - 1: Humidity limit has been reached
944 Reports a humidity sensor failure.
953 Humidity
961 Suggested humidity channel label.
966 this humidity channel is being used for, and user-space
974 Humidity max value.
982 Maximum humidity detection
985 - 1: Maximum humidity detected
991 Humidity hysteresis value for max limit.
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Dsysfs-bus-iio-chemical-sgp4015 Set the relative humidity. This value is sent to the sensor for
16 humidity compensation.
17 Default value: 50000 (50 % relative humidity)
/linux-6.12.1/Documentation/devicetree/bindings/
Dtrivial-devices.yaml112 # Honeywell Humidicon HIH-6130 humidity/temperature sensor
194 # Measurement Specialities I2C temperature and humidity sensor
204 # Measurement Specialities temp and humidity part of ms8607 device
205 - meas,ms8607-humidity
316 # Renesas HS3001 Temperature and Relative Humidity Sensors
336 # Sensirion temperature & humidity sensor with I2C interface
348 # Relative Humidity and Temperature Sensors
350 # Relative Humidity and Temperature Sensors
362 # Temperature and humidity sensor with i2c interface
364 # Temperature and humidity sensor with i2c interface
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/linux-6.12.1/Documentation/devicetree/bindings/iio/humidity/
Dti,hdc2010.yaml4 $id: http://devicetree.org/schemas/iio/humidity/ti,hdc2010.yaml#
7 title: HDC2010/HDC2080 humidity and temperature iio sensors
13 Relative humidity and temperature sensors on I2C bus
45 humidity@40 {
Dti,hdc3020.yaml4 $id: http://devicetree.org/schemas/iio/humidity/ti,hdc3020.yaml#
7 title: HDC3020/HDC3021/HDC3022 humidity and temperature iio sensors
16 The HDC302x is an integrated capacitive based relative humidity (RH)
55 humidity-sensor@47 {
Ddht11.yaml4 $id: http://devicetree.org/schemas/iio/humidity/dht11.yaml#
7 title: DHT11 humidity + temperature sensor
37 humidity-sensor {
Dst,hts221.yaml4 $id: http://devicetree.org/schemas/iio/humidity/st,hts221.yaml#
7 title: HTS221 STM humidity + temperature sensor
13 Humidity and temperature sensor with I2C interface and data ready
Dsciosense,ens210.yaml4 $id: http://devicetree.org/schemas/iio/humidity/sciosense,ens210.yaml#
7 title: ScioSense ENS210 temperature and humidity sensor
13 Temperature and Humidity sensor.
/linux-6.12.1/drivers/iio/common/ms_sensors/
Dms_sensors_i2c.c276 * @dev_data: pointer to temperature/humidity device data
306 * @dev_data: pointer to temperature/humidity device data
333 * @dev_data: pointer to temperature/humidity device data
360 * @dev_data: pointer to temperature/humidity device data
408 * @dev_data: pointer to temperature/humidity device data
448 * ms_sensors_ht_read_humidity() - Read humidity
449 * @dev_data: pointer to temperature/humidity device data
450 * @humidity: pointer to humidity destination value
452 * This function will get humidity ADC value from the device,
459 u32 *humidity) in ms_sensors_ht_read_humidity() argument
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