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| author |   Navin Sankar Velliangiri <navin@linumiz.com> | 2021-05-24 19:50:38 +0530 |
|---|---|---|
| committer |   Guenter Roeck <linux@roeck-us.net> | 2021-06-17 04:21:45 -0700 |
| commit | 505c2549373f3aa9ee16493f872e57876ffb70b1 (patch) | |
| tree | 6b48ea11b9eabd661a5e01eb5ceaf86acbb5ffd5 /Documentation/hwmon | |
| parent | docs: hwmon: Add an entry for mp2888 (diff) | |
| download | linux-dev-505c2549373f3aa9ee16493f872e57876ffb70b1.tar.xz linux-dev-505c2549373f3aa9ee16493f872e57876ffb70b1.zip | |
hwmon: Add sht4x Temperature and Humidity Sensor Driver
This patch adds a hwmon driver for the SHT4x Temperature and
Humidity sensor.
Signed-off-by: Navin Sankar Velliangiri <navin@linumiz.com>
[groeck: dropped unnecessary empty line and continuation lines]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'Documentation/hwmon')
| -rw-r--r-- | Documentation/hwmon/index.rst | 1 | ||||
| -rw-r--r-- | Documentation/hwmon/sht4x.rst | 45 |
2 files changed, 46 insertions, 0 deletions
diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst index 6925a8a70511..61e5d4532622 100644 --- a/Documentation/hwmon/index.rst +++ b/Documentation/hwmon/index.rst @@ -165,6 +165,7 @@ Hardware Monitoring Kernel Drivers sht15 sht21 sht3x + sht4x shtc1 sis5595 sl28cpld diff --git a/Documentation/hwmon/sht4x.rst b/Documentation/hwmon/sht4x.rst new file mode 100644 index 000000000000..3b37abcd4a46 --- /dev/null +++ b/Documentation/hwmon/sht4x.rst @@ -0,0 +1,45 @@ +.. SPDX-License-Identifier: GPL-2.0 + +Kernel driver sht4x +=================== + +Supported Chips: + + * Sensirion SHT4X + + Prefix: 'sht4x' + + Addresses scanned: None + + Datasheet: + + English: https://www.sensirion.com/fileadmin/user_upload/customers/sensirion/Dokumente/2_Humidity_Sensors/Datasheets/Sensirion_Humidity_Sensors_SHT4x_Datasheet.pdf + +Author: Navin Sankar Velliangiri <navin@linumiz.com> + + +Description +----------- + +This driver implements support for the Sensirion SHT4x chip, a humidity +and temperature sensor. Temperature is measured in degree celsius, relative +humidity is expressed as a percentage. In sysfs interface, all values are +scaled by 1000, i.e. the value for 31.5 degrees celsius is 31500. + +Usage Notes +----------- + +The device communicates with the I2C protocol. Sensors can have the I2C +address 0x44. See Documentation/i2c/instantiating-devices.rst for methods +to instantiate the device. + +Sysfs entries +------------- + +=============== ============================================ +temp1_input Measured temperature in millidegrees Celcius +humidity1_input Measured humidity in %H +update_interval The minimum interval for polling the sensor, + in milliseconds. Writable. Must be at least + 2000. +============== ============================================= |