diff options
| author | Johannes Cornelis Draaijer (datdenkikniet) <jcdra1@gmail.com> | 2021-01-07 20:40:14 +0100 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2021-01-27 17:44:18 -0800 |
| commit | 8c78f0dee4371ab3b0422edf08597525c6219512 (patch) | |
| tree | 3c8021fe46136bf26bb7e0781630b2bca1d83955 /Documentation/hwmon | |
| parent | 0bf6a1e85ddd4000f461086d08260452aaf30302 (diff) | |
hwmon: Add AHT10 Temperature and Humidity Sensor Driver
This patch adds a hwmon driver for the AHT10 Temperature and
Humidity sensor. It has a maximum sample rate, as the datasheet
states that the chip may heat up if it is sampled more than once
every two seconds.
Has been tested a to work on a raspberrypi0w
Signed-off-by: Johannes Cornelis Draaijer (datdenkikniet) <jcdra1@gmail.com>
Link: https://lore.kernel.org/r/20210107194014.GA88780@desktop
[groeck: dropped AHT10_ADDR (unused) and use AHT10_MEAS_SIZE where
appropriate; dropped change log]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'Documentation/hwmon')
| -rw-r--r-- | Documentation/hwmon/aht10.rst | 46 | ||||
| -rw-r--r-- | Documentation/hwmon/index.rst | 1 |
2 files changed, 47 insertions, 0 deletions
diff --git a/Documentation/hwmon/aht10.rst b/Documentation/hwmon/aht10.rst new file mode 100644 index 000000000000..482262ca117c --- /dev/null +++ b/Documentation/hwmon/aht10.rst @@ -0,0 +1,46 @@ +.. SPDX-License-Identifier: GPL-2.0 + +Kernel driver aht10 +===================== + +Supported chips: + + * Aosong AHT10 + + Prefix: 'aht10' + + Addresses scanned: None + + Datasheet: + + Chinese: http://www.aosong.com/userfiles/files/media/AHT10%E4%BA%A7%E5%93%81%E6%89%8B%E5%86%8C%20A3%2020201210.pdf + English: https://server4.eca.ir/eshop/AHT10/Aosong_AHT10_en_draft_0c.pdf + +Author: Johannes Cornelis Draaijer <jcdra1@gmail.com> + + +Description +----------- + +The AHT10 is a Temperature and Humidity sensor + +The address of this i2c device may only be 0x38 + +Usage Notes +----------- + +This driver does not probe for AHT10 devices, as there is no reliable +way to determine if an i2c chip is or isn't an AHT10. The device has +to be instantiated explicitly with the address 0x38. See +Documentation/i2c/instantiating-devices.rst for details. + +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. +=============== ============================================ diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst index ebe53bb771dd..3589151bcefb 100644 --- a/Documentation/hwmon/index.rst +++ b/Documentation/hwmon/index.rst @@ -37,6 +37,7 @@ Hardware Monitoring Kernel Drivers adt7462 adt7470 adt7475 + aht10 amc6821 amd_energy asb100 |