mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-29 23:53:55 +08:00
1a539d372e
Add support for Sensirion SHTC1 and compatible temperature and humidity sensors. Signed-off-by: Tomas Pop <tomas.pop@sensirion.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
44 lines
1.4 KiB
Plaintext
44 lines
1.4 KiB
Plaintext
Kernel driver shtc1
|
|
===================
|
|
|
|
Supported chips:
|
|
* Sensirion SHTC1
|
|
Prefix: 'shtc1'
|
|
Addresses scanned: none
|
|
Datasheet: http://www.sensirion.com/file/datasheet_shtc1
|
|
|
|
* Sensirion SHTW1
|
|
Prefix: 'shtw1'
|
|
Addresses scanned: none
|
|
Datasheet: Not publicly available
|
|
|
|
Author:
|
|
Johannes Winkelmann <johannes.winkelmann@sensirion.com>
|
|
|
|
Description
|
|
-----------
|
|
|
|
This driver implements support for the Sensirion SHTC1 chip, a humidity and
|
|
temperature sensor. Temperature is measured in degrees celsius, relative
|
|
humidity is expressed as a percentage. Driver can be used as well for SHTW1
|
|
chip, which has the same electrical interface.
|
|
|
|
The device communicates with the I2C protocol. All sensors are set to I2C
|
|
address 0x70. See Documentation/i2c/instantiating-devices for methods to
|
|
instantiate the device.
|
|
|
|
There are two options configurable by means of shtc1_platform_data:
|
|
1. blocking (pull the I2C clock line down while performing the measurement) or
|
|
non-blocking mode. Blocking mode will guarantee the fastest result but
|
|
the I2C bus will be busy during that time. By default, non-blocking mode
|
|
is used. Make sure clock-stretching works properly on your device if you
|
|
want to use blocking mode.
|
|
2. high or low accuracy. High accuracy is used by default and using it is
|
|
strongly recommended.
|
|
|
|
sysfs-Interface
|
|
---------------
|
|
|
|
temp1_input - temperature input
|
|
humidity1_input - humidity input
|