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Tip revision: b9bbe6ed63b2b9f2c9ee5cbd0f2c946a2723f4ce authored by Linus Torvalds on 17 May 2020, 23:48:37 UTC
Linux 5.7-rc6
Linux 5.7-rc6
Tip revision: b9bbe6e
shtc1.rst
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: http://www.sensirion.com/file/datasheet_shtw1
* Sensirion SHTC3
Prefix: 'shtc3'
Addresses scanned: none
Datasheet: http://www.sensirion.com/file/datasheet_shtc3
Author:
Johannes Winkelmann <johannes.winkelmann@sensirion.com>
Description
-----------
This driver implements support for the Sensirion SHTC1, SHTW1, and SHTC3
chips, a humidity and temperature sensor. Temperature is measured in degrees
celsius, relative humidity is expressed as a percentage.
The device communicates with the I2C protocol. All sensors are set to I2C
address 0x70. See Documentation/i2c/instantiating-devices.rst 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