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authorTomas Pop <Tomas.Pop@sensirion.com>2014-06-05 15:24:19 -0700
committerGuenter Roeck <linux@roeck-us.net>2014-06-12 08:36:48 -0700
commit1a539d372edd9832444e7a3daa710c444c014dc9 (patch)
treeae4029bc700a6f66752276477f00f39cd4b6dee5 /Documentation/hwmon
parent31e3879127d4db56ad445fd948ca39c393ee65d7 (diff)
downloadkernel-1a539d372edd9832444e7a3daa710c444c014dc9.tar.gz
hwmon: add support for Sensirion SHTC1 sensor
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>
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+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