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author | Tomas Pop <Tomas.Pop@sensirion.com> | 2014-06-05 15:24:19 -0700 |
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committer | Guenter Roeck <linux@roeck-us.net> | 2014-06-12 08:36:48 -0700 |
commit | 1a539d372edd9832444e7a3daa710c444c014dc9 (patch) | |
tree | ae4029bc700a6f66752276477f00f39cd4b6dee5 /Documentation/hwmon/shtc1 | |
parent | 31e3879127d4db56ad445fd948ca39c393ee65d7 (diff) | |
download | linux-stable-1a539d372edd9832444e7a3daa710c444c014dc9.tar.gz linux-stable-1a539d372edd9832444e7a3daa710c444c014dc9.tar.bz2 linux-stable-1a539d372edd9832444e7a3daa710c444c014dc9.zip |
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>
Diffstat (limited to 'Documentation/hwmon/shtc1')
-rw-r--r-- | Documentation/hwmon/shtc1 | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/Documentation/hwmon/shtc1 b/Documentation/hwmon/shtc1 new file mode 100644 index 000000000000..6b1e05458f0f --- /dev/null +++ b/Documentation/hwmon/shtc1 @@ -0,0 +1,43 @@ +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 |