path: root/Documentation
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authorLinus Torvalds <torvalds@linux-foundation.org>2014-06-14 14:43:23 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-06-14 14:43:23 -0700
commit503698e12d68f6144b408b11156ad315943ffb53 (patch)
tree378979f76b321a114e910da59e06f1d6c2ff625e /Documentation
parent6391f34e844c71ebf645058b2b643f70fed5b990 (diff)
parent78cebd0889c7b8b92f43e7667efc16636b858c34 (diff)
Merge tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging
Pull hwmon updates from Guenter Roeck: - new driver for Sensirion SHTC1 humidity / temperature sensor - convert ltc4151 and vexpress drivers to use devm functions - drop generic chip detection from lm85 driver - avoid forward declarations in atxp1 driver - fix sign extensions in ina2xx driver * tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging: hwmon: vexpress: Use devm helper for hwmon device registration hwmon: (atxp1) Avoid forward declaration hwmon: add support for Sensirion SHTC1 sensor hwmon: (ltc4151) Convert to devm_hwmon_device_register_with_groups hwmon: (lm85) Drop generic detection hwmon: (ina2xx) Cast to s16 on shunt and current regs
Diffstat (limited to 'Documentation')
1 files changed, 43 insertions, 0 deletions
diff --git a/Documentation/hwmon/shtc1 b/Documentation/hwmon/shtc1
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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
+ Johannes Winkelmann <johannes.winkelmann@sensirion.com>
+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.
+temp1_input - temperature input
+humidity1_input - humidity input

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