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author | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2019-04-17 06:46:29 -0300 |
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committer | Guenter Roeck <linux@roeck-us.net> | 2019-04-17 10:37:23 -0700 |
commit | 7ebd8b66dd9e5a0b65e5ee5e2b8e7ca382ec97b7 (patch) | |
tree | 9db30159bd32bec125c7d49e80a79bb7c4da0c8e /Documentation/hwmon/sht15.rst | |
parent | b04f2f7d387b3160883c2a1f5e2285483a791e82 (diff) | |
download | talos-op-linux-7ebd8b66dd9e5a0b65e5ee5e2b8e7ca382ec97b7.tar.gz talos-op-linux-7ebd8b66dd9e5a0b65e5ee5e2b8e7ca382ec97b7.zip |
docs: hwmon: Add an index file and rename docs to *.rst
Now that all files were converted to ReST format, rename them
and add an index.
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'Documentation/hwmon/sht15.rst')
-rw-r--r-- | Documentation/hwmon/sht15.rst | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/Documentation/hwmon/sht15.rst b/Documentation/hwmon/sht15.rst new file mode 100644 index 000000000000..485abe037f6c --- /dev/null +++ b/Documentation/hwmon/sht15.rst @@ -0,0 +1,83 @@ +Kernel driver sht15 +=================== + +Authors: + + * Wouter Horre + * Jonathan Cameron + * Vivien Didelot <vivien.didelot@savoirfairelinux.com> + * Jerome Oufella <jerome.oufella@savoirfairelinux.com> + +Supported chips: + + * Sensirion SHT10 + + Prefix: 'sht10' + + * Sensirion SHT11 + + Prefix: 'sht11' + + * Sensirion SHT15 + + Prefix: 'sht15' + + * Sensirion SHT71 + + Prefix: 'sht71' + + * Sensirion SHT75 + + Prefix: 'sht75' + +Datasheet: Publicly available at the Sensirion website + + http://www.sensirion.ch/en/pdf/product_information/Datasheet-humidity-sensor-SHT1x.pdf + +Description +----------- + +The SHT10, SHT11, SHT15, SHT71, and SHT75 are humidity and temperature +sensors. + +The devices communicate using two GPIO lines. + +Supported resolutions for the measurements are 14 bits for temperature and 12 +bits for humidity, or 12 bits for temperature and 8 bits for humidity. + +The humidity calibration coefficients are programmed into an OTP memory on the +chip. These coefficients are used to internally calibrate the signals from the +sensors. Disabling the reload of those coefficients allows saving 10ms for each +measurement and decrease power consumption, while losing on precision. + +Some options may be set via sysfs attributes. + +Notes: + * The regulator supply name is set to "vcc". + * If a CRC validation fails, a soft reset command is sent, which resets + status register to its hardware default value, but the driver will try to + restore the previous device configuration. + +Platform data +------------- + +* checksum: + set it to true to enable CRC validation of the readings (default to false). +* no_otp_reload: + flag to indicate not to reload from OTP (default to false). +* low_resolution: + flag to indicate the temp/humidity resolution to use (default to false). + +Sysfs interface +--------------- + +================== ========================================================== +temp1_input temperature input +humidity1_input humidity input +heater_enable write 1 in this attribute to enable the on-chip heater, + 0 to disable it. Be careful not to enable the heater + for too long. +temp1_fault if 1, this means that the voltage is low (below 2.47V) and + measurement may be invalid. +humidity1_fault same as temp1_fault. +================== ========================================================== |