projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 1a539d37 TP |
1 | Kernel driver shtc1 |
| 2 | =================== | |
| 3 | ||
| 4 | Supported chips: | |
| 5 | * Sensirion SHTC1 | |
| 6 | Prefix: 'shtc1' | |
| 7 | Addresses scanned: none | |
| 8 | Datasheet: http://www.sensirion.com/file/datasheet_shtc1 | |
| 9 | ||
| 10 | * Sensirion SHTW1 | |
| 11 | Prefix: 'shtw1' | |
| 12 | Addresses scanned: none | |
| 13 | Datasheet: Not publicly available | |
| 14 | ||
| 15 | Author: | |
| 16 | Johannes Winkelmann <johannes.winkelmann@sensirion.com> | |
| 17 | ||
| 18 | Description | |
| 19 | ----------- | |
| 20 | ||
| 21 | This driver implements support for the Sensirion SHTC1 chip, a humidity and | |
| 22 | temperature sensor. Temperature is measured in degrees celsius, relative | |
| 23 | humidity is expressed as a percentage. Driver can be used as well for SHTW1 | |
| 24 | chip, which has the same electrical interface. | |
| 25 | ||
| 26 | The device communicates with the I2C protocol. All sensors are set to I2C | |
| 27 | address 0x70. See Documentation/i2c/instantiating-devices for methods to | |
| 28 | instantiate the device. | |
| 29 | ||
| 30 | There are two options configurable by means of shtc1_platform_data: | |
| 31 | 1. blocking (pull the I2C clock line down while performing the measurement) or | |
| 32 | non-blocking mode. Blocking mode will guarantee the fastest result but | |
| 33 | the I2C bus will be busy during that time. By default, non-blocking mode | |
| 34 | is used. Make sure clock-stretching works properly on your device if you | |
| 35 | want to use blocking mode. | |
| 36 | 2. high or low accuracy. High accuracy is used by default and using it is | |
| 37 | strongly recommended. | |
| 38 | ||
| 39 | sysfs-Interface | |
| 40 | --------------- | |
| 41 | ||
| 42 | temp1_input - temperature input | |
| 43 | humidity1_input - humidity input |