projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1a539d37 TP |
1 | Kernel driver shtc1 |
| 2 | =================== | |
| 3 | ||
| 4 | Supported chips: | |
| b04f2f7d | 5 | |
| 1a539d37 | 6 | * Sensirion SHTC1 |
| b04f2f7d | 7 | |
| 1a539d37 | 8 | Prefix: 'shtc1' |
| b04f2f7d | 9 | |
| 1a539d37 | 10 | Addresses scanned: none |
| b04f2f7d | 11 | |
| 1a539d37 TP |
12 | Datasheet: http://www.sensirion.com/file/datasheet_shtc1 |
| 13 | ||
| b04f2f7d MCC |
14 | |
| 15 | ||
| 1a539d37 | 16 | * Sensirion SHTW1 |
| b04f2f7d | 17 | |
| 1a539d37 | 18 | Prefix: 'shtw1' |
| b04f2f7d | 19 | |
| 1a539d37 | 20 | Addresses scanned: none |
| b04f2f7d | 21 | |
| 1a539d37 TP |
22 | Datasheet: Not publicly available |
| 23 | ||
| b04f2f7d MCC |
24 | |
| 25 | ||
| 1a539d37 | 26 | Author: |
| b04f2f7d | 27 | |
| 1a539d37 TP |
28 | Johannes Winkelmann <johannes.winkelmann@sensirion.com> |
| 29 | ||
| 30 | Description | |
| 31 | ----------- | |
| 32 | ||
| 33 | This driver implements support for the Sensirion SHTC1 chip, a humidity and | |
| 34 | temperature sensor. Temperature is measured in degrees celsius, relative | |
| 35 | humidity is expressed as a percentage. Driver can be used as well for SHTW1 | |
| 36 | chip, which has the same electrical interface. | |
| 37 | ||
| 38 | The device communicates with the I2C protocol. All sensors are set to I2C | |
| 39 | address 0x70. See Documentation/i2c/instantiating-devices for methods to | |
| 40 | instantiate the device. | |
| 41 | ||
| 42 | There are two options configurable by means of shtc1_platform_data: | |
| b04f2f7d | 43 | |
| 1a539d37 TP |
44 | 1. blocking (pull the I2C clock line down while performing the measurement) or |
| 45 | non-blocking mode. Blocking mode will guarantee the fastest result but | |
| 46 | the I2C bus will be busy during that time. By default, non-blocking mode | |
| 47 | is used. Make sure clock-stretching works properly on your device if you | |
| 48 | want to use blocking mode. | |
| 49 | 2. high or low accuracy. High accuracy is used by default and using it is | |
| 50 | strongly recommended. | |
| 51 | ||
| 52 | sysfs-Interface | |
| 53 | --------------- | |
| 54 | ||
| b04f2f7d MCC |
55 | temp1_input |
| 56 | - temperature input | |
| 57 | humidity1_input | |
| 58 | - humidity input |