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- Kernel driver tmp421
- ====================
- Supported chips:
- * Texas Instruments TMP421
- Prefix: 'tmp421'
- Addresses scanned: I2C 0x2a, 0x4c, 0x4d, 0x4e and 0x4f
- Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp421.html
- * Texas Instruments TMP422
- Prefix: 'tmp422'
- Addresses scanned: I2C 0x4c, 0x4d, 0x4e and 0x4f
- Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp421.html
- * Texas Instruments TMP423
- Prefix: 'tmp423'
- Addresses scanned: I2C 0x4c and 0x4d
- Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp421.html
- * Texas Instruments TMP441
- Prefix: 'tmp441'
- Addresses scanned: I2C 0x2a, 0x4c, 0x4d, 0x4e and 0x4f
- Datasheet: https://www.ti.com/product/tmp441
- * Texas Instruments TMP442
- Prefix: 'tmp442'
- Addresses scanned: I2C 0x4c and 0x4d
- Datasheet: https://www.ti.com/product/tmp442
- Authors:
- Andre Prendel <[email protected]>
- Description
- -----------
- This driver implements support for Texas Instruments TMP421, TMP422,
- TMP423, TMP441, and TMP442 temperature sensor chips. These chips
- implement one local and up to one (TMP421, TMP441), up to two (TMP422,
- TMP442) or up to three (TMP423) remote sensors. Temperature is measured
- in degrees Celsius. The chips are wired over I2C/SMBus and specified
- over a temperature range of -40 to +125 degrees Celsius. Resolution
- for both the local and remote channels is 0.0625 degree C.
- The chips support only temperature measurement. The driver exports
- the temperature values via the following sysfs files:
- **temp[1-4]_input**
- **temp[2-4]_fault**
- Each sensor can be individually disabled via Devicetree or from sysfs
- via:
- **temp[1-4]_enable**
- If labels were specified in Devicetree, additional sysfs files will
- be present:
- **temp[1-4]_label**
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