tmp421.rst 1.6 KB

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  1. Kernel driver tmp421
  2. ====================
  3. Supported chips:
  4. * Texas Instruments TMP421
  5. Prefix: 'tmp421'
  6. Addresses scanned: I2C 0x2a, 0x4c, 0x4d, 0x4e and 0x4f
  7. Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp421.html
  8. * Texas Instruments TMP422
  9. Prefix: 'tmp422'
  10. Addresses scanned: I2C 0x4c, 0x4d, 0x4e and 0x4f
  11. Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp421.html
  12. * Texas Instruments TMP423
  13. Prefix: 'tmp423'
  14. Addresses scanned: I2C 0x4c and 0x4d
  15. Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp421.html
  16. * Texas Instruments TMP441
  17. Prefix: 'tmp441'
  18. Addresses scanned: I2C 0x2a, 0x4c, 0x4d, 0x4e and 0x4f
  19. Datasheet: https://www.ti.com/product/tmp441
  20. * Texas Instruments TMP442
  21. Prefix: 'tmp442'
  22. Addresses scanned: I2C 0x4c and 0x4d
  23. Datasheet: https://www.ti.com/product/tmp442
  24. Authors:
  25. Andre Prendel <andre.prendel@gmx.de>
  26. Description
  27. -----------
  28. This driver implements support for Texas Instruments TMP421, TMP422,
  29. TMP423, TMP441, and TMP442 temperature sensor chips. These chips
  30. implement one local and up to one (TMP421, TMP441), up to two (TMP422,
  31. TMP442) or up to three (TMP423) remote sensors. Temperature is measured
  32. in degrees Celsius. The chips are wired over I2C/SMBus and specified
  33. over a temperature range of -40 to +125 degrees Celsius. Resolution
  34. for both the local and remote channels is 0.0625 degree C.
  35. The chips support only temperature measurement. The driver exports
  36. the temperature values via the following sysfs files:
  37. **temp[1-4]_input**
  38. **temp[2-4]_fault**