adt7411.rst 1.5 KB

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  1. Kernel driver adt7411
  2. =====================
  3. Supported chips:
  4. * Analog Devices ADT7411
  5. Prefix: 'adt7411'
  6. Addresses scanned: 0x48, 0x4a, 0x4b
  7. Datasheet: Publicly available at the Analog Devices website
  8. Author: Wolfram Sang (based on adt7470 by Darrick J. Wong)
  9. Description
  10. -----------
  11. This driver implements support for the Analog Devices ADT7411 chip. There may
  12. be other chips that implement this interface.
  13. The ADT7411 can use an I2C/SMBus compatible 2-wire interface or an
  14. SPI-compatible 4-wire interface. It provides a 10-bit analog to digital
  15. converter which measures 1 temperature, vdd and 8 input voltages. It has an
  16. internal temperature sensor, but an external one can also be connected (one
  17. loses 2 inputs then). There are high- and low-limit registers for all inputs.
  18. Check the datasheet for details.
  19. sysfs-Interface
  20. ---------------
  21. ================ =================
  22. in0_input vdd voltage input
  23. in[1-8]_input analog 1-8 input
  24. temp1_input temperature input
  25. ================ =================
  26. Besides standard interfaces, this driver adds (0 = off, 1 = on):
  27. ============== =======================================================
  28. adc_ref_vdd Use vdd as reference instead of 2.25 V
  29. fast_sampling Sample at 22.5 kHz instead of 1.4 kHz, but drop filters
  30. no_average Turn off averaging over 16 samples
  31. ============== =======================================================
  32. Notes
  33. -----
  34. SPI, external temperature sensor and limit registers are not supported yet.