max6650.txt 991 B

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  1. Bindings for MAX6651 and MAX6650 I2C fan controllers
  2. Reference:
  3. [1] https://datasheets.maximintegrated.com/en/ds/MAX6650-MAX6651.pdf
  4. Required properties:
  5. - compatible : One of "maxim,max6650" or "maxim,max6651"
  6. - reg : I2C address, one of 0x1b, 0x1f, 0x4b, 0x48.
  7. Optional properties, default is to retain the chip's current setting:
  8. - maxim,fan-microvolt : The supply voltage of the fan, either 5000000 uV or
  9. 12000000 uV.
  10. - maxim,fan-prescale : Pre-scaling value, as per datasheet [1]. Lower values
  11. allow more fine-grained control of slower fans.
  12. Valid: 1, 2, 4, 8, 16.
  13. - maxim,fan-target-rpm: Initial requested fan rotation speed. If specified, the
  14. driver selects closed-loop mode and the requested speed.
  15. This ensures the fan is already running before userspace
  16. takes over.
  17. Example:
  18. fan-max6650: max6650@1b {
  19. reg = <0x1b>;
  20. compatible = "maxim,max6650";
  21. maxim,fan-microvolt = <12000000>;
  22. maxim,fan-prescale = <4>;
  23. maxim,fan-target-rpm = <1200>;
  24. };