Kernel-4.18.0-80.el8_max6650

Bindings for MAX6651 and MAX6650 I2C fan controllers

Reference:
[1] https://datasheets.maximintegrated.com/en/ds/MAX6650-MAX6651.pdf

Required properties:

• compatible : One of “maxim,max6650” or “maxim,max6651”
• reg : I2C address, one of 0x1b, 0x1f, 0x4b, 0x48.

Optional properties, default is to retain the chip’s current setting:

• maxim,fan-microvolt : The supply voltage of the fan, either 5000000 uV or

        12000000 uV.
  

• maxim,fan-prescale : Pre-scaling value, as per datasheet [1]. Lower values

        allow more fine-grained control of slower fans.
        Valid: 1, 2, 4, 8, 16.
  

• maxim,fan-target-rpm: Initial requested fan rotation speed. If specified, the

        driver selects closed-loop mode and the requested speed.
        This ensures the fan is already running before userspace
        takes over.
  

Example:
fan-max6650: max6650@1b {
reg = <0x1b>;
compatible = “maxim,max6650”;
maxim,fan-microvolt = <12000000>;
maxim,fan-prescale = <4>;
maxim,fan-target-rpm = <1200>;
};