linux-arkmicro/linux/Documentation/devicetree/bindings/iio/adc/max11100.txt

* Maxim max11100 Analog to Digital Converter (ADC)

Required properties:
  - compatible: Should be "maxim,max11100"
  - reg: the adc unit address
  - vref-supply: phandle to the regulator that provides reference voltage

Optional properties:
  - spi-max-frequency: SPI maximum frequency

Example:

max11100: adc@0 {
        compatible = "maxim,max11100";
        reg = <0>;
        vref-supply = <&adc0_vref>;
        spi-max-frequency = <240000>;
};