* Texas Instruments' ADC084S021

Required properties:
 - compatible        : Must be "ti,adc084s021"
 - reg               : SPI chip select number for the device
 - vref-supply       : The regulator supply for ADC reference voltage
 - spi-cpol          : Per spi-bus bindings
 - spi-cpha          : Per spi-bus bindings
 - spi-max-frequency : Per spi-bus bindings

Example:
adc@0 {
	compatible = "ti,adc084s021";
	reg = <0>;
	vref-supply = <&adc_vref>;
	spi-cpol;
	spi-cpha;
	spi-max-frequency = <16000000>;
};