	adc-keys {
		compatible = "adc-keys";
		io-channels = <&saradc 0>;
		io-channel-names = "buttons";
		keyup-threshold-microvolt = <1800000>;
		u-boot,dm-spl;
		status = "okay";

		volumeup-key {
			u-boot,dm-spl;
			linux,code = <KEY_VOLUMEUP>;
			label = "volume up";
			press-threshold-microvolt = <9>;
		};
	};
