
/ {
        adc_keys: adc-keys { 
                status = "okay";
                compatible = "adc-keys";
                io-channels = <&saradc 1>;
                io-channel-names = "buttons";
                keyup-threshold-microvolt = <1800000>;
                poll-interval = <100>;

                vol-up-key {
                        label = "volume up";
                        linux,code = <KEY_VOLUMEUP>;
                        press-threshold-microvolt = <1750>;
                };

                vol-down-key {
                        linux,code = <KEY_VOLUMEDOWN>;
                        label = "volume down";
                        press-threshold-microvolt = <414000>;
                };

                menu-key {
                        linux,code = <KEY_MENU>;
                        label = "menu";
                        press-threshold-microvolt = <800000>;
                };

                back-key {
                        linux,code = <KEY_BACK>;
                        label = "back";
                        press-threshold-microvolt = <1200000>;
                };
        };
};