android13/kernel-5.10/arch/arm64/boot/dts/rockchip/rk3562/rp-adc-key.dtsi

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/ {
adc_keys: adc-keys {
compatible = "adc-keys";
io-channels = <&saradc0 1>;
io-channel-names = "buttons";
keyup-threshold-microvolt = <1800000>;
poll-interval = <100>;
vol-up-key {
linux,code = <KEY_VOLUMEUP>;
label = "volume up";
press-threshold-microvolt = <17000>;
};
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>;
};
};
};