Kernel-4.18.0-80.el8_mtk-pmic-keys

MediaTek MT6397/MT6323 PMIC Keys Device Driver

There are two key functions provided by MT6397/MT6323 PMIC, pwrkey
and homekey. The key functions are defined as the subnode of the function
node provided by MT6397/MT6323 PMIC that is being defined as one kind
of Muti-Function Device (MFD)

For MT6397/MT6323 MFD bindings see:
Documentation/devicetree/bindings/mfd/mt6397.txt

Required properties:

• compatible: “mediatek,mt6397-keys” or “mediatek,mt6323-keys”
• linux,keycodes: See Documentation/devicetree/bindings/input/keys.txt

Optional Properties:

• wakeup-source: See Documentation/devicetree/bindings/power/wakeup-source.txt
• mediatek,long-press-mode: Long press key shutdown setting, 1 for
  pwrkey only, 2 for pwrkey/homekey together, others for disabled.
• power-off-time-sec: See Documentation/devicetree/bindings/input/keys.txt

Example:

pmic: mt6397 {
    compatible = "mediatek,mt6397";

    ...

    mt6397keys: mt6397keys {
        compatible = "mediatek,mt6397-keys";
        mediatek,long-press-mode = <1>;
        power-off-time-sec = <0>;

        power {
            linux,keycodes = <116>;
            wakeup-source;
        };

        home {
            linux,keycodes = <114>;
        };
    };

};