Kernel-4.18.0-80.el8_mt6397

MediaTek MT6397/MT6323 Multifunction Device Driver

MT6397/MT6323 is a multifunction device with the following sub modules:

• Regulator
• RTC
• Audio codec
• GPIO
• Clock
• LED
• Keys

It is interfaced to host controller using SPI interface by a proprietary hardware
called PMIC wrapper or pwrap. MT6397/MT6323 MFD is a child device of pwrap.
See the following for pwarp node definitions:
Documentation/devicetree/bindings/soc/mediatek/pwrap.txt

This document describes the binding for MFD device and its sub module.

Required properties:
compatible: “mediatek,mt6397” or “mediatek,mt6323”

Optional subnodes:

• rtc
  Required properties:

    - compatible: "mediatek,mt6397-rtc"
  

• regulators
  Required properties:

    - compatible: "mediatek,mt6397-regulator"
  

  see Documentation/devicetree/bindings/regulator/mt6397-regulator.txt

    - compatible: "mediatek,mt6323-regulator"
  

  see Documentation/devicetree/bindings/regulator/mt6323-regulator.txt

• codec
  Required properties:

    - compatible: "mediatek,mt6397-codec"
  

• clk
  Required properties:

    - compatible: "mediatek,mt6397-clk"
  

• led
  Required properties:

    - compatible: "mediatek,mt6323-led"
  

  see Documentation/devicetree/bindings/leds/leds-mt6323.txt

• keys
  Required properties:

    - compatible: "mediatek,mt6397-keys" or "mediatek,mt6323-keys"
  

  see Documentation/devicetree/bindings/input/mtk-pmic-keys.txt

Example:
pwrap: pwrap@1000f000 {
compatible = “mediatek,mt8135-pwrap”;

    ...

    pmic {
        compatible = "mediatek,mt6397";

        codec: mt6397codec {
            compatible = "mediatek,mt6397-codec";
        };

        regulators {
            compatible = "mediatek,mt6397-regulator";

            mt6397_vpca15_reg: buck_vpca15 {
                regulator-compatible = "buck_vpca15";
                regulator-name = "vpca15";
                regulator-min-microvolt = <850000>;
                regulator-max-microvolt = <1400000>;
                regulator-ramp-delay = <12500>;
                regulator-always-on;
            };

            mt6397_vgp4_reg: ldo_vgp4 {
                regulator-compatible = "ldo_vgp4";
                regulator-name = "vgp4";
                regulator-min-microvolt = <1200000>;
                regulator-max-microvolt = <3300000>;
                regulator-enable-ramp-delay = <218>;
            };
        };
    };
};