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+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
+- Power controller
+
+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:
+../soc/mediatek/mediatek,pwrap.yaml
+
+This document describes the binding for MFD device and its sub module.
+
+Required properties:
+compatible:
+ "mediatek,mt6323" for PMIC MT6323
+ "mediatek,mt6331" for PMIC MT6331 and MT6332
+ "mediatek,mt6357" for PMIC MT6357
+ "mediatek,mt6358" for PMIC MT6358
+ "mediatek,mt6359" for PMIC MT6359
+ "mediatek,mt6366", "mediatek,mt6358" for PMIC MT6366
+ "mediatek,mt6397" for PMIC MT6397
+
+Optional subnodes:
+
+- rtc
+ Required properties: Should be one of follows
+ - compatible: "mediatek,mt6323-rtc"
+ - compatible: "mediatek,mt6331-rtc"
+ - compatible: "mediatek,mt6358-rtc"
+ - compatible: "mediatek,mt6397-rtc"
+ For details, see ../rtc/rtc-mt6397.txt
+- regulators
+ Required properties:
+ - compatible: "mediatek,mt6323-regulator"
+ see ../regulator/mt6323-regulator.txt
+ - compatible: "mediatek,mt6358-regulator"
+ - compatible: "mediatek,mt6366-regulator", "mediatek-mt6358-regulator"
+ see ../regulator/mt6358-regulator.txt
+ - compatible: "mediatek,mt6397-regulator"
+ see ../regulator/mt6397-regulator.txt
+- codec
+ Required properties:
+ - compatible: "mediatek,mt6397-codec" or "mediatek,mt6358-sound"
+- clk
+ Required properties:
+ - compatible: "mediatek,mt6397-clk"
+- led
+ Required properties:
+ - compatible: "mediatek,mt6323-led"
+ see ../leds/leds-mt6323.txt
+
+- keys
+ Required properties: Should be one of the following
+ - compatible: "mediatek,mt6323-keys"
+ - compatible: "mediatek,mt6331-keys"
+ - compatible: "mediatek,mt6397-keys"
+ see ../input/mtk-pmic-keys.txt
+
+- power-controller
+ Required properties:
+ - compatible: "mediatek,mt6323-pwrc"
+ For details, see ../power/reset/mt6323-poweroff.txt
+
+- pin-controller
+ Required properties:
+ - compatible: "mediatek,mt6397-pinctrl"
+ For details, see ../pinctrl/pinctrl-mt65xx.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>;
+ };
+ };
+ };
+ };