MediaTek MT6397/MT6323 Multifunction Device Driver
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MT6397/MT6323 is a multifunction device with the following sub modules:
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- Regulator
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- RTC
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- Audio codec
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- GPIO
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- Clock
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- LED
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- Keys
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It is interfaced to host controller using SPI interface by a proprietary hardware
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called PMIC wrapper or pwrap. MT6397/MT6323 MFD is a child device of pwrap.
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See the following for pwarp node definitions:
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Documentation/devicetree/bindings/soc/mediatek/pwrap.txt
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This document describes the binding for MFD device and its sub module.
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Required properties:
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compatible: "mediatek,mt6397" or "mediatek,mt6323"
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Optional subnodes:
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- rtc
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Required properties:
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- compatible: "mediatek,mt6397-rtc"
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- regulators
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Required properties:
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- compatible: "mediatek,mt6397-regulator"
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see Documentation/devicetree/bindings/regulator/mt6397-regulator.txt
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- compatible: "mediatek,mt6323-regulator"
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see Documentation/devicetree/bindings/regulator/mt6323-regulator.txt
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- codec
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Required properties:
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- compatible: "mediatek,mt6397-codec"
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- clk
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Required properties:
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- compatible: "mediatek,mt6397-clk"
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- led
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Required properties:
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- compatible: "mediatek,mt6323-led"
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see Documentation/devicetree/bindings/leds/leds-mt6323.txt
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- keys
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Required properties:
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- compatible: "mediatek,mt6397-keys" or "mediatek,mt6323-keys"
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see Documentation/devicetree/bindings/input/mtk-pmic-keys.txt
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Example:
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pwrap: pwrap@1000f000 {
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compatible = "mediatek,mt8135-pwrap";
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...
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pmic {
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compatible = "mediatek,mt6397";
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codec: mt6397codec {
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compatible = "mediatek,mt6397-codec";
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};
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regulators {
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compatible = "mediatek,mt6397-regulator";
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mt6397_vpca15_reg: buck_vpca15 {
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regulator-compatible = "buck_vpca15";
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regulator-name = "vpca15";
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regulator-min-microvolt = <850000>;
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regulator-max-microvolt = <1400000>;
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regulator-ramp-delay = <12500>;
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regulator-always-on;
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};
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mt6397_vgp4_reg: ldo_vgp4 {
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regulator-compatible = "ldo_vgp4";
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regulator-name = "vgp4";
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regulator-min-microvolt = <1200000>;
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regulator-max-microvolt = <3300000>;
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regulator-enable-ramp-delay = <218>;
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};
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};
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};
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};
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