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/pwrap.txt This document describes the binding for MFD device and its sub module. Required properties: compatible: "mediatek,mt6323" for PMIC MT6323 "mediatek,mt6358" for PMIC MT6358 "mediatek,mt6397" for PMIC MT6397 Optional subnodes: - rtc Required properties: Should be one of follows - compatible: "mediatek,mt6323-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" 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: - compatible: "mediatek,mt6397-keys" or "mediatek,mt6323-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>; }; }; }; };