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1MediaTek MT6397/MT6323 Multifunction Device Driver2 3MT6397/MT6323 is a multifunction device with the following sub modules:4- Regulator5- RTC6- Audio codec7- GPIO8- Clock9- LED10- Keys11- Power controller12 13It is interfaced to host controller using SPI interface by a proprietary hardware14called PMIC wrapper or pwrap. MT6397/MT6323 MFD is a child device of pwrap.15See the following for pwarp node definitions:16../soc/mediatek/mediatek,pwrap.yaml17 18This document describes the binding for MFD device and its sub module.19 20Required properties:21compatible:22 "mediatek,mt6323" for PMIC MT632323 "mediatek,mt6331" for PMIC MT6331 and MT633224 "mediatek,mt6357" for PMIC MT635725 "mediatek,mt6358" for PMIC MT635826 "mediatek,mt6359" for PMIC MT635927 "mediatek,mt6366", "mediatek,mt6358" for PMIC MT636628 "mediatek,mt6397" for PMIC MT639729 30Optional subnodes:31 32- rtc33 Required properties: Should be one of follows34 - compatible: "mediatek,mt6323-rtc"35 - compatible: "mediatek,mt6331-rtc"36 - compatible: "mediatek,mt6358-rtc"37 - compatible: "mediatek,mt6397-rtc"38 For details, see ../rtc/rtc-mt6397.txt39- regulators40 Required properties:41 - compatible: "mediatek,mt6323-regulator"42 see ../regulator/mt6323-regulator.txt43 - compatible: "mediatek,mt6358-regulator"44 - compatible: "mediatek,mt6366-regulator", "mediatek-mt6358-regulator"45 see ../regulator/mt6358-regulator.txt46 - compatible: "mediatek,mt6397-regulator"47 see ../regulator/mt6397-regulator.txt48- codec49 Required properties:50 - compatible: "mediatek,mt6397-codec" or "mediatek,mt6358-sound"51- clk52 Required properties:53 - compatible: "mediatek,mt6397-clk"54- led55 Required properties:56 - compatible: "mediatek,mt6323-led"57 see ../leds/leds-mt6323.txt58 59- keys60 Required properties: Should be one of the following61 - compatible: "mediatek,mt6323-keys"62 - compatible: "mediatek,mt6331-keys"63 - compatible: "mediatek,mt6397-keys"64 see ../input/mtk-pmic-keys.txt65 66- power-controller67 Required properties:68 - compatible: "mediatek,mt6323-pwrc"69 For details, see ../power/reset/mt6323-poweroff.txt70 71- pin-controller72 Required properties:73 - compatible: "mediatek,mt6397-pinctrl"74 For details, see ../pinctrl/pinctrl-mt65xx.txt75 76Example:77 pwrap: pwrap@1000f000 {78 compatible = "mediatek,mt8135-pwrap";79 80 ...81 82 pmic {83 compatible = "mediatek,mt6397";84 85 codec: mt6397codec {86 compatible = "mediatek,mt6397-codec";87 };88 89 regulators {90 compatible = "mediatek,mt6397-regulator";91 92 mt6397_vpca15_reg: buck_vpca15 {93 regulator-compatible = "buck_vpca15";94 regulator-name = "vpca15";95 regulator-min-microvolt = <850000>;96 regulator-max-microvolt = <1400000>;97 regulator-ramp-delay = <12500>;98 regulator-always-on;99 };100 101 mt6397_vgp4_reg: ldo_vgp4 {102 regulator-compatible = "ldo_vgp4";103 regulator-name = "vgp4";104 regulator-min-microvolt = <1200000>;105 regulator-max-microvolt = <3300000>;106 regulator-enable-ramp-delay = <218>;107 };108 };109 };110 };111