1MediaTek MT6397/MT6323 Multifunction Device Driver 2 3MT6397/MT6323 is a multifunction device with the following sub modules: 4- Regulator 5- RTC 6- Audio codec 7- GPIO 8- Clock 9- LED 10- Keys 11- Power controller 12 13It is interfaced to host controller using SPI interface by a proprietary hardware 14called 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.yaml 17 18This document describes the binding for MFD device and its sub module. 19 20Required properties: 21compatible: 22 "mediatek,mt6323" for PMIC MT6323 23 "mediatek,mt6331" for PMIC MT6331 and MT6332 24 "mediatek,mt6357" for PMIC MT6357 25 "mediatek,mt6358" for PMIC MT6358 26 "mediatek,mt6359" for PMIC MT6359 27 "mediatek,mt6366", "mediatek,mt6358" for PMIC MT6366 28 "mediatek,mt6397" for PMIC MT6397 29 30Optional subnodes: 31 32- rtc 33 Required properties: Should be one of follows 34 - 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.txt 39- regulators 40 Required properties: 41 - compatible: "mediatek,mt6323-regulator" 42 see ../regulator/mt6323-regulator.txt 43 - compatible: "mediatek,mt6358-regulator" 44 - compatible: "mediatek,mt6366-regulator", "mediatek-mt6358-regulator" 45 see ../regulator/mt6358-regulator.txt 46 - compatible: "mediatek,mt6397-regulator" 47 see ../regulator/mt6397-regulator.txt 48- codec 49 Required properties: 50 - compatible: "mediatek,mt6397-codec" or "mediatek,mt6358-sound" 51- clk 52 Required properties: 53 - compatible: "mediatek,mt6397-clk" 54- led 55 Required properties: 56 - compatible: "mediatek,mt6323-led" 57 see ../leds/leds-mt6323.txt 58 59- keys 60 Required properties: Should be one of the following 61 - compatible: "mediatek,mt6323-keys" 62 - compatible: "mediatek,mt6331-keys" 63 - compatible: "mediatek,mt6397-keys" 64 see ../input/mtk-pmic-keys.txt 65 66- power-controller 67 Required properties: 68 - compatible: "mediatek,mt6323-pwrc" 69 For details, see ../power/reset/mt6323-poweroff.txt 70 71- pin-controller 72 Required properties: 73 - compatible: "mediatek,mt6397-pinctrl" 74 For details, see ../pinctrl/pinctrl-mt65xx.txt 75 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