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 and MT6366 26 "mediatek,mt6359" for PMIC MT6359 27 "mediatek,mt6397" for PMIC MT6397 28 29Optional subnodes: 30 31- rtc 32 Required properties: Should be one of follows 33 - compatible: "mediatek,mt6323-rtc" 34 - compatible: "mediatek,mt6331-rtc" 35 - compatible: "mediatek,mt6358-rtc" 36 - compatible: "mediatek,mt6397-rtc" 37 For details, see ../rtc/rtc-mt6397.txt 38- regulators 39 Required properties: 40 - compatible: "mediatek,mt6323-regulator" 41 see ../regulator/mt6323-regulator.txt 42 - compatible: "mediatek,mt6358-regulator" 43 see ../regulator/mt6358-regulator.txt 44 - compatible: "mediatek,mt6397-regulator" 45 see ../regulator/mt6397-regulator.txt 46- codec 47 Required properties: 48 - compatible: "mediatek,mt6397-codec" or "mediatek,mt6358-sound" 49- clk 50 Required properties: 51 - compatible: "mediatek,mt6397-clk" 52- led 53 Required properties: 54 - compatible: "mediatek,mt6323-led" 55 see ../leds/leds-mt6323.txt 56 57- keys 58 Required properties: Should be one of the following 59 - compatible: "mediatek,mt6323-keys" 60 - compatible: "mediatek,mt6331-keys" 61 - compatible: "mediatek,mt6397-keys" 62 see ../input/mtk-pmic-keys.txt 63 64- power-controller 65 Required properties: 66 - compatible: "mediatek,mt6323-pwrc" 67 For details, see ../power/reset/mt6323-poweroff.txt 68 69- pin-controller 70 Required properties: 71 - compatible: "mediatek,mt6397-pinctrl" 72 For details, see ../pinctrl/pinctrl-mt65xx.txt 73 74Example: 75 pwrap: pwrap@1000f000 { 76 compatible = "mediatek,mt8135-pwrap"; 77 78 ... 79 80 pmic { 81 compatible = "mediatek,mt6397"; 82 83 codec: mt6397codec { 84 compatible = "mediatek,mt6397-codec"; 85 }; 86 87 regulators { 88 compatible = "mediatek,mt6397-regulator"; 89 90 mt6397_vpca15_reg: buck_vpca15 { 91 regulator-compatible = "buck_vpca15"; 92 regulator-name = "vpca15"; 93 regulator-min-microvolt = <850000>; 94 regulator-max-microvolt = <1400000>; 95 regulator-ramp-delay = <12500>; 96 regulator-always-on; 97 }; 98 99 mt6397_vgp4_reg: ldo_vgp4 { 100 regulator-compatible = "ldo_vgp4"; 101 regulator-name = "vgp4"; 102 regulator-min-microvolt = <1200000>; 103 regulator-max-microvolt = <3300000>; 104 regulator-enable-ramp-delay = <218>; 105 }; 106 }; 107 }; 108 }; 109