1MediaTek PMIC Wrapper Driver 2 3This document describes the binding for the MediaTek PMIC wrapper. 4 5On MediaTek SoCs the PMIC is connected via SPI. The SPI master interface 6is not directly visible to the CPU, but only through the PMIC wrapper 7inside the SoC. The communication between the SoC and the PMIC can 8optionally be encrypted. Also a non standard Dual IO SPI mode can be 9used to increase speed. 10 11IP Pairing 12 13on MT8135 the pins of some SoC internal peripherals can be on the PMIC. 14The signals of these pins are routed over the SPI bus using the pwrap 15bridge. In the binding description below the properties needed for bridging 16are marked with "IP Pairing". These are optional on SoCs which do not support 17IP Pairing 18 19Required properties in pwrap device node. 20- compatible: 21 "mediatek,mt2701-pwrap" for MT2701/7623 SoCs 22 "mediatek,mt6765-pwrap" for MT6765 SoCs 23 "mediatek,mt6779-pwrap" for MT6779 SoCs 24 "mediatek,mt6797-pwrap" for MT6797 SoCs 25 "mediatek,mt6873-pwrap" for MT6873/8192 SoCs 26 "mediatek,mt7622-pwrap" for MT7622 SoCs 27 "mediatek,mt8135-pwrap" for MT8135 SoCs 28 "mediatek,mt8173-pwrap" for MT8173 SoCs 29 "mediatek,mt8183-pwrap" for MT8183 SoCs 30 "mediatek,mt8186-pwrap" for MT8186 SoCs 31 "mediatek,mt8188-pwrap", "mediatek,mt8195-pwrap" for MT8188 SoCs 32 "mediatek,mt8195-pwrap" for MT8195 SoCs 33 "mediatek,mt8516-pwrap" for MT8516 SoCs 34- interrupts: IRQ for pwrap in SOC 35- reg-names: "pwrap" is required; "pwrap-bridge" is optional. 36 "pwrap": Main registers base 37 "pwrap-bridge": bridge base (IP Pairing) 38- reg: Must contain an entry for each entry in reg-names. 39- clock-names: Must include the following entries: 40 "spi": SPI bus clock 41 "wrap": Main module clock 42- clocks: Must contain an entry for each entry in clock-names. 43 44Optional properities: 45- reset-names: Some SoCs include the following entries: 46 "pwrap" 47 "pwrap-bridge" (IP Pairing) 48- resets: Must contain an entry for each entry in reset-names. 49- pmic: Using either MediaTek PMIC MFD as the child device of pwrap 50 See the following for child node definitions: 51 Documentation/devicetree/bindings/mfd/mt6397.txt 52 or the regulator-only device as the child device of pwrap, such as MT6380. 53 See the following definitions for such kinds of devices. 54 Documentation/devicetree/bindings/regulator/mt6380-regulator.txt 55 56Example: 57 pwrap: pwrap@1000f000 { 58 compatible = "mediatek,mt8135-pwrap"; 59 reg = <0 0x1000f000 0 0x1000>, 60 <0 0x11017000 0 0x1000>; 61 reg-names = "pwrap", "pwrap-bridge"; 62 interrupts = <GIC_SPI 128 IRQ_TYPE_LEVEL_HIGH>; 63 resets = <&infracfg MT8135_INFRA_PMIC_WRAP_RST>, 64 <&pericfg MT8135_PERI_PWRAP_BRIDGE_SW_RST>; 65 reset-names = "pwrap", "pwrap-bridge"; 66 clocks = <&clk26m>, <&clk26m>; 67 clock-names = "spi", "wrap"; 68 69 pmic { 70 compatible = "mediatek,mt6397"; 71 }; 72 }; 73