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70 lines
2.6 KiB
70 lines
2.6 KiB
MediaTek PMIC Wrapper Driver |
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This document describes the binding for the MediaTek PMIC wrapper. |
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On MediaTek SoCs the PMIC is connected via SPI. The SPI master interface |
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is not directly visible to the CPU, but only through the PMIC wrapper |
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inside the SoC. The communication between the SoC and the PMIC can |
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optionally be encrypted. Also a non standard Dual IO SPI mode can be |
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used to increase speed. |
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IP Pairing |
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on MT8135 the pins of some SoC internal peripherals can be on the PMIC. |
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The signals of these pins are routed over the SPI bus using the pwrap |
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bridge. In the binding description below the properties needed for bridging |
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are marked with "IP Pairing". These are optional on SoCs which do not support |
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IP Pairing |
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Required properties in pwrap device node. |
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- compatible: |
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"mediatek,mt2701-pwrap" for MT2701/7623 SoCs |
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"mediatek,mt6765-pwrap" for MT6765 SoCs |
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"mediatek,mt6779-pwrap" for MT6779 SoCs |
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"mediatek,mt6797-pwrap" for MT6797 SoCs |
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"mediatek,mt6873-pwrap" for MT6873/8192 SoCs |
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"mediatek,mt7622-pwrap" for MT7622 SoCs |
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"mediatek,mt8135-pwrap" for MT8135 SoCs |
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"mediatek,mt8173-pwrap" for MT8173 SoCs |
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"mediatek,mt8183-pwrap" for MT8183 SoCs |
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"mediatek,mt8195-pwrap" for MT8195 SoCs |
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"mediatek,mt8516-pwrap" for MT8516 SoCs |
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- interrupts: IRQ for pwrap in SOC |
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- reg-names: Must include the following entries: |
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"pwrap": Main registers base |
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"pwrap-bridge": bridge base (IP Pairing) |
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- reg: Must contain an entry for each entry in reg-names. |
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- reset-names: Must include the following entries: |
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"pwrap" |
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"pwrap-bridge" (IP Pairing) |
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- resets: Must contain an entry for each entry in reset-names. |
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- clock-names: Must include the following entries: |
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"spi": SPI bus clock |
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"wrap": Main module clock |
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- clocks: Must contain an entry for each entry in clock-names. |
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Optional properities: |
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- pmic: Using either MediaTek PMIC MFD as the child device of pwrap |
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See the following for child node definitions: |
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Documentation/devicetree/bindings/mfd/mt6397.txt |
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or the regulator-only device as the child device of pwrap, such as MT6380. |
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See the following definitions for such kinds of devices. |
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Documentation/devicetree/bindings/regulator/mt6380-regulator.txt |
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Example: |
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pwrap: pwrap@1000f000 { |
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compatible = "mediatek,mt8135-pwrap"; |
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reg = <0 0x1000f000 0 0x1000>, |
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<0 0x11017000 0 0x1000>; |
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reg-names = "pwrap", "pwrap-bridge"; |
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interrupts = <GIC_SPI 128 IRQ_TYPE_LEVEL_HIGH>; |
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resets = <&infracfg MT8135_INFRA_PMIC_WRAP_RST>, |
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<&pericfg MT8135_PERI_PWRAP_BRIDGE_SW_RST>; |
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reset-names = "pwrap", "pwrap-bridge"; |
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clocks = <&clk26m>, <&clk26m>; |
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clock-names = "spi", "wrap"; |
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pmic { |
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compatible = "mediatek,mt6397"; |
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}; |
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};
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