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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/sys/contrib/device-tree/Bindings/i2c/i2c-mt65xx.txt
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* MediaTek's I2C controller

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The MediaTek's I2C controller is used to interface with I2C devices.

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Required properties:

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  - compatible: value should be either of the following.

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      "mediatek,mt2701-i2c", "mediatek,mt6577-i2c": for MediaTek MT2701

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      "mediatek,mt2712-i2c": for MediaTek MT2712

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      "mediatek,mt6577-i2c": for MediaTek MT6577

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      "mediatek,mt6589-i2c": for MediaTek MT6589

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      "mediatek,mt6797-i2c", "mediatek,mt6577-i2c": for MediaTek MT6797

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      "mediatek,mt7622-i2c": for MediaTek MT7622

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      "mediatek,mt7623-i2c", "mediatek,mt6577-i2c": for MediaTek MT7623

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      "mediatek,mt7629-i2c", "mediatek,mt2712-i2c": for MediaTek MT7629

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      "mediatek,mt8168-i2c": for MediaTek MT8168

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      "mediatek,mt8173-i2c": for MediaTek MT8173

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      "mediatek,mt8183-i2c": for MediaTek MT8183

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      "mediatek,mt8186-i2c": for MediaTek MT8186

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      "mediatek,mt8192-i2c": for MediaTek MT8192

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      "mediatek,mt8195-i2c", "mediatek,mt8192-i2c": for MediaTek MT8195

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      "mediatek,mt8516-i2c", "mediatek,mt2712-i2c": for MediaTek MT8516

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  - reg: physical base address of the controller and dma base, length of memory

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    mapped region.

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  - interrupts: interrupt number to the cpu.

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  - clock-div: the fixed value for frequency divider of clock source in i2c

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    module. Each IC may be different.

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  - clocks: clock name from clock manager

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  - clock-names: Must include "main" and "dma", "arb" is for multi-master that

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    one bus has more than two i2c controllers, if enable have-pmic need include

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    "pmic" extra.

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Optional properties:

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  - clock-frequency: Frequency in Hz of the bus when transfer, the default value

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    is 100000.

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  - mediatek,have-pmic: platform can control i2c form special pmic side.

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    Only mt6589 and mt8135 support this feature.

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  - mediatek,use-push-pull: IO config use push-pull mode.

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  - vbus-supply: phandle to the regulator that provides power to SCL/SDA.

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Example:

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	i2c0: i2c@1100d000 {

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			compatible = "mediatek,mt6577-i2c";

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			reg = <0x1100d000 0x70>,

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			      <0x11000300 0x80>;

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			interrupts = <GIC_SPI 44 IRQ_TYPE_LEVEL_LOW>;

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			clock-frequency = <400000>;

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			mediatek,have-pmic;

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			clock-div = <16>;

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			clocks = <&i2c0_ck>, <&ap_dma_ck>;

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			clock-names = "main", "dma";

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	};

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