42 lines
1.5 KiB
Plaintext
42 lines
1.5 KiB
Plaintext
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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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(a) "mediatek,mt6577-i2c", for i2c compatible with mt6577 i2c.
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(b) "mediatek,mt6589-i2c", for i2c compatible with mt6589 i2c.
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(c) "mediatek,mt8127-i2c", for i2c compatible with mt8127 i2c.
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(d) "mediatek,mt8135-i2c", for i2c compatible with mt8135 i2c.
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(e) "mediatek,mt8173-i2c", for i2c compatible with mt8173 i2c.
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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", 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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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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