0578c660b7
Add MT2712 i2c binding to binding file. Compare to MT8173 i2c controller, MT2712 has timing adjust registers which can adjust the internal divider of i2c source clock, SCL duty cycle, SCL compare point, start(repeated start) and stop time, SDA change time. Signed-off-by: Jun Gao <jun.gao@mediatek.com> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
44 lines
1.6 KiB
Plaintext
44 lines
1.6 KiB
Plaintext
* 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,mt7622-i2c": for MediaTek MT7622
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"mediatek,mt7623-i2c", "mediatek,mt6577-i2c": for MediaTek MT7623
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"mediatek,mt8173-i2c": for MediaTek MT8173
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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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