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Diffstat (limited to 'Documentation/devicetree/bindings/i2c/i2c-mtk.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/i2c/i2c-mtk.txt | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/i2c/i2c-mtk.txt b/Documentation/devicetree/bindings/i2c/i2c-mtk.txt new file mode 100644 index 000000000000..bd5a7befd951 --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/i2c-mtk.txt @@ -0,0 +1,41 @@ +* Mediatek's I2C controller + +The Mediatek's I2C controller is used to interface with I2C devices. + +Required properties: + - compatible: value should be either of the following. + "mediatek,mt2701-i2c", "mediatek,mt6577-i2c": for Mediatek mt2701 + "mediatek,mt6577-i2c": for i2c compatible with mt6577. + "mediatek,mt6589-i2c": for i2c compatible with mt6589. + "mediatek,mt7623-i2c", "mediatek,mt6577-i2c": for i2c compatible with mt7623. + "mediatek,mt8173-i2c": for i2c compatible with mt8173. + - reg: physical base address of the controller and dma base, length of memory + mapped region. + - interrupts: interrupt number to the cpu. + - clock-div: the fixed value for frequency divider of clock source in i2c + module. Each IC may be different. + - clocks: clock name from clock manager + - clock-names: Must include "main" and "dma", if enable have-pmic need include + "pmic" extra. + +Optional properties: + - clock-frequency: Frequency in Hz of the bus when transfer, the default value + is 100000. + - mediatek,have-pmic: platform can control i2c form special pmic side. + Only mt6589 and mt8135 support this feature. + - mediatek,use-push-pull: IO config use push-pull mode. + +Example: + + i2c0: i2c@1100d000 { + compatible = "mediatek,mt6577-i2c"; + reg = <0x1100d000 0x70>, + <0x11000300 0x80>; + interrupts = <GIC_SPI 44 IRQ_TYPE_LEVEL_LOW>; + clock-frequency = <400000>; + mediatek,have-pmic; + clock-div = <16>; + clocks = <&i2c0_ck>, <&ap_dma_ck>; + clock-names = "main", "dma"; + }; + |