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    SubjectRe: [PATCH 1/3] dt-bindings: Add I2C bindings for mt65xx/mt81xx.
    From
    2014-10-29 6:37 GMT+01:00 Xudong Chen <xudong.chen@mediatek.com>:
    > Add devicetree bindings for Mediatek Soc I2C driver.
    >
    > Signed-off-by: Xudong Chen <xudong.chen@mediatek.com>
    > ---
    > .../devicetree/bindings/i2c/i2c-mt6577.txt | 37 ++++++++++++++++++++++
    > 1 file changed, 37 insertions(+)
    > create mode 100644 Documentation/devicetree/bindings/i2c/i2c-mt6577.txt
    >
    > diff --git a/Documentation/devicetree/bindings/i2c/i2c-mt6577.txt b/Documentation/devicetree/bindings/i2c/i2c-mt6577.txt
    > new file mode 100644
    > index 0000000..b4012c8
    > --- /dev/null
    > +++ b/Documentation/devicetree/bindings/i2c/i2c-mt6577.txt
    > @@ -0,0 +1,37 @@
    > +* 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.
    > + (a) "mtk,mt6577-i2c", for i2c compatible with mt6577 i2c.

    Looking on the datasheet of mt6577 it does not seem that this driver
    is really compatible.
    I was not able to find the PATH_DIR register neither in the datasheet
    nor in the source code.

    > + (b) "mtk,mt8127-i2c", for i2c compatible with mt8127 i2c.
    > + (c) "mtk,mt8135-i2c", for i2c compatible with mt8135 i2c.
    > + - 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: clock name used in i2c driver probe
    > +
    > +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.
    > + - mediatek,have-dcm: platform has DCM(hardware digital clock manager) property.
    > + - mediatek,use-push-pull: IO 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 = <100000>;
    > + mediatek,have-pmic;
    > + clock-div = <16>;
    > + clocks = <&i2c0_ck>, <&ap_dma_ck>;
    > + clock-names = "main", "dma";
    > + };
    > +
    > --
    > 1.8.1.1.dirty
    >



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    motzblog.wordpress.com


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