Hi Rob,
On 五, 6月 23, 2017 at 05:20:16下午 -0500, Rob Herring wrote:
> On Wed, Jun 21, 2017 at 03:23:03PM +0800, Baolin Wang wrote:
> > This patch adds the binding documentation for Spreadtrum I2C
> > controller device.
> >
> > Signed-off-by: Baolin Wang <baolin.wang@xxxxxxxxxxxxxx>
> > ---
> > Changes since v1:
> > - No updates.
> > ---
> > Documentation/devicetree/bindings/i2c/i2c-sprd.txt | 31 ++++++++++++++++++++
> > 1 file changed, 31 insertions(+)
> > create mode 100644 Documentation/devicetree/bindings/i2c/i2c-sprd.txt
> >
> > diff --git a/Documentation/devicetree/bindings/i2c/i2c-sprd.txt b/Documentation/devicetree/bindings/i2c/i2c-sprd.txt
> > new file mode 100644
> > index 0000000..f285e5b
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/i2c/i2c-sprd.txt
> > @@ -0,0 +1,31 @@
> > +I2C for Spreadtrum platforms
> > +
> > +Required properties:
> > +- compatible: Should be "sprd,r8p0-i2c".
>
> Compatible strings should be SoC specific.
Will fix this in next version. Thanks.
>
> > +- reg: Specify the physical base address of the controller and length
> > + of memory mapped region.
> > +- interrupts: Should contain I2C interrupt.
> > +- clock-names: Should contain following entries:
> > + "i2c" for I2C clock,
> > + "source" for I2C source (parent) clock,
> > + "enable" for I2C module enable clock.
> > +- clocks: Should contain a clock specifier for each entry in clock-names.
> > +- clock-frequency: Constains desired I2C bus clock frequency in Hz.
> > +- #address-cells: Should be 1 to describe address cells for I2C device address.
> > +- #size-cells: Should be 0 means no size cell for I2C device address.
> > +
> > +Optional properties:
> > +- Child nodes conforming to I2C bus binding
> > +
> > +Examples:
> > +i2c0: i2c@70500000 {
> > + compatible = "sprd,r8p0-i2c";
> > + reg = <0 0x70500000 0 0x1000>;
> > + interrupts = <GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>;
> > + clock-names = "i2c", "source", "enable";
> > + clocks = <&clk_i2c3>, <&ext_26m>, <&clk_ap_apb_gates 11>;
> > + clock-frequency = <400000>;
> > + #address-cells = <1>;
> > + #size-cells = <0>;
> > +};
> > +
> > --
> > 1.7.9.5
> >
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