linux-kernel - Re: [PATCH v2 1/2] dt-bindings: i2c: Add Spreadtrum I2C controller documentation

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Date:   Mon, 26 Jun 2017 10:40:47 +0800
From:   Baolin Wang <baolin.wang@...eadtrum.com>
To:     Rob Herring <robh@...nel.org>
CC:     <wsa@...-dreams.de>, <mark.rutland@....com>,
        <linux-i2c@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <broonie@...nel.org>,
        <baolin.wang@...aro.org>
Subject: Re: [PATCH v2 1/2] dt-bindings: i2c: Add Spreadtrum I2C controller
 documentation

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@...eadtrum.com>
> > ---
> > 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@...00000 {
> > +	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
> >