Re: [PATCH v3 2/3] dt-bindings: i2c: Add binding for Qualcomm CCI I2C controller

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Signed-off-by: Robert Foss <robert.foss@xxxxxxxxxx>

On Wed, 4 Mar 2020 at 17:49, Loic Poulain <loic.poulain@xxxxxxxxxx> wrote:
>
> From: Todor Tomov <todor.tomov@xxxxxxxxxx>
>
> Add DT binding document for Qualcomm Camera Control Interface (CCI)
> I2C controller.
>
> Signed-off-by: Todor Tomov <todor.tomov@xxxxxxxxxx>
> Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx>
> Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
> ---
>  v2: Fix subnode properties, remove mandatory clock names
>  v3: Add sdm845 compatible string
>
>  .../devicetree/bindings/i2c/i2c-qcom-cci.txt       | 92 ++++++++++++++++++++++
>  1 file changed, 92 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/i2c/i2c-qcom-cci.txt
>
> diff --git a/Documentation/devicetree/bindings/i2c/i2c-qcom-cci.txt b/Documentation/devicetree/bindings/i2c/i2c-qcom-cci.txt
> new file mode 100644
> index 0000000..c6668b7
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/i2c/i2c-qcom-cci.txt
> @@ -0,0 +1,92 @@
> +Qualcomm Camera Control Interface (CCI) I2C controller
> +
> +PROPERTIES:
> +
> +- compatible:
> +       Usage: required
> +       Value type: <string>
> +       Definition: must be one of:
> +               "qcom,msm8916-cci"
> +               "qcom,msm8996-cci"
> +               "qcom,sdm845-cci"
> +
> +- reg
> +       Usage: required
> +       Value type: <prop-encoded-array>
> +       Definition: base address CCI I2C controller and length of memory
> +                   mapped region.
> +
> +- interrupts:
> +       Usage: required
> +       Value type: <prop-encoded-array>
> +       Definition: specifies the CCI I2C interrupt. The format of the
> +                   specifier is defined by the binding document describing
> +                   the node's interrupt parent.
> +
> +- clocks:
> +       Usage: required
> +       Value type: <prop-encoded-array>
> +       Definition: a list of phandle, should contain an entry for each
> +                   entries in clock-names.
> +
> +- clock-names
> +       Usage: required
> +       Value type: <string>
> +       Definition: a list of clock names, must include "cci" clock.
> +
> +- power-domains
> +       Usage: required for "qcom,msm8996-cci"
> +       Value type: <prop-encoded-array>
> +       Definition:
> +
> +SUBNODES:
> +
> +The CCI provides I2C masters for one (msm8916) or two i2c busses (msm8996 and
> +sdm845), described as subdevices named "i2c-bus@0" and "i2c-bus@1".
> +
> +PROPERTIES:
> +
> +- reg:
> +       Usage: required
> +       Value type: <u32>
> +       Definition: Index of the CCI bus/master
> +
> +- clock-frequency:
> +       Usage: optional
> +       Value type: <u32>
> +       Definition: Desired I2C bus clock frequency in Hz, defaults to 100
> +                   kHz if omitted.
> +
> +Example:
> +
> +       cci@a0c000 {
> +               compatible = "qcom,msm8996-cci";
> +               #address-cells = <1>;
> +               #size-cells = <0>;
> +               reg = <0xa0c000 0x1000>;
> +               interrupts = <GIC_SPI 295 IRQ_TYPE_EDGE_RISING>;
> +               clocks = <&mmcc MMSS_MMAGIC_AHB_CLK>,
> +                        <&mmcc CAMSS_TOP_AHB_CLK>,
> +                        <&mmcc CAMSS_CCI_AHB_CLK>,
> +                        <&mmcc CAMSS_CCI_CLK>,
> +                        <&mmcc CAMSS_AHB_CLK>;
> +               clock-names = "mmss_mmagic_ahb",
> +                             "camss_top_ahb",
> +                             "cci_ahb",
> +                             "cci",
> +                             "camss_ahb";
> +
> +               i2c-bus@0 {
> +                       reg = <0>;
> +                       clock-frequency = <400000>;
> +                       #address-cells = <1>;
> +                       #size-cells = <0>;
> +               };
> +
> +               i2c-bus@1 {
> +                       reg = <1>;
> +                       clock-frequency = <400000>;
> +                       #address-cells = <1>;
> +                       #size-cells = <0>;
> +               };
> +       };
> --
> 2.7.4
>



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