On March 13, 2014 9:07:42 PM CDT, Bjorn Andersson
<bjorn.andersson@xxxxxxxxxxxxxx> wrote:
>From: "Ivan T. Ivanov" <iivanov@xxxxxxxxxx>
>
>The Qualcomm Universal Peripherial (QUP) wraps I2C mini-core and
>provide input and output FIFO's for it. I2C controller can operate
>as master with supported bus speeds of 100Kbps and 400Kbps.
>
>Signed-off-by: Ivan T. Ivanov <iivanov@xxxxxxxxxx>
>[bjorn: reformulated part of binding description
> added version to compatible
> cleaned up example]
>Signed-off-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxxxxxx>
Acked-by: Rob Herring <robh@xxxxxxxxxx>
>---
>.../devicetree/bindings/i2c/qcom,i2c-qup.txt | 46
>++++++++++++++++++++
> 1 file changed, 46 insertions(+)
>create mode 100644
>Documentation/devicetree/bindings/i2c/qcom,i2c-qup.txt
>
>diff --git a/Documentation/devicetree/bindings/i2c/qcom,i2c-qup.txt
>b/Documentation/devicetree/bindings/i2c/qcom,i2c-qup.txt
>new file mode 100644
>index 0000000..32ef64e
>--- /dev/null
>+++ b/Documentation/devicetree/bindings/i2c/qcom,i2c-qup.txt
>@@ -0,0 +1,46 @@
>+Qualcomm Universal Peripheral (QUP) I2C controller
>+
>+Required properties:
>+ - compatible: Should be:
>+ * "qcom,i2c-qup-v1.1.1" for 8660, 8960 and 8064.
>+ * "qcom,i2c-qup-v2.1.1" for 8974 v1.
>+ * "qcom,i2c-qup-v2.2.1" for 8974 v2 and later.
>+ - reg: Should contain QUP register address and length.
>+ - interrupts: Should contain I2C interrupt.
>+
>+ - clocks: A list of phandles + clock-specifiers, one for each entry
>in
>+ clock-names.
>+ - clock-names: Should contain:
>+ * "core" for the core clock
>+ * "iface" for the AHB clock
>+
>+ - #address-cells: Should be <1> Address cells for i2c device address
>+ - #size-cells: Should be <0> as i2c addresses have no size component
>+
>+Optional properties:
>+ - clock-frequency: Should specify the desired i2c bus clock frequency
>in Hz,
>+ defaults to 100kHz if omitted.
>+
>+Child nodes should conform to i2c bus binding.
>+
>+Example:
>+
>+ i2c@f9924000 {
>+ compatible = "qcom,i2c-qup-v2.2.1";
>+ reg = <0xf9924000 0x1000>;
>+ interrupts = <0 96 0>;
>+
>+ clocks = <&gcc GCC_BLSP1_QUP2_I2C_APPS_CLK>, <&gcc
>GCC_BLSP1_AHB_CLK>;
>+ clock-names = "core", "iface";
>+
>+ clock-frequency = <355000>;
>+
>+ #address-cells = <1>;
>+ #size-cells = <0>;
>+
>+ dummy@60 {
>+ compatible = "dummy";
>+ reg = <0x60>;
>+ };
>+ };
>+
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