Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / i2c / qcom,i2c-qup.txt

diff --git a/kernel/Documentation/devicetree/bindings/i2c/qcom,i2c-qup.txt b/kernel/Documentation/devicetree/bindings/i2c/qcom,i2c-qup.txt
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+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>;
+ };