Add device tree binding support for I2C Controller in GENI based
QUP Wrapper.
Signed-off-by: Sagar Dharia <sdharia@xxxxxxxxxxxxxx>
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@xxxxxxxxxxxxxx>
---
.../devicetree/bindings/i2c/i2c-qcom-geni.txt | 39 ++++++++++++++++++++++
1 file changed, 39 insertions(+)
create mode 100644 Documentation/devicetree/bindings/i2c/i2c-qcom-geni.txt
diff --git a/Documentation/devicetree/bindings/i2c/i2c-qcom-geni.txt b/Documentation/devicetree/bindings/i2c/i2c-qcom-geni.txt
new file mode 100644
index 0000000..d2fa9ce
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/i2c-qcom-geni.txt
@@ -0,0 +1,39 @@
+Qualcomm Technologies Inc. GENI based I2C Controller driver
+
+Required properties:
+ - compatible: Should be:
+ * "qcom,i2c-geni.
+ - reg: Should contain QUP register address and length.
+ - interrupts: Should contain I2C interrupt.
+ - clocks: Serial engine core clock, and AHB clocks needed by the device.
+ - pinctrl-names/pinctrl-0/1: The GPIOs assigned to this core. The names
+ should be "active" and "sleep" for the pin confuguration when core is active
+ or when entering sleep state.
+ - #address-cells: Should be <1> Address cells for i2c device address
+ - #size-cells: Should be <0> as i2c addresses have no size component
+ - qcom,wrapper-core: Wrapper QUP core containing this I2C controller.
+
+Optional property:
+ - qcom,clk-freq-out : Desired I2C bus clock frequency in Hz.
+ When missing default to 400000Hz.
+
+Child nodes should conform to i2c bus binding.
+
+Example:
+
+i2c@a94000 {
+ compatible = "qcom,i2c-geni";
+ reg = <0xa94000 0x4000>;
+ interrupts = <GIC_SPI 358 0>;
+ clock-names = "se-clk", "m-ahb", "s-ahb";
+ clocks = <&clock_gcc GCC_QUPV3_WRAP0_S5_CLK>,
+ <&clock_gcc GCC_QUPV3_WRAP_0_M_AHB_CLK>,
+ <&clock_gcc GCC_QUPV3_WRAP_0_S_AHB_CLK>;
+ pinctrl-names = "default", "sleep";
+ pinctrl-0 = <&qup_1_i2c_5_active>;
+ pinctrl-1 = <&qup_1_i2c_5_sleep>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ qcom,wrapper-core = <&qup_0>;
+ qcom,clk-freq-out = <400000>;
+};
--
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a Linux Foundation Collaborative Project
