Adds DT documentation for the the i2c controller for the JZ4780 SoC
Signed-off-by: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@xxxxxxxxxx>
---
.../devicetree/bindings/i2c/i2c-jz4780.txt | 38 ++++++++++++++++++++++
1 file changed, 38 insertions(+)
create mode 100644 Documentation/devicetree/bindings/i2c/i2c-jz4780.txt
diff --git a/Documentation/devicetree/bindings/i2c/i2c-jz4780.txt b/Documentation/devicetree/bindings/i2c/i2c-jz4780.txt
new file mode 100644
index 0000000..8ba2266
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/i2c-jz4780.txt
@@ -0,0 +1,38 @@
+* Ingenic JZ4780 I2C Bus controller
+
+Required properties:
+- compatible: should be "ingenic,jz4780-i2c"
+- reg: Should contain the address & size of the I2C controller registers.
+- interrupts: Should specify the interrupt provided by parent.
+- clocks: Should contain a single clock specifier for the JZ4780 I2C clock.
+- clock-frequency: desired I2C bus clock frequency in Hz.
+
+Recommended properties:
+- pinctrl-names: should be "default";
+- pinctrl-0: phandle to pinctrl function
+
+Optional properties:
+- interrupt-parent: Should be the phandle of the interrupt controller that
+ delivers interrupts to the I2C block.
+
+Example SoC file
+
+/ {
+ i2c4: i2c4@0x10054000 {
+ compatible = "ingenic,jz4780-i2c";
+ reg = <0x10054000 0x1000>;
+
+ interrupt-parent = <&intc>;
+ interrupts = <56>;
+
+ clocks = <&cgu JZ4780_CLK_SMB4>;
+ };
+};
+
+Example board file
+
+&i2c4 {
+ clock-frequency = <100000>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pins_i2c4_data>;
+}
--
1.9.1
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