dt: bindings: add documentation for zx2967 family i2c controller

This patch adds dt-binding documentation for zx2967 family
i2c controller.

Signed-off-by: Baoyou Xie <baoyou.xie@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

diff --git a/Documentation/devicetree/bindings/i2c/i2c-zx2967.txt b/Documentation/devicetree/bindings/i2c/i2c-zx2967.txt
new file mode 100644 (file)
index 0000000..cb806d1
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/i2c-zx2967.txt
@@ -0,0 +1,22 @@
+ZTE zx2967 I2C controller
+
+Required properties:
+ - compatible: must be "zte,zx296718-i2c"
+ - reg: physical address and length of the device registers
+ - interrupts: a single interrupt specifier
+ - clocks: clock for the device
+ - #address-cells: should be <1>
+ - #size-cells: should be <0>
+ - clock-frequency: the desired I2C bus clock frequency.
+
+Examples:
+
+       i2c@112000 {
+               compatible = "zte,zx296718-i2c";
+               reg = <0x00112000 0x1000>;
+               interrupts = <GIC_SPI 112 IRQ_TYPE_LEVEL_HIGH>;
+               clocks = <&osc24m>;
+               #address-cells = <1>
+               #size-cells = <0>;
+               clock-frequency = <1600000>;
+       };