Add DT bindings documentation for hi3559a SoC clock.

Signed-off-by: Dongjiu Geng <gengdong...@huawei.com>
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 .../bindings/clock/hi3559av100-clock.txt      | 40 +++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 
Documentation/devicetree/bindings/clock/hi3559av100-clock.txt

diff --git a/Documentation/devicetree/bindings/clock/hi3559av100-clock.txt 
b/Documentation/devicetree/bindings/clock/hi3559av100-clock.txt
new file mode 100644
index 000000000000..0fb4ccc72cfe
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/hi3559av100-clock.txt
@@ -0,0 +1,40 @@
+* Hisilicon Hi3559A Clock Controller
+
+The Hi3559A clock controller generates and supplies clock to various
+controllers within the Hi3559A SoC.
+
+Required Properties:
+
+- compatible: the compatible should be one of the following strings to
+       indicate the clock controller functionality.
+
+       - "hisilicon,hi3559av100-clock"
+
+- reg: physical base address of the controller and length of memory mapped
+  region.
+
+- #clock-cells: should be 1.
+
+Each clock is assigned an identifier and client nodes use this identifier
+to specify the clock which they consume.
+
+All these identifier could be found in <dt-bindings/clock/hi3559av100-clock.h>.
+
+Examples:
+
+       clock: clock0 {
+               compatible = "hisilicon,hi3559av100-clock", "syscon";
+               #clock-cells = <1>;
+               #reset-cells = <2>;
+               #address-cells = <1>;
+               #size-cells = <1>;
+               reg = <0x0 0x12010000 0x0 0x10000>;
+       };
+
+       uart0: uart@12100000 {
+               compatible = "arm,pl011", "arm,primecell";
+               reg = <0x12100000 0x1000>;
+               interrupts = <0 6 4>;
+               clocks = <&clock HI3559AV100_UART0_CLK>;
+               clock-names = "apb_pclk";
+       };
-- 
2.17.1

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