clk: sunxi-ng: Add A80 USB CCU

Add support for the USB clock controls found on the A80.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

1 files changed, 24 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/clock/sun9i-usb.txt b/Documentation/devicetree/bindings/clock/sun9i-usb.txt
new file mode 100644
index 000000000000..3564bd4f2a20
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/sun9i-usb.txt
@@ -0,0 +1,24 @@
+Allwinner A80 USB Clock Control Binding
+---------------------------------------
+
+Required properties :
+- compatible: must contain one of the following compatibles:
+		- "allwinner,sun9i-a80-usb-clocks"
+
+- reg: Must contain the registers base address and length
+- clocks: phandle to the clocks feeding the USB subsystem. Two are needed:
+  - "bus": the bus clock for the whole USB subsystem
+  - "hosc": the high frequency oscillator (usually at 24MHz)
+- clock-names: Must contain the clock names described just above
+- #clock-cells : must contain 1
+- #reset-cells : must contain 1
+
+Example:
+usb_clocks: clock@a08000 {
+	compatible = "allwinner,sun9i-a80-usb-clks";
+	reg = <0x00a08000 0x8>;
+	clocks = <&ccu CLK_BUS_USB>, <&osc24M>;
+	clock-names = "bus", "hosc";
+	#clock-cells = <1>;
+	#reset-cells = <1>;
+};