doc: binding: Add clock support

Add clock support for xilinx udc driver. While at it fix the case
for xlnx,has-builtin-dma.

Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

diff --git a/Documentation/devicetree/bindings/usb/udc-xilinx.txt b/Documentation/devicetree/bindings/usb/udc-xilinx.txt
index 6253a9040116026a4eff50623dc226c59dd87e86..86f705384132a2d2fc31c3e5dba7e80ccdfd7ddd 100644 (file)
--- a/Documentation/devicetree/bindings/usb/udc-xilinx.txt
+++ b/Documentation/devicetree/bindings/usb/udc-xilinx.txt
@@ -6,7 +6,11 @@ Required properties:
                          device registers map.
 - interrupts           : Should contain single irq line of USB2 device
                          controller
-- xlnx,has-builtin-dma : if DMA is included
+- xlnx,has-builtin-dma : If DMA is included
+
+Optional properties:
+- clock-names          : Should be  "s_axi_aclk"
+- clocks               : Input clock specifier. Refer to common clock bindings.
 
 Example:
                axi-usb2-device@42e00000 {