[PATCH 6/8] phy-rcar-usb-gen2: add device tree documentation

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Documentation for phy-rcar-usb-gen2 device tree binding.

Signed-off-by: Ben Dooks <ben.dooks@xxxxxxxxxxxxxxx>
--
Cc: linux-sh@xxxxxxxxxxxxxxx
Cc: devicetree@xxxxxxxxxxxxxxx
Cc: horms+renesas@xxxxxxxxxxxx
---
 .../bindings/usb/renesas,rcar-gen2-usb-phy.txt           | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/usb/renesas,rcar-gen2-usb-phy.txt

diff --git a/Documentation/devicetree/bindings/usb/renesas,rcar-gen2-usb-phy.txt b/Documentation/devicetree/bindings/usb/renesas,rcar-gen2-usb-phy.txt
new file mode 100644
index 0000000..e1d2dd9
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/renesas,rcar-gen2-usb-phy.txt
@@ -0,0 +1,16 @@
+Renesas RCar gen2 USB PHY bindings
+
+Required properties:
+ - compatible: "renesas,usb-phy-r8a7790" for the R8A7790 SoC or
+    "renesas,rcar-gen2-usb-phy" for any generic comaptible device.
+ - reg : A single region to access device registers
+ - clocks : The reference to the clock to use for this block
+ - clock-names : The name for the clock at index 0 (must be "usbhs")
+
+Note, interrupt is currently not supported by the driver, but there should
+be a node in the device tree for it.
+
+Optional properties:
+
+ - renesas,usb0-hs: boolean, if present USB0 is connected to HS device.
+ - renesas,usb2-ss: boolean, if present USB2 is connected to XHCI controller.
-- 
1.8.5.2

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