phy: rockchip-inno-usb2: support tuning phy for rk3399

[firefly-linux-kernel-4.4.55.git] / Documentation / devicetree / bindings / phy / phy-rockchip-inno-usb2.txt

diff --git a/Documentation/devicetree/bindings/phy/phy-rockchip-inno-usb2.txt b/Documentation/devicetree/bindings/phy/phy-rockchip-inno-usb2.txt
index 39939d2511d308dda0f942f8bde6099507d7b5f3..f92b2f1cf9d76ab93fae022defeb8d03ad4c07f2 100644 (file)
--- a/Documentation/devicetree/bindings/phy/phy-rockchip-inno-usb2.txt
+++ b/Documentation/devicetree/bindings/phy/phy-rockchip-inno-usb2.txt
@@ -11,6 +11,7 @@ Required properties (phy (parent) node):
 Optional properties:
  - clocks : phandle + phy specifier pair, for the input clock of phy.
  - clock-names : input clock name of phy, must be "phyclk".
+ - rockchip,u2phy-tuning; when set, tuning u2phy to improve usb2 SI.
 
 Required nodes : a sub-node is required for each port the phy provides.
                 The sub-node name is used to identify host or otg port,