dt-bindings: usb: mtk-xhci: add a optional property to disable u3ports

Add a new optional property to disable u3ports

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.txt b/Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.txt
index 5611a2e..2d9b459 100644 (file)
--- a/Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.txt
+++ b/Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.txt
@@ -38,6 +38,8 @@ Optional properties:
        mode;
  - mediatek,syscon-wakeup : phandle to syscon used to access USB wakeup
        control register, it depends on "mediatek,wakeup-src".
+ - mediatek,u3p-dis-msk : mask to disable u3ports, bit0 for u3port0,
+       bit1 for u3port1, ... etc;
  - vbus-supply : reference to the VBUS regulator;
  - usb3-lpm-capable : supports USB3.0 LPM
  - pinctrl-names : a pinctrl state named "default" must be defined