dt-bindings: phy-mtk-tphy: add optional properties for u2phy

Add some optional properties for eye diagram test and BC12 of
u2phy

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

diff --git a/Documentation/devicetree/bindings/phy/phy-mtk-tphy.txt b/Documentation/devicetree/bindings/phy/phy-mtk-tphy.txt
index 0d34b2b..a5f7a4f 100644 (file)
--- a/Documentation/devicetree/bindings/phy/phy-mtk-tphy.txt
+++ b/Documentation/devicetree/bindings/phy/phy-mtk-tphy.txt
@@ -47,6 +47,12 @@ Required properties (port (child) node):
                        - PHY_TYPE_PCIE
                        - PHY_TYPE_SATA
 
+Optional properties (PHY_TYPE_USB2 port (child) node):
+- mediatek,eye-src     : u32, the value of slew rate calibrate
+- mediatek,eye-vrt     : u32, the selection of VRT reference voltage
+- mediatek,eye-term    : u32, the selection of HS_TX TERM reference voltage
+- mediatek,bc12        : bool, enable BC12 of u2phy if support it
+
 Example:
 
 u3phy: usb-phy@11290000 {