dt-bindings: phy-rockchip-inno-usb2: add documentation for extcon property

Commit 98898f3bc83c8 ("phy: rockchip-inno-usb2: support otg-port for
rk3399") introduces the extcon property that is used to detect the
cable-state. Document this property in the documentation binding.

Fixes: 98898f3bc83c8 ("phy: rockchip-inno-usb2: support otg-port for rk3399")
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

diff --git a/Documentation/devicetree/bindings/phy/phy-rockchip-inno-usb2.txt b/Documentation/devicetree/bindings/phy/phy-rockchip-inno-usb2.txt
index 074a7b3..00639ba 100644 (file)
--- a/Documentation/devicetree/bindings/phy/phy-rockchip-inno-usb2.txt
+++ b/Documentation/devicetree/bindings/phy/phy-rockchip-inno-usb2.txt
@@ -23,6 +23,8 @@ Optional properties:
                 register files". When set driver will request its
                 phandle as one companion-grf for some special SoCs
                 (e.g RV1108).
+ - extcon : phandle to the extcon device providing the cable state for
+                the otg phy.
 
 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,