[PATCH 1/4] dt-bindings: phy: rockchip,inno-usb2phy: add port property

[Nicolas Frattaroli]

USB connectors like to have OF graph connections to high-speed related
nodes to do various things. In the case of the RK3576, we can make use
of a port in the usb2 PHY to detect whether the OTG controller is
connected to a type C port and apply some special behaviour accordingly.

The usefulness of having different bits of a fully functioning USB stack
point to each other is more general though, and not constrained to
RK3576 at all, even for this use-case.

Add a port property to the binding.

Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@xxxxxxxxxxxxx>
---
 Documentation/devicetree/bindings/phy/rockchip,inno-usb2phy.yaml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/phy/rockchip,inno-usb2phy.yaml b/Documentation/devicetree/bindings/phy/rockchip,inno-usb2phy.yaml
index 6a7ef556414cebad63c10de754778f84fd4486ee..3a662bfc353250a8ad9386ebb5575d1e84c1b5ba 100644
--- a/Documentation/devicetree/bindings/phy/rockchip,inno-usb2phy.yaml
+++ b/Documentation/devicetree/bindings/phy/rockchip,inno-usb2phy.yaml
@@ -78,6 +78,11 @@ properties:
       When set the driver will request its phandle as one companion-grf
       for some special SoCs (e.g rv1108).
 
+  port:
+    $ref: /schemas/graph.yaml#/properties/port
+    description:
+      A port node to link the PHY to a USB connector's "high-speed" port.
+
   host-port:
     type: object
     additionalProperties: false

-- 
2.49.0