Document the optional ports subnode to describe the High-Speed
and Super-Speed connections as separate OF graph links.

The ports property is an alternative to the already documented
single port subnode property.

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
---
 Documentation/devicetree/bindings/usb/snps,dwc3.yaml | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
index 16c7d06c9172..cce74c59bf0e 100644
--- a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
+++ b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
@@ -379,6 +379,22 @@ properties:
       This port is used with the 'usb-role-switch' property  to connect the
       dwc3 to type C connector.
 
+  ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+    description:
+      Those ports should be used with any connector to the data bus of this
+      controller using the OF graph bindings specified if the "usb-role-switch"
+      property is used.
+
+    properties:
+      port@0:
+        $ref: /schemas/graph.yaml#/properties/port
+        description: High Speed (HS) data bus.
+
+      port@1:
+        $ref: /schemas/graph.yaml#/properties/port
+        description: Super Speed (SS) data bus.
+
   wakeup-source:
     $ref: /schemas/types.yaml#/definitions/flag
     description:

-- 
2.34.1