[PATCH v4 12/18] dt-bindings: usb-switch: Extract endpoints to defs

[Stephen Boyd <swboyd@xxxxxxxxxxxx>]

Move the usb-switch endpoint bindings to defs so that they can be reused
by other bindings. Future users of this binding will have more than one
type-c output node when they're muxing a single DP signal to more than
one usb-c-connector. Add an example to show how this binding can be used
and accelerate binding checks.

Reviewed-by: Rob Herring (Arm) <robh@xxxxxxxxxx>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt@xxxxxxxxxx>
Cc: Conor Dooley <conor+dt@xxxxxxxxxx>
Cc: Benson Leung <bleung@xxxxxxxxxxxx>
Cc: Guenter Roeck <groeck@xxxxxxxxxxxx>
Cc: Prashant Malani <pmalani@xxxxxxxxxxxx>
Cc: Tzung-Bi Shih <tzungbi@xxxxxxxxxx>
Cc: <devicetree@xxxxxxxxxxxxxxx>
Cc: <chrome-platform@xxxxxxxxxxxxxxx>
Cc: Pin-yen Lin <treapking@xxxxxxxxxxxx>
Signed-off-by: Stephen Boyd <swboyd@xxxxxxxxxxxx>
---
 .../devicetree/bindings/usb/usb-switch.yaml   | 74 +++++++++++++++----
 1 file changed, 61 insertions(+), 13 deletions(-)

diff --git a/Documentation/devicetree/bindings/usb/usb-switch.yaml b/Documentation/devicetree/bindings/usb/usb-switch.yaml
index da76118e73a5..f5dc7e23b134 100644
--- a/Documentation/devicetree/bindings/usb/usb-switch.yaml
+++ b/Documentation/devicetree/bindings/usb/usb-switch.yaml
@@ -35,9 +35,12 @@ properties:
     $ref: /schemas/graph.yaml#/properties/ports
     properties:
       port@0:
-        $ref: /schemas/graph.yaml#/properties/port
-        description:
-          Super Speed (SS) Output endpoint to the Type-C connector
+        $ref: /schemas/graph.yaml#/$defs/port-base
+        unevaluatedProperties: false
+
+        properties:
+          endpoint:
+            $ref: '#/$defs/usbc-out-endpoint'
 
       port@1:
         $ref: /schemas/graph.yaml#/$defs/port-base
@@ -47,16 +50,7 @@ properties:
 
         properties:
           endpoint:
-            $ref: /schemas/graph.yaml#/$defs/endpoint-base
-            unevaluatedProperties: false
-            properties:
-              data-lanes:
-                $ref: /schemas/types.yaml#/definitions/uint32-array
-                minItems: 1
-                maxItems: 8
-                uniqueItems: true
-                items:
-                  maximum: 8
+            $ref: '#/$defs/usbc-in-endpoint'
 
 oneOf:
   - required:
@@ -65,3 +59,57 @@ oneOf:
       - ports
 
 additionalProperties: true
+
+$defs:
+  usbc-out-endpoint:
+    $ref: /schemas/graph.yaml#/$defs/endpoint-base
+    description: Super Speed (SS) output endpoint to a type-c connector
+    unevaluatedProperties: false
+
+  usbc-in-endpoint:
+    $ref: /schemas/graph.yaml#/$defs/endpoint-base
+    description: Super Speed (SS) input endpoint from the Super Speed PHY
+    unevaluatedProperties: false
+    properties:
+      data-lanes:
+        $ref: /schemas/types.yaml#/definitions/uint32-array
+        minItems: 1
+        maxItems: 8
+        uniqueItems: true
+        items:
+          maximum: 8
+
+examples:
+  # A USB orientation switch which flips the pin orientation
+  # for a usb-c-connector node.
+  - |
+    device {
+      orientation-switch;
+
+      ports {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        port@0 {
+          reg = <0>;
+          #address-cells = <1>;
+          #size-cells = <0>;
+
+          endpoint {
+            remote-endpoint = <&usb_c_connector>;
+          };
+        };
+
+        port@1 {
+          reg = <1>;
+          #address-cells = <1>;
+          #size-cells = <0>;
+
+          endpoint {
+            remote-endpoint = <&usb_ss_phy>;
+          };
+        };
+      };
+    };
+
+...
-- 
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