[PATCH 1/2] dt-bindings: usb: fsa4480: Add an optional audio port/endpoint

[Val Packett <val@packett.cool>]

To actually support analog audio output, the fsa4480 driver needs to
deliver the hotplug notifications over the Type-C graph to an audio
codec driver. Describe a second port intended for the codec. Keep it
optional to make sure existing device trees do still validate.

Signed-off-by: Val Packett <val@packett.cool>
---
 .../devicetree/bindings/usb/fcs,fsa4480.yaml  | 90 +++++++++++++------
 1 file changed, 63 insertions(+), 27 deletions(-)

diff --git a/Documentation/devicetree/bindings/usb/fcs,fsa4480.yaml b/Documentation/devicetree/bindings/usb/fcs,fsa4480.yaml
index 89b1fb90aeeb..9dfe95b6adf3 100644
--- a/Documentation/devicetree/bindings/usb/fcs,fsa4480.yaml
+++ b/Documentation/devicetree/bindings/usb/fcs,fsa4480.yaml
@@ -9,31 +9,11 @@ title: ON Semiconductor Analog Audio Switch
 maintainers:
   - Bjorn Andersson <bjorn.andersson@linaro.org>
 
-properties:
-  compatible:
-    oneOf:
-      - const: fcs,fsa4480
-      - items:
-          - enum:
-              - ocs,ocp96011
-          - const: fcs,fsa4480
-
-  reg:
-    maxItems: 1
-
-  interrupts:
-    maxItems: 1
-
-  vcc-supply:
-    description: power supply (2.7V-5.5V)
-
-  mode-switch: true
-  orientation-switch: true
-
-  port:
+$defs:
+  controller-port:
     $ref: /schemas/graph.yaml#/$defs/port-base
     description:
-      A port node to link the FSA4480 to a TypeC controller for the purpose of
+      A port node to link the FSA4480 to a Type-C controller for the purpose of
       handling altmode muxing and orientation switching.
     unevaluatedProperties: false
 
@@ -69,15 +49,56 @@ properties:
                   - AUX+ connected to SBU2
                   - AUX- connected to SBU1
 
+properties:
+  compatible:
+    oneOf:
+      - const: fcs,fsa4480
+      - items:
+          - enum:
+              - ocs,ocp96011
+          - const: fcs,fsa4480
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  vcc-supply:
+    description: power supply (2.7V-5.5V)
+
+  mode-switch: true
+  orientation-switch: true
+
+  port:
+    $ref: "#/$defs/controller-port"
+
+  ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+    properties:
+      port@0:
+        $ref: "#/$defs/controller-port"
+      port@1:
+        $ref: /schemas/graph.yaml#/$defs/port-base
+        description:
+          A port node to link the FSA4480 to an audio codec in order to
+          notify it whenever an analog audio adapter is plugged/unplugged.
+        unevaluatedProperties: false
+
 required:
   - compatible
   - reg
-  - port
 
 allOf:
   - $ref: usb-switch.yaml#
   - $ref: usb-switch-ports.yaml#
 
+oneOf:
+  - required:
+      - port
+  - required:
+      - ports
+
 additionalProperties: false
 
 examples:
@@ -98,9 +119,24 @@ examples:
             mode-switch;
             orientation-switch;
 
-            port {
-                fsa4480_ept: endpoint {
-                    remote-endpoint = <&typec_controller>;
+            ports {
+                #address-cells = <1>;
+                #size-cells = <0>;
+
+                port@0 {
+                    reg = <0>;
+
+                    fsa4480_sbu_mux: endpoint {
+                        remote-endpoint = <&typec_controller>;
+                    };
+                };
+
+                port@1 {
+                    reg = <1>;
+
+                    fsa4480_audio: endpoint {
+                        remote-endpoint = <&audio_codec>;
+                    };
                 };
             };
         };
-- 
2.55.0