dt-bindings: net: Add switch ports and interrupts to RTL9300

Add bindings for the ethernet-switch and interrupt properties for the
RTL9300.

Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20250218195216.1034220-3-chris.packham@alliedtelesis.co.nz
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Documentation/devicetree/bindings/net/realtek,rtl9301-switch.yaml

@@ -14,6 +14,8 @@ description:
   number of different peripherals are accessed through a common register block,
   represented here as a syscon node.
 
+$ref: ethernet-switch.yaml#/$defs/ethernet-ports
+
 properties:
   compatible:
     items:
@@ -28,12 +30,23 @@ properties:
   reg:
     maxItems: 1
 
+  interrupts:
+    maxItems: 2
+
+  interrupt-names:
+    items:
+      - const: switch
+      - const: nic
+
   '#address-cells':
     const: 1
 
   '#size-cells':
     const: 1
 
+  ethernet-ports:
+    type: object
+
 patternProperties:
   'reboot@[0-9a-f]+$':
     $ref: /schemas/power/reset/syscon-reboot.yaml#
@@ -44,6 +57,8 @@ patternProperties:
 required:
   - compatible
   - reg
+  - interrupts
+  - interrupt-names
 
 additionalProperties: false
 
@@ -52,6 +67,9 @@ examples:
     ethernet-switch@1b000000 {
       compatible = "realtek,rtl9301-switch", "syscon", "simple-mfd";
       reg = <0x1b000000 0x10000>;
+      interrupt-parent = <&intc>;
+      interrupts = <23>, <24>;
+      interrupt-names = "switch", "nic";
       #address-cells = <1>;
       #size-cells = <1>;
 
@@ -110,5 +128,17 @@ examples:
           };
         };
       };
+
+      ethernet-ports {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        port@0 {
+          reg = <0>;
+        };
+        port@1 {
+          reg = <1>;
+        };
+      };
     };