dt-bindings: net: renesas,rzv2h-gbeth: Document Renesas RZ/G3L SoC

Add device tree binding support for the Gigabit Ethernet (GBETH) IP on
Renesas RZ/G3L SoC. This SoC uses different Synopsys DesignWare MAC
version 5.30 compared to RZ/G3E.

RZ/G3L requires an extra clock compared to RZ/G3E and has pps interrupts.

Add a new compatible string "renesas,r9a08g046-gbeth" for RZ/G3L SoC and
update the schema to handle hardware differences between SoC variants.

Extend the base snps,dwmac.yaml schema to accommodate the PPS interrupts.

Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://patch.msgid.link/20260131161250.5047-2-biju.das.jz@bp.renesas.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Documentation/devicetree/bindings/net/renesas,rzv2h-gbeth.yaml

@@ -26,6 +26,9 @@ select:
 properties:
   compatible:
     oneOf:
+      - items:
+          - const: renesas,r9a08g046-gbeth # RZ/G3L
+          - const: snps,dwmac-5.30a
       - items:
           - enum:
               - renesas,r9a09g047-gbeth # RZ/G3E
@@ -47,13 +50,17 @@ properties:
   clocks:
     oneOf:
       - items:
-          - description: CSR clock
-          - description: AXI system clock
+          - description: CSR/Register access clock
+          - description: AXI system/Main clock
           - description: PTP clock
           - description: TX clock
           - description: RX clock
           - description: TX clock phase-shifted by 180 degrees
           - description: RX clock phase-shifted by 180 degrees
+          - description: RMII clock
+
+        minItems: 7
+
       - items:
           - description: CSR clock
           - description: AXI system clock
@@ -69,6 +76,10 @@ properties:
           - const: rx
           - const: tx-180
           - const: rx-180
+          - const: rmii
+
+        minItems: 7
+
       - items:
           - const: stmmaceth
           - const: pclk
@@ -88,6 +99,22 @@ properties:
           - const: tx-queue-1
           - const: tx-queue-2
           - const: tx-queue-3
+      - items:
+          - const: macirq
+          - const: eth_wake_irq
+          - const: eth_lpi
+          - const: rx-queue-0
+          - const: rx-queue-1
+          - const: rx-queue-2
+          - const: rx-queue-3
+          - const: tx-queue-0
+          - const: tx-queue-1
+          - const: tx-queue-2
+          - const: tx-queue-3
+          - const: ptp-pps-0
+          - const: ptp-pps-1
+          - const: ptp-pps-2
+          - const: ptp-pps-3
       - items:
           - const: macirq
           - const: eth_wake_irq
@@ -135,6 +162,27 @@ required:
 allOf:
   - $ref: snps,dwmac.yaml#
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: renesas,r9a08g046-gbeth
+    then:
+      properties:
+        clocks:
+          minItems: 8
+
+        clock-names:
+          minItems: 8
+
+        interrupts:
+          minItems: 15
+          maxItems: 15
+
+        interrupt-names:
+          minItems: 15
+          maxItems: 15
+
   - if:
       properties:
         compatible:
@@ -163,12 +211,26 @@ allOf:
       required:
         - reset-names
     else:
+      properties:
+        resets:
+          maxItems: 1
+
+        pcs-handle: false
+
+        reset-names: false
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: renesas,rzv2h-gbeth
+    then:
       properties:
         clocks:
-          minItems: 7
+          maxItems: 7
 
         clock-names:
-          minItems: 7
+          maxItems: 7
 
         interrupts:
           minItems: 11
@@ -178,13 +240,6 @@ allOf:
           minItems: 11
           maxItems: 11
 
-        resets:
-          maxItems: 1
-
-        pcs-handle: false
-
-        reset-names: false
-
 unevaluatedProperties: false
 
 examples:

Documentation/devicetree/bindings/net/snps,dwmac.yaml

@@ -75,6 +75,7 @@ properties:
         - qcom,sc8280xp-ethqos
         - qcom,sm8150-ethqos
         - renesas,r9a06g032-gmac
+        - renesas,r9a08g046-gbeth
         - renesas,r9a09g077-gbeth
         - renesas,rzn1-gmac
         - renesas,rzv2h-gbeth
@@ -142,6 +143,8 @@ properties:
           pattern: '^rx-queue-[0-7]$'
         - description: Per channel transmit completion interrupt
           pattern: '^tx-queue-[0-7]$'
+        - description: PPS interrupt
+          pattern: '^ptp-pps-[0-3]$'
 
   clocks:
     minItems: 1