dt-bindings: net: Add support for AM65x SR1.0 in ICSSG

Silicon Revision 1.0 of the AM65x came with a slightly different ICSSG
support: Only 2 PRUs per slice are available and instead 2 additional
DMA channels are used for management purposes. We have no restrictions
on specified PRUs, but the DMA channels need to be adjusted.

Co-developed-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Diogo Ivo <diogo.ivo@siemens.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
Reviewed-by: MD Danish Anwar <danishanwar@ti.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Documentation/devicetree/bindings/net/ti,icssg-prueth.yaml

@@ -13,14 +13,12 @@ description:
   Ethernet based on the Programmable Real-Time Unit and Industrial
   Communication Subsystem.
 
-allOf:
-  - $ref: /schemas/remoteproc/ti,pru-consumer.yaml#
-
 properties:
   compatible:
     enum:
-      - ti,am642-icssg-prueth  # for AM64x SoC family
-      - ti,am654-icssg-prueth  # for AM65x SoC family
+      - ti,am642-icssg-prueth      # for AM64x SoC family
+      - ti,am654-icssg-prueth      # for AM65x SoC family
+      - ti,am654-sr1-icssg-prueth  # for AM65x SoC family, SR1.0
 
   sram:
     $ref: /schemas/types.yaml#/definitions/phandle
@@ -28,9 +26,11 @@ properties:
       phandle to MSMC SRAM node
 
   dmas:
-    maxItems: 10
+    minItems: 10
+    maxItems: 12
 
   dma-names:
+    minItems: 10
     items:
       - const: tx0-0
       - const: tx0-1
@@ -42,6 +42,8 @@ properties:
       - const: tx1-3
       - const: rx0
       - const: rx1
+      - const: rxmgm0
+      - const: rxmgm1
 
   ti,mii-g-rt:
     $ref: /schemas/types.yaml#/definitions/phandle
@@ -132,6 +134,27 @@ required:
   - interrupts
   - interrupt-names
 
+allOf:
+  - $ref: /schemas/remoteproc/ti,pru-consumer.yaml#
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: ti,am654-sr1-icssg-prueth
+    then:
+      properties:
+        dmas:
+          minItems: 12
+        dma-names:
+          minItems: 12
+    else:
+      properties:
+        dmas:
+          maxItems: 10
+        dma-names:
+          maxItems: 10
+
 unevaluatedProperties: false
 
 examples: