media: dt-bindings: media: renesas,fcp: Document RZ/{G2L,V2L} FCPVD bindings

Document FCPVD found in RZ/G2L alike SoCs. FCPVD block is similar to
FCP for VSP found on R-Car SoC's . It has 3 clocks compared to 1
clock on fcpv. Introduce new compatibles renesas,r9a07g044-fcpvd
for RZ/G2{L,LC} and renesas,r9a07g054-fcpvd for RZ/V2L to handle this
difference.

The 3 clocks are shared between du, vspd and fcpvd. No driver changes
are required as generic compatible string "renesas,fcpv" will be used
as a fallback.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

Documentation/devicetree/bindings/media/renesas,fcp.yaml

@@ -21,15 +21,22 @@ description: |
 
 properties:
   compatible:
-    enum:
-      - renesas,fcpv # FCP for VSP
-      - renesas,fcpf # FCP for FDP
+    oneOf:
+      - enum:
+          - renesas,fcpv # FCP for VSP
+          - renesas,fcpf # FCP for FDP
+      - items:
+          - enum:
+              - renesas,r9a07g044-fcpvd # RZ/G2{L,LC}
+              - renesas,r9a07g054-fcpvd # RZ/V2L
+          - const: renesas,fcpv         # Generic FCP for VSP fallback
 
   reg:
     maxItems: 1
 
-  clocks:
-    maxItems: 1
+  clocks: true
+
+  clock-names: true
 
   iommus:
     maxItems: 1
@@ -49,6 +56,34 @@ required:
 
 additionalProperties: false
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - renesas,r9a07g044-fcpvd
+              - renesas,r9a07g054-fcpvd
+    then:
+      properties:
+        clocks:
+          items:
+            - description: Main clock
+            - description: Register access clock
+            - description: Video clock
+        clock-names:
+          items:
+            - const: aclk
+            - const: pclk
+            - const: vclk
+      required:
+        - clock-names
+    else:
+      properties:
+        clocks:
+          maxItems: 1
+        clock-names: false
+
 examples:
   # R8A7795 (R-Car H3) FCP for VSP-D1
   - |