dt-bindings: watchdog: renesas,wdt: Add r9a09g011 (RZ/V2M) support

Add the documentation for the r9a09g011 SoC, but in doing so also
reorganise the doc to make it easier to read.
Additionally, make the binding require an interrupt to be specified.
Whilst the driver does not need an interrupt, all of the SoCs that use
this binding actually provide one.

Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20220823093233.8577-2-phil.edworthy@renesas.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

Documentation/devicetree/bindings/watchdog/renesas,wdt.yaml

@@ -31,6 +31,11 @@ properties:
               - renesas,r9a07g054-wdt    # RZ/V2L
           - const: renesas,rzg2l-wdt
 
+      - items:
+          - enum:
+              - renesas,r9a09g011-wdt    # RZ/V2M
+          - const: renesas,rzv2m-wdt     # RZ/V2M
+
       - items:
           - enum:
               - renesas,r8a7742-wdt      # RZ/G1H
@@ -71,13 +76,29 @@ properties:
   reg:
     maxItems: 1
 
-  interrupts: true
+  interrupts:
+    minItems: 1
+    items:
+      - description: Timeout
+      - description: Parity error
 
-  interrupt-names: true
+  interrupt-names:
+    minItems: 1
+    items:
+      - const: wdt
+      - const: perrout
 
-  clocks: true
+  clocks:
+    minItems: 1
+    items:
+      - description: Register access clock
+      - description: Main clock
 
-  clock-names: true
+  clock-names:
+    minItems: 1
+    items:
+      - const: pclk
+      - const: oscclk
 
   power-domains:
     maxItems: 1
@@ -90,6 +111,7 @@ properties:
 required:
   - compatible
   - reg
+  - interrupts
   - clocks
 
 allOf:
@@ -108,6 +130,26 @@ allOf:
         - power-domains
         - resets
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - renesas,rzg2l-wdt
+              - renesas,rzv2m-wdt
+    then:
+      properties:
+        clocks:
+          minItems: 2
+        clock-names:
+          minItems: 2
+      required:
+        - clock-names
+    else:
+      properties:
+        clocks:
+          maxItems: 1
+
   - if:
       properties:
         compatible:
@@ -117,28 +159,15 @@ allOf:
     then:
       properties:
         interrupts:
-          maxItems: 2
+          minItems: 2
         interrupt-names:
-          items:
-            - const: wdt
-            - const: perrout
-        clocks:
-          items:
-            - description: Register access clock
-            - description: Main clock
-        clock-names:
-          items:
-            - const: pclk
-            - const: oscclk
+          minItems: 2
       required:
-        - clock-names
         - interrupt-names
     else:
       properties:
         interrupts:
           maxItems: 1
-        clocks:
-          maxItems: 1
 
 additionalProperties: false
 
@@ -146,9 +175,11 @@ examples:
   - |
     #include <dt-bindings/clock/r8a7795-cpg-mssr.h>
     #include <dt-bindings/power/r8a7795-sysc.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
     wdt0: watchdog@e6020000 {
             compatible = "renesas,r8a7795-wdt", "renesas,rcar-gen3-wdt";
             reg = <0xe6020000 0x0c>;
+            interrupts = <GIC_SPI 140 IRQ_TYPE_LEVEL_HIGH>;
             clocks = <&cpg CPG_MOD 402>;
             power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
             resets = <&cpg 402>;