dt-bindings: reset: syscon-reboot: add google,gs101-reboot

GS101 supports a couple different reset types via certain registers in
the SYSCON register map.

Add a compatible for it. When in effect, all register values and offsets
are implied, hence they shall not be specified in that case.

Signed-off-by: André Draszik <andre.draszik@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20250401-syscon-reboot-reset-mode-v5-1-5b9357442363@linaro.org
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

Documentation/devicetree/bindings/power/reset/syscon-reboot.yaml

@@ -21,7 +21,9 @@ description: |+
 
 properties:
   compatible:
-    const: syscon-reboot
+    enum:
+      - syscon-reboot
+      - google,gs101-reboot
 
   mask:
     $ref: /schemas/types.yaml#/definitions/uint32
@@ -49,12 +51,6 @@ properties:
   priority:
     default: 192
 
-oneOf:
-  - required:
-      - offset
-  - required:
-      - reg
-
 required:
   - compatible
 
@@ -63,12 +59,29 @@ additionalProperties: false
 allOf:
   - $ref: restart-handler.yaml#
   - if:
-      not:
-        required:
-          - mask
+      properties:
+        compatible:
+          contains:
+            const: google,gs101-reboot
     then:
-      required:
-        - value
+      properties:
+        mask: false
+        offset: false
+        reg: false
+        value: false
+
+    else:
+      if:
+        not:
+          required:
+            - mask
+      then:
+        required:
+          - value
+
+      oneOf:
+        - required: [offset]
+        - required: [reg]
 
 examples:
   - |
@@ -78,3 +91,8 @@ examples:
         offset = <0x0>;
         mask = <0x1>;
     };
+
+  - |
+    reboot {
+        compatible = "google,gs101-reboot";
+    };