dt-bindings: rtc: pcf85063: add binding for RV8063

Microcrystal RV8063 is a real-time clock module with SPI interface.

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Antoni Pokusinski <apokusinski01@gmail.com>
Link: https://lore.kernel.org/r/20250413130755.159373-2-apokusinski01@gmail.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Documentation/devicetree/bindings/rtc/nxp,pcf85063.yaml

@@ -12,6 +12,7 @@ maintainers:
 properties:
   compatible:
     enum:
+      - microcrystal,rv8063
       - microcrystal,rv8263
       - nxp,pcf85063
       - nxp,pcf85063a
@@ -44,13 +45,19 @@ properties:
 
   wakeup-source: true
 
+  spi-cs-high: true
+
+  spi-3wire: true
+
 allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
   - $ref: rtc.yaml#
   - if:
       properties:
         compatible:
           contains:
             enum:
+              - microcrystal,rv8063
               - microcrystal,rv8263
     then:
       properties:
@@ -65,12 +72,23 @@ allOf:
       properties:
         quartz-load-femtofarads:
           const: 7000
+  - if:
+      properties:
+        compatible:
+          not:
+            contains:
+              enum:
+                - microcrystal,rv8063
+    then:
+      properties:
+        spi-cs-high: false
+        spi-3wire: false
 
 required:
   - compatible
   - reg
 
-additionalProperties: false
+unevaluatedProperties: false
 
 examples:
   - |
@@ -90,3 +108,16 @@ examples:
           };
         };
       };
+
+  - |
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        rtc@0 {
+            compatible = "microcrystal,rv8063";
+            reg = <0>;
+            spi-cs-high;
+            spi-3wire;
+        };
+    };