diff --git a/Documentation/devicetree/bindings/watchdog/renesas,wdt.yaml b/Documentation/devicetree/bindings/watchdog/renesas,wdt.yaml
index 91a98ccd4226..d060438e1402 100644
--- a/Documentation/devicetree/bindings/watchdog/renesas,wdt.yaml
+++ b/Documentation/devicetree/bindings/watchdog/renesas,wdt.yaml
@@ -55,6 +55,11 @@ properties:
               - renesas,r8a779a0-wdt     # R-Car V3U
           - const: renesas,rcar-gen3-wdt # R-Car Gen3 and RZ/G2
 
+      - items:
+          - enum:
+              - renesas,r8a779f0-wdt     # R-Car S4-8
+          - const: renesas,rcar-gen4-wdt # R-Car Gen4
+
   reg:
     maxItems: 1