diff --git a/Documentation/devicetree/bindings/watchdog/realtek,otto-wdt.yaml b/Documentation/devicetree/bindings/watchdog/realtek,otto-wdt.yaml
index 11b220a5e0f63..099245fe7b10c 100644
--- a/Documentation/devicetree/bindings/watchdog/realtek,otto-wdt.yaml
+++ b/Documentation/devicetree/bindings/watchdog/realtek,otto-wdt.yaml
@@ -29,6 +29,7 @@ properties:
       - realtek,rtl8380-wdt
       - realtek,rtl8390-wdt
       - realtek,rtl9300-wdt
+      - realtek,rtl9310-wdt
 
   reg:
     maxItems: 1