diff --git a/Documentation/devicetree/bindings/arm/realtek.yaml b/Documentation/devicetree/bindings/arm/realtek.yaml
index 6ea3a79825cc..ab59de17152d 100644
--- a/Documentation/devicetree/bindings/arm/realtek.yaml
+++ b/Documentation/devicetree/bindings/arm/realtek.yaml
@@ -27,4 +27,10 @@ properties:
               - probox2,ava # ProBox2 AVA
               - zidoo,x9s # Zidoo X9S
           - const: realtek,rtd1295
+
+      # RTD1296 SoC based boards
+      - items:
+          - enum:
+              - synology,ds418 # Synology DiskStation DS418
+          - const: realtek,rtd1296
 ...