diff --git a/Documentation/devicetree/bindings/arm/rockchip.yaml b/Documentation/devicetree/bindings/arm/rockchip.yaml
index c9b078be3a90..670d743aa9da 100644
--- a/Documentation/devicetree/bindings/arm/rockchip.yaml
+++ b/Documentation/devicetree/bindings/arm/rockchip.yaml
@@ -894,11 +894,15 @@ properties:
           - const: rockchip,rk3568
 
       - description: QNAP TS-x33 NAS devices
-        items:
-          - enum:
-              - qnap,ts233
-              - qnap,ts433
-          - const: rockchip,rk3568
+        oneOf:
+          - items:
+              - const: qnap,ts133
+              - const: rockchip,rk3566
+          - items:
+              - enum:
+                  - qnap,ts233
+                  - qnap,ts433
+              - const: rockchip,rk3568
 
       - description: Radxa Compute Module 3 (CM3)
         items: