diff --git a/Documentation/devicetree/bindings/timestamp/hardware-timestamps-common.yaml b/Documentation/devicetree/bindings/timestamp/hardware-timestamps-common.yaml
index fd6a7b51f571..95f42acd0c54 100644
--- a/Documentation/devicetree/bindings/timestamp/hardware-timestamps-common.yaml
+++ b/Documentation/devicetree/bindings/timestamp/hardware-timestamps-common.yaml
@@ -17,7 +17,7 @@ description:
 
 properties:
   $nodename:
-    pattern: "^timestamp(@.*|-[0-9a-f])?$"
+    pattern: "^timestamp(@.*|-([0-9]|[1-9][0-9]+))?$"
 
   "#timestamp-cells":
     description: