diff --git a/Documentation/devicetree/bindings/pwm/pwm.yaml b/Documentation/devicetree/bindings/pwm/pwm.yaml
index 3c01f85029e5..abd9fa873354 100644
--- a/Documentation/devicetree/bindings/pwm/pwm.yaml
+++ b/Documentation/devicetree/bindings/pwm/pwm.yaml
@@ -13,7 +13,7 @@ select: false
 
 properties:
   $nodename:
-    pattern: "^pwm(@.*|-[0-9a-f])*$"
+    pattern: "^pwm(@.*|-([0-9]|[1-9][0-9]+))?$"
 
   "#pwm-cells":
     description: