diff --git a/Documentation/devicetree/bindings/devfreq/event/samsung,exynos-ppmu.yaml b/Documentation/devicetree/bindings/devfreq/event/samsung,exynos-ppmu.yaml
index d27dcb2fef12..a3f0cd508b3a 100644
--- a/Documentation/devicetree/bindings/devfreq/event/samsung,exynos-ppmu.yaml
+++ b/Documentation/devicetree/bindings/devfreq/event/samsung,exynos-ppmu.yaml
@@ -40,7 +40,7 @@ properties:
     type: object
 
     patternProperties:
-      '^ppmu-event[0-9]+(-[a-z0-9]+){,2}$':
+      '^ppmu-event[0-9]+(-[a-z0-9]+){0,2}$':
         type: object
         properties:
           event-name: