diff --git a/Documentation/devicetree/bindings/mfd/st,stmfx.yaml b/Documentation/devicetree/bindings/mfd/st,stmfx.yaml
index 0ce56a0da553627e10c61d4d874ead29bc046d63..bed22d4abffbab244eb81a17ca91d08062fb6b6f 100644
--- a/Documentation/devicetree/bindings/mfd/st,stmfx.yaml
+++ b/Documentation/devicetree/bindings/mfd/st,stmfx.yaml
@@ -73,8 +73,6 @@ properties:
           output-high: true
           output-low: true
 
-      additionalProperties: false
-
     additionalProperties: false
 
     required: