diff --git a/Documentation/devicetree/bindings/mfd/ti,twl.yaml b/Documentation/devicetree/bindings/mfd/ti,twl.yaml
index 2cbdd238f48f..e94b0fd7af0f 100644
--- a/Documentation/devicetree/bindings/mfd/ti,twl.yaml
+++ b/Documentation/devicetree/bindings/mfd/ti,twl.yaml
@@ -225,6 +225,7 @@ examples:
         gpadc {
           compatible = "ti,twl6030-gpadc";
           interrupts = <6>;
+          #io-channel-cells = <1>;
         };
 
         rtc {