diff --git a/Documentation/devicetree/bindings/iio/adc/ti,tsc2046.yaml b/Documentation/devicetree/bindings/iio/adc/ti,tsc2046.yaml
index 0b48814c0dc2..bdf3bba2d750 100644
--- a/Documentation/devicetree/bindings/iio/adc/ti,tsc2046.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/ti,tsc2046.yaml
@@ -23,6 +23,9 @@ properties:
   interrupts:
     maxItems: 1
 
+  vref-supply:
+    description: Optional supply of the reference voltage
+
   "#io-channel-cells":
     const: 1