diff --git a/Documentation/devicetree/bindings/input/goodix,gt7375p.yaml b/Documentation/devicetree/bindings/input/goodix,gt7375p.yaml
index 1c191bc5a17823ec88eccddaf59dd31071c796e6..ce18d7dadae23d1dd170254742bc1ea2dd8f1c5b 100644
--- a/Documentation/devicetree/bindings/input/goodix,gt7375p.yaml
+++ b/Documentation/devicetree/bindings/input/goodix,gt7375p.yaml
@@ -36,6 +36,13 @@ properties:
   vdd-supply:
     description: The 3.3V supply to the touchscreen.
 
+  mainboard-vddio-supply:
+    description:
+      The supply on the main board needed to power up IO signals going
+      to the touchscreen. This supply need not go to the touchscreen
+      itself as long as it allows the main board to make signals compatible
+      with what the touchscreen is expecting for its IO rails.
+
 required:
   - compatible
   - reg