diff --git a/Documentation/devicetree/bindings/gpio/fsl-imx-gpio.txt b/Documentation/devicetree/bindings/gpio/fsl-imx-gpio.txt
index dbd22e0df21e44b953c8ffc4a6d904bd2f84e8ae..b4cd9f906c24d7d3485d524a12521f457aad921a 100644
--- a/Documentation/devicetree/bindings/gpio/fsl-imx-gpio.txt
+++ b/Documentation/devicetree/bindings/gpio/fsl-imx-gpio.txt
@@ -19,6 +19,9 @@ Required properties:
       4 = active high level-sensitive.
       8 = active low level-sensitive.
 
+Optional properties:
+- clocks: the clock for clocking the GPIO silicon
+
 Example:
 
 gpio0: gpio@73f84000 {