diff --git a/Documentation/devicetree/bindings/mfd/axp20x.txt b/Documentation/devicetree/bindings/mfd/axp20x.txt
index 188f0373d441..c6266052d23f 100644
--- a/Documentation/devicetree/bindings/mfd/axp20x.txt
+++ b/Documentation/devicetree/bindings/mfd/axp20x.txt
@@ -32,6 +32,12 @@ Required properties:
 - interrupt-controller: The PMIC has its own internal IRQs
 - #interrupt-cells: Should be set to 1
 
+Supported common regulator properties, see ../regulator/regulator.txt for
+more information:
+- regulator-ramp-delay: sets the ramp up delay in uV/us
+			AXP20x/DCDC2: 1600, 800
+			AXP20x/LDO3:  1600, 800
+
 Optional properties:
 - x-powers,dcdc-freq: defines the work frequency of DC-DC in KHz
 		      AXP152/20X: range:  750-1875, Default: 1.5 MHz