diff --git a/arch/arm/boot/dts/rk3288-firefly.dtsi b/arch/arm/boot/dts/rk3288-firefly.dtsi
index 0b42372e437944f2ed4ffeff249dbaabec1543a8..0c66e92a88857e4e713805a21f90debc5b9abbb5 100644
--- a/arch/arm/boot/dts/rk3288-firefly.dtsi
+++ b/arch/arm/boot/dts/rk3288-firefly.dtsi
@@ -213,6 +213,8 @@
 		regulator-max-microvolt = <1350000>;
 		regulator-always-on;
 		regulator-boot-on;
+		regulator-enable-ramp-delay = <300>;
+		regulator-ramp-delay = <8000>;
 		vin-supply = <&vcc_sys>;
 	};