diff --git a/arch/arm64/boot/dts/rockchip/rk3588-vehicle-evb-v22.dts b/arch/arm64/boot/dts/rockchip/rk3588-vehicle-evb-v22.dts
index c2986168a6c3..a214764f4d6c 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-vehicle-evb-v22.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3588-vehicle-evb-v22.dts
@@ -27,6 +27,8 @@
 		vin-supply = <&vcc12v_dcin>;
 		pinctrl-names = "default";
 		pinctrl-0 = <&vcc5v0_buck_en>;
+		startup-delay-us = <2500>;
+		off-on-delay-us = <1500>;
 		regulator-state-mem {
 			regulator-on-in-suspend;
 			regulator-suspend-microvolt = <5000000>;
@@ -156,6 +158,8 @@
 		regulator-max-microvolt = <12000000>;
 		enable-active-high;
 		gpio = <&i2c5_nca9539_gpio 6 GPIO_ACTIVE_HIGH>;
+		startup-delay-us = <2000>;
+		off-on-delay-us = <16000>;
 		vin-supply = <&vcc12v_dcin>;
 		regulator-state-mem {
 			regulator-off-in-suspend;
@@ -172,6 +176,8 @@
 		regulator-max-microvolt = <12000000>;
 		enable-active-high;
 		gpio = <&i2c5_nca9539_gpio 7 GPIO_ACTIVE_HIGH>;
+		startup-delay-us = <2000>;
+		off-on-delay-us = <16000>;
 		vin-supply = <&vcc12v_dcin>;
 		regulator-state-mem {
 			regulator-off-in-suspend;
@@ -188,6 +194,8 @@
 		regulator-max-microvolt = <12000000>;
 		enable-active-high;
 		gpio = <&i2c5_nca9539_gpio 8 GPIO_ACTIVE_HIGH>;
+		startup-delay-us = <2000>;
+		off-on-delay-us = <16000>;
 		vin-supply = <&vcc12v_dcin>;
 		regulator-state-mem {
 			regulator-off-in-suspend;
@@ -204,6 +212,8 @@
 		regulator-max-microvolt = <12000000>;
 		enable-active-high;
 		gpio = <&i2c5_nca9539_gpio 9 GPIO_ACTIVE_HIGH>;
+		startup-delay-us = <2000>;
+		off-on-delay-us = <16000>;
 		vin-supply = <&vcc12v_dcin>;
 		regulator-state-mem {
 			regulator-off-in-suspend;
@@ -220,6 +230,8 @@
 		regulator-max-microvolt = <5000000>;
 		enable-active-high;
 		gpio = <&i2c5_nca9539_gpio 10 GPIO_ACTIVE_HIGH>;
+		startup-delay-us = <2000>;
+		off-on-delay-us = <16000>;
 		vin-supply = <&vcc5v0_usb>;
 	};
 
@@ -232,6 +244,8 @@
 		regulator-max-microvolt = <5000000>;
 		enable-active-high;
 		gpio = <&i2c5_nca9539_gpio 11 GPIO_ACTIVE_HIGH>;
+		startup-delay-us = <2000>;
+		off-on-delay-us = <16000>;
 		vin-supply = <&vcc5v0_usb>;
 	};