diff --git a/arch/arm/boot/dts/sun4i-a10-dserve-dsrv9703c.dts b/arch/arm/boot/dts/sun4i-a10-dserve-dsrv9703c.dts
index 8ee3ff42bd55..63e77c05bfda 100644
--- a/arch/arm/boot/dts/sun4i-a10-dserve-dsrv9703c.dts
+++ b/arch/arm/boot/dts/sun4i-a10-dserve-dsrv9703c.dts
@@ -62,6 +62,7 @@
 		brightness-levels = <0 10 20 30 40 50 60 70 80 90 100>;
 		default-brightness-level = <8>;
 		enable-gpios = <&pio 7 7 GPIO_ACTIVE_HIGH>; /* PH7 */
+		power-supply = <&reg_vcc3v3>;
 	};
 
 	chosen {
diff --git a/arch/arm/boot/dts/sun4i-a10-inet1.dts b/arch/arm/boot/dts/sun4i-a10-inet1.dts
index ca878384e902..60e432a0ef1c 100644
--- a/arch/arm/boot/dts/sun4i-a10-inet1.dts
+++ b/arch/arm/boot/dts/sun4i-a10-inet1.dts
@@ -62,6 +62,7 @@
 		brightness-levels = <0 10 20 30 40 50 60 70 80 90 100>;
 		default-brightness-level = <8>;
 		enable-gpios = <&pio 7 7 GPIO_ACTIVE_HIGH>; /* PH7 */
+		power-supply = <&reg_vcc3v3>;
 	};
 
 	chosen {
diff --git a/arch/arm/boot/dts/sun4i-a10-pov-protab2-ips9.dts b/arch/arm/boot/dts/sun4i-a10-pov-protab2-ips9.dts
index 24a3d23e1952..c32596947647 100644
--- a/arch/arm/boot/dts/sun4i-a10-pov-protab2-ips9.dts
+++ b/arch/arm/boot/dts/sun4i-a10-pov-protab2-ips9.dts
@@ -62,6 +62,7 @@
 		brightness-levels = <0 10 20 30 40 50 60 70 80 90 100>;
 		default-brightness-level = <8>;
 		enable-gpios = <&pio 7 7 GPIO_ACTIVE_HIGH>; /* PH7 */
+		power-supply = <&reg_vcc3v3>;
 	};
 
 	chosen {
diff --git a/arch/arm/boot/dts/sun5i-a13-empire-electronix-d709.dts b/arch/arm/boot/dts/sun5i-a13-empire-electronix-d709.dts
index a23bf24792ec..d059388d7252 100644
--- a/arch/arm/boot/dts/sun5i-a13-empire-electronix-d709.dts
+++ b/arch/arm/boot/dts/sun5i-a13-empire-electronix-d709.dts
@@ -61,6 +61,7 @@
 		pwms = <&pwm 0 50000 PWM_POLARITY_INVERTED>;
 		brightness-levels = <0 10 20 30 40 50 60 70 80 90 100>;
 		default-brightness-level = <8>;
+		power-supply = <&reg_vcc3v3>;
 		/* TODO: backlight uses axp gpio1 as enable pin */
 	};
 
diff --git a/arch/arm/boot/dts/sun5i-a13-pocketbook-touch-lux-3.dts b/arch/arm/boot/dts/sun5i-a13-pocketbook-touch-lux-3.dts
index 3428bebceff0..d60407772e5d 100644
--- a/arch/arm/boot/dts/sun5i-a13-pocketbook-touch-lux-3.dts
+++ b/arch/arm/boot/dts/sun5i-a13-pocketbook-touch-lux-3.dts
@@ -28,6 +28,7 @@
 		enable-gpios = <&pio 1 4 GPIO_ACTIVE_HIGH>; /* PB4 */
 		brightness-levels = <0 10 20 30 40 50 60 70 80 90 100>;
 		default-brightness-level = <8>;
+		power-supply = <&reg_vcc3v3>;
 	};
 
 	chosen {
diff --git a/arch/arm/boot/dts/sun5i-gr8-evb.dts b/arch/arm/boot/dts/sun5i-gr8-evb.dts
index 4c20d731a9c6..f4fe258ef06d 100644
--- a/arch/arm/boot/dts/sun5i-gr8-evb.dts
+++ b/arch/arm/boot/dts/sun5i-gr8-evb.dts
@@ -71,7 +71,7 @@
 		compatible = "pwm-backlight";
 		pwms = <&pwm 0 10000 0>;
 		enable-gpios = <&axp_gpio 1 GPIO_ACTIVE_HIGH>;
-
+		power-supply = <&reg_vcc3v3>;
 		brightness-levels = <0 10 20 30 40 50 60 70 80 90 100>;
 		default-brightness-level = <8>;
 	};
diff --git a/arch/arm/boot/dts/sun5i-reference-design-tablet.dtsi b/arch/arm/boot/dts/sun5i-reference-design-tablet.dtsi
index 1a9926d71410..6847f66699ac 100644
--- a/arch/arm/boot/dts/sun5i-reference-design-tablet.dtsi
+++ b/arch/arm/boot/dts/sun5i-reference-design-tablet.dtsi
@@ -55,6 +55,7 @@
 		brightness-levels = <0 10 20 30 40 50 60 70 80 90 100>;
 		default-brightness-level = <8>;
 		enable-gpios = <&axp_gpio 1 GPIO_ACTIVE_HIGH>; /* AXP GPIO1 */
+		power-supply = <&reg_vcc3v0>;
 	};
 
 	chosen {
diff --git a/arch/arm/boot/dts/sun7i-a20-wexler-tab7200.dts b/arch/arm/boot/dts/sun7i-a20-wexler-tab7200.dts
index 6a66b0432dfa..fef02fcbbdf8 100644
--- a/arch/arm/boot/dts/sun7i-a20-wexler-tab7200.dts
+++ b/arch/arm/boot/dts/sun7i-a20-wexler-tab7200.dts
@@ -64,6 +64,7 @@
 		brightness-levels = <0 10 20 30 40 50 60 70 80 90 100>;
 		default-brightness-level = <8>;
 		enable-gpios = <&pio 7 7 GPIO_ACTIVE_HIGH>; /* PH7 */
+		power-supply = <&reg_vcc3v3>;
 	};
 
 	chosen {
diff --git a/arch/arm/boot/dts/sun8i-a83t-tbs-a711.dts b/arch/arm/boot/dts/sun8i-a83t-tbs-a711.dts
index bfc9bb277a49..83b01b03e08e 100644
--- a/arch/arm/boot/dts/sun8i-a83t-tbs-a711.dts
+++ b/arch/arm/boot/dts/sun8i-a83t-tbs-a711.dts
@@ -65,7 +65,7 @@
 		compatible = "pwm-backlight";
 		pwms = <&pwm 0 50000 PWM_POLARITY_INVERTED>;
 		enable-gpios = <&pio 3 29 GPIO_ACTIVE_HIGH>;
-
+		power-supply = <&reg_sw>;
 		brightness-levels = <0 1 2 4 8 16 32 64 128 255>;
 		default-brightness-level = <9>;
 	};
diff --git a/arch/arm/boot/dts/sun8i-reference-design-tablet.dtsi b/arch/arm/boot/dts/sun8i-reference-design-tablet.dtsi
index b3d8b8f056cd..daf4be6416df 100644
--- a/arch/arm/boot/dts/sun8i-reference-design-tablet.dtsi
+++ b/arch/arm/boot/dts/sun8i-reference-design-tablet.dtsi
@@ -54,6 +54,7 @@
 		brightness-levels = <0 10 20 30 40 50 60 70 80 90 100>;
 		default-brightness-level = <8>;
 		enable-gpios = <&pio 7 6 GPIO_ACTIVE_HIGH>; /* PH6 */
+		power-supply = <&reg_dc1sw>;
 	};
 
 	chosen {
diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi
index bcf64998a829..bbc26abb1e10 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi
+++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi
@@ -21,6 +21,7 @@
 		compatible = "pwm-backlight";
 		pwms = <&r_pwm 0 50000 PWM_POLARITY_INVERTED>;
 		enable-gpios = <&pio 7 10 GPIO_ACTIVE_HIGH>; /* PH10 */
+		power-supply = <&reg_ps>;
 		/* Backlight configuration differs per PinePhone revision. */
 	};
 
@@ -50,6 +51,14 @@
 		};
 	};
 
+	reg_ps: ps-regulator {
+		compatible = "regulator-fixed";
+		regulator-name = "ps";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		regulator-boot-on;
+	};
+
 	reg_vbat_wifi: vbat-wifi {
 		compatible = "regulator-fixed";
 		regulator-min-microvolt = <3300000>;