diff --git a/arch/arm/boot/dts/rk322x.dtsi b/arch/arm/boot/dts/rk322x.dtsi
index 3f27991853b9..a3111ef348f0 100644
--- a/arch/arm/boot/dts/rk322x.dtsi
+++ b/arch/arm/boot/dts/rk322x.dtsi
@@ -494,7 +494,7 @@
 	pwm3: pwm@110b0030 {
 		compatible = "rockchip,rk3288-pwm";
 		reg = <0x110b0030 0x10>;
-		#pwm-cells = <2>;
+		#pwm-cells = <3>;
 		clocks = <&cru PCLK_PWM>;
 		clock-names = "pwm";
 		pinctrl-names = "default";