diff --git a/arch/arm/boot/dts/r8a7778.dtsi b/arch/arm/boot/dts/r8a7778.dtsi
index a31817b2dda79283e415d9c5f9b2391393fa13fc..a39472aab8672330c3ab0816525efd25333d0db6 100644
--- a/arch/arm/boot/dts/r8a7778.dtsi
+++ b/arch/arm/boot/dts/r8a7778.dtsi
@@ -33,6 +33,7 @@
 			compatible = "arm,cortex-a9";
 			reg = <0>;
 			clock-frequency = <800000000>;
+			clocks = <&z_clk>;
 		};
 	};