diff --git a/arch/arm/boot/dts/r8a7778.dtsi b/arch/arm/boot/dts/r8a7778.dtsi
index 2be4c54ba067..593c6df90303 100644
--- a/arch/arm/boot/dts/r8a7778.dtsi
+++ b/arch/arm/boot/dts/r8a7778.dtsi
@@ -498,14 +498,17 @@
 		audio_clk_a: audio_clk_a {
 			compatible = "fixed-clock";
 			#clock-cells = <0>;
+			clock-frequency = <0>;
 		};
 		audio_clk_b: audio_clk_b {
 			compatible = "fixed-clock";
 			#clock-cells = <0>;
+			clock-frequency = <0>;
 		};
 		audio_clk_c: audio_clk_c {
 			compatible = "fixed-clock";
 			#clock-cells = <0>;
+			clock-frequency = <0>;
 		};
 
 		/* Fixed ratio clocks */