diff --git a/arch/arm/dts/r8a7794.dtsi b/arch/arm/dts/r8a7794.dtsi
index 7aa781ff3bf..371dd4715dd 100644
--- a/arch/arm/dts/r8a7794.dtsi
+++ b/arch/arm/dts/r8a7794.dtsi
@@ -955,7 +955,7 @@
 
 		rcar_sound: sound@ec500000 {
 			/*
-			 * #sound-dai-cells is required
+			 * #sound-dai-cells is required if simple-card
 			 *
 			 * Single DAI : #sound-dai-cells = <0>;         <&rcar_sound>;
 			 * Multi  DAI : #sound-dai-cells = <1>;         <&rcar_sound N>;