diff --git a/arch/arm/boot/dts/r8a7742.dtsi b/arch/arm/boot/dts/r8a7742.dtsi
index 758a1bf02fae..d1c256d8bd56 100644
--- a/arch/arm/boot/dts/r8a7742.dtsi
+++ b/arch/arm/boot/dts/r8a7742.dtsi
@@ -1155,7 +1155,7 @@ vin3: video@e6ef3000 {
 
 		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>;
diff --git a/arch/arm/boot/dts/r8a7743.dtsi b/arch/arm/boot/dts/r8a7743.dtsi
index 20f1d98a048d..2245d19a23bb 100644
--- a/arch/arm/boot/dts/r8a7743.dtsi
+++ b/arch/arm/boot/dts/r8a7743.dtsi
@@ -1190,7 +1190,7 @@ vin2: video@e6ef2000 {
 
 		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>;
diff --git a/arch/arm/boot/dts/r8a7744.dtsi b/arch/arm/boot/dts/r8a7744.dtsi
index 96b2d5a4e8f6..aa13841f9781 100644
--- a/arch/arm/boot/dts/r8a7744.dtsi
+++ b/arch/arm/boot/dts/r8a7744.dtsi
@@ -1190,7 +1190,7 @@ vin2: video@e6ef2000 {
 
 		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>;
diff --git a/arch/arm/boot/dts/r8a7745.dtsi b/arch/arm/boot/dts/r8a7745.dtsi
index afc902e532d8..44688b8431c3 100644
--- a/arch/arm/boot/dts/r8a7745.dtsi
+++ b/arch/arm/boot/dts/r8a7745.dtsi
@@ -1120,7 +1120,7 @@ vin1: video@e6ef1000 {
 
 		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>;
diff --git a/arch/arm/boot/dts/r8a7778.dtsi b/arch/arm/boot/dts/r8a7778.dtsi
index 95efbafb0b70..8d4530ed2fc6 100644
--- a/arch/arm/boot/dts/r8a7778.dtsi
+++ b/arch/arm/boot/dts/r8a7778.dtsi
@@ -241,7 +241,7 @@ tmu2: timer@ffd82000 {
 
 	rcar_sound: sound@ffd90000 {
 		/*
-		 * #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>;
diff --git a/arch/arm/boot/dts/r8a7790.dtsi b/arch/arm/boot/dts/r8a7790.dtsi
index db171e3c62f2..b5e362fab418 100644
--- a/arch/arm/boot/dts/r8a7790.dtsi
+++ b/arch/arm/boot/dts/r8a7790.dtsi
@@ -1109,7 +1109,7 @@ vin3: video@e6ef3000 {
 
 		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>;
diff --git a/arch/arm/boot/dts/r8a7791.dtsi b/arch/arm/boot/dts/r8a7791.dtsi
index d8f91d9f42ae..853eef9e031d 100644
--- a/arch/arm/boot/dts/r8a7791.dtsi
+++ b/arch/arm/boot/dts/r8a7791.dtsi
@@ -1223,7 +1223,7 @@ vin2: video@e6ef2000 {
 
 		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>;
diff --git a/arch/arm/boot/dts/r8a7793.dtsi b/arch/arm/boot/dts/r8a7793.dtsi
index 9ebe7bfaf0ed..8bc3e19f8adf 100644
--- a/arch/arm/boot/dts/r8a7793.dtsi
+++ b/arch/arm/boot/dts/r8a7793.dtsi
@@ -988,7 +988,7 @@ vin2: video@e6ef2000 {
 
 		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>;
diff --git a/arch/arm/boot/dts/r8a7794.dtsi b/arch/arm/boot/dts/r8a7794.dtsi
index 7aa781ff3bff..371dd4715dde 100644
--- a/arch/arm/boot/dts/r8a7794.dtsi
+++ b/arch/arm/boot/dts/r8a7794.dtsi
@@ -955,7 +955,7 @@ vin1: video@e6ef1000 {
 
 		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>;
