diff --git a/arch/arm/boot/dts/exynos5250-snow-common.dtsi b/arch/arm/boot/dts/exynos5250-snow-common.dtsi
index d5d51916bb74..8f3a80430748 100644
--- a/arch/arm/boot/dts/exynos5250-snow-common.dtsi
+++ b/arch/arm/boot/dts/exynos5250-snow-common.dtsi
@@ -523,6 +523,7 @@
 	status = "okay";
 };
 
+/* eMMC flash */
 &mmc_0 {
 	status = "okay";
 	num-slots = <1>;
@@ -536,6 +537,7 @@
 	cap-mmc-highspeed;
 };
 
+/* uSD card */
 &mmc_2 {
 	status = "okay";
 	num-slots = <1>;
@@ -553,6 +555,8 @@
 /*
  * On Snow we've got SIP WiFi and so can keep drive strengths low to
  * reduce EMI.
+ *
+ * WiFi SDIO module
  */
 &mmc_3 {
 	status = "okay";
diff --git a/arch/arm/boot/dts/exynos5420-peach-pit.dts b/arch/arm/boot/dts/exynos5420-peach-pit.dts
index ec4a00f1ce01..1f964ec35c5e 100644
--- a/arch/arm/boot/dts/exynos5420-peach-pit.dts
+++ b/arch/arm/boot/dts/exynos5420-peach-pit.dts
@@ -697,6 +697,7 @@
 	status = "okay";
 };
 
+/* eMMC flash */
 &mmc_0 {
 	status = "okay";
 	num-slots = <1>;
@@ -714,6 +715,7 @@
 	bus-width = <8>;
 };
 
+/* WiFi SDIO module */
 &mmc_1 {
 	status = "okay";
 	num-slots = <1>;
@@ -733,6 +735,7 @@
 	vqmmc-supply = <&buck10_reg>;
 };
 
+/* uSD card */
 &mmc_2 {
 	status = "okay";
 	num-slots = <1>;
diff --git a/arch/arm/boot/dts/exynos5800-peach-pi.dts b/arch/arm/boot/dts/exynos5800-peach-pi.dts
index 01f466816fea..f9ff7f07ae0c 100644
--- a/arch/arm/boot/dts/exynos5800-peach-pi.dts
+++ b/arch/arm/boot/dts/exynos5800-peach-pi.dts
@@ -665,6 +665,7 @@
 	status = "okay";
 };
 
+/* eMMC flash */
 &mmc_0 {
 	status = "okay";
 	num-slots = <1>;
@@ -683,6 +684,7 @@
 	bus-width = <8>;
 };
 
+/* WiFi SDIO module */
 &mmc_1 {
 	status = "okay";
 	num-slots = <1>;
@@ -702,6 +704,7 @@
 	vqmmc-supply = <&buck10_reg>;
 };
 
+/* uSD card */
 &mmc_2 {
 	status = "okay";
 	num-slots = <1>;