diff --git a/arch/arm64/boot/dts/renesas/salvator-common.dtsi b/arch/arm64/boot/dts/renesas/salvator-common.dtsi
index f66d990b92f1d51f22196262e97147f195d14a96..a225c2457274763fd558ad3aa72153c228afa51a 100644
--- a/arch/arm64/boot/dts/renesas/salvator-common.dtsi
+++ b/arch/arm64/boot/dts/renesas/salvator-common.dtsi
@@ -764,6 +764,7 @@
 	vqmmc-supply = <&reg_1p8v>;
 	bus-width = <8>;
 	mmc-hs200-1_8v;
+	mmc-hs400-1_8v;
 	non-removable;
 	fixed-emmc-driver-type = <1>;
 	status = "okay";
diff --git a/arch/arm64/boot/dts/renesas/ulcb.dtsi b/arch/arm64/boot/dts/renesas/ulcb.dtsi
index a3878fb3c3f1ab70351a6fc021d591f66367baf2..e70e1bac2be408d2df1434adf609e65a29807816 100644
--- a/arch/arm64/boot/dts/renesas/ulcb.dtsi
+++ b/arch/arm64/boot/dts/renesas/ulcb.dtsi
@@ -463,6 +463,7 @@
 	vqmmc-supply = <&reg_1p8v>;
 	bus-width = <8>;
 	mmc-hs200-1_8v;
+	mmc-hs400-1_8v;
 	non-removable;
 	status = "okay";
 };