diff --git a/arch/arm/boot/dts/r8a7779.dtsi b/arch/arm/boot/dts/r8a7779.dtsi
index 3bc133d9489c..3ff259207527 100644
--- a/arch/arm/boot/dts/r8a7779.dtsi
+++ b/arch/arm/boot/dts/r8a7779.dtsi
@@ -287,6 +287,32 @@
 		status = "disabled";
 	};
 
+	hscif0: serial@ffe48000 {
+		compatible = "renesas,hscif-r8a7779",
+			     "renesas,rcar-gen1-hscif", "renesas,hscif";
+		reg = <0xffe48000 96>;
+		interrupts = <GIC_SPI 94 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&mstp0_clks R8A7779_CLK_HSCIF0>,
+			 <&cpg_clocks R8A7779_CLK_S>,
+			 <&scif_clk>;
+		clock-names = "fck", "brg_int", "scif_clk";
+		power-domains = <&cpg_clocks>;
+		status = "disabled";
+	};
+
+	hscif1: serial@ffe49000 {
+		compatible = "renesas,hscif-r8a7779",
+			     "renesas,rcar-gen1-hscif", "renesas,hscif";
+		reg = <0xffe49000 96>;
+		interrupts = <GIC_SPI 95 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&mstp0_clks R8A7779_CLK_HSCIF1>,
+			 <&cpg_clocks R8A7779_CLK_S>,
+			 <&scif_clk>;
+		clock-names = "fck", "brg_int", "scif_clk";
+		power-domains = <&cpg_clocks>;
+		status = "disabled";
+	};
+
 	pfc: pin-controller@fffc0000 {
 		compatible = "renesas,pfc-r8a7779";
 		reg = <0xfffc0000 0x23c>;