diff --git a/arch/arm64/boot/dts/renesas/r9a09g087.dtsi b/arch/arm64/boot/dts/renesas/r9a09g087.dtsi
index 4da21199d22e..7dcaee711486 100644
--- a/arch/arm64/boot/dts/renesas/r9a09g087.dtsi
+++ b/arch/arm64/boot/dts/renesas/r9a09g087.dtsi
@@ -90,6 +90,76 @@ sci0: serial@80005000 {
 			status = "disabled";
 		};
 
+		sci1: serial@80005400 {
+			compatible = "renesas,r9a09g087-rsci", "renesas,r9a09g077-rsci";
+			reg = <0 0x80005400 0 0x400>;
+			interrupts = <GIC_SPI 594 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 595 IRQ_TYPE_EDGE_RISING>,
+				     <GIC_SPI 596 IRQ_TYPE_EDGE_RISING>,
+				     <GIC_SPI 597 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-names = "eri", "rxi", "txi", "tei";
+			clocks = <&cpg CPG_MOD 9>, <&cpg CPG_CORE R9A09G087_CLK_PCLKM>;
+			clock-names = "operation", "bus";
+			power-domains = <&cpg>;
+			status = "disabled";
+		};
+
+		sci2: serial@80005800 {
+			compatible = "renesas,r9a09g087-rsci", "renesas,r9a09g077-rsci";
+			reg = <0 0x80005800 0 0x400>;
+			interrupts = <GIC_SPI 598 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 599 IRQ_TYPE_EDGE_RISING>,
+				     <GIC_SPI 600 IRQ_TYPE_EDGE_RISING>,
+				     <GIC_SPI 601 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-names = "eri", "rxi", "txi", "tei";
+			clocks = <&cpg CPG_MOD 10>, <&cpg CPG_CORE R9A09G087_CLK_PCLKM>;
+			clock-names = "operation", "bus";
+			power-domains = <&cpg>;
+			status = "disabled";
+		};
+
+		sci3: serial@80005c00 {
+			compatible = "renesas,r9a09g087-rsci", "renesas,r9a09g077-rsci";
+			reg = <0 0x80005c00 0 0x400>;
+			interrupts = <GIC_SPI 602 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 603 IRQ_TYPE_EDGE_RISING>,
+				     <GIC_SPI 604 IRQ_TYPE_EDGE_RISING>,
+				     <GIC_SPI 605 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-names = "eri", "rxi", "txi", "tei";
+			clocks = <&cpg CPG_MOD 11>, <&cpg CPG_CORE R9A09G087_CLK_PCLKM>;
+			clock-names = "operation", "bus";
+			power-domains = <&cpg>;
+			status = "disabled";
+		};
+
+		sci4: serial@80006000 {
+			compatible = "renesas,r9a09g087-rsci", "renesas,r9a09g077-rsci";
+			reg = <0 0x80006000 0 0x400>;
+			interrupts = <GIC_SPI 606 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 607 IRQ_TYPE_EDGE_RISING>,
+				     <GIC_SPI 608 IRQ_TYPE_EDGE_RISING>,
+				     <GIC_SPI 609 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-names = "eri", "rxi", "txi", "tei";
+			clocks = <&cpg CPG_MOD 12>, <&cpg CPG_CORE R9A09G087_CLK_PCLKM>;
+			clock-names = "operation", "bus";
+			power-domains = <&cpg>;
+			status = "disabled";
+		};
+
+		sci5: serial@81005000 {
+			compatible = "renesas,r9a09g087-rsci", "renesas,r9a09g077-rsci";
+			reg = <0 0x81005000 0 0x400>;
+			interrupts = <GIC_SPI 610 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 611 IRQ_TYPE_EDGE_RISING>,
+				     <GIC_SPI 612 IRQ_TYPE_EDGE_RISING>,
+				     <GIC_SPI 613 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-names = "eri", "rxi", "txi", "tei";
+			clocks = <&cpg CPG_MOD 600>, <&cpg CPG_CORE R9A09G087_CLK_PCLKM>;
+			clock-names = "operation", "bus";
+			power-domains = <&cpg>;
+			status = "disabled";
+		};
+
 		i2c0: i2c@80088000 {
 			compatible = "renesas,riic-r9a09g087", "renesas,riic-r9a09g077";
 			reg = <0 0x80088000 0 0x400>;