diff --git a/arch/arm64/boot/dts/renesas/r8a779f0.dtsi b/arch/arm64/boot/dts/renesas/r8a779f0.dtsi
index c2f152bcf10e..0b59c0d835d9 100644
--- a/arch/arm64/boot/dts/renesas/r8a779f0.dtsi
+++ b/arch/arm64/boot/dts/renesas/r8a779f0.dtsi
@@ -469,6 +469,16 @@ tmu4: timer@ffc00000 {
 			status = "disabled";
 		};
 
+		eth_serdes: serdes@e6444000 {
+			compatible = "renesas,r8a779f0-ether-serdes";
+			reg = <0 0xe6444000 0 0x2800>;
+			clocks = <&cpg CPG_MOD 1506>;
+			power-domains = <&sysc R8A779F0_PD_ALWAYS_ON>;
+			resets = <&cpg 1506>;
+			#phy-cells = <1>;
+			status = "disabled";
+		};
+
 		i2c0: i2c@e6500000 {
 			compatible = "renesas,i2c-r8a779f0",
 				     "renesas,rcar-gen4-i2c";
@@ -651,6 +661,107 @@ ufs: ufs@e6860000 {
 			status = "disabled";
 		};
 
+		rswitch: ethernet@e6880000 {
+			compatible = "renesas,r8a779f0-ether-switch";
+			reg = <0 0xe6880000 0 0x20000>, <0 0xe68c0000 0 0x20000>;
+			reg-names = "base", "secure_base";
+			interrupts = <GIC_SPI 256 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 257 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 258 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 259 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 260 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 261 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 262 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 263 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 265 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 266 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 267 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 268 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 269 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 270 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 271 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 272 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 273 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 274 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 276 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 277 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 278 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 280 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 281 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 282 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 283 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 284 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 285 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 286 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 287 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 288 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 289 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 290 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 291 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 292 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 293 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 294 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 295 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 296 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 297 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 298 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 299 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 300 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 301 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 302 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 304 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 305 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 306 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-names = "mfwd_error", "race_error",
+					  "coma_error", "gwca0_error",
+					  "gwca1_error", "etha0_error",
+					  "etha1_error", "etha2_error",
+					  "gptp0_status", "gptp1_status",
+					  "mfwd_status", "race_status",
+					  "coma_status", "gwca0_status",
+					  "gwca1_status", "etha0_status",
+					  "etha1_status", "etha2_status",
+					  "rmac0_status", "rmac1_status",
+					  "rmac2_status",
+					  "gwca0_rxtx0", "gwca0_rxtx1",
+					  "gwca0_rxtx2", "gwca0_rxtx3",
+					  "gwca0_rxtx4", "gwca0_rxtx5",
+					  "gwca0_rxtx6", "gwca0_rxtx7",
+					  "gwca1_rxtx0", "gwca1_rxtx1",
+					  "gwca1_rxtx2", "gwca1_rxtx3",
+					  "gwca1_rxtx4", "gwca1_rxtx5",
+					  "gwca1_rxtx6", "gwca1_rxtx7",
+					  "gwca0_rxts0", "gwca0_rxts1",
+					  "gwca1_rxts0", "gwca1_rxts1",
+					  "rmac0_mdio", "rmac1_mdio",
+					  "rmac2_mdio",
+					  "rmac0_phy", "rmac1_phy",
+					  "rmac2_phy";
+			clocks = <&cpg CPG_MOD 1506>, <&cpg CPG_MOD 1505>;
+			clock-names = "fck", "tsn";
+			power-domains = <&sysc R8A779F0_PD_ALWAYS_ON>;
+			resets = <&cpg 1506>, <&cpg 1505>;
+			reset-names = "rswitch2", "tsn";
+			status = "disabled";
+
+			ethernet-ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+				port@0 {
+					reg = <0>;
+					phys = <&eth_serdes 0>;
+				};
+				port@1 {
+					reg = <1>;
+					phys = <&eth_serdes 1>;
+				};
+				port@2 {
+					reg = <2>;
+					phys = <&eth_serdes 2>;
+				};
+			};
+		};
+
 		scif0: serial@e6e60000 {
 			compatible = "renesas,scif-r8a779f0",
 				     "renesas,rcar-gen4-scif", "renesas,scif";
