diff --git a/arch/arm64/boot/dts/renesas/r8a7795.dtsi b/arch/arm64/boot/dts/renesas/r8a7795.dtsi
index 4049182e66087b72..780b5bd37281a801 100644
--- a/arch/arm64/boot/dts/renesas/r8a7795.dtsi
+++ b/arch/arm64/boot/dts/renesas/r8a7795.dtsi
@@ -10,6 +10,7 @@
 
 #include <dt-bindings/clock/r8a7795-cpg-mssr.h>
 #include <dt-bindings/interrupt-controller/arm-gic.h>
+#include <dt-bindings/power/r8a7795-sysc.h>
 
 / {
 	compatible = "renesas,r8a7795";
@@ -39,6 +40,7 @@
 			compatible = "arm,cortex-a57", "arm,armv8";
 			reg = <0x0>;
 			device_type = "cpu";
+			power-domains = <&sysc R8A7795_PD_CA57_CPU0>;
 			next-level-cache = <&L2_CA57>;
 			enable-method = "psci";
 		};
@@ -47,6 +49,7 @@
 			compatible = "arm,cortex-a57","arm,armv8";
 			reg = <0x1>;
 			device_type = "cpu";
+			power-domains = <&sysc R8A7795_PD_CA57_CPU1>;
 			next-level-cache = <&L2_CA57>;
 			enable-method = "psci";
 		};
@@ -54,6 +57,7 @@
 			compatible = "arm,cortex-a57","arm,armv8";
 			reg = <0x2>;
 			device_type = "cpu";
+			power-domains = <&sysc R8A7795_PD_CA57_CPU2>;
 			next-level-cache = <&L2_CA57>;
 			enable-method = "psci";
 		};
@@ -61,6 +65,7 @@
 			compatible = "arm,cortex-a57","arm,armv8";
 			reg = <0x3>;
 			device_type = "cpu";
+			power-domains = <&sysc R8A7795_PD_CA57_CPU3>;
 			next-level-cache = <&L2_CA57>;
 			enable-method = "psci";
 		};
@@ -68,12 +73,14 @@
 
 	L2_CA57: cache-controller@0 {
 		compatible = "cache";
+		power-domains = <&sysc R8A7795_PD_CA57_SCU>;
 		cache-unified;
 		cache-level = <2>;
 	};
 
 	L2_CA53: cache-controller@1 {
 		compatible = "cache";
+		power-domains = <&sysc R8A7795_PD_CA53_SCU>;
 		cache-unified;
 		cache-level = <2>;
 	};
@@ -163,7 +170,7 @@
 			#interrupt-cells = <2>;
 			interrupt-controller;
 			clocks = <&cpg CPG_MOD 912>;
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 		};
 
 		gpio1: gpio@e6051000 {
@@ -177,7 +184,7 @@
 			#interrupt-cells = <2>;
 			interrupt-controller;
 			clocks = <&cpg CPG_MOD 911>;
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 		};
 
 		gpio2: gpio@e6052000 {
@@ -191,7 +198,7 @@
 			#interrupt-cells = <2>;
 			interrupt-controller;
 			clocks = <&cpg CPG_MOD 910>;
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 		};
 
 		gpio3: gpio@e6053000 {
@@ -205,7 +212,7 @@
 			#interrupt-cells = <2>;
 			interrupt-controller;
 			clocks = <&cpg CPG_MOD 909>;
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 		};
 
 		gpio4: gpio@e6054000 {
@@ -219,7 +226,7 @@
 			#interrupt-cells = <2>;
 			interrupt-controller;
 			clocks = <&cpg CPG_MOD 908>;
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 		};
 
 		gpio5: gpio@e6055000 {
@@ -233,7 +240,7 @@
 			#interrupt-cells = <2>;
 			interrupt-controller;
 			clocks = <&cpg CPG_MOD 907>;
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 		};
 
 		gpio6: gpio@e6055400 {
@@ -247,7 +254,7 @@
 			#interrupt-cells = <2>;
 			interrupt-controller;
 			clocks = <&cpg CPG_MOD 906>;
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 		};
 
 		gpio7: gpio@e6055800 {
@@ -261,7 +268,7 @@
 			#interrupt-cells = <2>;
 			interrupt-controller;
 			clocks = <&cpg CPG_MOD 905>;
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 		};
 
 		pmu_a57 {
@@ -297,6 +304,12 @@
 			#power-domain-cells = <0>;
 		};
 
+		sysc: system-controller@e6180000 {
+			compatible = "renesas,r8a7795-sysc";
+			reg = <0 0xe6180000 0 0x0400>;
+			#power-domain-cells = <1>;
+		};
+
 		audma0: dma-controller@ec700000 {
 			compatible = "renesas,rcar-dmac";
 			reg = <0 0xec700000 0 0x10000>;
@@ -324,7 +337,7 @@
 					"ch12", "ch13", "ch14", "ch15";
 			clocks = <&cpg CPG_MOD 502>;
 			clock-names = "fck";
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			#dma-cells = <1>;
 			dma-channels = <16>;
 		};
@@ -356,7 +369,7 @@
 					"ch12", "ch13", "ch14", "ch15";
 			clocks = <&cpg CPG_MOD 501>;
 			clock-names = "fck";
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			#dma-cells = <1>;
 			dma-channels = <16>;
 		};
@@ -378,7 +391,7 @@
 				      GIC_SPI 18 IRQ_TYPE_LEVEL_HIGH
 				      GIC_SPI 161 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 407>;
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 		};
 
 		dmac0: dma-controller@e6700000 {
@@ -409,7 +422,7 @@
 					"ch12", "ch13", "ch14", "ch15";
 			clocks = <&cpg CPG_MOD 219>;
 			clock-names = "fck";
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			#dma-cells = <1>;
 			dma-channels = <16>;
 		};
@@ -442,7 +455,7 @@
 					"ch12", "ch13", "ch14", "ch15";
 			clocks = <&cpg CPG_MOD 218>;
 			clock-names = "fck";
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			#dma-cells = <1>;
 			dma-channels = <16>;
 		};
@@ -475,7 +488,7 @@
 					"ch12", "ch13", "ch14", "ch15";
 			clocks = <&cpg CPG_MOD 217>;
 			clock-names = "fck";
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			#dma-cells = <1>;
 			dma-channels = <16>;
 		};
@@ -517,7 +530,7 @@
 					  "ch20", "ch21", "ch22", "ch23",
 					  "ch24";
 			clocks = <&cpg CPG_MOD 812>;
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			phy-mode = "rgmii-id";
 			#address-cells = <1>;
 			#size-cells = <0>;
@@ -535,7 +548,7 @@
 			clock-names = "fck", "brg_int", "scif_clk";
 			dmas = <&dmac1 0x31>, <&dmac1 0x30>;
 			dma-names = "tx", "rx";
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			status = "disabled";
 		};
 
@@ -551,7 +564,7 @@
 			clock-names = "fck", "brg_int", "scif_clk";
 			dmas = <&dmac1 0x33>, <&dmac1 0x32>;
 			dma-names = "tx", "rx";
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			status = "disabled";
 		};
 
@@ -567,7 +580,7 @@
 			clock-names = "fck", "brg_int", "scif_clk";
 			dmas = <&dmac1 0x35>, <&dmac1 0x34>;
 			dma-names = "tx", "rx";
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			status = "disabled";
 		};
 
@@ -583,7 +596,7 @@
 			clock-names = "fck", "brg_int", "scif_clk";
 			dmas = <&dmac0 0x37>, <&dmac0 0x36>;
 			dma-names = "tx", "rx";
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			status = "disabled";
 		};
 
@@ -599,7 +612,7 @@
 			clock-names = "fck", "brg_int", "scif_clk";
 			dmas = <&dmac0 0x39>, <&dmac0 0x38>;
 			dma-names = "tx", "rx";
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			status = "disabled";
 		};
 
@@ -614,7 +627,7 @@
 			clock-names = "fck", "brg_int", "scif_clk";
 			dmas = <&dmac1 0x51>, <&dmac1 0x50>;
 			dma-names = "tx", "rx";
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			status = "disabled";
 		};
 
@@ -629,7 +642,7 @@
 			clock-names = "fck", "brg_int", "scif_clk";
 			dmas = <&dmac1 0x53>, <&dmac1 0x52>;
 			dma-names = "tx", "rx";
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			status = "disabled";
 		};
 
@@ -644,7 +657,7 @@
 			clock-names = "fck", "brg_int", "scif_clk";
 			dmas = <&dmac1 0x13>, <&dmac1 0x12>;
 			dma-names = "tx", "rx";
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			status = "disabled";
 		};
 
@@ -659,7 +672,7 @@
 			clock-names = "fck", "brg_int", "scif_clk";
 			dmas = <&dmac0 0x57>, <&dmac0 0x56>;
 			dma-names = "tx", "rx";
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			status = "disabled";
 		};
 
@@ -674,7 +687,7 @@
 			clock-names = "fck", "brg_int", "scif_clk";
 			dmas = <&dmac0 0x59>, <&dmac0 0x58>;
 			dma-names = "tx", "rx";
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			status = "disabled";
 		};
 
@@ -689,7 +702,7 @@
 			clock-names = "fck", "brg_int", "scif_clk";
 			dmas = <&dmac1 0x5b>, <&dmac1 0x5a>;
 			dma-names = "tx", "rx";
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			status = "disabled";
 		};
 
@@ -700,7 +713,7 @@
 			reg = <0 0xe6500000 0 0x40>;
 			interrupts = <GIC_SPI 287 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 931>;
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			i2c-scl-internal-delay-ns = <110>;
 			status = "disabled";
 		};
@@ -712,7 +725,7 @@
 			reg = <0 0xe6508000 0 0x40>;
 			interrupts = <GIC_SPI 288 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 930>;
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			i2c-scl-internal-delay-ns = <6>;
 			status = "disabled";
 		};
@@ -724,7 +737,7 @@
 			reg = <0 0xe6510000 0 0x40>;
 			interrupts = <GIC_SPI 286 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 929>;
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			i2c-scl-internal-delay-ns = <6>;
 			status = "disabled";
 		};
@@ -736,7 +749,7 @@
 			reg = <0 0xe66d0000 0 0x40>;
 			interrupts = <GIC_SPI 290 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 928>;
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			i2c-scl-internal-delay-ns = <110>;
 			status = "disabled";
 		};
@@ -748,7 +761,7 @@
 			reg = <0 0xe66d8000 0 0x40>;
 			interrupts = <GIC_SPI 19 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 927>;
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			i2c-scl-internal-delay-ns = <110>;
 			status = "disabled";
 		};
@@ -760,7 +773,7 @@
 			reg = <0 0xe66e0000 0 0x40>;
 			interrupts = <GIC_SPI 20 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 919>;
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			i2c-scl-internal-delay-ns = <110>;
 			status = "disabled";
 		};
@@ -772,7 +785,7 @@
 			reg = <0 0xe66e8000 0 0x40>;
 			interrupts = <GIC_SPI 21 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 918>;
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			i2c-scl-internal-delay-ns = <6>;
 			status = "disabled";
 		};
@@ -822,7 +835,7 @@
 				      "src.1", "src.0",
 				      "dvc.0", "dvc.1",
 				      "clk_a", "clk_b", "clk_c", "clk_i";
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			status = "disabled";
 
 			rcar_sound,dvc {
@@ -956,7 +969,7 @@
 			reg = <0 0xee000000 0 0xc00>;
 			interrupts = <GIC_SPI 102 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 328>;
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			status = "disabled";
 		};
 
@@ -965,7 +978,7 @@
 			reg = <0 0xee040000 0 0xc00>;
 			interrupts = <GIC_SPI 98 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 327>;
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			status = "disabled";
 		};
 
@@ -977,7 +990,7 @@
 				      GIC_SPI 109 IRQ_TYPE_LEVEL_HIGH>;
 			interrupt-names = "ch0", "ch1";
 			clocks = <&cpg CPG_MOD 330>;
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			#dma-cells = <1>;
 			dma-channels = <2>;
 		};
@@ -990,7 +1003,7 @@
 				      GIC_SPI 110 IRQ_TYPE_LEVEL_HIGH>;
 			interrupt-names = "ch0", "ch1";
 			clocks = <&cpg CPG_MOD 331>;
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			#dma-cells = <1>;
 			dma-channels = <2>;
 		};
@@ -1000,7 +1013,7 @@
 			reg = <0 0xee100000 0 0x2000>;
 			interrupts = <GIC_SPI 165 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 314>;
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			status = "disabled";
 		};
 
@@ -1009,7 +1022,7 @@
 			reg = <0 0xee120000 0 0x2000>;
 			interrupts = <GIC_SPI 166 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 313>;
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			status = "disabled";
 		};
 
@@ -1018,7 +1031,7 @@
 			reg = <0 0xee140000 0 0x2000>;
 			interrupts = <GIC_SPI 167 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 312>;
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			cap-mmc-highspeed;
 			status = "disabled";
 		};
@@ -1028,7 +1041,7 @@
 			reg = <0 0xee160000 0 0x2000>;
 			interrupts = <GIC_SPI 168 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 311>;
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			cap-mmc-highspeed;
 			status = "disabled";
 		};
@@ -1038,7 +1051,7 @@
 			reg = <0 0xee080200 0 0x700>;
 			interrupts = <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 703>;
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			#phy-cells = <0>;
 			status = "disabled";
 		};
@@ -1047,7 +1060,7 @@
 			compatible = "renesas,usb2-phy-r8a7795";
 			reg = <0 0xee0a0200 0 0x700>;
 			clocks = <&cpg CPG_MOD 702>;
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			#phy-cells = <0>;
 			status = "disabled";
 		};
@@ -1056,7 +1069,7 @@
 			compatible = "renesas,usb2-phy-r8a7795";
 			reg = <0 0xee0c0200 0 0x700>;
 			clocks = <&cpg CPG_MOD 701>;
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			#phy-cells = <0>;
 			status = "disabled";
 		};
@@ -1068,7 +1081,7 @@
 			clocks = <&cpg CPG_MOD 703>;
 			phys = <&usb2_phy0>;
 			phy-names = "usb";
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			status = "disabled";
 		};
 
@@ -1079,7 +1092,7 @@
 			clocks = <&cpg CPG_MOD 702>;
 			phys = <&usb2_phy1>;
 			phy-names = "usb";
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			status = "disabled";
 		};
 
@@ -1090,7 +1103,7 @@
 			clocks = <&cpg CPG_MOD 701>;
 			phys = <&usb2_phy2>;
 			phy-names = "usb";
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			status = "disabled";
 		};
 
@@ -1101,7 +1114,7 @@
 			clocks = <&cpg CPG_MOD 703>;
 			phys = <&usb2_phy0>;
 			phy-names = "usb";
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			status = "disabled";
 		};
 
@@ -1112,7 +1125,7 @@
 			clocks = <&cpg CPG_MOD 702>;
 			phys = <&usb2_phy1>;
 			phy-names = "usb";
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			status = "disabled";
 		};
 
@@ -1123,7 +1136,7 @@
 			clocks = <&cpg CPG_MOD 701>;
 			phys = <&usb2_phy2>;
 			phy-names = "usb";
-			power-domains = <&cpg>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			status = "disabled";
 		};
 	};
