diff --git a/arch/arm/boot/dts/r8a7794.dtsi b/arch/arm/boot/dts/r8a7794.dtsi
index b03a77b3d22f..7d4c5597af5b 100644
--- a/arch/arm/boot/dts/r8a7794.dtsi
+++ b/arch/arm/boot/dts/r8a7794.dtsi
@@ -403,8 +403,9 @@ scif0: serial@e6e60000 {
 			     "renesas,scif";
 		reg = <0 0xe6e60000 0 64>;
 		interrupts = <GIC_SPI 152 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&mstp7_clks R8A7794_CLK_SCIF0>;
-		clock-names = "fck";
+		clocks = <&mstp7_clks R8A7794_CLK_SCIF0>, <&zs_clk>,
+			 <&scif_clk>;
+		clock-names = "fck", "brg_int", "scif_clk";
 		dmas = <&dmac0 0x29>, <&dmac0 0x2a>;
 		dma-names = "tx", "rx";
 		power-domains = <&cpg_clocks>;
@@ -416,8 +417,9 @@ scif1: serial@e6e68000 {
 			     "renesas,scif";
 		reg = <0 0xe6e68000 0 64>;
 		interrupts = <GIC_SPI 153 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&mstp7_clks R8A7794_CLK_SCIF1>;
-		clock-names = "fck";
+		clocks = <&mstp7_clks R8A7794_CLK_SCIF1>, <&zs_clk>,
+			 <&scif_clk>;
+		clock-names = "fck", "brg_int", "scif_clk";
 		dmas = <&dmac0 0x2d>, <&dmac0 0x2e>;
 		dma-names = "tx", "rx";
 		power-domains = <&cpg_clocks>;
@@ -429,8 +431,9 @@ scif2: serial@e6e58000 {
 			     "renesas,scif";
 		reg = <0 0xe6e58000 0 64>;
 		interrupts = <GIC_SPI 22 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&mstp7_clks R8A7794_CLK_SCIF2>;
-		clock-names = "fck";
+		clocks = <&mstp7_clks R8A7794_CLK_SCIF2>, <&zs_clk>,
+			 <&scif_clk>;
+		clock-names = "fck", "brg_int", "scif_clk";
 		dmas = <&dmac0 0x2b>, <&dmac0 0x2c>;
 		dma-names = "tx", "rx";
 		power-domains = <&cpg_clocks>;
@@ -442,8 +445,9 @@ scif3: serial@e6ea8000 {
 			     "renesas,scif";
 		reg = <0 0xe6ea8000 0 64>;
 		interrupts = <GIC_SPI 23 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&mstp7_clks R8A7794_CLK_SCIF3>;
-		clock-names = "fck";
+		clocks = <&mstp7_clks R8A7794_CLK_SCIF3>, <&zs_clk>,
+			 <&scif_clk>;
+		clock-names = "fck", "brg_int", "scif_clk";
 		dmas = <&dmac0 0x2f>, <&dmac0 0x30>;
 		dma-names = "tx", "rx";
 		power-domains = <&cpg_clocks>;
@@ -455,8 +459,9 @@ scif4: serial@e6ee0000 {
 			     "renesas,scif";
 		reg = <0 0xe6ee0000 0 64>;
 		interrupts = <GIC_SPI 24 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&mstp7_clks R8A7794_CLK_SCIF4>;
-		clock-names = "fck";
+		clocks = <&mstp7_clks R8A7794_CLK_SCIF4>, <&zs_clk>,
+			 <&scif_clk>;
+		clock-names = "fck", "brg_int", "scif_clk";
 		dmas = <&dmac0 0xfb>, <&dmac0 0xfc>;
 		dma-names = "tx", "rx";
 		power-domains = <&cpg_clocks>;
@@ -468,8 +473,9 @@ scif5: serial@e6ee8000 {
 			     "renesas,scif";
 		reg = <0 0xe6ee8000 0 64>;
 		interrupts = <GIC_SPI 25 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&mstp7_clks R8A7794_CLK_SCIF5>;
-		clock-names = "fck";
+		clocks = <&mstp7_clks R8A7794_CLK_SCIF5>, <&zs_clk>,
+			 <&scif_clk>;
+		clock-names = "fck", "brg_int", "scif_clk";
 		dmas = <&dmac0 0xfd>, <&dmac0 0xfe>;
 		dma-names = "tx", "rx";
 		power-domains = <&cpg_clocks>;
@@ -481,8 +487,9 @@ hscif0: serial@e62c0000 {
 			     "renesas,rcar-gen2-hscif", "renesas,hscif";
 		reg = <0 0xe62c0000 0 96>;
 		interrupts = <GIC_SPI 154 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&mstp7_clks R8A7794_CLK_HSCIF0>;
-		clock-names = "fck";
+		clocks = <&mstp7_clks R8A7794_CLK_HSCIF0>, <&zs_clk>,
+			 <&scif_clk>;
+		clock-names = "fck", "brg_int", "scif_clk";
 		dmas = <&dmac0 0x39>, <&dmac0 0x3a>;
 		dma-names = "tx", "rx";
 		power-domains = <&cpg_clocks>;
@@ -494,8 +501,9 @@ hscif1: serial@e62c8000 {
 			     "renesas,rcar-gen2-hscif", "renesas,hscif";
 		reg = <0 0xe62c8000 0 96>;
 		interrupts = <GIC_SPI 155 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&mstp7_clks R8A7794_CLK_HSCIF1>;
-		clock-names = "fck";
+		clocks = <&mstp7_clks R8A7794_CLK_HSCIF1>, <&zs_clk>,
+			 <&scif_clk>;
+		clock-names = "fck", "brg_int", "scif_clk";
 		dmas = <&dmac0 0x4d>, <&dmac0 0x4e>;
 		dma-names = "tx", "rx";
 		power-domains = <&cpg_clocks>;
@@ -507,8 +515,9 @@ hscif2: serial@e62d0000 {
 			     "renesas,rcar-gen2-hscif", "renesas,hscif";
 		reg = <0 0xe62d0000 0 96>;
 		interrupts = <GIC_SPI 21 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&mstp7_clks R8A7794_CLK_HSCIF2>;
-		clock-names = "fck";
+		clocks = <&mstp7_clks R8A7794_CLK_HSCIF2>, <&zs_clk>,
+			 <&scif_clk>;
+		clock-names = "fck", "brg_int", "scif_clk";
 		dmas = <&dmac0 0x3b>, <&dmac0 0x3c>;
 		dma-names = "tx", "rx";
 		power-domains = <&cpg_clocks>;
@@ -815,6 +824,15 @@ extal_clk: extal_clk {
 			clock-output-names = "extal";
 		};
 
+		/* External SCIF clock */
+		scif_clk: scif {
+			compatible = "fixed-clock";
+			#clock-cells = <0>;
+			/* This value must be overridden by the board. */
+			clock-frequency = <0>;
+			status = "disabled";
+		};
+
 		/* Special CPG clocks */
 		cpg_clocks: cpg_clocks@e6150000 {
 			compatible = "renesas,r8a7794-cpg-clocks",