arm64: dts: renesas: r8a779h0: Add remaining HSCIF nodes

Add device nodes for the remaining High Speed Serial Communication
Interfaces with FIFO (HSCIF) on the Renesas R-Car V4M (R8A779H0) SoC,
including DMA support and the optional external clock source used by
HSCIF2.

Based on a patch in the BSP by Nghia Nguyen.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/b39f081db01fde2d1bf83a193f25b295cfeb002d.1709741303.git.geert+renesas@glider.be

arch/arm64/boot/dts/renesas/r8a779h0.dtsi

@@ -144,13 +144,19 @@ psci {
 		method = "smc";
 	};
 
-	/* External SCIF clock - to be overridden by boards that provide it */
+	/* External SCIF clocks - to be overridden by boards that provide them */
 	scif_clk: scif-clk {
 		compatible = "fixed-clock";
 		#clock-cells = <0>;
 		clock-frequency = <0>;
 	};
 
+	scif_clk2: scif-clk2 {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <0>;
+	};
+
 	soc: soc {
 		compatible = "simple-bus";
 		interrupt-parent = <&gic>;
@@ -413,6 +419,57 @@ hscif0: serial@e6540000 {
 			status = "disabled";
 		};
 
+		hscif1: serial@e6550000 {
+			compatible = "renesas,hscif-r8a779h0",
+				     "renesas,rcar-gen4-hscif", "renesas,hscif";
+			reg = <0 0xe6550000 0 0x60>;
+			interrupts = <GIC_SPI 247 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 515>,
+				 <&cpg CPG_CORE R8A779H0_CLK_SASYNCPERD1>,
+				 <&scif_clk>;
+			clock-names = "fck", "brg_int", "scif_clk";
+			power-domains = <&sysc R8A779H0_PD_ALWAYS_ON>;
+			resets = <&cpg 515>;
+			dmas = <&dmac1 0x33>, <&dmac1 0x32>,
+			       <&dmac2 0x33>, <&dmac2 0x32>;
+			dma-names = "tx", "rx", "tx", "rx";
+			status = "disabled";
+		};
+
+		hscif2: serial@e6560000 {
+			compatible = "renesas,hscif-r8a779h0",
+				     "renesas,rcar-gen4-hscif", "renesas,hscif";
+			reg = <0 0xe6560000 0 0x60>;
+			interrupts = <GIC_SPI 248 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 516>,
+				 <&cpg CPG_CORE R8A779H0_CLK_SASYNCPERD1>,
+				 <&scif_clk2>;
+			clock-names = "fck", "brg_int", "scif_clk";
+			power-domains = <&sysc R8A779H0_PD_ALWAYS_ON>;
+			resets = <&cpg 516>;
+			dmas = <&dmac1 0x35>, <&dmac1 0x34>,
+			       <&dmac2 0x35>, <&dmac2 0x34>;
+			dma-names = "tx", "rx", "tx", "rx";
+			status = "disabled";
+		};
+
+		hscif3: serial@e66a0000 {
+			compatible = "renesas,hscif-r8a779h0",
+				     "renesas,rcar-gen4-hscif", "renesas,hscif";
+			reg = <0 0xe66a0000 0 0x60>;
+			interrupts = <GIC_SPI 249 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 517>,
+				 <&cpg CPG_CORE R8A779H0_CLK_SASYNCPERD1>,
+				 <&scif_clk>;
+			clock-names = "fck", "brg_int", "scif_clk";
+			power-domains = <&sysc R8A779H0_PD_ALWAYS_ON>;
+			resets = <&cpg 517>;
+			dmas = <&dmac1 0x37>, <&dmac1 0x36>,
+			       <&dmac2 0x37>, <&dmac2 0x36>;
+			dma-names = "tx", "rx", "tx", "rx";
+			status = "disabled";
+		};
+
 		avb0: ethernet@e6800000 {
 			compatible = "renesas,etheravb-r8a779h0",
 				     "renesas,etheravb-rcar-gen4";