ARM: dts: r8a7742: Add PCIe Controller device node

Add a device node for the PCIe controller on the Renesas
RZ/G1H (r8a7742) SoC.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Chris Paterson <Chris.Paterson2@renesas.com>
Link: https://lore.kernel.org/r/20200810174156.30880-3-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

arch/arm/boot/dts/r8a7742.dtsi

@@ -188,6 +188,13 @@
 		clock-frequency = <0>;
 	};
 
+	/* External PCIe clock - can be overridden by the board */
+	pcie_bus_clk: pcie_bus {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <0>;
+	};
+
 	pmu-0 {
 		compatible = "arm,cortex-a15-pmu";
 		interrupts-extended = <&gic GIC_SPI 72 IRQ_TYPE_LEVEL_HIGH>,
@@ -1509,6 +1516,34 @@
 			resets = <&cpg 408>;
 		};
 
+		pciec: pcie@fe000000 {
+			compatible = "renesas,pcie-r8a7742",
+				     "renesas,pcie-rcar-gen2";
+			reg = <0 0xfe000000 0 0x80000>;
+			#address-cells = <3>;
+			#size-cells = <2>;
+			bus-range = <0x00 0xff>;
+			device_type = "pci";
+			ranges = <0x01000000 0 0x00000000 0 0xfe100000 0 0x00100000>,
+				 <0x02000000 0 0xfe200000 0 0xfe200000 0 0x00200000>,
+				 <0x02000000 0 0x30000000 0 0x30000000 0 0x08000000>,
+				 <0x42000000 0 0x38000000 0 0x38000000 0 0x08000000>;
+			/* Map all possible DDR as inbound ranges */
+			dma-ranges = <0x42000000 0 0x40000000 0 0x40000000 0 0x80000000>,
+				     <0x43000000 1 0x80000000 1 0x80000000 0 0x80000000>;
+			interrupts = <GIC_SPI 116 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 117 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 118 IRQ_TYPE_LEVEL_HIGH>;
+			#interrupt-cells = <1>;
+			interrupt-map-mask = <0 0 0 0>;
+			interrupt-map = <0 0 0 0 &gic GIC_SPI 116 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 319>, <&pcie_bus_clk>;
+			clock-names = "pcie", "pcie_bus";
+			power-domains = <&sysc R8A7742_PD_ALWAYS_ON>;
+			resets = <&cpg 319>;
+			status = "disabled";
+		};
+
 		du: display@feb00000 {
 			compatible = "renesas,du-r8a7742";
 			reg = <0 0xfeb00000 0 0x70000>;