arm64: dts: intel: add device tree for n6000

Add a device tree for the n6000 instantiation of Agilex
Hard Processor System (HPS).
Signed-off-by: Matthew Gerlach <matthew.gerlach@linux.intel.com>
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>

arch/arm64/boot/dts/intel/Makefile

 # SPDX-License-Identifier: GPL-2.0-only
-dtb-$(CONFIG_ARCH_INTEL_SOCFPGA) += socfpga_agilex_socdk.dtb \
+dtb-$(CONFIG_ARCH_INTEL_SOCFPGA) += socfpga_agilex_n6000.dtb \
+				socfpga_agilex_socdk.dtb \
 				socfpga_agilex_socdk_nand.dtb \
 				socfpga_n5x_socdk.dtb
 dtb-$(CONFIG_ARCH_KEEMBAY) += keembay-evm.dtb

arch/arm64/boot/dts/intel/socfpga_agilex_n6000.dts

+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021-2022, Intel Corporation
+ */
+#include "socfpga_agilex.dtsi"
+
+/ {
+	model = "SoCFPGA Agilex n6000";
+	compatible = "intel,socfpga-agilex-n6000", "intel,socfpga-agilex";
+
+	aliases {
+		serial0 = &uart1;
+		serial1 = &uart0;
+		ethernet0 = &gmac0;
+		ethernet1 = &gmac1;
+		ethernet2 = &gmac2;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	memory@0 {
+		device_type = "memory";
+		/* We expect the bootloader to fill in the reg */
+		reg = <0 0 0 0>;
+	};
+
+	soc {
+		bus@80000000 {
+			compatible = "simple-bus";
+			reg = <0x80000000 0x60000000>,
+				<0xf9000000 0x00100000>;
+			reg-names = "axi_h2f", "axi_h2f_lw";
+			#address-cells = <2>;
+			#size-cells = <1>;
+			ranges = <0x00000000 0x00000000 0xf9000000 0x00001000>;
+
+			dma-controller@0 {
+				compatible = "intel,hps-copy-engine";
+				reg = <0x00000000 0x00000000 0x00001000>;
+				#dma-cells = <1>;
+			};
+		};
+	};
+};
+
+&osc1 {
+	clock-frequency = <25000000>;
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&uart1 {
+	status = "okay";
+};
+
+&watchdog0 {
+	status = "okay";
+};
+
+&fpga_mgr {
+	status = "disabled";
+};