arm64: dts: Add Airoha EN7581 SoC and EN7581 Evaluation Board

Introduce the Airoha EN7581 SoC's dtsi and the Airoha EN7581 Evaluation
Board's dts file, as well as the required Makefiles.

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Daniel Danzberger <dd@embedd.com>
Co-developed-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://lore.kernel.org/r/f05a36dd7e8ef34ead8a63aa10fcffb542229404.1709975956.git.lorenzo@kernel.org
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>

arch/arm64/boot/dts/Makefile

@@ -1,5 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 subdir-y += actions
+subdir-y += airoha
 subdir-y += allwinner
 subdir-y += altera
 subdir-y += amazon

arch/arm64/boot/dts/airoha/Makefile

@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+dtb-$(CONFIG_ARCH_AIROHA) += en7581-evb.dtb

arch/arm64/boot/dts/airoha/en7581-evb.dts

@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+/dts-v1/;
+
+/* Bootloader installs ATF here */
+/memreserve/ 0x80000000 0x200000;
+
+#include "en7581.dtsi"
+
+/ {
+	model = "Airoha EN7581 Evaluation Board";
+	compatible = "airoha,en7581-evb", "airoha,en7581";
+
+	aliases {
+		serial0 = &uart1;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+		linux,usable-memory-range = <0x0 0x80200000 0x0 0x1fe00000>;
+	};
+
+	memory@80000000 {
+		device_type = "memory";
+		reg = <0x0 0x80000000 0x2 0x00000000>;
+	};
+};

arch/arm64/boot/dts/airoha/en7581.dtsi

@@ -0,0 +1,154 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+
+/ {
+	interrupt-parent = <&gic>;
+	#address-cells = <2>;
+	#size-cells = <2>;
+
+	reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		npu-binary@84000000 {
+			no-map;
+			reg = <0x0 0x84000000 0x0 0xa00000>;
+		};
+
+		npu-flag@84b0000 {
+			no-map;
+			reg = <0x0 0x84b00000 0x0 0x100000>;
+		};
+
+		npu-pkt@85000000 {
+			no-map;
+			reg = <0x0 0x85000000 0x0 0x1a00000>;
+		};
+
+		npu-phyaddr@86b00000 {
+			no-map;
+			reg = <0x0 0x86b00000 0x0 0x100000>;
+		};
+
+		npu-rxdesc@86d00000 {
+			no-map;
+			reg = <0x0 0x86d00000 0x0 0x100000>;
+		};
+	};
+
+	psci {
+		compatible = "arm,psci-1.0";
+		method = "smc";
+	};
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		cpu-map {
+			cluster0 {
+				core0 {
+					cpu = <&cpu0>;
+				};
+
+				core1 {
+					cpu = <&cpu1>;
+				};
+
+				core2 {
+					cpu = <&cpu2>;
+				};
+
+				core3 {
+					cpu = <&cpu3>;
+				};
+			};
+		};
+
+		cpu0: cpu@0 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a53";
+			reg = <0x0>;
+			enable-method = "psci";
+			clock-frequency = <80000000>;
+			next-level-cache = <&l2>;
+		};
+
+		cpu1: cpu@1 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a53";
+			reg = <0x1>;
+			enable-method = "psci";
+			clock-frequency = <80000000>;
+			next-level-cache = <&l2>;
+		};
+
+		cpu2: cpu@2 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a53";
+			reg = <0x2>;
+			enable-method = "psci";
+			clock-frequency = <80000000>;
+			next-level-cache = <&l2>;
+		};
+
+		cpu3: cpu@3 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a53";
+			reg = <0x3>;
+			enable-method = "psci";
+			clock-frequency = <80000000>;
+			next-level-cache = <&l2>;
+		};
+
+		l2: l2-cache {
+			compatible = "cache";
+			cache-size = <0x80000>;
+			cache-line-size = <64>;
+			cache-level = <2>;
+			cache-unified;
+		};
+	};
+
+	timer {
+		compatible = "arm,armv8-timer";
+		interrupt-parent = <&gic>;
+		interrupts = <GIC_PPI 13 IRQ_TYPE_LEVEL_LOW>,
+			     <GIC_PPI 14 IRQ_TYPE_LEVEL_LOW>,
+			     <GIC_PPI 11 IRQ_TYPE_LEVEL_LOW>,
+			     <GIC_PPI 10 IRQ_TYPE_LEVEL_LOW>;
+	};
+
+	soc {
+		compatible = "simple-bus";
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		gic: interrupt-controller@9000000 {
+			compatible = "arm,gic-v3";
+			interrupt-controller;
+			#interrupt-cells = <3>;
+			#address-cells = <1>;
+			#size-cells = <1>;
+			reg = <0x0 0x09000000 0x0 0x20000>,
+			      <0x0 0x09080000 0x0 0x80000>,
+			      <0x0 0x09400000 0x0 0x2000>,
+			      <0x0 0x09500000 0x0 0x2000>,
+			      <0x0 0x09600000 0x0 0x20000>;
+			interrupts = <GIC_PPI 9 IRQ_TYPE_LEVEL_LOW>;
+		};
+
+		uart1: serial@1fbf0000 {
+			compatible = "ns16550";
+			reg = <0x0 0x1fbf0000 0x0 0x30>;
+			reg-io-width = <4>;
+			reg-shift = <2>;
+			interrupts = <GIC_SPI 18 IRQ_TYPE_LEVEL_HIGH>;
+			clock-frequency = <1843200>;
+		};
+	};
+};