ARM: dts: BCM5301X: Add DT for ASUS RT-AC5300

Add the device tree for ASUS RT-AC5300 which is an AC5300 router featuring
5 Ethernet ports over the integrated Broadcom switch.

Hardware info:
* Processor: Broadcom BCM4709C0 dual-core @ 1.4 GHz
* Switch: BCM53012 in BCM4709C0
* DDR3 RAM: 512 MB
* Flash: 128 MB
* 2.4GHz: BCM4366 4x4 single chip 802.11b/g/n SoC
* 5GHz: BCM4366 4x4 two chips 802.11a/n/ac SoC
* Ports: 4 LAN Ports, 1 WAN Port

Co-developed-by: Tom Brautaset <tbrautaset@gmail.com>
Signed-off-by: Tom Brautaset <tbrautaset@gmail.com>
Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20240423-for-soc-asus-rt-ac3200-ac5300-v3-4-23d33cfafe7a@arinc9.com
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>

Author: arinc9

arch/arm/boot/dts/broadcom/Makefile

@@ -72,6 +72,7 @@ dtb-$(CONFIG_ARCH_BCM_5301X) += \
 	bcm4709-netgear-r8000.dtb \
 	bcm4709-tplink-archer-c9-v1.dtb \
 	bcm47094-asus-rt-ac3100.dtb \
+	bcm47094-asus-rt-ac5300.dtb \
 	bcm47094-asus-rt-ac88u.dtb \
 	bcm47094-dlink-dir-885l.dtb \
 	bcm47094-dlink-dir-890l.dtb \

arch/arm/boot/dts/broadcom/bcm47094-asus-rt-ac5300.dts

@@ -0,0 +1,156 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/*
+ * Author: Tom Brautaset <tbrautaset@gmail.com>
+ */
+
+/dts-v1/;
+
+#include "bcm47094.dtsi"
+#include "bcm5301x-nand-cs0-bch8.dtsi"
+
+#include <dt-bindings/leds/common.h>
+
+/ {
+	compatible = "asus,rt-ac5300", "brcm,bcm47094", "brcm,bcm4708";
+	model = "ASUS RT-AC5300";
+
+	memory@0 {
+		reg = <0x00000000 0x08000000>,
+		      <0x88000000 0x18000000>;
+		device_type = "memory";
+	};
+
+	nvram@1c080000 {
+		compatible = "brcm,nvram";
+		reg = <0x1c080000 0x00180000>;
+
+		et1macaddr: et1macaddr {
+			#nvmem-cell-cells = <1>;
+		};
+	};
+
+	gpio-keys {
+		compatible = "gpio-keys";
+
+		button-reset {
+			label = "Reset";
+			linux,code = <KEY_RESTART>;
+			gpios = <&chipcommon 11 GPIO_ACTIVE_LOW>;
+		};
+
+		button-wifi {
+			label = "Wi-Fi";
+			linux,code = <KEY_RFKILL>;
+			gpios = <&chipcommon 20 GPIO_ACTIVE_LOW>;
+		};
+
+		button-wps {
+			label = "WPS";
+			linux,code = <KEY_WPS_BUTTON>;
+			gpios = <&chipcommon 18 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led-lan {
+			color = <LED_COLOR_ID_WHITE>;
+			function = LED_FUNCTION_LAN;
+			gpios = <&chipcommon 21 GPIO_ACTIVE_LOW>;
+		};
+
+		led-power {
+			color = <LED_COLOR_ID_WHITE>;
+			function = LED_FUNCTION_POWER;
+			gpios = <&chipcommon 3 GPIO_ACTIVE_LOW>;
+			linux,default-trigger = "default-on";
+		};
+
+		led-wan-red {
+			color = <LED_COLOR_ID_RED>;
+			function = LED_FUNCTION_WAN;
+			gpios = <&chipcommon 5 GPIO_ACTIVE_HIGH>;
+		};
+
+		led-wps {
+			color = <LED_COLOR_ID_WHITE>;
+			function = LED_FUNCTION_WPS;
+			gpios = <&chipcommon 19 GPIO_ACTIVE_LOW>;
+		};
+	};
+};
+
+&gmac0 {
+	nvmem-cells = <&et1macaddr 0>;
+	nvmem-cell-names = "mac-address";
+};
+
+&gmac1 {
+	nvmem-cells = <&et1macaddr 1>;
+	nvmem-cell-names = "mac-address";
+};
+
+&gmac2 {
+	nvmem-cells = <&et1macaddr 2>;
+	nvmem-cell-names = "mac-address";
+};
+
+&nandcs {
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		partition@0 {
+			reg = <0x00000000 0x00080000>;
+			label = "boot";
+			read-only;
+		};
+
+		partition@80000 {
+			reg = <0x00080000 0x00180000>;
+			label = "nvram";
+		};
+
+		partition@200000 {
+			compatible = "brcm,trx";
+			reg = <0x00200000 0x07e00000>;
+			label = "firmware";
+		};
+	};
+};
+
+&srab {
+	status = "okay";
+
+	ports {
+		port@0 {
+			label = "lan4";
+		};
+
+		port@1 {
+			label = "lan3";
+		};
+
+		port@2 {
+			label = "lan2";
+		};
+
+		port@3 {
+			label = "lan1";
+		};
+
+		port@4 {
+			label = "wan";
+		};
+	};
+};
+
+&usb2 {
+	vcc-gpio = <&chipcommon 9 GPIO_ACTIVE_HIGH>;
+};
+
+&usb3_phy {
+	status = "okay";
+};