ramips: add support for JCG JHR-AC876M

JCG JHR-AC876M is an AC2600M router

Hardware specs:
  SoC: MT7621AT
  2.4GHz: MT7615N 4x4 @ PCIe0
  5GHz: MT7615N 4x4 @ PCIe1
  Flash: Winbond W25Q128JVSQ 16MiB
  RAM: Nanya NT5CB128M16 256MiB
  USB 2.0 and 3.0 ports
  6 LEDs, 3 of which are connected to SoC GPIO
  Reset and WPS buttons

Flash instructions:
Stock to OpenWrt:
  Upload factory.bin in stock firmware's upgrade page,
  do not preserve settings

OpenWrt to stock:
  Push and hold the reset button for 5s while power cycling to
  enter recovery mode;
  Visit 192.168.1.1 and upload stock firmware

MAC addresses map:
  0x0004  *:1c  wlan2g/wan/label
  0x8004  *:20  wlan5g
  0xe000  *:1b  lan
  0xe006  *:1a  not used in stock fw

Signed-off-by: DENG Qingfang <dengqf6@mail2.sysu.edu.cn>

target/linux/ramips/dts/mt7621_jcg_jhr-ac876m.dts

@@ -0,0 +1,144 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/dts-v1/;
+
+#include "mt7621.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	compatible = "jcg,jhr-ac876m", "mediatek,mt7621-soc";
+	model = "JCG JHR-AC876M";
+
+	aliases {
+		led-boot = &led_wps;
+		led-failsafe = &led_wps;
+		led-running = &led_wps;
+		led-upgrade = &led_wps;
+	};
+
+	chosen {
+		bootargs = "console=ttyS0,57600";
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		usb3 {
+			label = "jhr-ac876m:blue:usb3";
+			gpios = <&gpio0 3 GPIO_ACTIVE_LOW>;
+			trigger-sources = <&xhci_ehci_port1>;
+			linux,default-trigger = "usbport";
+		};
+
+		usb2 {
+			label = "jhr-ac876m:blue:usb2";
+			gpios = <&gpio0 6 GPIO_ACTIVE_LOW>;
+			trigger-sources = <&ehci_port2>;
+			linux,default-trigger = "usbport";
+		};
+
+		led_wps: wps {
+			label = "jhr-ac876m:blue:wps";
+			gpios = <&gpio0 14 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "reset";
+			gpios = <&gpio0 16 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+
+		wps {
+			label = "wps";
+			gpios = <&gpio0 18 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_WPS_BUTTON>;
+		};
+	};
+};
+
+&spi0 {
+	status = "okay";
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <80000000>;
+		m25p,fast-read;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "u-boot";
+				reg = <0x0 0x30000>;
+				read-only;
+			};
+
+			partition@30000 {
+				label = "u-boot-env";
+				reg = <0x30000 0x10000>;
+				read-only;
+			};
+
+			factory: partition@40000 {
+				label = "factory";
+				reg = <0x40000 0x10000>;
+				read-only;
+			};
+
+			partition@50000 {
+				compatible = "denx,uimage";
+				label = "firmware";
+				reg = <0x50000 0xfb0000>;
+			};
+		};
+	};
+};
+
+&pcie {
+	status = "okay";
+};
+
+&pcie0 {
+	wifi@0,0 {
+		compatible = "mediatek,mt76";
+		reg = <0x0000 0 0 0 0>;
+		mediatek,mtd-eeprom = <&factory 0x0>;
+		ieee80211-freq-limit = <2400000 2500000>;
+
+		led {
+			led-active-low;
+		};
+	};
+};
+
+&pcie1 {
+	wifi@0,0 {
+		compatible = "mediatek,mt76";
+		reg = <0x0000 0 0 0 0>;
+		mediatek,mtd-eeprom = <&factory 0x8000>;
+		ieee80211-freq-limit = <5000000 6000000>;
+
+		led {
+			led-active-low;
+		};
+	};
+};
+
+&ethernet {
+	mtd-mac-address = <&factory 0xe000>;
+};
+
+&state_default {
+	gpio {
+		ralink,group = "i2c", "uart3", "jtag", "wdt";
+		ralink,function = "gpio";
+	};
+};

target/linux/ramips/image/mt7621.mk

@@ -371,6 +371,19 @@ define Device/iptime_a6ns-m
 endef
 TARGET_DEVICES += iptime_a6ns-m
 
+define Device/jcg_jhr-ac876m
+  MTK_SOC := mt7621
+  IMAGE_SIZE := 16064k
+  IMAGES += factory.bin
+  IMAGE/factory.bin := \
+        $$(sysupgrade_bin) | check-size $$$$(IMAGE_SIZE) | jcg-header 89.1
+  JCG_MAXSIZE := 16064k
+  DEVICE_VENDOR := JCG
+  DEVICE_MODEL := JHR-AC876M
+  DEVICE_PACKAGES := kmod-mt7615e kmod-usb3 kmod-usb-ledtrig-usbport wpad-basic
+endef
+TARGET_DEVICES += jcg_jhr-ac876m
+
 define Device/lenovo_newifi-d1
   MTK_SOC := mt7621
   IMAGE_SIZE := 32448k

target/linux/ramips/mt7621/base-files/etc/board.d/02_network

@@ -14,6 +14,7 @@ ramips_setup_interfaces()
 	d-team,pbr-m1|\
 	firefly,firewrt|\
 	hiwifi,hc5962|\
+	jcg,jhr-ac876m|\
 	mediatek,ap-mt7621a-v60|\
 	mediatek,mt7621-eval-board|\
 	mqmaker,witi|\
@@ -222,6 +223,10 @@ ramips_setup_macs()
 	iptime,a6ns-m)
 		wan_mac=$(mtd_get_mac_binary u-boot 0x1fc40)
 		;;
+	jcg,jhr-ac876m)
+		label_mac=$(mtd_get_mac_binary factory 0x4)
+		wan_mac=$label_mac
+		;;
 	mediatek,ap-mt7621a-v60)
 		wan_mac=$(macaddr_add "$(mtd_get_mac_binary factory 0x5)" 1)
 		;;