ramips: add support for AsiaRF AP7621-004 Rev. 3

Specification:

- SoC           : MediaTek MT7621AT, dual-core 880 MHz MIPS CPU
- RAM           : DDR3 512 MB (Micron MT41K256M16TW-107)
- Flash         : SPI-NOR 16 MB (MACRONIX MX25L12835FM2I-10G)
- Ethernet      : 5 port GbE Switch
    - LAN :
        3x RJ-45 Port
        1x PHD Connector (2x5 pin, pitch 2.0 mm)
    - WAN :
        1x RJ-45 Port
- LED           : 8x LEDs
    1x Power (Blue)
    2x MiniPCIe (Orange)
    1x M.2 B Key (Red)
    4x Ethernet activity (White)
- UART          : 1x4 pin header on PCB [J1]
    - arrangement : 3.3V, TX, RX, GND
    - settings    : 57600, 8n1
- Button        : 2x (Reset, WPS)
- USB           : 1x USB 2.0
- Socket       :
    2x MiniPCIe (PCIe Gen2)
    1x M.2 B key (PCIe Gen2 + USB 3.0)
    1x MicroSD
    1x SIM Card
- Power         : 12V DC, 1A

MAC addresses :
    LAN:        00:0A:52:xx:xx:xx   (Factory, 0xe000)
    WAN:        00:0A:52:xx:xx:xx   (Factory, 0xe006)

Flash instruction through LuCI:

This device is flashed OpenWRT base firmware with this target.
The LuCI webpage is integrated in default for upgrading.

Flash instruction through u-boot:

1. Prepare the TFTP server on PC.
2. Connect uart to PC, select "2. Upgrade firmware" in u-boot menu.
3. Select "0 - TFTP client (Default)", input client IP, server IP, flashed bin file path
4. Wait about 60 seconds to complete flashing

Signed-off-by: Elwin Huang <s09289728096@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/19944
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

package/boot/uboot-tools/uboot-envtools/files/ramips

@@ -30,6 +30,7 @@ alfa-network,ax1800rm|\
 allnet,all0256n-4m|\
 allnet,all0256n-8m|\
 allnet,all5002|\
+asiarf,ap7621-004-v3|\
 yuncore,ax820)
 	ubootenv_add_uci_config "/dev/mtd1" "0x0" "0x10000" "0x10000"
 	;;

target/linux/ramips/dts/mt7621_asiarf_ap7621-004-v3.dts

@@ -0,0 +1,138 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "mt7621.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+/ {
+	compatible = "asiarf,ap7621-004-v3", "mediatek,mt7621-soc";
+	model = "AsiaRF AP7621-004 v3";
+
+	keys {
+		compatible = "gpio-keys";
+		
+		wps {
+			label = "wps";
+			gpios = <&gpio 17 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_WPS_BUTTON>;
+		};
+
+		reset {
+			label = "reset";
+			gpios = <&gpio 18 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+	};
+};
+
+&sdhci {
+	status = "okay";
+	non-removable;
+};
+
+&spi0 {
+	status = "okay";
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <40000000>;
+
+		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>;
+			};
+
+			partition@40000 {
+				label = "factory";
+				reg = <0x40000 0x10000>;
+				read-only;
+
+				nvmem-layout {
+					compatible = "fixed-layout";
+					#address-cells = <1>;
+					#size-cells = <1>;
+
+					macaddr_factory_e000: macaddr@e000 {
+						reg = <0xe000 0x6>;
+					};
+
+					macaddr_factory_e006: macaddr@e006 {
+						reg = <0xe006 0x6>;
+					};
+				};
+			};
+
+			partition@50000 {
+				label = "firmware";
+				reg = <0x50000 0xfb0000>;
+				compatible = "denx,uimage";
+			};
+		};
+	};
+};
+
+&pcie {
+	status = "okay";
+};
+
+&ethernet {
+	pinctrl-0 = <&mdio_pins>, <&rgmii1_pins>;
+};
+
+&gmac0 {
+	status = "okay";
+
+	nvmem-cell-names = "mac-address";
+	nvmem-cells = <&macaddr_factory_e000>;
+};
+
+&switch0 {
+	ports {
+		port@0 {
+			status = "okay";
+			label = "wan";
+			nvmem-cell-names = "mac-address";
+			nvmem-cells = <&macaddr_factory_e006>;
+		};
+
+		port@1 {
+			status = "okay";
+			label = "lan1";
+		};
+
+		port@2 {
+			status = "okay";
+			label = "lan2";
+		};
+
+		port@3 {
+			status = "okay";
+			label = "lan3";
+		};
+
+		port@4 {
+			status = "okay";
+			label = "lan4";
+		};
+	};
+	
+};
+
+&state_default {
+	gpio {
+		groups = "wdt", "jtag";
+		function = "gpio";
+	};
+};

target/linux/ramips/image/mt7621.mk

@@ -366,6 +366,17 @@ define Device/asiarf_ap7621-001
 endef
 TARGET_DEVICES += asiarf_ap7621-001
 
+define Device/asiarf_ap7621-004-v3
+  $(Device/dsa-migration)
+  $(Device/uimage-lzma-loader)
+  DEVICE_VENDOR := AsiaRF
+  DEVICE_MODEL := AP7621-004
+  DEVICE_VARIANT := v3
+  IMAGE_SIZE := 16000k
+  DEVICE_PACKAGES := kmod-mmc-mtk kmod-usb3
+endef
+TARGET_DEVICES += asiarf_ap7621-004-v3
+
 define Device/asiarf_ap7621-nv1
   $(Device/dsa-migration)
   $(Device/uimage-lzma-loader)