ramips: mt7620: add support for Dlink DAP-1620-A2

Add support for DAP-1620 Revision A hardware. The original firmware has dual image, one primary and another for recovery. This version supports using only single image due to size limitations. Recovery and restore can be done using the U-Boot menu on device startup (serial port) and writing the image using option 2. Full backup of the Nand is recommended before installing in case the original partitions are to be restored in future. Full details will be updated in device wiki page.

Signed-off-by: Senthil Durairaj <101510626+sendurai@users.noreply.github.com>

target/linux/ramips/dts/mt7620a_dlink_dap-1620-a2.dts

@@ -0,0 +1,205 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "mt7620a.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/leds/common.h>
+
+/ {
+	compatible = "dlink,dap-1620-a2", "ralink,mt7620a-soc";
+	model = "D-Link DAP-1620 A2";
+
+	aliases {
+		led-boot = &led_status_red;
+		led-failsafe = &led_status_green;
+		led-running = &led_status_green;
+		led-upgrade = &led_status_red;
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "reset";
+			gpios = <&gpio0 1 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+			debounce-interval = <60>;
+		};
+
+		wps {
+			label = "wps";
+			gpios = <&gpio0 2 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_WPS_BUTTON>;
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led_status_red: status_red {
+			function = LED_FUNCTION_STATUS;
+			color = <LED_COLOR_ID_RED>;
+			gpios = <&gpio0 9 GPIO_ACTIVE_LOW>;
+		};
+
+		led_status_green: status_green {
+			function = LED_FUNCTION_STATUS;
+			color = <LED_COLOR_ID_GREEN>;
+			gpios = <&gpio0 10 GPIO_ACTIVE_LOW>;
+		};
+
+		rssi_low_red {
+			label = "red:rssilow";
+			color = <LED_COLOR_ID_RED>;
+			gpios = <&gpio0 13 GPIO_ACTIVE_LOW>;
+		};
+
+		rssi_low_green {
+			label = "green:rssilow";
+			color = <LED_COLOR_ID_GREEN>;
+			gpios = <&gpio0 12 GPIO_ACTIVE_LOW>;
+		};
+
+		rssi_med_green {
+			label = "green:rssimed";
+			color = <LED_COLOR_ID_GREEN>;
+			gpios = <&gpio0 8 GPIO_ACTIVE_LOW>;
+		};
+
+		rssi_high_green {
+			label = "green:rssihigh";
+			color = <LED_COLOR_ID_GREEN>;
+			gpios = <&gpio0 11 GPIO_ACTIVE_LOW>;
+		};
+	};
+};
+
+&spi0 {
+	status = "okay";
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <50000000>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "u-boot";
+				reg = <0x0 0x30000>;
+				read-only;
+			};
+
+			partition@30000 {
+				label = "nvram";
+				reg = <0x30000 0x10000>;
+			};
+
+			partition@40000 {
+				label = "factory";
+				reg = <0x40000 0x10000>;
+				read-only;
+
+				nvmem-layout {
+					compatible = "fixed-layout";
+					#address-cells = <1>;
+					#size-cells = <1>;
+
+					eeprom_factory_0: eeprom@0 {
+						reg = <0x0 0x200>;
+					};
+
+					eeprom_factory_8000: eeprom@8000 {
+						reg = <0x8000 0x200>;
+					};
+
+					macaddr_factory_ffd4: macaddr@ffd4 {
+						compatible = "mac-base";
+						reg = <0xffd4 0x11>;
+						#nvmem-cell-cells = <1>;
+					};
+
+					macaddr_factory_ffe8: macaddr@ffe8 {
+						compatible = "mac-base";
+						reg = <0xffe8 0x11>;
+						#nvmem-cell-cells = <1>;
+					};
+				};
+			};
+
+			partition@50000 {
+				compatible = "denx,uimage";
+				label = "firmware";
+				reg = <0x50000 0x7b0000>;
+			};
+		};
+	};
+};
+
+&state_default {
+	gpio {
+		groups = "i2c", "uartf", "nd_sd";
+		function = "gpio";
+	};
+};
+
+&ethernet {
+	pinctrl-names = "default";
+	pinctrl-0 = <&rgmii1_pins &rgmii2_pins &mdio_pins>;
+
+	nvmem-cells = <&macaddr_factory_ffe8 0>;
+	nvmem-cell-names = "mac-address";
+
+	mediatek,portmap = "wllll";
+
+	port@5 {
+		status = "okay";
+		mediatek,fixed-link = <1000 1 1 1>;
+		phy-mode = "rgmii";
+	};
+
+	mdio-bus {
+		status = "okay";
+
+		phy0: ethernet-phy@0 {
+			reg = <0>;
+			phy-mode = "rgmii";
+		};
+
+		phy1: ethernet-phy@1 {
+			reg = <1>;
+			phy-mode = "rgmii";
+		};
+
+		phy1f: ethernet-phy@1f {
+			reg = <0x1f>;
+			phy-mode = "rgmii";
+		};
+	};
+};
+
+&gsw {
+	mediatek,ephy-base = /bits/ 8 <12>;
+};
+
+&wmac {
+	nvmem-cells = <&eeprom_factory_0>, <&macaddr_factory_ffd4 0>;
+	nvmem-cell-names = "eeprom", "mac-address";
+};
+
+&pcie {
+	status = "okay";
+};
+
+&pcie0 {
+	wifi@0,0 {
+		reg = <0x0000 0 0 0 0>;
+		nvmem-cells = <&eeprom_factory_8000>, <&macaddr_factory_ffd4 0>;
+		nvmem-cell-names = "eeprom", "mac-address";
+		ieee80211-freq-limit = <5000000 6000000>;
+	};
+};

target/linux/ramips/image/mt7620.mk

@@ -207,6 +207,16 @@ define Device/comfast_cf-wr800n
 endef
 TARGET_DEVICES += comfast_cf-wr800n
 
+define Device/dlink_dap-1620-a2
+  DEVICE_VENDOR := D-Link
+  DEVICE_MODEL := DAP-1620
+  IMAGE_SIZE := 7872k
+  DEVICE_VARIANT := A2
+  SOC := mt7620a
+  DEVICE_PACKAGES := kmod-mt76x0e kmod-mt76x2 rssileds
+endef
+TARGET_DEVICES += dlink_dap-1620-a2
+
 define Device/dlink_dch-m225
   $(Device/seama)
   SOC := mt7620a

target/linux/ramips/mt7620/base-files/etc/board.d/01_leds

@@ -49,6 +49,13 @@ comfast,cf-wr800n)
 	ucidef_set_led_netdev "lan" "lan" "white:ethernet" eth0.1
 	ucidef_set_led_netdev "wifi_led" "wifi" "white:wifi" "wlan0"
 	;;
+dlink,dap-1620-a2)
+	ucidef_set_rssimon "wlan1" "200000" "1"
+	ucidef_set_led_rssi "rssilow" "rssilow" "red:rssilow" "wlan1" "1" "40"
+	ucidef_set_led_rssi "rssimediumlow" "rssimediumlow" "green:rssilow" "wlan1" "41" "100"
+	ucidef_set_led_rssi "rssimediumhigh" "rssimediumhigh" "green:rssimed" "wlan1" "61" "100"
+	ucidef_set_led_rssi "rssihigh" "rssihigh" "green:rssihigh" "wlan1" "81" "100"
+	;;	
 dlink,dir-806a-b1)
 	ucidef_set_led_netdev "wifi_led" "2.4g" "green:wlan" "phy1-ap0"
 	;;

target/linux/ramips/mt7620/base-files/etc/board.d/02_network

@@ -111,6 +111,10 @@ ramips_setup_interfaces()
 		ucidef_add_switch "switch0" \
 			"4:lan" "6@eth0"
 		;;
+	dlink,dap-1620-a2)
+		ucidef_add_switch "switch0" \
+			"5:lan" "6@eth0"
+		;;	
 	dlink,dir-510l)
 		ucidef_add_switch "switch0" \
 			"0:lan" "6@eth0"