ramips: add support for Kimax U25AWF-H1

Kimax U-25AWF-H1 is is a 2,5" HDD Enclosure with Wi-Fi/Eth conection
and battery, based on MediaTek MT7620A.

Patch rewritten from: https://forum.openwrt.org/viewtopic.php?pid=305643

Specification:

- MT7620A CPU
- 64 MB of RAM
- 16 MB of FLASH
- 802.11bgn WiFi
- 1x 10/100 Mbps Ethernet
- USB 2.0 Host
- UART for serial console

Flash instruction:
1. Download lede-ramips-mt7620-u25awf-h1-squashfs-sysupgrade.bin
2. Open webinterface a upgrade
3. After boot connect via ethernet to ip 192.168.1.1

Signed-off-by: Daniel Kucera <daniel.kucera@gmail.com>
[fix reset button gpio, don't add a lan/wan vlan config for single
port board, add -H1 suffix do make sure that this revision of the
board is supported/tested]
Signed-off-by: Mathias Kresin <dev@kresin.me>

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

@@ -368,6 +368,10 @@ tl-wr841n-v13)
 	ucidef_set_led_switch "lan4" "lan4" "$board:green:lan4" "switch0" "0x10"
 	ucidef_set_led_switch "wan" "wan" "$board:green:wan" "switch0" "0x01"
 	;;
+u25awf-h1)
+	set_wifi_led "u25awf:red:wifi"
+	ucidef_set_led_netdev "eth" "eth" "u25awf:green:lan" "eth0"
+	;;
 vocore-8M|\
 vocore-16M)
 	ucidef_set_led_netdev "eth" "ETH" "vocore:orange:eth" "eth0"

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

@@ -237,6 +237,7 @@ ramips_setup_interfaces()
 	mzk-ex750np|\
 	na930|\
 	pbr-d1|\
+	u25awf-h1|\
 	wli-tx4-ag300n|\
 	wmdr-143n|\
 	wmr-300|\

target/linux/ramips/base-files/etc/diag.sh

@@ -238,6 +238,9 @@ get_status_led() {
 	sap-g3200u3)
 		status_led="$board:green:usb"
 		;;
+	u25awf-h1)
+		status_led="u25awf:red:wifi"
+		;;
 	v22rw-2x2)
 		status_led="$board:green:security"
 		;;

target/linux/ramips/base-files/lib/ramips.sh

@@ -505,6 +505,9 @@ ramips_board_detect() {
 	*"TL-WR841N v13")
 		name="tl-wr841n-v13"
 		;;
+	*"U25AWF-H1")
+		name="u25awf-h1"
+		;;
 	*"UBNT-ERX")
 		name="ubnt-erx"
 		;;

target/linux/ramips/base-files/lib/upgrade/platform.sh

@@ -144,6 +144,7 @@ platform_check_image() {
 	tew-714tru|\
 	timecloud|\
 	tiny-ac|\
+	u25awf-h1|\
 	ur-326n4g|\
 	ur-336un|\
 	v22rw-2x2|\

target/linux/ramips/dts/U25AWF-H1.dts

@@ -0,0 +1,106 @@
+/dts-v1/;
+
+#include "mt7620a.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/{
+	compatible = "kimax,u25awf-h1","ralink,mt7620a-soc";
+	model = "Kimax U25AWF-H1";
+
+	gpio-keys-polled {
+		compatible = "gpio-keys-polled";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		poll-interval = <20>;
+
+		reset {
+			label = "reset";
+			gpios = <&gpio0 13 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+	};
+
+	gpio-leds {
+		compatible = "gpio-leds";
+
+		wifi {
+			label = "u25awf:red:wifi";
+			gpios = <&gpio3 0 GPIO_ACTIVE_LOW>;
+		};
+
+		lan {
+			label = "u25awf:green:lan";
+			gpios = <&gpio2 4 GPIO_ACTIVE_LOW>;
+		};
+	};
+};
+
+&gpio2 {
+	status = "okay";
+};
+
+&gpio3 {
+	status = "okay";
+};
+
+&spi0 {
+	status = "okay";
+
+	m25p80@0 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <10000000>;
+
+		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 {
+			label = "firmware";
+			reg = <0x50000 0xfb0000>;
+		};
+	};
+};
+
+&ehci {
+	status = "okay";
+};
+
+&ohci {
+	status = "okay";
+};
+
+&ethernet {
+	mtd-mac-address = <&factory 0x4>;
+};
+
+&wmac {
+	ralink,mtd-eeprom = <&factory 0>;
+};
+
+&pinctrl {
+	state_default: pinctrl0 {
+		default {
+			ralink,group = "uartf", "ephy", "wled";
+			ralink,function = "gpio";
+		};
+	};
+};

target/linux/ramips/image/mt7620.mk

@@ -193,6 +193,13 @@ define Device/gl-mt300a
 endef
 TARGET_DEVICES += gl-mt300a
 
+define Device/u25awf-h1
+  DTS := U25AWF-H1
+  IMAGE_SIZE := 16064k
+  DEVICE_TITLE := Kimax U25AWF-H1
+endef
+TARGET_DEVICES += u25awf-h1
+
 define Device/gl-mt300n
   DTS := GL-MT300N
   IMAGE_SIZE := $(ralink_default_fw_size_16M)