ramips: mt7621: add Mediatek AP-MT7621A-V60 EVB support

This board has:
- mt7621 SoC
- 8MB SPI flash
- 128MB RAM
- 5x ethernet ports from internal (SoC) switch
- 1x ethernet port sitting on gmac2 and IC+ phy (not yet supported)
- 3x PCIe slots
- 1x USB 2.0 and 1x USB 3.0
- sound based on wm8960
- SDXC card slot (full size)

First fw write from interactive u-boot menu, interrupt with 2.
After that sysupgrade.

Tested both with 4.9 and 4.14

Signed-off-by: Roman Yeryomin <roman@advem.lv>

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

@@ -73,6 +73,7 @@ ramips_setup_interfaces()
 	3g-6200n|\
 	ai-br100|\
 	alfa-network,ac1200rm|\
+	mediatek,ap-mt7621a-v60|\
 	d240|\
 	db-wrt01|\
 	dir-300-b7|\

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

@@ -23,6 +23,7 @@ platform_check_image() {
 	all0256n-8M|\
 	all5002|\
 	all5003|\
+	mediatek,ap-mt7621a-v60|\
 	ar725w|\
 	asl26555-8M|\
 	asl26555-16M|\

target/linux/ramips/dts/AP-MT7621A-V60.dts

+/dts-v1/;
+
+#include "mt7621.dtsi"
+
+/ {
+	compatible = "mediatek,ap-mt7621a-v60", "mediatek,mt7621-soc";
+	model = "Mediatek AP-MT7621A-V60 EVB";
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x0 0x8000000>;
+	};
+
+	chosen {
+		bootargs = "console=ttyS0,57600";
+	};
+
+	sound {
+		compatible = "simple-audio-card";
+		simple-audio-card,name = "Audio-I2S";
+		simple-audio-card,format = "i2s";
+		simple-audio-card,bitclock-master = <&dailink0_master>;
+		simple-audio-card,frame-master = <&dailink0_master>;
+		simple-audio-card,widgets = 
+			"Microphone", "Microphone Jack",
+			"Headphone", "Headphone Jack";
+		simple-audio-card,routing =
+			"LINPUT1", "Microphone Jack",
+			"RINPUT1", "Microphone Jack",
+			"Headphone Jack", "HP_L",
+			"Headphone Jack", "HP_R";
+		simple-audio-card,mclk-fs = <256>;
+
+		simple-audio-card,cpu {
+			sound-dai = <&i2s>;
+		};
+
+		dailink0_master: simple-audio-card,codec {
+			sound-dai = <&codec>;
+		};
+	};
+};
+
+&pinctrl {
+	state_default: pinctrl0 {
+		gpio {
+			ralink,group = "uart2", "rgmii2";
+			ralink,function = "gpio";
+		};
+	};
+	i2s_pins: i2s {
+		i2s {
+			ralink,group = "uart3";
+			ralink,function = "i2s";
+		};
+	};
+};
+
+&i2c {
+	status = "okay";
+
+	codec: wm8960@1a {
+		#sound-dai-cells = <0>;
+		compatible = "wlf,wm8960";
+		reg = <0x1a>;
+		wlf,shared-lrclk;
+	};
+};
+
+&gdma {
+	status = "okay";
+};
+
+&i2s {
+	#sound-dai-cells = <0>;
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2s_pins>;
+};
+
+&spi0 {
+	status = "okay";
+
+	mx25l6405d@0 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "mx25l6405d","jedec,spi-nor";
+		reg = <0 0>;
+		spi-max-frequency = <10000000>;
+		m25p,chunked-io = <32>;
+
+		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 0x7b0000>;
+		};
+	};
+};
+
+&sdhci {
+	status = "okay";
+};
+
+&ethernet {
+	mtd-mac-address = <&factory 0x5>;
+};
+
+&pcie {
+	status = "okay";
+};

target/linux/ramips/image/mt7621.mk

@@ -57,6 +57,14 @@ define Device/dir-860l-b1
 endef
 TARGET_DEVICES += dir-860l-b1
 
+define Device/mediatek_ap-mt7621a-v60
+  DTS := AP-MT7621A-V60
+  IMAGE_SIZE := $(ralink_default_fw_size_8M)
+  DEVICE_TITLE := Mediatek AP-MT7621A-V60 EVB
+  DEVICE_PACKAGES := kmod-usb3 kmod-sdhci-mt7620 kmod-sound-mt7620
+endef
+TARGET_DEVICES += mediatek_ap-mt7621a-v60
+
 define Device/ew1200
   DTS := EW1200
   IMAGE_SIZE := $(ralink_default_fw_size_16M)