ramips: add support for Netgear R6120

This patch adds support for the Netgear R6120, aka Netgear AC1200.

Specification:
- SoC: MediaTek MT7628 (580 MHz)
- Flash: 16 MiB
- RAM: 64 MiB
- Wireless: 2.4Ghz(builtin) and 5Ghz (MT7612E)
- LAN speed: 10/100
- LAN ports: 4
- WAN speed: 10/100
- WAN ports: 1
- Serial baud rate of Bootloader and factory firmware: 57600

To flash use nmrpflash with the provided factory.img.
Flashing via webinterface will not work, for now.

Signed-off-by: Ludwig Thomeczek <ledesrc@wxorx.net>

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

@@ -319,6 +319,11 @@ mzk-ex750np)
 na930)
 	set_usb_led "$boardname:blue:status"
 	;;
+netgear,r6120)
+	ucidef_set_led_switch "lan" "lan" "$boardname:green:lan" "switch0" "0x0f"
+	ucidef_set_led_wlan "wlan2g" "WiFi 2.4GHz" "$boardname:green:wlan2g" "phy0tpt"
+	ucidef_set_led_wlan "wlan5g" "WiFi 5GHz" "$boardname:green:wlan5g" "phy1tpt"
+	;;
 newifi-d1)
 	set_usb_led "$boardname:red:status"
 	;;

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

@@ -103,6 +103,7 @@ ramips_setup_interfaces()
 	mzk-750dhp|\
 	mzk-w300nh2|\
 	d-team,newifi-d2|\
+	netgear,r6120|\
 	nixcore-x1-8M|\
 	nixcore-x1-16M|\
 	oy-0001|\

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

@@ -132,6 +132,7 @@ platform_check_image() {
 	psr-680w|\
 	px-4885-4M|\
 	px-4885-8M|\
+	netgear,r6120|\
 	rb750gr3|\
 	re6500|\
 	rp-n53|\

target/linux/ramips/dts/R6120.dts

@@ -0,0 +1,145 @@
+/dts-v1/;
+
+#include "mt7628an.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	compatible = "netgear,r6120", "mediatek,mt7628an-soc";
+	model = "Netgear AC1200 R6120";
+
+	aliases {
+		led-status = &led_power;
+	};
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x0 0x4000000>;
+	};
+
+	gpio-keys-polled {
+		compatible = "gpio-keys-polled";
+		poll-interval = <20>;
+
+		reset {
+			label = "reset";
+			gpios = <&gpio1 6 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+	};
+
+	gpio-leds {
+		compatible = "gpio-leds";
+
+		lan {
+			label = "r6120:green:lan";
+			gpios = <&gpio1 12 GPIO_ACTIVE_LOW>;
+		};
+
+		led_power: power {
+			label = "r6120:green:power";
+			gpios = <&gpio1 11 GPIO_ACTIVE_LOW>;
+		};
+
+		wlan {
+			label = "r6120:green:wlan2g";
+			gpios = <&gpio1 10 GPIO_ACTIVE_LOW>;
+		};
+
+		wlan_orange {
+			label = "r6120:orange:wlan2g";
+			gpios = <&gpio1 9 GPIO_ACTIVE_LOW>;
+		};
+
+		wlan5 {
+			label = "r6120:green:wlan5g";
+			gpios = <&gpio1 8 GPIO_ACTIVE_LOW>;
+		};
+
+		wlan5_orange {
+			label = "r6120:orange:wlan5g";
+			gpios = <&gpio1 7 GPIO_ACTIVE_LOW>;
+		};
+	};
+};
+
+&pinctrl {
+	state_default: pinctrl0 {
+		gpio {
+			ralink,group = "p0led_an", "p1led_an", "p2led_an",
+				       "p3led_an", "p4led_an", "wdt", "wled_an";
+			ralink,function = "gpio";
+		};
+	};
+};
+
+&spi0 {
+	status = "okay";
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <10000000>;
+		m25p,chunked-io = <32>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "u-boot";
+				reg = <0x0 0x40000>;
+				read-only;
+			};
+
+			factory: partition@40000 {
+				label = "factory";
+				reg = <0x40000 0x20000>;
+				read-only;
+			};
+
+			nvram: partition@60000 {
+				label = "nvram";
+				reg = <0x60000 0x30000>;
+				read-only;
+			};
+
+			partition@90000 {
+				label = "firmware";
+				reg = <0x90000 0xf60000>;
+			};
+
+			partition@ff0000 {
+				label = "reserved";
+				reg = <0xff0000 0x10000>;
+				read-only;
+			};
+		};
+	};
+};
+
+&wmac {
+	status = "okay";
+	mtd-mac-address = <&nvram 0x100b0>;
+	mediatek,mtd-eeprom = <&factory 0x20000>;
+};
+
+&ethernet {
+	mtd-mac-address = <&nvram 0x100b0>;
+};
+
+&pcie {
+	status = "okay";
+};
+
+&pcie0 {
+	wifi@0,0 {
+		reg = <0x0000 0 0 0 0>;
+		mediatek,mtd-eeprom = <&factory 0x28000>;
+		ieee80211-freq-limit = <5000000 6000000>;
+		mtd-mac-address = <&nvram 0x100b0>;
+		mtd-mac-address-increment = <(2)>;
+	};
+};

target/linux/ramips/image/mt76x8.mk

@@ -2,6 +2,17 @@
 # MT76x8 Profiles
 #
 
+DEVICE_VARS += SERCOMM_KERNEL_OFFSET SERCOMM_HWID SERCOMM_HWVER SERCOMM_SWVER
+
+define Build/mksercommfw
+	$(STAGING_DIR_HOST)/bin/mksercommfw \
+		$@ \
+		$(SERCOMM_KERNEL_OFFSET) \
+		$(SERCOMM_HWID) \
+		$(SERCOMM_HWVER) \
+		$(SERCOMM_SWVER)
+endef
+
 define Device/tplink
   TPLINK_FLASHLAYOUT :=
   TPLINK_HWID :=
@@ -91,6 +102,23 @@ define Device/mt7628
 endef
 TARGET_DEVICES += mt7628
 
+define Device/netgear_r6120
+  DTS := R6120
+  BLOCKSIZE := 64k
+  IMAGE_SIZE := $(ralink_default_fw_size_16M)
+  DEVICE_TITLE := Netgear AC1200 R6120
+  DEVICE_PACKAGES := kmod-usb2 kmod-usb-ohci
+  SERCOMM_KERNEL_OFFSET := 90000
+  SERCOMM_HWID := CGQ
+  SERCOMM_HWVER := A001
+  SERCOMM_SWVER := 0040
+  IMAGES += factory.img
+  IMAGE/default := append-kernel | pad-to $$$$(BLOCKSIZE)| append-rootfs | pad-rootfs
+  IMAGE/sysupgrade.bin := $$(IMAGE/default) | append-metadata | check-size $$$$(IMAGE_SIZE)
+  IMAGE/factory.img := $$(IMAGE/default) | mksercommfw
+endef
+TARGET_DEVICES += netgear_r6120
+
 define Device/omega2
   DTS := OMEGA2
   IMAGE_SIZE := $(ralink_default_fw_size_16M)