ramips: add support for Lava LR-25G001

The Lava LR-25G001 Wireless Router is based on the MT7620A SoC.

Specification:

- MediaTek MT7620A (580 Mhz)
- 64 MB of RAM
- 16 MB of FLASH
- 1x 802.11bgn radio
- 1x 802.11ac radio (MT7610EN)
- 5x 10/100/1000 Mbps AR8337 Switch (1 WAN AND 4 LAN)
- 2x external, detachable antennas
- 1x USB 2.0
- UART (J3) header on PCB (57600 8n1)
- 8x LED (3x GPIO-controlled), 2x button
- JBOOT bootloader

Known issues:
- Work only three Gigabit ports (3/5, 1 WAN and 2LAN)

Installation:
Apply factory image via http web-gui or JBOOT recovery page

How to revert to OEM firmware:
- push the reset button and turn on the power. Wait until LED start
  blinking (~10sec.)
- upload original factory image via JBOOT http (IP: 192.168.123.254)

Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>

1 files changed, 182 insertions, 0 deletions

diff --git a/target/linux/ramips/dts/LR-25G001.dts b/target/linux/ramips/dts/LR-25G001.dts
new file mode 100644
index 0000000000..a89a6e57fb
--- /dev/null
+++ b/target/linux/ramips/dts/LR-25G001.dts
@@ -0,0 +1,182 @@
+/dts-v1/;
+
+#include "mt7620a.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	compatible = "lava,lr-25g001", "ralink,mt7620a-soc";
+	model = "LAVA LR-25G001";
+
+	aliases {
+		led-boot = &led_status;
+		led-failsafe = &led_status;
+		led-running = &led_status;
+		led-upgrade = &led_status;
+	};
+
+	gpio-keys-polled {
+		compatible = "gpio-keys-polled";
+		poll-interval = <20>;
+
+		wps {
+			label = "wps";
+			gpios = <&gpio0 2 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_WPS_BUTTON>;
+		};
+
+		reset {
+			label = "reset";
+			gpios = <&gpio0 1 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+	};
+
+	gpio-leds {
+		compatible = "gpio-leds";
+
+		led_status: status {
+			label = "lava,lr-25g001:green:status";
+			gpios = <&gpio0 14 GPIO_ACTIVE_LOW>;
+		};
+
+		wifi2g {
+			label = "lava,lr-25g001:green:wifi2g";
+			gpios = <&gpio0 11 GPIO_ACTIVE_LOW>;
+		};
+
+		wifi5g {
+			label = "lava,lr-25g001:green:wifi5g";
+			gpios = <&gpio0 13 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	gpio_export {
+		compatible = "gpio-export";
+		#size-cells = <0>;
+
+		usbpower {
+			gpio-export,name = "usbpower";
+			gpio-export,output = <1>;
+			gpios = <&gpio0 12 GPIO_ACTIVE_HIGH>;
+		};
+	};
+};
+
+&gpio0 {
+	status = "okay";
+};
+
+&spi0 {
+	status = "okay";
+
+	mx25l12805d@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <10000000>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "jboot";
+				reg = <0x0 0x10000>;
+				read-only;
+			};
+
+			partition@10000 {
+				label = "firmware";
+				reg = <0x10000 0xfe0000>;
+			};
+
+			config: partition@ff0000 {
+				label = "config";
+				reg = <0xff0000 0x10000>;
+				read-only;
+			};
+		};
+	};
+};
+
+&ehci {
+	status = "okay";
+};
+
+&ohci {
+	status = "okay";
+};
+
+&ethernet {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&rgmii1_pins &rgmii2_pins &mdio_pins>;
+
+	port@5 {
+		status = "okay";
+		phy-mode = "rgmii";
+		mediatek,fixed-link = <1000 1 1 1>;
+	};
+
+	mdio-bus {
+		status = "okay";
+		mediatek,mdio-mode = <1>;
+
+		phy0: ethernet-phy@0 {
+			reg = <0>;
+			phy-mode = "rgmii";
+			qca,ar8327-initvals = <
+				0x04 0x87300000 /* PORT0 PAD MODE CTRL */
+				0x0c 0x00000000 /* PORT6 PAD MODE CTRL */
+				0x7c 0x0000007e /* PORT0_STATUS */
+				0x94 0x00000000 /* PORT6_STATUS */
+
+			>;
+		};
+
+		phy1: ethernet-phy@1 {
+			reg = <1>;
+			phy-mode = "rgmii";
+		};
+
+		phy2: ethernet-phy@2 {
+			reg = <2>;
+			phy-mode = "rgmii";
+		};
+
+		phy3: ethernet-phy@3 {
+			reg = <3>;
+			phy-mode = "rgmii";
+		};
+
+		phy4: ethernet-phy@4 {
+			reg = <4>;
+			phy-mode = "rgmii";
+		};
+
+	};
+};
+
+&pcie {
+	status = "okay";
+};
+
+&pcie0 {
+	mt76x0e@0,0 {
+		reg = <0x0000 0 0 0 0>;
+		mtd-mac-address = <&config 0xe07e>;
+		mtd-mac-address-increment = <(2)>;
+		mediatek,mtd-eeprom = <&config 0xe08a>;
+	};
+};
+
+&pinctrl {
+	state_default: pinctrl0 {
+		gpio {
+			ralink,group = "uartf", "i2c";
+			ralink,function = "gpio";
+		};
+	};
+};