ramips: add support for TP-Link Archer C6 v3

The patch adds support for the TP-Link Archer C6 v3 (FCC ID TE7A6V3)
The patch adds identification changes to the existing TP-Link Archer A6,
by Vinay Patil <post2vinay@gmail.com>, which has identical hardware.

Specification
-------------
MediaTek MT7621 SOC
RAM:         128MB DDR3
SPI Flash:   W25Q128 (16MB)
Ethernet:    MT7530 5x 1000Base-T
WiFi 5GHz:   Mediatek MT7613BE
WiFi 2.4GHz: Mediatek MT7603E
UART/Serial: 115200 8n1

Device Configuration & Serial Port Pins
---------------------------------------
ETH Ports:    LAN4 LAN3 LAN2 LAN1 WAN
             _______________________
             |                     |
Serial Pins: |   VCC GND TXD RXD   |
             |_____________________|

LEDs:         Power Wifi2G Wifi5G LAN WAN

Build Output
------------
The build will generate following set of files
[1] openwrt-ramips-mt7621-tplink_archer-c6-v3-initramfs-kernel.bin
[2] openwrt-ramips-mt7621-tplink_archer-c6-v3-squashfs-factory.bin
[3] openwrt-ramips-mt7621-tplink_archer-c6-v3-squashfs-sysupgrade.bin

How to Use - Flashing from TP-Link Web Interface
------------------------------------------------
* Go to "Advanced/System Tools/Firmware Update".
* Click "Browse" and upload the OpenWrt factory image: factory.bin[2]
* Click the "Upgrade" button, and select "Yes" when prompted.

TFTP Booting
------------
Setup a TFTP boot server with address 192.168.0.5.
While starting U-boot press '4' key to stop autoboot.
Copy the initramfs-kernel.bin[1] to TFTP server folder, rename as test.bin
From u-boot command prompt run tftpboot followed by bootm.

Recovery
--------
Archer A6 V3 has recovery page activated if SPI booting from flash fails.
Recovery page can be activated by powercycling the router four times
before the boot process is complete.
Note: TFTP boot can be activated only from u-boot serial console.
Device recovery address: 192.168.0.1

Signed-off-by: Amish Vishwakarma <vishwakarma.amish@gmail.com>
[fix indent]
Signed-off-by: David Bauer <mail@david-bauer.net>

5 files changed, 209 insertions, 180 deletions

diff --git a/target/linux/ramips/dts/mt7621_tplink_archer-a6-v3.dts b/target/linux/ramips/dts/mt7621_tplink_archer-a6-v3.dts
index 46cb365da7..01fea5bde5 100644
--- a/target/linux/ramips/dts/mt7621_tplink_archer-a6-v3.dts
+++ b/target/linux/ramips/dts/mt7621_tplink_archer-a6-v3.dts
@@ -1,188 +1,9 @@
 // SPDX-License-Identifier: GPL-2.0-or-later OR MIT
 
-#include "mt7621.dtsi"
-
-#include <dt-bindings/gpio/gpio.h>
-#include <dt-bindings/input/input.h>
+#include "mt7621_tplink_archer-x6-v3.dtsi"
 
 / {
 	compatible = "tplink,archer-a6-v3", "mediatek,mt7621-soc";
 	model = "TP-Link Archer A6 v3";
 
-	aliases {
-		label-mac-device = &gmac0;
-		led-boot = &led_power;
-		led-failsafe = &led_power;
-		led-running = &led_power;
-		led-upgrade = &led_power;
-	};
-
-	chosen {
-		bootargs = "console=ttyS0,115200n8";
-	};
-
-	keys {
-		compatible = "gpio-keys";
-
-		wps {
-			label = "wps";
-			gpios = <&gpio 28 GPIO_ACTIVE_LOW>;
-			debounce-interval = <60>;
-			linux,code = <KEY_WPS_BUTTON>;
-		};
-
-		reset {
-			label = "reset";
-			gpios = <&gpio 8 GPIO_ACTIVE_LOW>;
-			debounce-interval = <60>;
-			linux,code = <KEY_RESTART>;
-		};
-	};
-
-	leds {
-		compatible = "gpio-leds";
-
-		led_power: power {
-			label = "green:power";
-			gpios = <&gpio 4 GPIO_ACTIVE_LOW>;
-		};
-
-		wan_orange {
-			label = "orange:wan";
-			gpios = <&gpio 14 GPIO_ACTIVE_LOW>;
-		};
-
-		lan {
-			label = "green:lan";
-			gpios = <&gpio 15 GPIO_ACTIVE_LOW>;
-		};
-
-		wifi5g {
-			label = "green:wifi5g";
-			gpios = <&gpio 16 GPIO_ACTIVE_LOW>;
-			linux,default-trigger = "phy1tpt";
-		};
-
-		wifi2g {
-			label = "green:wifi2g";
-			gpios = <&gpio 18 GPIO_ACTIVE_LOW>;
-			linux,default-trigger = "phy0tpt";
-		};
-
-		wan_green {
-			label = "green:wan";
-			gpios = <&gpio 45 GPIO_ACTIVE_LOW>;
-		};
-	};
-};
-
-&spi0 {
-	status = "okay";
-
-	flash@0 {
-		compatible = "jedec,spi-nor";
-		reg = <0>;
-		spi-max-frequency = <40000000>;
-
-		partitions {
-			compatible = "fixed-partitions";
-			#address-cells = <1>;
-			#size-cells = <1>;
-
-			partition@0 {
-				label = "u-boot";
-				reg = <0x0 0x40000>;
-				read-only;
-			};
-
-			partition@40000 {
-				label = "firmware";
-				compatible = "denx,uimage";
-				reg = <0x40000 0xf60000>;
-			};
-
-			config: partition@fa0000 {
-				label = "config";
-				reg = <0xfa0000 0x50000>;
-				read-only;
-			};
-
-			radio: partition@ff0000 {
-				label = "radio";
-				reg = <0xff0000 0x10000>;
-				read-only;
-			};
-		};
-	};
-};
-
-&state_default {
-	gpio {
-		groups =  "i2c", "uart2", "uart3", "jtag", "wdt";
-		function = "gpio";
-	};
-};
-
-&ethernet {
-	pinctrl-names = "default";
-	pinctrl-0 = <&rgmii1_pins &mdio_pins>;
-};
-
-&pcie {
-	status = "okay";
-};
-
-&pcie0 {
-	wifi@0,0 {
-		compatible = "mediatek,mt76";
-		reg = <0x0000 0 0 0 0>;
-		mediatek,mtd-eeprom = <&radio 0x0>;
-		mtd-mac-address = <&config 0x8>;
-		mtd-mac-address-increment = <1>;
-		ieee80211-freq-limit = <2400000 2500000>;
-	};
-};
-
-&pcie1 {
-	wifi@0,0 {
-		compatible = "mediatek,mt76";
-		reg = <0x0000 0 0 0 0>;
-		mediatek,mtd-eeprom = <&radio 0x8000>;
-		mtd-mac-address = <&config 0x8>;
-		mtd-mac-address-increment = <2>;
-		ieee80211-freq-limit = <5000000 6000000>;
-	};
-};
-
-&gmac0 {
-	mtd-mac-address = <&config 0x8>;
-};
-
-&switch0 {
-	ports {
-		port@0 {
-			status = "okay";
-			label = "wan";
-		};
-
-		port@1 {
-			status = "okay";
-			label = "lan1";
-		};
-
-		port@2 {
-			status = "okay";
-			label = "lan2";
-		};
-
-		port@3 {
-			status = "okay";
-			label = "lan3";
-		};
-
-		port@4 {
-			status = "okay";
-			label = "lan4";
-		};
-	};
 };
diff --git a/target/linux/ramips/dts/mt7621_tplink_archer-c6-v3.dts b/target/linux/ramips/dts/mt7621_tplink_archer-c6-v3.dts
new file mode 100644
index 0000000000..07d808ca20
--- /dev/null
+++ b/target/linux/ramips/dts/mt7621_tplink_archer-c6-v3.dts
@@ -0,0 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "mt7621_tplink_archer-x6-v3.dtsi"
+
+/ {
+	compatible = "tplink,archer-c6-v3", "mediatek,mt7621-soc";
+	model = "TP-Link Archer C6 v3";
+
+};
diff --git a/target/linux/ramips/dts/mt7621_tplink_archer-x6-v3.dtsi b/target/linux/ramips/dts/mt7621_tplink_archer-x6-v3.dtsi
new file mode 100644
index 0000000000..76d9908fb9
--- /dev/null
+++ b/target/linux/ramips/dts/mt7621_tplink_archer-x6-v3.dtsi
@@ -0,0 +1,185 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include "mt7621.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	aliases {
+		label-mac-device = &gmac0;
+		led-boot = &led_power;
+		led-failsafe = &led_power;
+		led-running = &led_power;
+		led-upgrade = &led_power;
+	};
+
+	chosen {
+		bootargs = "console=ttyS0,115200n8";
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		wps {
+			label = "wps";
+			gpios = <&gpio 28 GPIO_ACTIVE_LOW>;
+			debounce-interval = <60>;
+			linux,code = <KEY_WPS_BUTTON>;
+		};
+
+		reset {
+			label = "reset";
+			gpios = <&gpio 8 GPIO_ACTIVE_LOW>;
+			debounce-interval = <60>;
+			linux,code = <KEY_RESTART>;
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led_power: power {
+			label = "green:power";
+			gpios = <&gpio 4 GPIO_ACTIVE_LOW>;
+		};
+
+		wan_orange {
+			label = "orange:wan";
+			gpios = <&gpio 14 GPIO_ACTIVE_LOW>;
+		};
+
+		lan {
+			label = "green:lan";
+			gpios = <&gpio 15 GPIO_ACTIVE_LOW>;
+		};
+
+		wifi5g {
+			label = "green:wifi5g";
+			gpios = <&gpio 16 GPIO_ACTIVE_LOW>;
+			linux,default-trigger = "phy1tpt";
+		};
+
+		wifi2g {
+			label = "green:wifi2g";
+			gpios = <&gpio 18 GPIO_ACTIVE_LOW>;
+			linux,default-trigger = "phy0tpt";
+		};
+
+		wan_green {
+			label = "green:wan";
+			gpios = <&gpio 45 GPIO_ACTIVE_LOW>;
+		};
+	};
+};
+
+&spi0 {
+	status = "okay";
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <40000000>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "u-boot";
+				reg = <0x0 0x40000>;
+				read-only;
+			};
+
+			partition@40000 {
+				label = "firmware";
+				compatible = "denx,uimage";
+				reg = <0x40000 0xf60000>;
+			};
+
+			config: partition@fa0000 {
+				label = "config";
+				reg = <0xfa0000 0x50000>;
+				read-only;
+			};
+
+			radio: partition@ff0000 {
+				label = "radio";
+				reg = <0xff0000 0x10000>;
+				read-only;
+			};
+		};
+	};
+};
+
+&state_default {
+	gpio {
+		groups =  "i2c", "uart2", "uart3", "jtag", "wdt";
+		function = "gpio";
+	};
+};
+
+&ethernet {
+	pinctrl-names = "default";
+	pinctrl-0 = <&rgmii1_pins &mdio_pins>;
+};
+
+&pcie {
+	status = "okay";
+};
+
+&pcie0 {
+	wifi@0,0 {
+		compatible = "mediatek,mt76";
+		reg = <0x0000 0 0 0 0>;
+		mediatek,mtd-eeprom = <&radio 0x0>;
+		mtd-mac-address = <&config 0x8>;
+		mtd-mac-address-increment = <1>;
+		ieee80211-freq-limit = <2400000 2500000>;
+	};
+};
+
+&pcie1 {
+	wifi@0,0 {
+		compatible = "mediatek,mt76";
+		reg = <0x0000 0 0 0 0>;
+		mediatek,mtd-eeprom = <&radio 0x8000>;
+		mtd-mac-address = <&config 0x8>;
+		mtd-mac-address-increment = <2>;
+		ieee80211-freq-limit = <5000000 6000000>;
+	};
+};
+
+&gmac0 {
+	mtd-mac-address = <&config 0x8>;
+};
+
+&switch0 {
+	ports {
+		port@0 {
+			status = "okay";
+			label = "wan";
+		};
+
+		port@1 {
+			status = "okay";
+			label = "lan1";
+		};
+
+		port@2 {
+			status = "okay";
+			label = "lan2";
+		};
+
+		port@3 {
+			status = "okay";
+			label = "lan3";
+		};
+
+		port@4 {
+			status = "okay";
+			label = "lan4";
+		};
+	};
+};
diff --git a/target/linux/ramips/image/mt7621.mk b/target/linux/ramips/image/mt7621.mk
index efeac698b1..ee5ebaa8b2 100644
--- a/target/linux/ramips/image/mt7621.mk
+++ b/target/linux/ramips/image/mt7621.mk
@@ -1244,6 +1244,19 @@ define Device/tplink_archer-a6-v3
 endef
 TARGET_DEVICES += tplink_archer-a6-v3
 
+define Device/tplink_archer-c6-v3
+  $(Device/dsa-migration)
+  $(Device/tplink-safeloader)
+  DEVICE_MODEL := Archer C6
+  DEVICE_VARIANT := V3
+  DEVICE_PACKAGES := kmod-mt7603 kmod-mt7615e \
+	kmod-mt7663-firmware-ap kmod-mt7663-firmware-sta
+  TPLINK_BOARD_ID := ARCHER-C6-V3
+  KERNEL := $(KERNEL_DTB) | uImage lzma
+  IMAGE_SIZE := 15744k
+endef
+TARGET_DEVICES += tplink_archer-c6-v3
+
 define Device/tplink_archer-c6u-v1
   $(Device/dsa-migration)
   $(Device/tplink-safeloader)
diff --git a/target/linux/ramips/mt7621/base-files/etc/board.d/01_leds b/target/linux/ramips/mt7621/base-files/etc/board.d/01_leds
index 5322bc9db0..c04dae4f0d 100644
--- a/target/linux/ramips/mt7621/base-files/etc/board.d/01_leds
+++ b/target/linux/ramips/mt7621/base-files/etc/board.d/01_leds
@@ -90,6 +90,7 @@ netgear,r6800)
 	ucidef_set_led_netdev "lan4" "LAN4" "white:lan4" "lan4"
 	;;
 tplink,archer-a6-v3|\
+tplink,archer-c6-v3|\
 tplink,archer-c6u-v1)
 	ucidef_set_led_netdev "lan" "LAN" "green:lan" "br-lan"
 	ucidef_set_led_netdev "wan" "WAN" "green:wan" "wan"