ath79: add support for TP-Link Archer C6 v2 (US) and A6 (US/TW)

This patch is based on #1689 and adds support for TP-Link Archer
C6 v2 (US) and A6 (US/TW).

The hardware is the same as EU and RU variant, except for GPIOs
(LEDS/Buttons), flash(chip/partitions) and UART being available
on the board.

- SOC: Qualcomm QCA9563 @ 775MHz
- Flash: GigaDevice GD25Q127CS1G (16MiB)
- RAM: Zentel A3R1GE40JBF (128 MiB DDR2)
- Ethernet: Qualcomm QCA8337N: 4x 1Gbps LAN + 1x 1Gbps WAN
- Wireless:
  - 2.4GHz (bgn) QCA9563 integrated (3x3)
  - 5GHz (ac) Qualcomm QCA9886 (2x2)
- Button: 1x power, 1x reset, 1x wps
- LED: 6x LEDs: power, wlan2g, wlan5g, lan, wan, wps
- UART: 115200, 8n1 (header available on board)

Known issues:
 - Wireless: 5GHz is known to have lower RSSI signal, it affects speed and range.

Flash instructions:

Upload openwrt-ath79-generic-tplink_archer-c6-v2-us-squashfs-factory.bin
via the router Web interface.

Flash instruction using tftp recovery:

1. Connect the computer to one of the LAN ports of the router
2. Set the computer IP to 192.168.0.66
3. Start a tftp server with the OpenWrt factory image in the
   tftp root directory renamed to ArcherA6v2_tp_recovery.bin.
4. Connect power cable to router, press and hold the
   reset button and turn the router on
5. Keep the reset button pressed until the WPS LED lights up
6. Wait ~150 seconds to complete flashing

Flash partitioning: I've followed #1689 for defining the partition layout
for this patch. The partition named as "tplink" @ 0xfd0000 is marked
as read only as it is where some config for stock firmware are stored.
On stock firmware those stock partitions starts at 0xfd9400 however
I had not been able to make it functional starting on the same address as
on stock fw, so it has been partitioned following #1689 and not the stock
partition layout for this specific partition. Due to that firmware/rootfs
partition lenght is 0xf80000 and not 0xf89400 as stock.

According to the GPL code, the EU/RU/JP variant does have different GPIO pins
assignment to LEDs and buttons, also the flash memory layout is different.

GPL Source Code: https://static.tp-link.com/resources/gpl/gpl-A6v2_us.tar.gz

Signed-off-by: Anderson Vulczak <andi@andi.com.br>
[wrap commit message, remove soft_ver change for C6 v2 EU, move LED aliases
to DTS files, remove dts-v1 in DTSI, node/property reorder in DTSI]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

1 files changed, 4 insertions, 116 deletions

diff --git a/target/linux/ath79/dts/qca9563_tplink_archer-x6-v2.dtsi b/target/linux/ath79/dts/qca9563_tplink_archer-x6-v2.dtsi
index f1a1f5673d..367f826b9d 100644
--- a/target/linux/ath79/dts/qca9563_tplink_archer-x6-v2.dtsi
+++ b/target/linux/ath79/dts/qca9563_tplink_archer-x6-v2.dtsi
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0-or-later OR MIT
-/dts-v1/;
 
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/input/input.h>
@@ -7,76 +6,12 @@
 #include "qca956x.dtsi"
 
 / {
-	chosen {
-		bootargs = "console=ttyS0,115200n8";
-	};
-
 	aliases {
-		led-boot = &led_power;
-		led-failsafe = &led_power;
-		led-running = &led_power;
-		led-upgrade = &led_power;
 		label-mac-device = &eth0;
 	};
 
-	leds {
-		compatible = "gpio-leds";
-
-		led_power: power {
-			label = "tp-link:green:power";
-			gpios = <&gpio 17 GPIO_ACTIVE_LOW>;
-			default-state = "on";
-		};
-
-		wlan2g {
-			label = "tp-link:green:wlan2g";
-			gpios = <&gpio 15 GPIO_ACTIVE_LOW>;
-			linux,default-trigger = "phy1tpt";
-		};
-
-		wlan5g {
-			label = "tp-link:green:wlan5g";
-			gpios = <&gpio 19 GPIO_ACTIVE_LOW>;
-			linux,default-trigger = "phy0tpt";
-		};
-
-		lan {
-			label = "tp-link:green:lan";
-			gpios = <&gpio 20 GPIO_ACTIVE_LOW>;
-		};
-
-		wan {
-			label = "tp-link:green:wan";
-			gpios = <&gpio 7 GPIO_ACTIVE_LOW>;
-		};
-
-		wan_fail {
-			label = "tp-link:amber:wan";
-			gpios = <&gpio 8 GPIO_ACTIVE_LOW>;
-		};
-
-		wps {
-			label = "tp-link:green:wps";
-			gpios = <&gpio 9 GPIO_ACTIVE_LOW>;
-		};
-	};
-
-	keys {
-		compatible = "gpio-keys";
-
-		reset {
-			label = "Reset button";
-			linux,code = <KEY_RESTART>;
-			gpios = <&gpio 5 GPIO_ACTIVE_LOW>;
-			debounce-interval = <60>;
-		};
-
-		wps {
-			label = "WPS button";
-			linux,code = <KEY_WPS_BUTTON>;
-			gpios = <&gpio 6 GPIO_ACTIVE_LOW>;
-			debounce-interval = <60>;
-		};
+	chosen {
+		bootargs = "console=ttyS0,115200n8";
 	};
 };
 
@@ -92,54 +27,6 @@
 	status = "okay";
 };
 
-&spi {
-	status = "okay";
-
-	num-cs = <1>;
-
-	flash@0 {
-		compatible = "jedec,spi-nor";
-		reg = <0>;
-		spi-max-frequency = <25000000>;
-
-		partitions {
-			compatible = "fixed-partitions";
-			#address-cells = <1>;
-			#size-cells = <1>;
-
-			partition@0 {
-				label = "u-boot";
-				reg = <0x000000 0x020000>;
-				read-only;
-			};
-
-			mac: partition@20000 {
-				label = "mac";
-				reg = <0x020000 0x010000>;
-				read-only;
-			};
-
-			partition@30000 {
-				compatible = "denx,uimage";
-				label = "firmware";
-				reg = <0x030000 0x7a0000>;
-			};
-
-			partition@7d0000 {
-				label = "tplink";
-				reg = <0x7d0000 0x020000>;
-				read-only;
-			};
-
-			art: partition@7f0000 {
-				label = "art";
-				reg = <0x7f0000 0x010000>;
-				read-only;
-			};
-		};
-	};
-};
-
 &mdio0 {
 	status = "okay";
 
@@ -161,8 +48,9 @@
 	status = "okay";
 
 	phy-mode = "sgmii";
-	mtd-mac-address = <&mac 0x8>;
 	phy-handle = <&phy0>;
+
+	mtd-mac-address = <&mac 0x8>;
 };
 
 &wmac {