ath79: add support for TP-Link TL-WA850RE v1

This ports support for the TL-WA850RE v1 range extender from ar71xx
to ath79.

Specifications:
  Board: AP123 / AR9341 rev. 3
  Flash/RAM: 4/32 MiB
  CPU: 535 MHz
  WiFi: 2.4 GHz b/g/n
  Ethernet: 1 port (100M)

Flashing instructions:
Upload the factory image via the vendor firmware upgrade option.

Recovery:
Note that this device does not provide TFTP via ethernet like many
other TP-Link devices do. You will have to open the case if you
require recovery beyond failsafe.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
(cherry picked from commit 6eaea3a8ba6154674058396c728494aa911ed7f1)

target/linux/ath79/base-files/etc/board.d/01_leds

@@ -177,6 +177,15 @@ tplink,tl-mr3020-v1|\
 tplink,tl-mr3040-v2)
 	ucidef_set_led_netdev "lan" "LAN" "tp-link:green:lan" "eth0"
 	;;
+tplink,tl-wa850re-v1)
+	ucidef_set_led_netdev "lan" "LAN" "tp-link:blue:lan" "eth0"
+	ucidef_set_rssimon "wlan0" "200000" "1"
+	ucidef_set_led_rssi "rssilow" "RSSILOW" "tp-link:blue:signal1" "wlan0" "1" "100"
+	ucidef_set_led_rssi "rssimediumlow" "RSSIMEDIUMLOW" "tp-link:blue:signal2" "wlan0" "20" "100"
+	ucidef_set_led_rssi "rssimedium" "RSSIMEDIUM" "tp-link:blue:signal3" "wlan0" "40" "100"
+	ucidef_set_led_rssi "rssimediumhigh" "RSSIMEDIUMHIGH" "tp-link:blue:signal4" "wlan0" "60" "100"
+	ucidef_set_led_rssi "rssihigh" "RSSIHIGH" "tp-link:blue:signal5" "wlan0" "80" "100"
+	;;
 tplink,tl-wr740n-v1|\
 tplink,tl-wr740n-v3|\
 tplink,tl-wr741-v1|\

target/linux/ath79/base-files/etc/board.d/02_network

@@ -31,6 +31,7 @@ ath79_setup_interfaces()
 	tplink,tl-mr10u|\
 	tplink,tl-mr3020-v1|\
 	tplink,tl-mr3040-v2|\
+	tplink,tl-wa850re-v1|\
 	tplink,tl-wa901nd-v2|\
 	tplink,tl-wr703n|\
 	ubnt,bullet-m|\

target/linux/ath79/dts/ar9341_tplink_tl-wa.dtsi

@@ -0,0 +1,81 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+#include "ar9341.dtsi"
+
+/ {
+	aliases {
+		serial0 = &uart;
+	};
+};
+
+&ref {
+	clock-frequency = <25000000>;
+};
+
+&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>;
+
+			uboot: partition@0 {
+				label = "u-boot";
+				reg = <0x000000 0x020000>;
+				read-only;
+			};
+
+			partition@20000 {
+				compatible = "tplink,firmware";
+				label = "firmware";
+				reg = <0x020000 0x3d0000>;
+			};
+
+			art: partition@3f0000 {
+				label = "art";
+				reg = <0x3f0000 0x010000>;
+				read-only;
+			};
+		};
+	};
+};
+
+&uart {
+	status = "okay";
+};
+
+&eth0 {
+	status = "okay";
+
+	phy-handle = <&swphy0>;
+
+	mtd-mac-address = <&uboot 0x1fc00>;
+
+	gmac-config {
+		device = <&gmac>;
+
+		switch-phy-swap = <1>;
+	};
+};
+
+&eth1 {
+	compatible = "syscon", "simple-mfd";
+};
+
+&wmac {
+	status = "okay";
+
+	mtd-cal-data = <&art 0x1000>;
+	mtd-mac-address = <&uboot 0x1fc00>;
+};

target/linux/ath79/dts/ar9341_tplink_tl-wa850re-v1.dts

@@ -0,0 +1,79 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/dts-v1/;
+
+#include "ar9341_tplink_tl-wa.dtsi"
+
+/ {
+	model = "TP-Link TL-WA850RE v1";
+	compatible = "tplink,tl-wa850re-v1", "qca,ar9341";
+
+	aliases {
+		led-boot = &led_re;
+		led-failsafe = &led_re;
+		led-running = &led_re;
+		led-upgrade = &led_re;
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "Reset";
+			linux,code = <KEY_RESTART>;
+			gpios = <&gpio 17 GPIO_ACTIVE_LOW>;
+			debounce-interval = <60>;
+		};
+
+		wps {
+			label = "WPS";
+			linux,code = <KEY_WPS_BUTTON>;
+			gpios = <&gpio 16 GPIO_ACTIVE_LOW>;
+			debounce-interval = <60>;
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		lan {
+			label = "tp-link:blue:lan";
+			gpios = <&gpio 20 GPIO_ACTIVE_LOW>;
+		};
+
+		wlan {
+			label = "tp-link:blue:wlan";
+			gpios = <&gpio 13 GPIO_ACTIVE_LOW>;
+			linux,default-trigger = "phy0tpt";
+		};
+
+		led_re: re {
+			label = "tp-link:blue:re";
+			gpios = <&gpio 15 GPIO_ACTIVE_LOW>;
+		};
+
+		signal1 {
+			label = "tp-link:blue:signal1";
+			gpios = <&gpio 0 GPIO_ACTIVE_LOW>;
+		};
+
+		signal2 {
+			label = "tp-link:blue:signal2";
+			gpios = <&gpio 1 GPIO_ACTIVE_LOW>;
+		};
+
+		signal3 {
+			label = "tp-link:blue:signal3";
+			gpios = <&gpio 2 GPIO_ACTIVE_LOW>;
+		};
+
+		signal4 {
+			label = "tp-link:blue:signal4";
+			gpios = <&gpio 3 GPIO_ACTIVE_LOW>;
+		};
+
+		signal5 {
+			label = "tp-link:blue:signal5";
+			gpios = <&gpio 4 GPIO_ACTIVE_LOW>;
+		};
+	};
+};

target/linux/ath79/image/tiny-tp-link.mk

@@ -51,6 +51,16 @@ define Device/tplink_tl-mr3420-v1
 endef
 TARGET_DEVICES += tplink_tl-mr3420-v1
 
+define Device/tplink_tl-wa850re-v1
+  $(Device/tplink-4mlzma)
+  ATH_SOC := ar9341
+  DEVICE_TITLE := TP-Link TL-WA850RE v1
+  TPLINK_HWID := 0x08500001
+  DEVICE_PACKAGES := rssileds
+  SUPPORTED_DEVICES += tl-wa850re
+endef
+TARGET_DEVICES += tplink_tl-wa850re-v1
+
 define Device/tplink_tl-wa901nd-v2
   $(Device/tplink-4m)
   ATH_SOC := ar9132