ath79: add support for TP-Link TL-WR842N/ND v1 router

This ports support for TP-Link TL-WR842N/ND v1 from ar71xx.

CPU: Atheros AR7241 400 MHz
RAM: 32 MiB
FLASH: 8 MiB
PORTS: 4 Port 100/10 Switch, 1 Port 100/10 Wan
WiFi: Atheros AR9287
LED: SYS, WiFi, LAN, WAN, 3G, QSS
BTN: WiFi, Reset/WPS

AR71xx target used "tl-mr3420" as board id so force flag is needed
if upgrading from old target.

Signed-off-by: Marcin Jurkowski <marcin1j@gmail.com>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com> [trivial cleanup]

4 files changed, 175 insertions, 0 deletions

diff --git a/target/linux/ath79/base-files/etc/board.d/02_network b/target/linux/ath79/base-files/etc/board.d/02_network
index fa7a618909..43b537835c 100755
--- a/target/linux/ath79/base-files/etc/board.d/02_network
+++ b/target/linux/ath79/base-files/etc/board.d/02_network
@@ -172,6 +172,7 @@ ath79_setup_interfaces()
 		ucidef_add_switch "switch0" \
 			"0@eth1" "1:lan:4" "2:lan:3" "3:lan:2" "4:lan:1"
 		;;
+	tplink,tl-wr842n-v1|\
 	tplink,tl-wr842n-v2)
 		ucidef_set_interface_wan "eth0"
 		ucidef_add_switch "switch0" \
diff --git a/target/linux/ath79/base-files/etc/hotplug.d/firmware/10-ath9k-eeprom b/target/linux/ath79/base-files/etc/hotplug.d/firmware/10-ath9k-eeprom
index e4d4a597a9..68943b4eb0 100644
--- a/target/linux/ath79/base-files/etc/hotplug.d/firmware/10-ath9k-eeprom
+++ b/target/linux/ath79/base-files/etc/hotplug.d/firmware/10-ath9k-eeprom
@@ -143,6 +143,7 @@ case "$FIRMWARE" in
 	tplink,tl-wr741-v1|\
 	tplink,tl-wr743nd-v1|\
 	tplink,tl-wr841-v7|\
+	tplink,tl-wr842n-v1|\
 	ubnt,airrouter|\
 	ubnt,bullet-m|\
 	ubnt,nano-m|\
diff --git a/target/linux/ath79/dts/ar7241_tplink_tl-wr842n-v1.dts b/target/linux/ath79/dts/ar7241_tplink_tl-wr842n-v1.dts
new file mode 100644
index 0000000000..282446b1e1
--- /dev/null
+++ b/target/linux/ath79/dts/ar7241_tplink_tl-wr842n-v1.dts
@@ -0,0 +1,164 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/dts-v1/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+#include "ar7241.dtsi"
+
+/ {
+	compatible = "tplink,tl-wr842n-v1", "qca,ar7241";
+	model = "TP-Link TL-WR842N/ND v1";
+
+	aliases {
+		led-boot = &led_system;
+		led-failsafe = &led_system;
+		led-running = &led_system;
+		led-upgrade = &led_system;
+	};
+
+	keys {
+		compatible = "gpio-keys-polled";
+		poll-interval = <20>;
+
+		rfkill {
+			label = "rfkill";
+			linux,code = <KEY_RFKILL>;
+			gpios = <&gpio 11 GPIO_ACTIVE_LOW>;
+			debounce-interval = <60>;
+		};
+
+		reset {
+			label = "reset";
+			linux,code = <KEY_RESTART>;
+			gpios = <&gpio 12 GPIO_ACTIVE_LOW>;
+			debounce-interval = <60>;
+		};
+	};
+
+	gpio-leds {
+		compatible = "gpio-leds";
+
+		led_system: system {
+			label = "tp-link:green:system";
+			gpios = <&gpio 1 GPIO_ACTIVE_LOW>;
+		};
+
+		qss {
+			label = "tp-link:green:qss";
+			gpios = <&gpio 0 GPIO_ACTIVE_LOW>;
+		};
+
+		led3g {
+			label = "tp-link:green:3g";
+			gpios = <&gpio 8 GPIO_ACTIVE_LOW>;
+			trigger-sources = <&hub_port>;
+			linux,default-trigger = "usbport";
+		};
+	};
+
+	ath9k-leds {
+		compatible = "gpio-leds";
+
+		wlan {
+			label = "tp-link:green:wlan";
+			gpios = <&ath9k 0 GPIO_ACTIVE_LOW>;
+			linux,default-trigger = "phy0tpt";
+		};
+	};
+
+	gpio-export {
+		compatible = "gpio-export";
+
+		gpio_usb_power {
+			gpio-export,name = "tp-link:power:usb";
+			gpio-export,output = <1>;
+			gpios = <&gpio 6 GPIO_ACTIVE_HIGH>;
+		};
+	};
+};
+
+&usb {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "okay";
+
+	hub_port: port@1 {
+		reg = <1>;
+		#trigger-source-cells = <0>;
+	};
+};
+
+&usb_phy {
+	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>;
+
+			uboot: partition@0 {
+				reg = <0x0 0x20000>;
+				label = "u-boot";
+				read-only;
+			};
+
+			partition@20000 {
+				compatible = "tplink,firmware";
+				reg = <0x20000 0x7d0000>;
+				label = "firmware";
+			};
+
+			partition@7f0000 {
+				reg = <0x7f0000 0x10000>;
+				label = "art";
+				read-only;
+			};
+		};
+	};
+};
+
+&pcie {
+	status = "okay";
+
+	ath9k: wifi@0,0 {
+		compatible = "pci168c,002e";
+		reg = <0x0000 0 0 0 0>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		qca,no-eeprom;
+		mtd-mac-address = <&uboot 0x1fc00>;
+	};
+};
+
+&eth0 {
+	status = "okay";
+
+	mtd-mac-address = <&uboot 0x1fc00>;
+	mtd-mac-address-increment = <(-1)>;
+};
+
+&eth1 {
+	status = "okay";
+
+	mtd-mac-address = <&uboot 0x1fc00>;
+	mtd-mac-address-increment = <1>;
+};
+
+&gpio {
+	status = "okay";
+};
+
+&uart {
+	status = "okay";
+};
diff --git a/target/linux/ath79/image/generic-tp-link.mk b/target/linux/ath79/image/generic-tp-link.mk
index b3f53e7469..3688c69fa4 100644
--- a/target/linux/ath79/image/generic-tp-link.mk
+++ b/target/linux/ath79/image/generic-tp-link.mk
@@ -99,6 +99,15 @@ define Device/tplink_tl-wr1043nd-v1
 endef
 TARGET_DEVICES += tplink_tl-wr1043nd-v1
 
+define Device/tplink_tl-wr842n-v1
+  $(Device/tplink-8m)
+  ATH_SOC := ar7241
+  DEVICE_TITLE := TP-LINK TL-WR842N/ND v1
+  DEVICE_PACKAGES := kmod-usb-core kmod-usb2 kmod-usb-ledtrig-usbport
+  TPLINK_HWID := 0x8420001
+endef
+TARGET_DEVICES += tplink_tl-wr842n-v1
+
 define Device/tplink_tl-wr842n-v2
   $(Device/tplink-8mlzma)
   ATH_SOC := ar9341