ath79: port TP-Link TL-WR741ND v4 and TL-WR740ND v4

This patch ports the TP-Link TL-WR741ND v4 and TL-WR740ND v4 to the
ath79 target.

Because the two devices share the same hw layout, this patch adds a common
.dtsi which is included by the two .dts.

Signed-off-by: Rocco Folino <rocco@folino.io>

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

@@ -45,6 +45,14 @@ case "$board" in
 	ucidef_set_led_switch "lan3" "LAN3" "$boardname:green:lan3" "switch0" "0x08"
 	ucidef_set_led_switch "lan4" "LAN4" "$boardname:green:lan4" "switch0" "0x10"
 	;;
+"tplink,tl-wr741nd-v4"|\
+"tplink,tl-wr740nd-v4")
+	ucidef_set_led_netdev "wan" "WAN" "tp-link:green:wan" "eth1"
+	ucidef_set_led_switch "lan1" "LAN1" "tp-link:green:lan1" "switch0" "0x04"
+	ucidef_set_led_switch "lan2" "LAN2" "tp-link:green:lan2" "switch0" "0x08"
+	ucidef_set_led_switch "lan3" "LAN3" "tp-link:green:lan3" "switch0" "0x10"
+	ucidef_set_led_switch "lan4" "LAN4" "tp-link:green:lan4" "switch0" "0x02"
+	;;
 esac
 
 board_config_flush

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

@@ -70,6 +70,13 @@ ath79_setup_interfaces()
 			"0@eth1" "1:lan" "2:lan" "3:lan" "4:lan"
 		;;
 
+	"tplink,tl-wr741nd-v4"|\
+	"tplink,tl-wr740nd-v4")
+		ucidef_set_interfaces_wan "eth1"
+		ucidef_add_switch "switch0" \
+			"0@eth0" "1:lan:4" "2:lan:3" "3:lan:2" "4:lan:1"
+		;;
+
 	"tplink,tl-wr1043nd-v1")
 		ucidef_add_switch "switch0" \
 			"1:lan" "2:lan" "3:lan" "4:lan" "0:wan" "5@eth0"

target/linux/ath79/dts/ar9331_tl-wr740nd-v4.dts

@@ -0,0 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/dts-v1/;
+
+#include "ar9331_tl-wr741nd-v4.dtsi"
+
+/ {
+	model = "TP-Link TL-WR740N/ND v4";
+	compatible = "tplink,tl-wr740n-v4";
+};

target/linux/ath79/dts/ar9331_tl-wr741nd-v4.dts

@@ -0,0 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/dts-v1/;
+
+#include "ar9331_tl-wr741nd-v4.dtsi"
+
+/ {
+	model = "TP-Link TL-WR741N/ND v4";
+	compatible = "tplink,tl-wr741n-v4";
+};

target/linux/ath79/dts/ar9331_tl-wr741nd-v4.dtsi

@@ -0,0 +1,173 @@
+// 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 "ar9331.dtsi"
+
+/ {
+	compatible = "tplink,tl-wr741n-v4", "qca,ar9331";
+	model = "TP-Link TL-WR741N/ND v4";
+
+	aliases {
+		serial0 = &uart;
+		led-status = &led_system;
+	};
+
+	gpio-keys-polled {
+		compatible = "gpio-keys-polled";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		poll-interval = <20>;
+
+		reset {
+			label = "reset";
+			linux,code = <KEY_RESTART>;
+			gpios = <&gpio 11 GPIO_ACTIVE_HIGH>;
+			debounce-interval = <60>;
+		};
+
+		wps {
+			label = "wps";
+			linux,code = <KEY_WPS_BUTTON>;
+			gpios = <&gpio 26 GPIO_ACTIVE_HIGH>;
+			debounce-interval = <60>;
+		};
+	};
+
+	gpio-leds {
+		compatible = "gpio-leds";
+		pinctrl-names = "default";
+		pinctrl-0 = <&switch_led_pins>;
+
+		lan1 {
+			label = "tp-link:green:lan1";
+			gpios = <&gpio 14 GPIO_ACTIVE_HIGH>;
+		};
+
+		lan2 {
+			label = "tp-link:green:lan2";
+			gpios = <&gpio 15 GPIO_ACTIVE_HIGH>;
+		};
+
+		lan3 {
+			label = "tp-link:green:lan3";
+			gpios = <&gpio 16 GPIO_ACTIVE_HIGH>;
+		};
+
+		lan4 {
+			label = "tp-link:green:lan4";
+			gpios = <&gpio 17 GPIO_ACTIVE_LOW>;
+		};
+
+		qss {
+			label = "tp-link:green:qss";
+			gpios = <&gpio 1 GPIO_ACTIVE_HIGH>;
+		};
+
+		led_system: system {
+			label = "tp-link:green:system";
+			gpios = <&gpio 27 GPIO_ACTIVE_HIGH>;
+		};
+
+		wan {
+			label = "tp-link:green:wan";
+			gpios = <&gpio 13 GPIO_ACTIVE_HIGH>;
+		};
+
+		wlan {
+			label = "tp-link:green:wlan";
+			gpios = <&gpio 0 GPIO_ACTIVE_HIGH>;
+			default-state = "off";
+			linux,default-trigger = "phy0tpt";
+		};
+	};
+};
+
+&spi {
+	status = "okay";
+	num-cs = <1>;
+
+	flash@0 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		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;
+			};
+
+			firmware: partition@20000 {
+				reg = <0x20000 0x3d0000>;
+				label = "firmware";
+			};
+
+			art: partition@3f0000 {
+				reg = <0x3f0000 0x10000>;
+				label = "art";
+				read-only;
+			};
+		};
+	};
+};
+
+&mdio0 {
+	status = "okay";
+
+	phy4: ethernet-phy@4 {
+		reg = <4>;
+		phy-mode = "mii";
+	};
+};
+
+&eth0 {
+	status = "okay";
+
+	phy-handle = <&phy4>;
+
+	mtd-mac-address = <&uboot 0x1fc00>;
+	mtd-mac-address-increment = <1>;
+
+	gmac-config {
+		device = <&gmac>;
+
+		switch-phy-addr-swap = <1>;
+		switch-phy-swap = <1>;
+	};
+};
+
+&eth1 {
+	status = "okay";
+
+	mtd-mac-address = <&uboot 0x1fc00>;
+	mtd-mac-address-increment = <(-1)>;
+
+	fixed-link {
+		speed = <1000>;
+		full-duplex;
+	};
+};
+
+&gpio {
+	status = "okay";
+};
+
+&uart {
+	status = "okay";
+};
+
+&wmac {
+	status = "okay";
+	mtd-cal-data = <&art 0x1000>;
+	mtd-mac-address = <&uboot 0x1fc00>;
+};

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

@@ -60,6 +60,24 @@ define Device/tl-wr740n-v2
 endef
 TARGET_DEVICES += tl-wr740n-v2
 
+define Device/tl-wr740nd-v4
+  $(Device/tplink-4mlzma)
+  ATH_SOC := ar9331
+  DEVICE_TITLE := TP-LINK TL-WR740N/ND v4
+  TPLINK_HWID := 0x07400004
+  SUPPORTED_DEVICES := tplink,tl-wr740n-v4 tl-wr740n-v4
+endef
+TARGET_DEVICES += tl-wr740nd-v4
+
+define Device/tl-wr741nd-v4
+  $(Device/tplink-4mlzma)
+  ATH_SOC := ar9331
+  DEVICE_TITLE := TP-LINK TL-WR741N/ND v4
+  TPLINK_HWID := 0x07410004
+  SUPPORTED_DEVICES := tplink,tl-wr741n-v4 tl-wr741n-v4
+endef
+TARGET_DEVICES += tl-wr741nd-v4
+
 define Device/tl-wr841-v7
   $(Device/tplink-4m)
   ATH_SOC := ar7241