ramips: add support for TP-Link Deco M4R v4

This commit adds support for the V4 hardware revision of the Deco M4R.
V4 is a complete overhaul of the hardware compared to V1 and V2,
and is much more similar to the Archer C6 V3 and C6U V1.

Specifications:

  SoC: MediaTek MT7621AT (2 cores at 880 MHz, 4 threads)
  RAM: Kingston D1216ECMDXGJD (256 MB)
  Wireless 2.4 GHz: MediaTek MT7603EN
  Wireless 5 GHz: MediaTek MT7613BEN
  Flash: 16 MB SPI NOR

Installation:

Flash the *-factory.bin image in the U-Boot recovery webserver.
You can trigger this webserver by holding the reset button until the LED
flashes yellow, or by hooking up to serial pads on the board (clearly
labeled GND, RX and TX) and pressing `x` early in boot.

Once the factory image has been flashed, you can use the regular upgrade
procedure with sysupgrade images for subsequent flashes.

Signed-off-by: Mark Ceeha <hi@shiz.me>
Tested-by: Mark Ceeha <hi@shiz.me>

4 files changed, 221 insertions, 0 deletions

diff --git a/target/linux/ramips/dts/mt7621_tplink_deco-m4r-v4.dts b/target/linux/ramips/dts/mt7621_tplink_deco-m4r-v4.dts
new file mode 100644
index 0000000000..3d17dbf599
--- /dev/null
+++ b/target/linux/ramips/dts/mt7621_tplink_deco-m4r-v4.dts
@@ -0,0 +1,203 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include "mt7621.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	compatible = "tplink,deco-m4r-v4", "mediatek,mt7621-soc";
+	model = "TP-Link Deco M4R v4";
+
+	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 1 GPIO_ACTIVE_LOW>;
+			debounce-interval = <60>;
+			linux,code = <KEY_WPS_BUTTON>;
+		};
+
+		led {
+			label = "led";
+			gpios = <&gpio 2 GPIO_ACTIVE_LOW>;
+			debounce_interval = <60>;
+			linux,code = <KEY_BRIGHTNESS_TOGGLE>;
+		};
+
+		reset {
+			label = "reset";
+			gpios = <&gpio 4 GPIO_ACTIVE_LOW>;
+			debounce-interval = <60>;
+			linux,code = <KEY_RESTART>;
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		rssi {
+			label = "green:rssi";
+			gpios = <&gpio 5 GPIO_ACTIVE_LOW>;
+		};
+
+		lan {
+			label = "green:lan";
+			gpios = <&gpio 9 GPIO_ACTIVE_LOW>;
+		};
+
+		sys {
+			label = "green:sys";
+			gpios = <&gpio 10 GPIO_ACTIVE_LOW>;
+		};
+
+		wifi2g {
+			label = "green:wifi2g";
+			gpios = <&gpio 12 GPIO_ACTIVE_LOW>;
+			linux,default-trigger = "phy0tpt";
+		};
+
+		logo_red {
+			label = "red:logo";
+			gpios = <&gpio 14 GPIO_ACTIVE_LOW>;
+			/* match usage in v1 and v2 */
+			linux,default-trigger = "phy0tpt";
+		};
+
+		logo_blue {
+			label = "blue:logo";
+			gpios = <&gpio 15 GPIO_ACTIVE_LOW>;
+			/* match usage in v1 and v2 */
+			linux,default-trigger = "phy1tpt";
+
+		};
+
+		led_power: logo_green {
+			label = "green:logo";
+			gpios = <&gpio 13 GPIO_ACTIVE_LOW>;
+			/* match usage in v1 and v2 */
+			default_state = "on";
+		};
+	};
+};
+
+&state_default {
+	gpio {
+		groups = "i2c", "uart2", "uart3", "jtag", "wdt";
+		function = "gpio";
+	};
+};
+
+&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 0x010000>;
+				read-only;
+
+				compatible = "nvmem-cells";
+				#address-cells = <1>;
+				#size-cells = <1>;
+
+				macaddr_config_8: macaddr@8 {
+					reg = <0x8 0x6>;
+				};
+			};
+
+			partition@fb0000 {
+				label = "tplink";
+				reg = <0xfb0000 0x040000>;
+				read-only;
+			};
+
+			radio: partition@ff0000 {
+				label = "radio";
+				reg = <0xff0000 0x10000>;
+				read-only;
+			};
+		};
+	};
+};
+
+&ethernet {
+	pinctrl-names = "default";
+	pinctrl-0 = <&rgmii1_pins &mdio_pins>;
+};
+
+&gmac0 {
+	nvmem-cells = <&macaddr_config_8>;
+	nvmem-cell-names = "mac-address";
+	label = "dsa";
+};
+
+&switch0 {
+	ports {
+		port@0 {
+			status = "okay";
+			label = "eth0";
+		};
+
+		port@1 {
+			status = "okay";
+			label = "eth1";
+		};
+	};
+};
+
+&pcie {
+	status = "okay";
+};
+
+&pcie0 {
+	wifi@0,0 {
+		compatible = "mediatek,mt76";
+		reg = <0x0000 0 0 0 0>;
+		mediatek,mtd-eeprom = <&radio 0x0>;
+		ieee80211-freq-limit = <2400000 2500000>;
+	};
+};
+
+&pcie1 {
+	wifi@0,0 {
+		compatible = "mediatek,mt76";
+		reg = <0x0000 0 0 0 0>;
+		mediatek,mtd-eeprom = <&radio 0x8000>;
+		ieee80211-freq-limit = <5000000 6000000>;
+	};
+};
diff --git a/target/linux/ramips/image/mt7621.mk b/target/linux/ramips/image/mt7621.mk
index 3587fb613a..7f4f338039 100644
--- a/target/linux/ramips/image/mt7621.mk
+++ b/target/linux/ramips/image/mt7621.mk
@@ -2014,6 +2014,18 @@ define Device/tplink_archer-c6u-v1
 endef
 TARGET_DEVICES += tplink_archer-c6u-v1
 
+define Device/tplink_deco-m4r-v4
+  $(Device/dsa-migration)
+  $(Device/tplink-safeloader)
+  DEVICE_MODEL := Deco M4R
+  DEVICE_VARIANT := v4
+  DEVICE_PACKAGES := kmod-mt7603 kmod-mt7615e kmod-mt7663-firmware-ap
+  KERNEL := $(KERNEL_DTB) | uImage lzma
+  TPLINK_BOARD_ID := DECO-M4R-V4
+  IMAGE_SIZE := 15744k
+endef
+TARGET_DEVICES += tplink_deco-m4r-v4
+
 define Device/tplink_eap235-wall-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 597d7302ac..66b5a3ddd0 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
@@ -154,6 +154,9 @@ tplink,archer-c6u-v1)
 	ucidef_set_led_netdev "lan" "LAN" "green:lan" "br-lan"
 	ucidef_set_led_netdev "wan" "WAN" "green:wan" "wan"
 	;;
+tplink,deco-m4r-v4)
+	ucidef_set_led_netdev "lan" "LAN" "green:lan" "br-lan"
+	;;
 tplink,ec330-g5u-v1)
 	ucidef_set_led_netdev "lan" "Ethernet" "blue:ethernet" "br-lan" "link tx rx"
 	ucidef_set_led_netdev "wan" "Internet" "blue:internet" "wan" "link tx rx"
diff --git a/target/linux/ramips/mt7621/base-files/etc/board.d/02_network b/target/linux/ramips/mt7621/base-files/etc/board.d/02_network
index 67f58b10b2..3a864f6f04 100644
--- a/target/linux/ramips/mt7621/base-files/etc/board.d/02_network
+++ b/target/linux/ramips/mt7621/base-files/etc/board.d/02_network
@@ -105,6 +105,9 @@ ramips_setup_interfaces()
 	mikrotik,routerboard-760igs)
 		ucidef_set_interfaces_lan_wan "lan2 lan3 lan4 lan5" "wan sfp"
 		;;
+	tplink,deco-m4r-v4)
+		ucidef_set_interfaces_lan_wan "eth1" "eth0"
+		;;
 	tplink,eap235-wall-v1|\
 	tplink,eap615-wall-v1)
 		ucidef_set_interface_lan "lan0 lan1 lan2 lan3"