ramips: add support for JDCloud RE-CP-02

- Soc: MediaTek MT7621AT
- RAM: 512 MB (DDR3)
- Flash: 16 MB (SPI NOR)
- WiFi: MediaTek MT7905DAN, MediaTek MT7975DN
- Ethernet: 1 WAN, 3 LAN (Gigabit)
- Buttons: Reset, Joylink
- LEDs: (red, blue, green), routed to one indicator in the top of the
  device
- Power: DC 12V 1A tip positive
- 1 TF Card Slot

The pins for the serial console are already labeled on the board
J4(V, R, T, G). Serial settings: 3.3V, 115200

MAC addresses:

|         | MAC               | Algorithm |
| ------- | ----------------- | --------- |
| label   | dc:d8:xx:xx:xx:01 | label     |
| LAN     | dc:d8:xx:xx:xx:01 | label     |
| WAN     | dc:d8:xx:xx:xx:02 | label+1   |
| WLAN 2g | dc:d8:xx:xx:xx:03 | label+2   |
| WLAN 5g | de:d8:xx:xx:xx:04 | label+3   |

1. rename the
   openwrt-ramips-mt7621-jdcloud_re-cp-02-squashfs-sysupgrade.bin
   to JDCOS.bin

2. start a TFTP server from IP address 192.168.68.10 and serve the
   image named JDCOS.bin

3. connect your device to the LAN port

4. power up the router and press any key on the console to interrupt
   the boot process.

5. enter the following commands on the router console

   1. setenv bootcount 6

   2. saveenv

   3. reset

      > NOTE: wait for the restart, it will automatically fetch the
      > image named JDCOS.bin from the TFTP server and write it into
      > the flash. After the writing is completed, the router will be
      > automatically restarted.

Unable to recognize large-capacity TF card, see #14042. But the patch
https://github.com/openwrt/openwrt/issues/14042#issuecomment-1910769942
works

Co-Authored-By: Jianti Chen <clbcjt@outlook.com>
Signed-off-by: Sheng Huang <shenghuang147@gmail.com>

3 files changed, 198 insertions, 0 deletions

diff --git a/target/linux/ramips/dts/mt7621_jdcloud_re-cp-02.dts b/target/linux/ramips/dts/mt7621_jdcloud_re-cp-02.dts
new file mode 100644
index 0000000000..8512ff96b0
--- /dev/null
+++ b/target/linux/ramips/dts/mt7621_jdcloud_re-cp-02.dts
@@ -0,0 +1,186 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "mt7621.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/leds/common.h>
+
+/ {
+	compatible = "jdcloud,re-cp-02", "mediatek,mt7621-soc";
+	model = "JDCloud RE-CP-02";
+
+	aliases {
+		label-mac-device = &gmac0;
+		led-boot = &led_status_blue;
+		led-failsafe = &led_status_red;
+		led-running = &led_status_green;
+		led-upgrade = &led_status_blue;
+	};
+
+	chosen {
+		bootargs = "console=ttyS0,115200n8";
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led_status_red: led-0 {
+			color = <LED_COLOR_ID_RED>;
+			function = LED_FUNCTION_STATUS;
+			gpios = <&gpio 6 GPIO_ACTIVE_LOW>;
+		};
+
+		led_status_blue: led-1 {
+			color = <LED_COLOR_ID_BLUE>;
+			function = LED_FUNCTION_STATUS;
+			gpios = <&gpio 7 GPIO_ACTIVE_LOW>;
+		};
+
+		led_status_green: led-2 {
+			color = <LED_COLOR_ID_GREEN>;
+			function = LED_FUNCTION_STATUS;
+			gpios = <&gpio 8 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		wps {
+			label = "wps";
+			gpios = <&gpio 15 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_WPS_BUTTON>;
+		};
+
+		reset {
+			label = "reset";
+			gpios = <&gpio 18 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+	};
+};
+
+&spi0 {
+	status = "okay";
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <10000000>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "U-Boot";
+				reg = <0x0 0x40000>;
+				read-only;
+			};
+
+			partition@40000 {
+				compatible = "u-boot,env";
+				label = "Config";
+				reg = <0x40000 0x10000>;
+			};
+
+			partition@50000 {
+				label = "Factory";
+				reg = <0x50000 0x40000>;
+				read-only;
+
+				nvmem-layout {
+					compatible = "fixed-layout";
+					#address-cells = <1>;
+					#size-cells = <1>;
+
+					eeprom_factory_0: eeprom@0 {
+						reg = <0x0 0xe00>;
+					};
+
+					macaddr_factory_3fff4: macaddr@3fff4 {
+						reg = <0x3fff4 0x6>;
+					};
+
+					macaddr_factory_3fffa: macaddr@3fffa {
+						reg = <0x3fffa 0x6>;
+					};
+				};
+			};
+
+			partition@90000 {
+				compatible = "denx,uimage";
+				label = "firmware";
+				reg = <0x90000 0xf70000>;
+			};
+		};
+	};
+};
+
+&state_default {
+	gpio {
+		groups = "uart3", "jtag", "wdt";
+		function = "gpio";
+	};
+};
+
+&sdhci {
+	status = "okay";
+};
+
+&pcie {
+	status = "okay";
+};
+
+&pcie1 {
+	wifi@0,0 {
+		compatible = "mediatek,mt76";
+		reg = <0x0000 0 0 0 0>;
+		nvmem-cells = <&eeprom_factory_0>;
+		nvmem-cell-names = "eeprom";
+		mediatek,disable-radar-background;
+	};
+};
+
+&gmac0 {
+	nvmem-cells = <&macaddr_factory_3fff4>;
+	nvmem-cell-names = "mac-address";
+};
+
+&gmac1 {
+	status = "okay";
+	label = "wan";
+	phy-handle = <&ethphy4>;
+
+	nvmem-cells = <&macaddr_factory_3fffa>;
+	nvmem-cell-names = "mac-address";
+};
+
+&ethphy4 {
+	/delete-property/ interrupts;
+};
+
+&switch0 {
+	ports {
+		port@1 {
+			status = "okay";
+			label = "lan1";
+		};
+
+		port@2 {
+			status = "okay";
+			label = "lan2";
+		};
+
+		port@3 {
+			status = "okay";
+			label = "lan3";
+		};
+	};
+};
+
+&xhci {
+	status = "disabled";
+};
diff --git a/target/linux/ramips/image/mt7621.mk b/target/linux/ramips/image/mt7621.mk
index 4c6b7057d5..cbaf6a9c59 100644
--- a/target/linux/ramips/image/mt7621.mk
+++ b/target/linux/ramips/image/mt7621.mk
@@ -1534,6 +1534,15 @@ define Device/jcg_y2
 endef
 TARGET_DEVICES += jcg_y2
 
+define Device/jdcloud_re-cp-02
+  $(Device/dsa-migration)
+  IMAGE_SIZE := 16000k
+  DEVICE_VENDOR := JD-Cloud
+  DEVICE_MODEL := RE-CP-02
+  DEVICE_PACKAGES := kmod-mt7915-firmware kmod-sdhci-mt7620
+endef
+TARGET_DEVICES += jdcloud_re-cp-02
+
 define Device/keenetic_kn-3010
   $(Device/dsa-migration)
   $(Device/uimage-lzma-loader)
diff --git a/target/linux/ramips/mt7621/base-files/etc/init.d/bootcount b/target/linux/ramips/mt7621/base-files/etc/init.d/bootcount
index c558247341..06846cd4ca 100755
--- a/target/linux/ramips/mt7621/base-files/etc/init.d/bootcount
+++ b/target/linux/ramips/mt7621/base-files/etc/init.d/bootcount
@@ -15,6 +15,9 @@ boot() {
 			$((0xff)) ]] || printf '\xff' | dd of=/dev/mtdblock3 \
 			count=1 bs=1 seek=$((0x20001))
 		;;
+	jdcloud,re-cp-02)
+		echo -e "bootcount 0\nbootlimit 5\nupgrade_available 1"  | /usr/sbin/fw_setenv -s -
+		;;
 	linksys,e5600|\
 	linksys,ea6350-v4|\
 	linksys,ea7300-v1|\