ramips: add support for ELECOM WRC-2533GHBK-I

ELECOM WRC-2533GHBK-I is a 2.4/5 GHz band 11ac (Wi-Fi 5) router, based
on MT7621A.

Specification:

- SoC		: MediaTek MT7621A
- RAM		: DDR3 128 MiB
- Flash		: SPI-NOR 16 MiB
- WLAN		: 2.4/5 GHz 4T4R (2x MediaTek MT7615)
- Ethernet	: 10/100/1000 Mbps x5
  - Switch	: MediaTek MT7530 (SoC)
- LED/keys	: 4x/3x (2x buttons, 1x slide-switch)
- UART		: through-hole on PCB
  - J4: 3.3V, RX, GND, TX from SoC side
  - 57600n8
- Power		: 12VDC, 1.5A

Flash instruction using factory image:

1. Boot WRC-2533GHBK-I normally
2. Access to "http://192.168.2.1/" and open firmware update page
   ("ファームウェア更新")
3. Select the OpenWrt factory image and click apply ("適用") button
4. Wait ~150 seconds to complete flashing

MAC addresses:

LAN	: BC:5C:4C:xx:xx:89 (Config, ethaddr (text))
WAN	: BC:5C:4C:xx:xx:88 (Config, wanaddr (text))
2.4GHz	: BC:5C:4C:xx:xx:8A (Factory, 0x4    (hex))
5GHz	: BC:5C:4C:xx:xx:8B (Factory, 0x8004 (hex))

Signed-off-by: INAGAKI Hiroshi <musashino.open@gmail.com>
Reviewed-by: Sungbo Eo <mans0n@gorani.run>

3 files changed, 218 insertions, 0 deletions

diff --git a/target/linux/ramips/dts/mt7621_elecom_wrc-2533ghbk-i.dts b/target/linux/ramips/dts/mt7621_elecom_wrc-2533ghbk-i.dts
new file mode 100644
index 0000000000..a5436d55d7
--- /dev/null
+++ b/target/linux/ramips/dts/mt7621_elecom_wrc-2533ghbk-i.dts
@@ -0,0 +1,199 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "mt7621.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	compatible = "elecom,wrc-2533ghbk-i", "mediatek,mt7621-soc";
+	model = "ELECOM WRC-2533GHBK-I";
+
+	aliases {
+		led-boot = &led_power;
+		led-failsafe = &led_power;
+		led-running = &led_power;
+		led-upgrade = &led_power;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		wps {
+			label = "red:wps";
+			gpios = <&gpio 7 GPIO_ACTIVE_HIGH>;
+		};
+
+		led_power: power {
+			label = "white:power";
+			gpios = <&gpio 12 GPIO_ACTIVE_HIGH>;
+		};
+
+		wlan2g {
+			label = "white:wlan2g";
+			gpios = <&gpio 14 GPIO_ACTIVE_HIGH>;
+			linux,default-trigger = "phy0radio";
+		};
+
+		wlan5g {
+			label = "white:wlan5g";
+			gpios = <&gpio 15 GPIO_ACTIVE_HIGH>;
+			linux,default-trigger = "phy1radio";
+		};
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		auto {
+			label = "auto";
+			gpios = <&gpio 13 GPIO_ACTIVE_LOW>;
+			linux,code = <BTN_0>;
+			linux,input-type = <EV_SW>;
+		};
+
+		reset {
+			label = "reset";
+			gpios = <&gpio 16 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+
+		wps {
+			label = "wps";
+			gpios = <&gpio 18 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_WPS_BUTTON>;
+		};
+	};
+};
+
+&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 0x30000>;
+				read-only;
+			};
+
+			partition@30000 {
+				label = "u-boot-env";
+				reg = <0x30000 0x10000>;
+				read-only;
+			};
+
+			factory: partition@40000 {
+				label = "factory";
+				reg = <0x40000 0x10000>;
+				read-only;
+			};
+
+			partition@50000 {
+				compatible = "denx,uimage";
+				label = "firmware";
+				reg = <0x50000 0x9a0000>;
+			};
+
+			partition@9f0000 {
+				label = "TM_1";
+				reg = <0x9f0000 0x200000>;
+				read-only;
+			};
+
+			partition@bf0000 {
+				label = "TM_2";
+				reg = <0xbf0000 0x200000>;
+				read-only;
+			};
+
+			partition@df0000 {
+				label = "manufacture";
+				reg = <0xdf0000 0x180000>;
+				read-only;
+			};
+
+			partition@f70000 {
+				label = "backup";
+				reg = <0xf70000 0x10000>;
+				read-only;
+			};
+
+			partition@f80000 {
+				label = "storage";
+				reg = <0xf80000 0x80000>;
+				read-only;
+			};
+		};
+	};
+};
+
+&switch0 {
+	ports {
+		port@0 {
+			status = "okay";
+			label = "wan";
+		};
+
+		port@1 {
+			status = "okay";
+			label = "lan4";
+		};
+
+		port@2 {
+			status = "okay";
+			label = "lan3";
+		};
+
+		port@3 {
+			status = "okay";
+			label = "lan2";
+		};
+
+		port@4 {
+			status = "okay";
+			label = "lan1";
+		};
+	};
+};
+
+&state_default {
+	gpio {
+		groups = "uart2", "uart3", "jtag", "wdt";
+		function = "gpio";
+	};
+};
+
+&pcie {
+	status = "okay";
+};
+
+&pcie0 {
+	wifi@0,0 {
+		compatible = "mediatek,mt76";
+		reg = <0x0000 0 0 0 0>;
+		mediatek,mtd-eeprom = <&factory 0x0>;
+		ieee80211-freq-limit = <2400000 2500000>;
+	};
+};
+
+&pcie1 {
+	wifi@0,0 {
+		compatible = "mediatek,mt76";
+		reg = <0x0000 0 0 0 0>;
+		mediatek,mtd-eeprom = <&factory 0x8000>;
+		ieee80211-freq-limit = <5000000 6000000>;
+	};
+};
+
+&xhci {
+	status = "disabled";
+};
diff --git a/target/linux/ramips/image/mt7621.mk b/target/linux/ramips/image/mt7621.mk
index ec34e61268..ce3a352337 100644
--- a/target/linux/ramips/image/mt7621.mk
+++ b/target/linux/ramips/image/mt7621.mk
@@ -466,6 +466,20 @@ define Device/elecom_wrc-1900gst
 endef
 TARGET_DEVICES += elecom_wrc-1900gst
 
+define Device/elecom_wrc-2533ghbk-i
+  $(Device/dsa-migration)
+  $(Device/uimage-lzma-loader)
+  DEVICE_VENDOR := ELECOM
+  DEVICE_MODEL := WRC-2533GHBK-I
+  IMAGE_SIZE := 9856k
+  IMAGES += factory.bin
+  IMAGE/factory.bin := $$(sysupgrade_bin) | check-size | \
+	elx-header 0107002d 8844A2D168B45A2D | \
+	elecom-product-header WRC-2533GHBK-I
+  DEVICE_PACKAGES := kmod-mt7615e kmod-mt7615-firmware
+endef
+TARGET_DEVICES += elecom_wrc-2533ghbk-i
+
 define Device/elecom_wrc-2533gst
   $(Device/elecom_wrc-gs)
   IMAGE_SIZE := 11264k
diff --git a/target/linux/ramips/mt7621/base-files/etc/board.d/02_network b/target/linux/ramips/mt7621/base-files/etc/board.d/02_network
index 154f218bfe..dbb8e04abb 100755
--- a/target/linux/ramips/mt7621/base-files/etc/board.d/02_network
+++ b/target/linux/ramips/mt7621/base-files/etc/board.d/02_network
@@ -98,6 +98,11 @@ ramips_setup_macs()
 		lan_mac=$(mtd_get_mac_ascii u-boot-env ethaddr)
 		wan_mac=$(mtd_get_mac_ascii u-boot-env wanaddr)
 		;;
+	elecom,wrc-2533ghbk-i)
+		lan_mac=$(mtd_get_mac_ascii u-boot-env ethaddr)
+		wan_mac=$(mtd_get_mac_ascii u-boot-env wanaddr)
+		label_mac=$wan_mac
+		;;
 	hiwifi,hc5962)
 		lan_mac=$(mtd_get_mac_ascii bdinfo "Vfac_mac ")
 		label_mac=$lan_mac