ramips: add support for ELECOM WRC-2533GST2

ELECOM WRC-2533GST2 is a 2.4/5 GHz band 11ac (Wi-Fi 5) router, based
on MT7621A.

Specification:

- SoC		: MediaTek MT7621A
- RAM		: DDR3 256 MiB
- Flash		: SPI-NOR 32 MiB
- WLAN		: 2.4/5 GHz 4T4R (2x MediaTek MT7615)
- Ethernet	: 10/100/1000 Mbps x5
  - Switch	: MediaTek MT7530 (SoC)
- LED/keys	: 4x/6x (2x buttons, 1x slide-switch)
- UART		: through-hole on PCB
  - J4: 3.3V, GND, TX, RX from ethernet port side
  - 57600n8
- Power		: 12VDC, 1.5A

Flash instruction using factory image:

1. Boot WRC-2533GST2 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

Signed-off-by: INAGAKI Hiroshi <musashino.open@gmail.com>

target/linux/ramips/dts/mt7621_elecom_wrc-1900gst.dts

@@ -7,3 +7,35 @@
 	compatible = "elecom,wrc-1900gst", "mediatek,mt7621-soc";
 	model = "ELECOM WRC-1900GST";
 };
+
+&partitions {
+	partition@50000 {
+		compatible = "denx,uimage";
+		label = "firmware";
+		reg = <0x50000 0xb00000>;
+	};
+
+	partition@b50000 {
+		label = "tm_pattern";
+		reg = <0xb50000 0x380000>;
+		read-only;
+	};
+
+	partition@ed0000 {
+		label = "tm_key";
+		reg = <0xed0000 0x80000>;
+		read-only;
+	};
+
+	partition@f50000 {
+		label = "art_block";
+		reg = <0xf50000 0x30000>;
+		read-only;
+	};
+
+	partition@f80000 {
+		label = "user_data";
+		reg = <0xf80000 0x80000>;
+		read-only;
+	};
+};

target/linux/ramips/dts/mt7621_elecom_wrc-2533gst.dts

@@ -6,3 +6,35 @@
 	compatible = "elecom,wrc-2533gst", "mediatek,mt7621-soc";
 	model = "ELECOM WRC-2533GST";
 };
+
+&partitions {
+	partition@50000 {
+		compatible = "denx,uimage";
+		label = "firmware";
+		reg = <0x50000 0xb00000>;
+	};
+
+	partition@b50000 {
+		label = "tm_pattern";
+		reg = <0xb50000 0x380000>;
+		read-only;
+	};
+
+	partition@ed0000 {
+		label = "tm_key";
+		reg = <0xed0000 0x80000>;
+		read-only;
+	};
+
+	partition@f50000 {
+		label = "art_block";
+		reg = <0xf50000 0x30000>;
+		read-only;
+	};
+
+	partition@f80000 {
+		label = "user_data";
+		reg = <0xf80000 0x80000>;
+		read-only;
+	};
+};

target/linux/ramips/dts/mt7621_elecom_wrc-2533gst2.dts

@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/dts-v1/;
+
+#include "mt7621_elecom_wrc-gst.dtsi"
+
+/ {
+	compatible = "elecom,wrc-2533gst2", "mediatek,mt7621-soc";
+	model = "ELECOM WRC-2533GST2";
+};
+
+&partitions {
+	partition@50000 {
+		compatible = "denx,uimage";
+		label = "firmware";
+		reg = <0x50000 0x1800000>;
+	};
+
+	partition@1850000 {
+		label = "tm_pattern";
+		reg = <0x1850000 0x400000>;
+		read-only;
+	};
+
+	partition@1c50000 {
+		label = "tm_key";
+		reg = <0x1c50000 0x100000>;
+		read-only;
+	};
+
+	partition@1d50000 {
+		label = "nvram";
+		reg = <0x1d50000 0xb0000>;
+		read-only;
+	};
+
+	partition@1e00000 {
+		label = "user_data";
+		reg = <0x1e00000 0x200000>;
+		read-only;
+	};
+};

target/linux/ramips/dts/mt7621_elecom_wrc-gst.dtsi

@@ -129,7 +129,7 @@
 		reg = <0>;
 		spi-max-frequency = <40000000>;
 
-		partitions {
+		partitions: partitions {
 			compatible = "fixed-partitions";
 			#address-cells = <1>;
 			#size-cells = <1>;
@@ -151,36 +151,6 @@
 				reg = <0x40000 0x10000>;
 				read-only;
 			};
-
-			partition@50000 {
-				compatible = "denx,uimage";
-				label = "firmware";
-				reg = <0x50000 0xb00000>;
-			};
-
-			partition@b50000 {
-				label = "tm_pattern";
-				reg = <0xb50000 0x380000>;
-				read-only;
-			};
-
-			partition@ed0000 {
-				label = "tm_key";
-				reg = <0xed0000 0x80000>;
-				read-only;
-			};
-
-			partition@f50000 {
-				label = "art_block";
-				reg = <0xf50000 0x30000>;
-				read-only;
-			};
-
-			partition@f80000 {
-				label = "user_data";
-				reg = <0xf80000 0x80000>;
-				read-only;
-			};
 		};
 	};
 };