ramips: mt7621: add support for Cudy X6 v2

Rename existing device to v1 and create common .dtsi
Difference to v1: 16MB Flash

Specifications:

SoC: MediaTek MT7621
RAM: 256 MB
Flash: 16 MB (SPI NOR, XM25QH128C on my device)
WiFi: MediaTek MT7915E
Switch: 1 WAN, 4 LAN (Gigabit)
Buttons: Reset, WPS
LEDs: Two Power LEDs (blue and red; together they form purple)
Power: DC 12V 1A center positive
Serial: 115200 8N1
        C440 - (3V3 - GND - RX - TX) - C41 | v1 and v2
               (P   - G   - R  - T)        | v2 labels them on the board
Installation:

Download and flash the manufacturer's built OpenWrt image available at
http://www.cudytech.com/openwrt_software_download
Install the new OpenWrt image via luci (System -> Backup/Flash firmware)
Be sure to NOT keep settings.

Recovery:

Loads only signed manufacture firmware due to bootloader RSA verification
Serve tftp-recovery image as /recovery.bin on 192.168.1.88/24
Connect to any lan ethernet port
Power on the device while holding the reset button
Wait at least 8 seconds before releasing reset button for image to
download

MAC addresses as verified by OEM firmware:

use   address             source
LAN   f4:a4:54:86:75:a2   label
WAN   f4:a4:54:86:75:a3   label + 1
2g    f4:a4:54:86:75:a2   label
5g    f6:a4:54:b6:75:a2   label + LA-Bit set + 4th oktet increased

The label MAC address is found in bdinfo 0xde00.

Signed-off-by: Felix Baumann <felix.bau@gmx.de>

3 files changed, 119 insertions, 48 deletions

diff --git a/target/linux/ramips/dts/mt7621_cudy_x6-v1.dts b/target/linux/ramips/dts/mt7621_cudy_x6-v1.dts
new file mode 100644
index 0000000000..cfae15e565
--- /dev/null
+++ b/target/linux/ramips/dts/mt7621_cudy_x6-v1.dts
@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "mt7621_cudy_x6.dtsi"
+
+/ {
+	compatible = "cudy,x6-v1", "mediatek,mt7621-soc";
+	model = "CUDY X6 v1";
+};
+
+&partitions {
+	partition@50000 {
+		compatible = "denx,uimage";
+		label = "firmware";
+		reg = <0x50000 0x1f80000>;
+	};
+
+	partition@1fd0000 {
+		label = "debug";
+		reg = <0x1fd0000 0x10000>;
+		read-only;
+	};
+
+	partition@1fe0000 {
+		label = "backup";
+		reg = <0x1fe0000 0x10000>;
+		read-only;
+	};
+
+	partition@1ff0000 {
+		label = "bdinfo";
+		reg = <0x1ff0000 0x10000>;
+		read-only;
+
+		compatible = "nvmem-cells";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		macaddr_bdinfo_de00: macaddr@de00 {
+			reg = <0xde00 0x6>;
+		};
+	};
+};
+
+&gmac0 {
+	nvmem-cells = <&macaddr_bdinfo_de00>;
+	nvmem-cell-names = "mac-address";
+};
+
+&gmac1 {
+	nvmem-cells = <&macaddr_bdinfo_de00>;
+	nvmem-cell-names = "mac-address";
+	mac-address-increment = <1>;
+};
+
+&wifi {
+	nvmem-cells = <&macaddr_bdinfo_de00>;
+	nvmem-cell-names = "mac-address";
+};
diff --git a/target/linux/ramips/dts/mt7621_cudy_x6-v2.dts b/target/linux/ramips/dts/mt7621_cudy_x6-v2.dts
new file mode 100644
index 0000000000..16fa15befc
--- /dev/null
+++ b/target/linux/ramips/dts/mt7621_cudy_x6-v2.dts
@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "mt7621_cudy_x6.dtsi"
+
+/ {
+	compatible = "cudy,x6-v2", "mediatek,mt7621-soc";
+	model = "CUDY X6 v2";
+};
+
+&partitions {
+	partition@50000 {
+		compatible = "denx,uimage";
+		label = "firmware";
+		reg = <0x50000 0xf80000>;
+	};
+
+	partition@fd0000 {
+		label = "debug";
+		reg = <0xfd0000 0x10000>;
+		read-only;
+	};
+
+	partition@fe0000 {
+		label = "backup";
+		reg = <0xfe0000 0x10000>;
+		read-only;
+	};
+
+	partition@ff0000 {
+		label = "bdinfo";
+		reg = <0xff0000 0x10000>;
+		read-only;
+
+		compatible = "nvmem-cells";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		macaddr_bdinfo_de00: macaddr@de00 {
+			reg = <0xde00 0x6>;
+		};
+	};
+};
+
+&gmac0 {
+	nvmem-cells = <&macaddr_bdinfo_de00>;
+	nvmem-cell-names = "mac-address";
+};
+
+&gmac1 {
+	nvmem-cells = <&macaddr_bdinfo_de00>;
+	nvmem-cell-names = "mac-address";
+	mac-address-increment = <1>;
+};
+
+&wifi {
+	nvmem-cells = <&macaddr_bdinfo_de00>;
+	nvmem-cell-names = "mac-address";
+};
diff --git a/target/linux/ramips/dts/mt7621_cudy_x6.dts b/target/linux/ramips/dts/mt7621_cudy_x6.dtsi
index 5d5bb5150c..4c34f58a4b 100644
--- a/target/linux/ramips/dts/mt7621_cudy_x6.dts
+++ b/target/linux/ramips/dts/mt7621_cudy_x6.dtsi
@@ -6,9 +6,6 @@
 #include <dt-bindings/input/input.h>
 
 / {
-	compatible = "cudy,x6", "mediatek,mt7621-soc";
-	model = "CUDY X6";
-
 	aliases {
 		led-boot = &led_internet_blue;
 		led-failsafe = &led_internet_red;
@@ -61,7 +58,7 @@
 		reg = <0>;
 		spi-max-frequency = <50000000>;
 
-		partitions {
+		partitions: partitions {
 			compatible = "fixed-partitions";
 			#address-cells = <1>;
 			#size-cells = <1>;
@@ -84,37 +81,7 @@
 				read-only;
 			};
 
-			partition@50000 {
-				compatible = "denx,uimage";
-				label = "firmware";
-				reg = <0x50000 0x1f80000>;
-			};
-
-			partition@1fd0000 {
-				label = "debug";
-				reg = <0x1fd0000 0x10000>;
-				read-only;
-			};
-
-			partition@1fe0000 {
-				label = "backup";
-				reg = <0x1fe0000 0x10000>;
-				read-only;
-			};
-
-			partition@1ff0000 {
-				label = "bdinfo";
-				reg = <0x1ff0000 0x10000>;
-				read-only;
-
-				compatible = "nvmem-cells";
-				#address-cells = <1>;
-				#size-cells = <1>;
-
-				macaddr_bdinfo_de00: macaddr@de00 {
-					reg = <0xde00 0x6>;
-				};
-			};
+			/* additional partitions in DTS */
 		};
 	};
 };
@@ -124,30 +91,18 @@
 };
 
 &pcie1 {
-	wifi@0,0 {
+	wifi:wifi@0,0 {
 		compatible = "mediatek,mt76";
 		reg = <0x0000 0 0 0 0>;
 		mediatek,mtd-eeprom = <&factory 0x0000>;
 		mediatek,disable-radar-background;
-
-		nvmem-cells = <&macaddr_bdinfo_de00>;
-		nvmem-cell-names = "mac-address";
 	};
 };
 
-&gmac0 {
-	nvmem-cells = <&macaddr_bdinfo_de00>;
-	nvmem-cell-names = "mac-address";
-};
-
 &gmac1 {
 	status = "okay";
 	label = "wan";
 	phy-handle = <&ethphy4>;
-
-	nvmem-cells = <&macaddr_bdinfo_de00>;
-	nvmem-cell-names = "mac-address";
-	mac-address-increment = <1>;
 };
 
 &mdio {