ramips: Add Xiaomi Mi Router 4A 100M International

The international version of Mi Router 4A 100M is physically
identical to the non-international one, but appears to be
using a different partitioning scheme with the "overlay"
partition being 2MiB in size instead of 1MiB. This means
the following "firmware" partition starts at a different
address and the DTS needs to be adjusted for the firmware
to work.

Signed-off-by: Nita Vesa <[email protected]>

target/linux/ramips/dts/mt7628an_xiaomi_mi-router-4a-100m-intl.dts

@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "mt7628an_xiaomi_mi-router-4.dtsi"
+
+/ {
+	compatible = "xiaomi,mi-router-4a-100m-intl", "mediatek,mt7628an-soc";
+	model = "Xiaomi Mi Router 4A (100M International Edition)";
+};
+
+&partitions {
+	partition@60000 {
+		label = "overlay";
+		reg = <0x60000 0x200000>;
+		read-only;
+	};
+
+	partition@260000 {
+		label = "firmware";
+		reg = <0x260000 0xda0000>;
+		compatible = "denx,uimage";
+	};
+};
+
+&pcie {
+	status = "okay";
+};
+
+&pcie0 {
+	wifi@0,0 {
+		compatible = "mediatek,mt76";
+		reg = <0x0000 0 0 0 0>;
+		mediatek,mtd-eeprom = <&factory 0x8000>;
+		ieee80211-freq-limit = <5000000 6000000>;
+	};
+};
+
+&ethernet {
+	nvmem-cells = <&macaddr_factory_4>;
+	nvmem-cell-names = "mac-address";
+	mac-address-increment = <(-1)>;
+};
+
+&esw {
+	mediatek,portmap = <0x3e>;
+	mediatek,portdisable = <0x2a>;
+};
+
+&factory {
+	compatible = "nvmem-cells";
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	macaddr_factory_4: macaddr@4 {
+		reg = <0x4 0x6>;
+	};
+};

target/linux/ramips/image/mt76x8.mk

@@ -917,6 +917,16 @@ define Device/xiaomi_mi-router-4a-100m
 endef
 TARGET_DEVICES += xiaomi_mi-router-4a-100m
 
+define Device/xiaomi_mi-router-4a-100m-intl
+  IMAGE_SIZE := 14976k
+  DEVICE_VENDOR := Xiaomi
+  DEVICE_MODEL := Mi Router 4A
+  DEVICE_VARIANT := 100M International Edition
+  DEVICE_PACKAGES := kmod-mt76x2
+  SUPPORTED_DEVICES += xiaomi,mir4a-100m-intl
+endef
+TARGET_DEVICES += xiaomi_mi-router-4a-100m-intl
+
 define Device/xiaomi_mi-router-4c
   IMAGE_SIZE := 14976k
   DEVICE_VENDOR := Xiaomi

target/linux/ramips/mt76x8/base-files/etc/board.d/02_network

@@ -152,7 +152,8 @@ ramips_setup_interfaces()
 		ucidef_add_switch "switch0" \
 			"0:wan" "3:lan" "4:lan" "6@eth0"
 		;;
-	xiaomi,mi-router-4a-100m)
+	xiaomi,mi-router-4a-100m|\
+	xiaomi,mi-router-4a-100m-intl)
 		ucidef_add_switch "switch0" \
 			"4:lan:1" "2:lan:2" "0:wan" "6@eth0"
 		;;
@@ -280,6 +281,7 @@ ramips_setup_macs()
 		wan_mac=$(mtd_get_mac_binary factory 0x28)
 		;;
 	xiaomi,mi-router-4a-100m|\
+	xiaomi,mi-router-4a-100m-intl|\
 	xiaomi,mi-router-4c)
 		wan_mac=$(mtd_get_mac_binary factory 0x4)
 		;;