ARM: dts: mediatek: add basic support for Lenovo A369i board

This smartphone uses a MediaTek MT6572 system-on-chip with 512MB of RAM.
It can currently boot into initramfs with a working UART and
Simple Framebuffer using already initialized panel by the bootloader.

Signed-off-by: Max Shevchenko <wctrl@proton.me>
Link: https://lore.kernel.org/r/20250702-mt6572-v4-11-bde75b7ed445@proton.me
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>

Author: Max Shevchenko

arch/arm/boot/dts/mediatek/Makefile

@@ -2,6 +2,7 @@
 dtb-$(CONFIG_ARCH_MEDIATEK) += \
 	mt2701-evb.dtb \
 	mt6572-jty-d101.dtb \
+	mt6572-lenovo-a369i.dtb \
 	mt6580-evbp1.dtb \
 	mt6582-prestigio-pmt5008-3g.dtb \
 	mt6589-aquaris5.dtb \

arch/arm/boot/dts/mediatek/mt6572-lenovo-a369i.dts

@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2025 Max Shevchenko <wctrl@proton.me>
+ */
+
+/dts-v1/;
+#include "mt6572.dtsi"
+
+/ {
+	model = "Lenovo A369i";
+	compatible = "lenovo,a369i", "mediatek,mt6572";
+
+	aliases {
+		serial0 = &uart0;
+	};
+
+	chosen {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		stdout-path = "serial0:921600n8";
+
+		framebuffer: framebuffer@9fa00000 {
+			compatible = "simple-framebuffer";
+			memory-region = <&framebuffer_reserved>;
+			width = <480>;
+			height = <800>;
+			stride = <(480 * 2)>;
+			format = "r5g6b5";
+		};
+	};
+
+	memory@80000000 {
+		device_type = "memory";
+		reg = <0x80000000 0x20000000>;
+	};
+
+	reserved-memory {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+
+		connsys@80000000 {
+			reg = <0x80000000 0x100000>;
+			no-map;
+		};
+
+		framebuffer_reserved: framebuffer@9fa00000 {
+			reg = <0x9fa00000 0x600000>;
+			no-map;
+		};
+	};
+};
+
+&uart0 {
+	status = "okay";
+};