ARM: dts: mediatek: add basic support for MT6572 SoC

Add basic support for the MediaTek MT6572 SoC.

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Max Shevchenko <wctrl@proton.me>
Link: https://lore.kernel.org/r/20250702-mt6572-v4-9-bde75b7ed445@proton.me
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>

Author: Max Shevchenko

arch/arm/boot/dts/mediatek/mt6572.dtsi

@@ -0,0 +1,108 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2025 Max Shevchenko <wctrl@proton.me>
+ */
+
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+
+/ {
+	#address-cells = <1>;
+	#size-cells = <1>;
+	interrupt-parent = <&sysirq>;
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		enable-method = "mediatek,mt6589-smp";
+
+		cpu@0 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a7";
+			reg = <0x0>;
+		};
+		cpu@1 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a7";
+			reg = <0x1>;
+		};
+	};
+
+	uart_clk: dummy26m {
+		compatible = "fixed-clock";
+		clock-frequency = <26000000>;
+		#clock-cells = <0>;
+	};
+
+	system_clk: dummy13m {
+		compatible = "fixed-clock";
+		clock-frequency = <13000000>;
+		#clock-cells = <0>;
+	};
+
+	rtc_clk: dummy32k {
+		compatible = "fixed-clock";
+		clock-frequency = <32000>;
+		#clock-cells = <0>;
+	};
+
+	soc {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "simple-bus";
+		ranges;
+
+		watchdog: watchdog@10007000 {
+			compatible = "mediatek,mt6572-wdt", "mediatek,mt6589-wdt";
+			reg = <0x10007000 0x100>;
+			interrupts = <GIC_SPI 126 IRQ_TYPE_LEVEL_LOW>;
+			timeout-sec = <15>;
+			#reset-cells = <1>;
+		};
+
+		timer: timer@10008000 {
+			compatible = "mediatek,mt6572-timer", "mediatek,mt6577-timer";
+			reg = <0x10008000 0x80>;
+			interrupts = <GIC_SPI 74 IRQ_TYPE_LEVEL_LOW>;
+			clocks = <&system_clk>, <&rtc_clk>;
+			clock-names = "system-clk", "rtc-clk";
+		};
+
+		sysirq: interrupt-controller@10200100 {
+			compatible = "mediatek,mt6572-sysirq", "mediatek,mt6577-sysirq";
+			reg = <0x10200100 0x1c>;
+			interrupt-controller;
+			#interrupt-cells = <3>;
+			interrupt-parent = <&gic>;
+		};
+
+		gic: interrupt-controller@10211000 {
+			compatible = "arm,cortex-a7-gic";
+			reg = <0x10211000 0x1000>,
+			      <0x10212000 0x2000>,
+			      <0x10214000 0x2000>,
+			      <0x10216000 0x2000>;
+			interrupt-controller;
+			#interrupt-cells = <3>;
+			interrupt-parent = <&gic>;
+		};
+
+		uart0: serial@11005000 {
+			compatible = "mediatek,mt6572-uart", "mediatek,mt6577-uart";
+			reg = <0x11005000 0x400>;
+			interrupts = <GIC_SPI 31 IRQ_TYPE_LEVEL_LOW>;
+			clocks = <&uart_clk>;
+			clock-names = "baud";
+			status = "disabled";
+		};
+
+		uart1: serial@11006000 {
+			compatible = "mediatek,mt6572-uart", "mediatek,mt6577-uart";
+			reg = <0x11006000 0x400>;
+			interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_LOW>;
+			clocks = <&uart_clk>;
+			clock-names = "baud";
+			status = "disabled";
+		};
+	};
+};