u-boot/arch/arc/dts/emdk.dts

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2018 Synopsys, Inc. All rights reserved.
 */
/dts-v1/;

#include "skeleton.dtsi"

/ {
	#address-cells = <1>;
	#size-cells = <1>;

	aliases {
		console = &uart0;
	};

	cpu_card {
		core_clk: core_clk {
			#clock-cells = <0>;
			compatible = "fixed-clock";
			clock-frequency = <40000000>;
			u-boot,dm-pre-reloc;
		};
	};

	uart0: serial0@f0004000 {
		compatible = "snps,dw-apb-uart";
		clock-frequency = <100000000>;
		reg = <0xf0004000 0x1000>;
		reg-shift = <2>;
		reg-io-width = <4>;
	};
};