xref: /kernel/linux/linux-6.6/arch/powerpc/boot/dts/iss4xx.dts (revision 62306a36)

/*
 * Device Tree Source for IBM Embedded PPC 476 Platform
 *
 * Copyright 2010 Torez Smith, IBM Corporation.
 *
 * Based on earlier code:
 *    Copyright (c) 2006, 2007 IBM Corp.
 *    Josh Boyer <jwboyer@linux.vnet.ibm.com>, David Gibson <dwg@au1.ibm.com>
 *
 * This file is licensed under the terms of the GNU General Public
 * License version 2.  This program is licensed "as is" without
 * any warranty of any kind, whether express or implied.
 */

/dts-v1/;

/ {
	#address-cells = <2>;
	#size-cells = <1>;
	model = "ibm,iss-4xx";
	compatible = "ibm,iss-4xx";
	dcr-parent = <&{/cpus/cpu@0}>;

	aliases {
		serial0 = &UART0;
	};

	cpus {
		#address-cells = <1>;
		#size-cells = <0>;

		cpu@0 {
			device_type = "cpu";
			model = "PowerPC,4xx"; // real CPU changed in sim
			reg = <0x00000000>;
			clock-frequency = <100000000>; // 100Mhz :-)
			timebase-frequency = <100000000>;
			i-cache-line-size = <32>; // may need fixup in sim
			d-cache-line-size = <32>; // may need fixup in sim
			i-cache-size = <32768>; /* may need fixup in sim */
			d-cache-size = <32768>; /* may need fixup in sim */
			dcr-controller;
			dcr-access-method = "native";
		};
	};

	memory {
		device_type = "memory";
		reg = <0x00000000 0x00000000 0x00000000>; // Filled in by zImage
	};

	UIC0: interrupt-controller0 {
		compatible = "ibm,uic-4xx", "ibm,uic";
		interrupt-controller;
		cell-index = <0>;
		dcr-reg = <0x0c0 0x009>;
		#address-cells = <0>;
		#size-cells = <0>;
		#interrupt-cells = <2>;

	};

	UIC1: interrupt-controller1 {
		compatible = "ibm,uic-4xx", "ibm,uic";
		interrupt-controller;
		cell-index = <1>;
		dcr-reg = <0x0d0 0x009>;
		#address-cells = <0>;
		#size-cells = <0>;
		#interrupt-cells = <2>;
		interrupts = <0x1e 0x4 0x1f 0x4>; /* cascade */
		interrupt-parent = <&UIC0>;
	};

	plb {
		compatible = "ibm,plb-4xx", "ibm,plb4"; /* Could be PLB6, doesn't matter */
		#address-cells = <2>;
		#size-cells = <1>;
		ranges;
		clock-frequency = <0>; // Filled in by zImage

		POB0: opb {
			compatible = "ibm,opb-4xx", "ibm,opb";
			#address-cells = <1>;
			#size-cells = <1>;
			/* Wish there was a nicer way of specifying a full 32-bit
			   range */
			ranges = <0x00000000 0x00000001 0x00000000 0x80000000
				  0x80000000 0x00000001 0x80000000 0x80000000>;
			clock-frequency = <0>; // Filled in by zImage
			UART0: serial@40000200 {
				device_type = "serial";
				compatible = "ns16550a";
				reg = <0x40000200 0x00000008>;
				virtual-reg = <0xe0000200>;
				clock-frequency = <11059200>;
				current-speed = <115200>;
				interrupt-parent = <&UIC0>;
				interrupts = <0x0 0x4>;
			};
		};
	};

	nvrtc {
		compatible = "ds1743-nvram", "ds1743", "rtc-ds1743";
		reg = <0 0xEF703000 0x2000>;
	};
	iss-block {
		compatible = "ibm,iss-sim-block-device";
		reg = <0 0xEF701000 0x1000>;
	};

	chosen {
		stdout-path = "/plb/opb/serial@40000200";
	};
};