arch/arm/boot/dts/intel/ixp/intel-ixp42x-ixdpg425.dts

Source file repositories/reference/linux-study-clean/arch/arm/boot/dts/intel/ixp/intel-ixp42x-ixdpg425.dts

File Facts

System
Linux kernel
Corpus path
arch/arm/boot/dts/intel/ixp/intel-ixp42x-ixdpg425.dts
Extension
.dts
Size
3282 bytes
Lines
128
Domain
Architecture Layer
Bucket
arch/arm
Inferred role
Architecture Layer: configuration, schema, or hardware description
Status
atlas-only

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: ISC
/*
 * Device Tree file for the Intel IXDPG425 reference design.
 * Derived from boardfiles written by MontaVista software.
 * Ethernet set-up from OpenWrt.
 *
 * The device has 4 x FXS RJ11 ports for analog phones for
 * internet telephony. (Not supported yet.)
 *
 * The device has 9 status LEDs we do not support yet.
 *
 * This device is very similar to ADI engingeering Coyote.
 */

/dts-v1/;

#include "intel-ixp42x.dtsi"
#include <dt-bindings/input/input.h>

/ {
	model = "Intel IXDPG425 reference design";
	compatible = "intel,ixdpg425", "intel,ixp42x";
	#address-cells = <1>;
	#size-cells = <1>;

	memory@0 {
		/* 32 MB SDRAM */
		device_type = "memory";
		reg = <0x00000000 0x02000000>;
	};

	chosen {
		bootargs = "console=ttyS0,115200n8 root=/dev/sda1 rw rootwait";
		stdout-path = "uart0:115200n8";
	};

	aliases {
		serial0 = &uart0;
	};

	soc {
		bus@c4000000 {
			flash@0,0 {
				compatible = "intel,ixp4xx-flash", "cfi-flash";
				bank-width = <2>;
				/*
				 * CHECKME: the product brief says 16MB in a flash
				 * socket.
				 */
				reg = <0 0x00000000 0x1000000>;

				/* Configure expansion bus to allow writes */
				intel,ixp4xx-eb-write-enable = <1>;

				partitions {
					compatible = "redboot-fis";
					/* CHECKME: guess this is Redboot FIS */
					fis-index-block = <0x7f>;
				};
			};
		};

		pci@c0000000 {
			status = "okay";

			/*
			 * Taken from IXDPG425 PCI boardfile.
			 * We have slots (IDSEL) 12, 13 and 14 with one assigned IRQ
			 * for 12 & 13 and one for 14.
			 */

Annotation

Implementation Notes