arch/arm/boot/dts/marvell/armada-xp-db.dts

Source file repositories/reference/linux-study-clean/arch/arm/boot/dts/marvell/armada-xp-db.dts

File Facts

System
Linux kernel
Corpus path
arch/arm/boot/dts/marvell/armada-xp-db.dts
Extension
.dts
Size
4737 bytes
Lines
246
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: (GPL-2.0+ OR MIT)
/*
 * Device Tree file for Marvell Armada XP evaluation board
 * (DB-78460-BP)
 *
 * Copyright (C) 2012-2014 Marvell
 *
 * Lior Amsalem <alior@marvell.com>
 * Gregory CLEMENT <gregory.clement@free-electrons.com>
 * Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
 *
  *
 * Note: this Device Tree assumes that the bootloader has remapped the
 * internal registers to 0xf1000000 (instead of the default
 * 0xd0000000). The 0xf1000000 is the default used by the recent,
 * DT-capable, U-Boot bootloaders provided by Marvell. Some earlier
 * boards were delivered with an older version of the bootloader that
 * left internal registers mapped at 0xd0000000. If you are in this
 * situation, you should either update your bootloader (preferred
 * solution) or the below Device Tree should be adjusted.
 */

/dts-v1/;
#include "armada-xp-mv78460.dtsi"

/ {
	model = "Marvell Armada XP Evaluation Board";
	compatible = "marvell,axp-db", "marvell,armadaxp-mv78460", "marvell,armadaxp", "marvell,armada-370-xp";

	chosen {
		stdout-path = "serial0:115200n8";
	};

	memory@0 {
		device_type = "memory";
		reg = <0 0x00000000 0 0x80000000>; /* 2 GB */
	};

	soc {
		ranges = <MBUS_ID(0xf0, 0x01) 0 0 0xf1000000 0x100000
			  MBUS_ID(0x01, 0x1d) 0 0 0xfff00000 0x100000
			  MBUS_ID(0x01, 0x2f) 0 0 0xf0000000 0x1000000
			  MBUS_ID(0x09, 0x09) 0 0 0xf1100000 0x10000
			  MBUS_ID(0x09, 0x05) 0 0 0xf1110000 0x10000
			  MBUS_ID(0x0c, 0x04) 0 0 0xf1200000 0x100000>;

		devbus-bootcs {
			status = "okay";

			/* Device Bus parameters are required */

			/* Read parameters */
			devbus,bus-width    = <16>;
			devbus,turn-off-ps  = <60000>;
			devbus,badr-skew-ps = <0>;
			devbus,acc-first-ps = <124000>;
			devbus,acc-next-ps  = <248000>;
			devbus,rd-setup-ps  = <0>;
			devbus,rd-hold-ps   = <0>;

			/* Write parameters */
			devbus,sync-enable = <0>;
			devbus,wr-high-ps  = <60000>;
			devbus,wr-low-ps   = <60000>;
			devbus,ale-wr-ps   = <60000>;

			/* NOR 16 MiB */
			nor@0 {
				compatible = "cfi-flash";
				reg = <0 0x1000000>;

Annotation

Implementation Notes