arch/mips/ralink/reset.c

Source file repositories/reference/linux-study-clean/arch/mips/ralink/reset.c

File Facts

System
Linux kernel
Corpus path
arch/mips/ralink/reset.c
Extension
.c
Size
878 bytes
Lines
44
Domain
Architecture Layer
Bucket
arch/mips
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

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-only
/*
 *
 * Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
 * Copyright (C) 2013 John Crispin <john@phrozen.org>
 */

#include <linux/pm.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/delay.h>

#include <asm/reboot.h>

#include <asm/mach-ralink/ralink_regs.h>

/* Reset Control */
#define SYSC_REG_RESET_CTRL	0x034

#define RSTCTL_RESET_PCI	BIT(26)
#define RSTCTL_RESET_SYSTEM	BIT(0)

static void ralink_restart(char *command)
{
	if (IS_ENABLED(CONFIG_PCI)) {
		rt_sysc_m32(0, RSTCTL_RESET_PCI, SYSC_REG_RESET_CTRL);
		mdelay(50);
	}

	local_irq_disable();
	rt_sysc_w32(RSTCTL_RESET_SYSTEM, SYSC_REG_RESET_CTRL);
	unreachable();
}

static int __init mips_reboot_setup(void)
{
	_machine_restart = ralink_restart;

	return 0;
}

arch_initcall(mips_reboot_setup);

Annotation

Implementation Notes