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/*
* Copyright (C) 1999 ARM Limited
* Copyright (C) 2000 Deep Blue Solutions Ltd
* Copyright 2006-2007 Freescale Semiconductor, Inc. All Rights Reserved.
* Copyright 2008 Juergen Beisert, kernel@pengutronix.de
* Copyright 2009 Ilya Yanok, Emcraft Systems Ltd, yanok@emcraft.com
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/kernel.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/err.h>
#include <linux/delay.h>
#include <mach/hardware.h>
#include <asm/proc-fns.h>
#include <asm/system.h>
#ifdef CONFIG_ARCH_MX1
#define WDOG_WCR_REG IO_ADDRESS(WDT_BASE_ADDR)
#define WDOG_WCR_ENABLE (1 << 0)
#else
#define WDOG_WCR_REG IO_ADDRESS(WDOG_BASE_ADDR)
#define WDOG_WCR_ENABLE (1 << 2)
#endif
/*
* Reset the system. It is called by machine_restart().
*/
void arch_reset(char mode, const char *cmd)
{
if (!cpu_is_mx1()) {
struct clk *clk;
clk = clk_get_sys("imx-wdt.0", NULL);
if (!IS_ERR(clk))
clk_enable(clk);
}
/* Assert SRS signal */
__raw_writew(WDOG_WCR_ENABLE, WDOG_WCR_REG);
/* wait for reset to assert... */
mdelay(500);
printk(KERN_ERR "Watchdog reset failed to assert reset\n");
/* delay to allow the serial port to show the message */
mdelay(50);
/* we'll take a jump through zero as a poor second */
cpu_reset(0);
}
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