2 * Copyright (C) 1999 ARM Limited
3 * Copyright (C) 2000 Deep Blue Solutions Ltd
4 * Copyright 2006-2007 Freescale Semiconductor, Inc. All Rights Reserved.
5 * Copyright 2008 Juergen Beisert, kernel@pengutronix.de
6 * Copyright 2009 Ilya Yanok, Emcraft Systems Ltd, yanok@emcraft.com
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
19 #include <linux/kernel.h>
20 #include <linux/clk.h>
22 #include <linux/err.h>
23 #include <linux/delay.h>
25 #include <mach/hardware.h>
26 #include <mach/common.h>
27 #include <asm/system_misc.h>
28 #include <asm/proc-fns.h>
29 #include <asm/mach-types.h>
31 static void __iomem *wdog_base;
34 * Reset the system. It is called by machine_restart().
36 void mxc_restart(char mode, const char *cmd)
38 unsigned int wcr_enable;
41 wcr_enable = (1 << 0);
45 clk = clk_get_sys("imx2-wdt.0", NULL);
47 clk_prepare_enable(clk);
48 wcr_enable = (1 << 2);
51 /* Assert SRS signal */
52 __raw_writew(wcr_enable, wdog_base);
54 /* wait for reset to assert... */
57 printk(KERN_ERR "Watchdog reset failed to assert reset\n");
59 /* delay to allow the serial port to show the message */
62 /* we'll take a jump through zero as a poor second */
66 void mxc_arch_reset_init(void __iomem *base)