forked from luck/tmp_suning_uos_patched
7b6d864b48
Preparing to move the parsing of reboot= to generic kernel code forces the change in reboot_mode handling to use the enum. [akpm@linux-foundation.org: fix arch/arm/mach-socfpga/socfpga.c] Signed-off-by: Robin Holt <holt@sgi.com> Cc: Russell King <rmk+kernel@arm.linux.org.uk> Cc: Russ Anderson <rja@sgi.com> Cc: Robin Holt <holt@sgi.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Guan Xuetao <gxt@mprc.pku.edu.cn> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
98 lines
2.3 KiB
C
98 lines
2.3 KiB
C
/*
|
|
* 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.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/io.h>
|
|
#include <linux/err.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_address.h>
|
|
|
|
#include <asm/system_misc.h>
|
|
#include <asm/proc-fns.h>
|
|
#include <asm/mach-types.h>
|
|
|
|
#include "common.h"
|
|
#include "hardware.h"
|
|
|
|
static void __iomem *wdog_base;
|
|
static struct clk *wdog_clk;
|
|
|
|
/*
|
|
* Reset the system. It is called by machine_restart().
|
|
*/
|
|
void mxc_restart(enum reboot_mode mode, const char *cmd)
|
|
{
|
|
unsigned int wcr_enable;
|
|
|
|
if (wdog_clk)
|
|
clk_enable(wdog_clk);
|
|
|
|
if (cpu_is_mx1())
|
|
wcr_enable = (1 << 0);
|
|
else
|
|
wcr_enable = (1 << 2);
|
|
|
|
/* Assert SRS signal */
|
|
__raw_writew(wcr_enable, wdog_base);
|
|
|
|
/* wait for reset to assert... */
|
|
mdelay(500);
|
|
|
|
pr_err("%s: Watchdog reset failed to assert reset\n", __func__);
|
|
|
|
/* delay to allow the serial port to show the message */
|
|
mdelay(50);
|
|
|
|
/* we'll take a jump through zero as a poor second */
|
|
soft_restart(0);
|
|
}
|
|
|
|
void __init mxc_arch_reset_init(void __iomem *base)
|
|
{
|
|
wdog_base = base;
|
|
|
|
wdog_clk = clk_get_sys("imx2-wdt.0", NULL);
|
|
if (IS_ERR(wdog_clk)) {
|
|
pr_warn("%s: failed to get wdog clock\n", __func__);
|
|
wdog_clk = NULL;
|
|
return;
|
|
}
|
|
|
|
clk_prepare(wdog_clk);
|
|
}
|
|
|
|
void __init mxc_arch_reset_init_dt(void)
|
|
{
|
|
struct device_node *np;
|
|
|
|
np = of_find_compatible_node(NULL, NULL, "fsl,imx21-wdt");
|
|
wdog_base = of_iomap(np, 0);
|
|
WARN_ON(!wdog_base);
|
|
|
|
wdog_clk = of_clk_get(np, 0);
|
|
if (IS_ERR(wdog_clk)) {
|
|
pr_warn("%s: failed to get wdog clock\n", __func__);
|
|
wdog_clk = NULL;
|
|
return;
|
|
}
|
|
|
|
clk_prepare(wdog_clk);
|
|
}
|