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/*
* Copyright (C) 2012 Samsung Electronics
* Minkyu Kang <mk7.kang@samsung.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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 <common.h>
#include <asm/io.h>
#include <asm/arch/watchdog.h>
#define PRESCALER_VAL 255
void wdt_stop(void)
{
struct s5p_watchdog *wdt =
(struct s5p_watchdog *)samsung_get_base_watchdog();
unsigned int wtcon;
wtcon = readl(&wdt->wtcon);
wtcon &= ~(WTCON_EN | WTCON_INT | WTCON_RESET);
writel(wtcon, &wdt->wtcon);
}
void wdt_start(unsigned int timeout)
{
struct s5p_watchdog *wdt =
(struct s5p_watchdog *)samsung_get_base_watchdog();
unsigned int wtcon;
wdt_stop();
wtcon = readl(&wdt->wtcon);
wtcon |= (WTCON_EN | WTCON_CLK(WTCON_CLK_128));
wtcon &= ~WTCON_INT;
wtcon |= WTCON_RESET;
wtcon |= WTCON_PRESCALER(PRESCALER_VAL);
writel(timeout, &wdt->wtdat);
writel(timeout, &wdt->wtcnt);
writel(wtcon, &wdt->wtcon);
}
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