2 * Copyright (C) 2012 Samsung Electronics
3 * Minkyu Kang <mk7.kang@samsung.com>
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (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.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26 #include <asm/arch/watchdog.h>
28 #define PRESCALER_VAL 255
32 struct s5p_watchdog *wdt =
33 (struct s5p_watchdog *)samsung_get_base_watchdog();
36 wtcon = readl(&wdt->wtcon);
37 wtcon &= ~(WTCON_EN | WTCON_INT | WTCON_RESET);
39 writel(wtcon, &wdt->wtcon);
42 void wdt_start(unsigned int timeout)
44 struct s5p_watchdog *wdt =
45 (struct s5p_watchdog *)samsung_get_base_watchdog();
50 wtcon = readl(&wdt->wtcon);
51 wtcon |= (WTCON_EN | WTCON_CLK(WTCON_CLK_128));
54 wtcon |= WTCON_PRESCALER(PRESCALER_VAL);
56 writel(timeout, &wdt->wtdat);
57 writel(timeout, &wdt->wtcnt);
58 writel(wtcon, &wdt->wtcon);