mirror of
https://github.com/AsahiLinux/u-boot
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60 lines
1.6 KiB
C
60 lines
1.6 KiB
C
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/*
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* Copyright (C) 2012 Samsung Electronics
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* Minkyu Kang <mk7.kang@samsung.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <asm/arch/watchdog.h>
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#define PRESCALER_VAL 255
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void wdt_stop(void)
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{
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struct s5p_watchdog *wdt =
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(struct s5p_watchdog *)samsung_get_base_watchdog();
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unsigned int wtcon;
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wtcon = readl(&wdt->wtcon);
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wtcon &= ~(WTCON_EN | WTCON_INT | WTCON_RESET);
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writel(wtcon, &wdt->wtcon);
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}
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void wdt_start(unsigned int timeout)
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{
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struct s5p_watchdog *wdt =
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(struct s5p_watchdog *)samsung_get_base_watchdog();
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unsigned int wtcon;
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wdt_stop();
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wtcon = readl(&wdt->wtcon);
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wtcon |= (WTCON_EN | WTCON_CLK(WTCON_CLK_128));
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wtcon &= ~WTCON_INT;
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wtcon |= WTCON_RESET;
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wtcon |= WTCON_PRESCALER(PRESCALER_VAL);
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writel(timeout, &wdt->wtdat);
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writel(timeout, &wdt->wtcnt);
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writel(wtcon, &wdt->wtcon);
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}
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