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https://github.com/AsahiLinux/u-boot
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43 lines
880 B
C
43 lines
880 B
C
/*
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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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* SPDX-License-Identifier: GPL-2.0+
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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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