drivers/watchdog/bfin_wdt.c

   1 /*
   2  * watchdog.c - driver for Blackfin on-chip watchdog
   3  *
   4  * Copyright (c) 2007-2009 Analog Devices Inc.
   5  *
   6  * Licensed under the GPL-2 or later.
   7  */
   8
   9 #include <common.h>
  10 #include <watchdog.h>
  11 #include <asm/blackfin.h>
  12 #include <asm/clock.h>
  13 #include <asm/mach-common/bits/watchdog.h>
  14
  15 void hw_watchdog_reset(void)
  16 {
  17         bfin_write_WDOG_STAT(0);
  18 }
  19
  20 void hw_watchdog_init(void)
  21 {
  22         bfin_write_WDOG_CTL(WDDIS);
  23         SSYNC();
  24         bfin_write_WDOG_CNT(CONFIG_WATCHDOG_TIMEOUT_MSECS / 1000 * get_sclk());
  25         hw_watchdog_reset();
  26         bfin_write_WDOG_CTL(WDEN);
  27 }