arch/arm/cpu/arm926ejs/mx25/reset.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2002
   4  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
   5  * Marius Groeger <mgroeger@sysgo.de>
   6  *
   7  * (C) Copyright 2002
   8  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
   9  * Alex Zuepke <azu@sysgo.de>
  10  *
  11  * (C) Copyright 2002
  12  * Gary Jennejohn, DENX Software Engineering, <gj@denx.de>
  13  *
  14  * (C) Copyright 2009
  15  * Ilya Yanok, Emcraft Systems Ltd, <yanok@emcraft.com>
  16  */
  17
  18 #include <common.h>
  19 #include <asm/io.h>
  20 #include <asm/arch/imx-regs.h>
  21
  22 /*
  23  * Reset the cpu by setting up the watchdog timer and let it time out
  24  */
  25 void reset_cpu(ulong ignored)
  26 {
  27         struct wdog_regs *regs = (struct wdog_regs *)IMX_WDT_BASE;
  28         /* Disable watchdog and set Time-Out field to 0 */
  29         writew(0, &regs->wcr);
  30
  31         /* Write Service Sequence */
  32         writew(WSR_UNLOCK1, &regs->wsr);
  33         writew(WSR_UNLOCK2, &regs->wsr);
  34
  35         /* Enable watchdog */
  36         writew(WCR_WDE, &regs->wcr);
  37
  38         while (1) ;
  39 }