arch/arm/mach-spear/restart.c

   1 /*
   2  * arch/arm/plat-spear/restart.c
   3  *
   4  * SPEAr platform specific restart functions
   5  *
   6  * Copyright (C) 2009 ST Microelectronics
   7  * Viresh Kumar <vireshk@kernel.org>
   8  *
   9  * This file is licensed under the terms of the GNU General Public
  10  * License version 2. This program is licensed "as is" without any
  11  * warranty of any kind, whether express or implied.
  12  */
  13 #include <linux/io.h>
  14 #include <linux/amba/sp810.h>
  15 #include <linux/reboot.h>
  16 #include <asm/system_misc.h>
  17 #include <mach/spear.h>
  18 #include "generic.h"
  19
  20 #define SPEAR13XX_SYS_SW_RES                    (VA_MISC_BASE + 0x204)
  21 void spear_restart(enum reboot_mode mode, const char *cmd)
  22 {
  23         if (mode == REBOOT_SOFT) {
  24                 /* software reset, Jump into ROM at address 0 */
  25                 soft_restart(0);
  26         } else {
  27                 /* hardware reset, Use on-chip reset capability */
  28 #ifdef CONFIG_ARCH_SPEAR13XX
  29                 writel_relaxed(0x01, SPEAR13XX_SYS_SW_RES);
  30 #endif
  31 #if defined(CONFIG_ARCH_SPEAR3XX) || defined(CONFIG_ARCH_SPEAR6XX)
  32                 sysctl_soft_reset((void __iomem *)VA_SPEAR_SYS_CTRL_BASE);
  33 #endif
  34         }
  35 }