arch/arm/mach-spear/restart.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * arch/arm/plat-spear/restart.c
   4  *
   5  * SPEAr platform specific restart functions
   6  *
   7  * Copyright (C) 2009 ST Microelectronics
   8  * Viresh Kumar <vireshk@kernel.org>
   9  */
  10 #include <linux/io.h>
  11 #include <linux/amba/sp810.h>
  12 #include <linux/reboot.h>
  13 #include <asm/system_misc.h>
  14 #include "spear.h"
  15 #include "generic.h"
  16
  17 #define SPEAR13XX_SYS_SW_RES                    (VA_MISC_BASE + 0x204)
  18 void spear_restart(enum reboot_mode mode, const char *cmd)
  19 {
  20         if (mode == REBOOT_SOFT) {
  21                 /* software reset, Jump into ROM at address 0 */
  22                 soft_restart(0);
  23         } else {
  24                 /* hardware reset, Use on-chip reset capability */
  25 #ifdef CONFIG_ARCH_SPEAR13XX
  26                 writel_relaxed(0x01, SPEAR13XX_SYS_SW_RES);
  27 #endif
  28 #if defined(CONFIG_ARCH_SPEAR3XX) || defined(CONFIG_ARCH_SPEAR6XX)
  29                 sysctl_soft_reset((void __iomem *)VA_SPEAR_SYS_CTRL_BASE);
  30 #endif
  31         }
  32 }