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Linux/arch/arm/mach-spear/restart.c

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  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 <viresh.linux@gmail.com>
  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 <asm/system_misc.h>
 16 #include <mach/spear.h>
 17 #include "generic.h"
 18 
 19 #define SPEAR13XX_SYS_SW_RES                    (VA_MISC_BASE + 0x204)
 20 void spear_restart(char mode, const char *cmd)
 21 {
 22         if (mode == 's') {
 23                 /* software reset, Jump into ROM at address 0 */
 24                 soft_restart(0);
 25         } else {
 26                 /* hardware reset, Use on-chip reset capability */
 27 #ifdef CONFIG_ARCH_SPEAR13XX
 28                 writel_relaxed(0x01, SPEAR13XX_SYS_SW_RES);
 29 #endif
 30 #if defined(CONFIG_ARCH_SPEAR3XX) || defined(CONFIG_ARCH_SPEAR6XX)
 31                 sysctl_soft_reset((void __iomem *)VA_SPEAR_SYS_CTRL_BASE);
 32 #endif
 33         }
 34 }
 35 

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