arch/arm/mach-omap2/am33xx-restart.c

   1 /*
   2  * am33xx-restart.c - Code common to all AM33xx machines.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8 #include <linux/kernel.h>
   9
  10 #include "common.h"
  11 #include "prm-regbits-33xx.h"
  12 #include "prm33xx.h"
  13
  14 /**
  15  * am3xx_restart - trigger a software restart of the SoC
  16  * @mode: the "reboot mode", see arch/arm/kernel/{setup,process}.c
  17  * @cmd: passed from the userspace program rebooting the system (if provided)
  18  *
  19  * Resets the SoC.  For @cmd, see the 'reboot' syscall in
  20  * kernel/sys.c.  No return value.
  21  */
  22 void am33xx_restart(char mode, const char *cmd)
  23 {
  24         /* TODO: Handle mode and cmd if necessary */
  25
  26         am33xx_prm_rmw_reg_bits(AM33XX_GLOBAL_WARM_SW_RST_MASK,
  27                                 AM33XX_GLOBAL_WARM_SW_RST_MASK,
  28                                 AM33XX_PRM_DEVICE_MOD,
  29                                 AM33XX_PRM_RSTCTRL_OFFSET);
  30
  31         /* OCP barrier */
  32         (void)am33xx_prm_read_reg(AM33XX_PRM_DEVICE_MOD,
  33                                   AM33XX_PRM_RSTCTRL_OFFSET);
  34 }