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 #include <linux/reboot.h>
  10
  11 #include "common.h"
  12 #include "prm-regbits-33xx.h"
  13 #include "prm33xx.h"
  14
  15 /**
  16  * am3xx_restart - trigger a software restart of the SoC
  17  * @mode: the "reboot mode", see arch/arm/kernel/{setup,process}.c
  18  * @cmd: passed from the userspace program rebooting the system (if provided)
  19  *
  20  * Resets the SoC.  For @cmd, see the 'reboot' syscall in
  21  * kernel/sys.c.  No return value.
  22  */
  23 void am33xx_restart(enum reboot_mode mode, const char *cmd)
  24 {
  25         /* TODO: Handle mode and cmd if necessary */
  26
  27         am33xx_prm_rmw_reg_bits(AM33XX_RST_GLOBAL_WARM_SW_MASK,
  28                                 AM33XX_RST_GLOBAL_WARM_SW_MASK,
  29                                 AM33XX_PRM_DEVICE_MOD,
  30                                 AM33XX_PRM_RSTCTRL_OFFSET);
  31
  32         /* OCP barrier */
  33         (void)am33xx_prm_read_reg(AM33XX_PRM_DEVICE_MOD,
  34                                   AM33XX_PRM_RSTCTRL_OFFSET);
  35 }