arch/arm/mach-shmobile/suspend.c

   1 /*
   2  * Suspend-to-RAM support code for SH-Mobile ARM
   3  *
   4  *  Copyright (C) 2011 Magnus Damm
   5  *
   6  * This file is subject to the terms and conditions of the GNU General Public
   7  * License.  See the file "COPYING" in the main directory of this archive
   8  * for more details.
   9  */
  10
  11 #include <linux/pm.h>
  12 #include <linux/suspend.h>
  13 #include <linux/module.h>
  14 #include <linux/err.h>
  15 #include <asm/system.h>
  16 #include <asm/io.h>
  17
  18 static int shmobile_suspend_default_enter(suspend_state_t suspend_state)
  19 {
  20         cpu_do_idle();
  21         return 0;
  22 }
  23
  24 static int shmobile_suspend_begin(suspend_state_t state)
  25 {
  26         disable_hlt();
  27         return 0;
  28 }
  29
  30 static void shmobile_suspend_end(void)
  31 {
  32         enable_hlt();
  33 }
  34
  35 struct platform_suspend_ops shmobile_suspend_ops = {
  36         .begin          = shmobile_suspend_begin,
  37         .end            = shmobile_suspend_end,
  38         .enter          = shmobile_suspend_default_enter,
  39         .valid          = suspend_valid_only_mem,
  40 };
  41
  42 static int __init shmobile_suspend_init(void)
  43 {
  44         suspend_set_ops(&shmobile_suspend_ops);
  45         return 0;
  46 }
  47 late_initcall(shmobile_suspend_init);