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 <linux/cpu.h>
  16
  17 #include <asm/io.h>
  18 #include <asm/system_misc.h>
  19
  20 static int shmobile_suspend_default_enter(suspend_state_t suspend_state)
  21 {
  22         cpu_do_idle();
  23         return 0;
  24 }
  25
  26 static int shmobile_suspend_begin(suspend_state_t state)
  27 {
  28         cpu_idle_poll_ctrl(true);
  29         return 0;
  30 }
  31
  32 static void shmobile_suspend_end(void)
  33 {
  34         cpu_idle_poll_ctrl(false);
  35 }
  36
  37 struct platform_suspend_ops shmobile_suspend_ops = {
  38         .begin          = shmobile_suspend_begin,
  39         .end            = shmobile_suspend_end,
  40         .enter          = shmobile_suspend_default_enter,
  41         .valid          = suspend_valid_only_mem,
  42 };
  43
  44 int __init shmobile_suspend_init(void)
  45 {
  46         suspend_set_ops(&shmobile_suspend_ops);
  47         return 0;
  48 }