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 #include "common.h"
  21
  22 static int shmobile_suspend_default_enter(suspend_state_t suspend_state)
  23 {
  24         cpu_do_idle();
  25         return 0;
  26 }
  27
  28 static int shmobile_suspend_begin(suspend_state_t state)
  29 {
  30         cpu_idle_poll_ctrl(true);
  31         return 0;
  32 }
  33
  34 static void shmobile_suspend_end(void)
  35 {
  36         cpu_idle_poll_ctrl(false);
  37 }
  38
  39 struct platform_suspend_ops shmobile_suspend_ops = {
  40         .begin          = shmobile_suspend_begin,
  41         .end            = shmobile_suspend_end,
  42         .enter          = shmobile_suspend_default_enter,
  43         .valid          = suspend_valid_only_mem,
  44 };
  45
  46 int __init shmobile_suspend_init(void)
  47 {
  48         suspend_set_ops(&shmobile_suspend_ops);
  49         return 0;
  50 }