arch/arm/mach-mxs/pm.c

   1 /*
   2  * Copyright (C) 2010 Freescale Semiconductor, Inc.
   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 as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #include <linux/kernel.h>
  16 #include <linux/suspend.h>
  17 #include <linux/io.h>
  18 #include <mach/system.h>
  19
  20 static int mxs_suspend_enter(suspend_state_t state)
  21 {
  22         switch (state) {
  23         case PM_SUSPEND_MEM:
  24                 arch_idle();
  25                 break;
  26
  27         default:
  28                 return -EINVAL;
  29         }
  30         return 0;
  31 }
  32
  33 static struct platform_suspend_ops mxs_suspend_ops = {
  34         .enter = mxs_suspend_enter,
  35         .valid = suspend_valid_only_mem,
  36 };
  37
  38 static int __init mxs_pm_init(void)
  39 {
  40         suspend_set_ops(&mxs_suspend_ops);
  41         return 0;
  42 }
  43 device_initcall(mxs_pm_init);