arch/arm/mach-imx/cpuidle-imx5.c

   1 /*
   2  * Copyright (C) 2012 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 version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8
   9 #include <linux/cpuidle.h>
  10 #include <linux/module.h>
  11 #include <asm/system_misc.h>
  12
  13 static int imx5_cpuidle_enter(struct cpuidle_device *dev,
  14                               struct cpuidle_driver *drv, int index)
  15 {
  16         arm_pm_idle();
  17         return index;
  18 }
  19
  20 static struct cpuidle_driver imx5_cpuidle_driver = {
  21         .name             = "imx5_cpuidle",
  22         .owner            = THIS_MODULE,
  23         .states[0] = {
  24                 .enter            = imx5_cpuidle_enter,
  25                 .exit_latency     = 2,
  26                 .target_residency = 1,
  27                 .flags            = CPUIDLE_FLAG_TIME_VALID,
  28                 .name             = "IMX5 SRPG",
  29                 .desc             = "CPU state retained,powered off",
  30         },
  31         .state_count = 1,
  32 };
  33
  34 int __init imx5_cpuidle_init(void)
  35 {
  36         return cpuidle_register(&imx5_cpuidle_driver, NULL);
  37 }