drivers/cpufreq/cpufreq_powersave.c

   1 /*
   2  *  linux/drivers/cpufreq/cpufreq_powersave.c
   3  *
   4  *  Copyright (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
   5  *
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  *
  11  */
  12
  13 #include <linux/kernel.h>
  14 #include <linux/module.h>
  15 #include <linux/cpufreq.h>
  16 #include <linux/init.h>
  17
  18 static int cpufreq_governor_powersave(struct cpufreq_policy *policy,
  19                                         unsigned int event)
  20 {
  21         switch (event) {
  22         case CPUFREQ_GOV_START:
  23         case CPUFREQ_GOV_LIMITS:
  24                 __cpufreq_driver_target(policy, policy->min, CPUFREQ_RELATION_L);
  25                 break;
  26         default:
  27                 break;
  28         }
  29         return 0;
  30 }
  31
  32 static struct cpufreq_governor cpufreq_gov_powersave = {
  33         .name           = "powersave",
  34         .governor       = cpufreq_governor_powersave,
  35         .owner          = THIS_MODULE,
  36 };
  37
  38
  39 static int __init cpufreq_gov_powersave_init(void)
  40 {
  41         return cpufreq_register_governor(&cpufreq_gov_powersave);
  42 }
  43
  44
  45 static void __exit cpufreq_gov_powersave_exit(void)
  46 {
  47         cpufreq_unregister_governor(&cpufreq_gov_powersave);
  48 }
  49
  50
  51 MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
  52 MODULE_DESCRIPTION("CPUfreq policy governor 'powersave'");
  53 MODULE_LICENSE("GPL");
  54
  55 module_init(cpufreq_gov_powersave_init);
  56 module_exit(cpufreq_gov_powersave_exit);