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drivers/cpufreq/cpufreq_powersave.c 1.38 KB
81f7e3824   Eric Lee   Initial Release, ...
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  /*
   * linux/drivers/cpufreq/cpufreq_powersave.c
   *
   * Copyright (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
   *
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 as
   * published by the Free Software Foundation.
   *
   */
  
  #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  
  #include <linux/cpufreq.h>
  #include <linux/init.h>
  #include <linux/module.h>
  
  static void cpufreq_gov_powersave_limits(struct cpufreq_policy *policy)
  {
  	pr_debug("setting to %u kHz
  ", policy->min);
  	__cpufreq_driver_target(policy, policy->min, CPUFREQ_RELATION_L);
  }
  
  static struct cpufreq_governor cpufreq_gov_powersave = {
  	.name		= "powersave",
  	.limits		= cpufreq_gov_powersave_limits,
  	.owner		= THIS_MODULE,
  };
  
  static int __init cpufreq_gov_powersave_init(void)
  {
  	return cpufreq_register_governor(&cpufreq_gov_powersave);
  }
  
  static void __exit cpufreq_gov_powersave_exit(void)
  {
  	cpufreq_unregister_governor(&cpufreq_gov_powersave);
  }
  
  MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
  MODULE_DESCRIPTION("CPUfreq policy governor 'powersave'");
  MODULE_LICENSE("GPL");
  
  #ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE
  struct cpufreq_governor *cpufreq_default_governor(void)
  {
  	return &cpufreq_gov_powersave;
  }
  
  fs_initcall(cpufreq_gov_powersave_init);
  #else
  module_init(cpufreq_gov_powersave_init);
  #endif
  module_exit(cpufreq_gov_powersave_exit);