drivers/cpufreq/cpufreq_performance.c

   1 /*
   2  *  linux/drivers/cpufreq/cpufreq_performance.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 #define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_GOVERNOR, "performance", msg)
  19
  20
  21 static int cpufreq_governor_performance(struct cpufreq_policy *policy,
  22                                         unsigned int event)
  23 {
  24         switch (event) {
  25         case CPUFREQ_GOV_START:
  26         case CPUFREQ_GOV_LIMITS:
  27                 dprintk("setting to %u kHz because of event %u\n", policy->max, event);
  28                 __cpufreq_driver_target(policy, policy->max, CPUFREQ_RELATION_H);
  29                 break;
  30         default:
  31                 break;
  32         }
  33         return 0;
  34 }
  35
  36 struct cpufreq_governor cpufreq_gov_performance = {
  37         .name           = "performance",
  38         .governor       = cpufreq_governor_performance,
  39         .owner          = THIS_MODULE,
  40 };
  41 EXPORT_SYMBOL(cpufreq_gov_performance);
  42
  43
  44 static int __init cpufreq_gov_performance_init(void)
  45 {
  46         return cpufreq_register_governor(&cpufreq_gov_performance);
  47 }
  48
  49
  50 static void __exit cpufreq_gov_performance_exit(void)
  51 {
  52         cpufreq_unregister_governor(&cpufreq_gov_performance);
  53 }
  54
  55
  56 MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
  57 MODULE_DESCRIPTION("CPUfreq policy governor 'performance'");
  58 MODULE_LICENSE("GPL");
  59
  60 fs_initcall(cpufreq_gov_performance_init);
  61 module_exit(cpufreq_gov_performance_exit);