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...) \
  19         cpufreq_debug_printk(CPUFREQ_DEBUG_GOVERNOR, "performance", msg)
  20
  21
  22 static int cpufreq_governor_performance(struct cpufreq_policy *policy,
  23                                         unsigned int event)
  24 {
  25         switch (event) {
  26         case CPUFREQ_GOV_START:
  27         case CPUFREQ_GOV_LIMITS:
  28                 dprintk("setting to %u kHz because of event %u\n",
  29                                                 policy->max, event);
  30                 __cpufreq_driver_target(policy, policy->max,
  31                                                 CPUFREQ_RELATION_H);
  32                 break;
  33         default:
  34                 break;
  35         }
  36         return 0;
  37 }
  38
  39 #ifdef CONFIG_CPU_FREQ_GOV_PERFORMANCE_MODULE
  40 static
  41 #endif
  42 struct cpufreq_governor cpufreq_gov_performance = {
  43         .name           = "performance",
  44         .governor       = cpufreq_governor_performance,
  45         .owner          = THIS_MODULE,
  46 };
  47
  48
  49 static int __init cpufreq_gov_performance_init(void)
  50 {
  51         return cpufreq_register_governor(&cpufreq_gov_performance);
  52 }
  53
  54
  55 static void __exit cpufreq_gov_performance_exit(void)
  56 {
  57         cpufreq_unregister_governor(&cpufreq_gov_performance);
  58 }
  59
  60
  61 MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
  62 MODULE_DESCRIPTION("CPUfreq policy governor 'performance'");
  63 MODULE_LICENSE("GPL");
  64
  65 fs_initcall(cpufreq_gov_performance_init);
  66 module_exit(cpufreq_gov_performance_exit);