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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 14 15 #include <linux/kernel.h> 16 #include <linux/module.h> 17 #include <linux/cpufreq.h> 18 #include <linux/init.h> 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 pr_debug("setting to %u kHz because of event %u\n", 28 policy->max, event); 29 __cpufreq_driver_target(policy, policy->max, 30 CPUFREQ_RELATION_H); 31 break; 32 default: 33 break; 34 } 35 return 0; 36 } 37 38 #ifdef CONFIG_CPU_FREQ_GOV_PERFORMANCE_MODULE 39 static 40 #endif 41 struct cpufreq_governor cpufreq_gov_performance = { 42 .name = "performance", 43 .governor = cpufreq_governor_performance, 44 .owner = THIS_MODULE, 45 }; 46 47 48 static int __init cpufreq_gov_performance_init(void) 49 { 50 return cpufreq_register_governor(&cpufreq_gov_performance); 51 } 52 53 54 static void __exit cpufreq_gov_performance_exit(void) 55 { 56 cpufreq_unregister_governor(&cpufreq_gov_performance); 57 } 58 59 60 MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>"); 61 MODULE_DESCRIPTION("CPUfreq policy governor 'performance'"); 62 MODULE_LICENSE("GPL"); 63 64 fs_initcall(cpufreq_gov_performance_init); 65 module_exit(cpufreq_gov_performance_exit); 66