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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 14 15 #include <linux/cpufreq.h> 16 #include <linux/init.h> 17 #include <linux/module.h> 18 19 static void cpufreq_gov_powersave_limits(struct cpufreq_policy *policy) 20 { 21 pr_debug("setting to %u kHz\n", policy->min); 22 __cpufreq_driver_target(policy, policy->min, CPUFREQ_RELATION_L); 23 } 24 25 static struct cpufreq_governor cpufreq_gov_powersave = { 26 .name = "powersave", 27 .limits = cpufreq_gov_powersave_limits, 28 .owner = THIS_MODULE, 29 }; 30 31 static int __init cpufreq_gov_powersave_init(void) 32 { 33 return cpufreq_register_governor(&cpufreq_gov_powersave); 34 } 35 36 static void __exit cpufreq_gov_powersave_exit(void) 37 { 38 cpufreq_unregister_governor(&cpufreq_gov_powersave); 39 } 40 41 MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>"); 42 MODULE_DESCRIPTION("CPUfreq policy governor 'powersave'"); 43 MODULE_LICENSE("GPL"); 44 45 #ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE 46 struct cpufreq_governor *cpufreq_default_governor(void) 47 { 48 return &cpufreq_gov_powersave; 49 } 50 51 fs_initcall(cpufreq_gov_powersave_init); 52 #else 53 module_init(cpufreq_gov_powersave_init); 54 #endif 55 module_exit(cpufreq_gov_powersave_exit); 56