1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * linux/drivers/cpufreq/cpufreq_powersave.c 4 * 5 * Copyright (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de> 6 */ 7 8 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 9 10 #include <linux/cpufreq.h> 11 #include <linux/init.h> 12 #include <linux/module.h> 13 14 static void cpufreq_gov_powersave_limits(struct cpufreq_policy *policy) 15 { 16 pr_debug("setting to %u kHz\n", policy->min); 17 __cpufreq_driver_target(policy, policy->min, CPUFREQ_RELATION_L); 18 } 19 20 static struct cpufreq_governor cpufreq_gov_powersave = { 21 .name = "powersave", 22 .limits = cpufreq_gov_powersave_limits, 23 .owner = THIS_MODULE, 24 }; 25 26 static int __init cpufreq_gov_powersave_init(void) 27 { 28 return cpufreq_register_governor(&cpufreq_gov_powersave); 29 } 30 31 static void __exit cpufreq_gov_powersave_exit(void) 32 { 33 cpufreq_unregister_governor(&cpufreq_gov_powersave); 34 } 35 36 MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>"); 37 MODULE_DESCRIPTION("CPUfreq policy governor 'powersave'"); 38 MODULE_LICENSE("GPL"); 39 40 #ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE 41 struct cpufreq_governor *cpufreq_default_governor(void) 42 { 43 return &cpufreq_gov_powersave; 44 } 45 46 core_initcall(cpufreq_gov_powersave_init); 47 #else 48 module_init(cpufreq_gov_powersave_init); 49 #endif 50 module_exit(cpufreq_gov_powersave_exit); 51