diff options
Diffstat (limited to 'drivers/cpufreq/cpufreq_powersave.c')
| -rw-r--r-- | drivers/cpufreq/cpufreq_powersave.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/drivers/cpufreq/cpufreq_powersave.c b/drivers/cpufreq/cpufreq_powersave.c new file mode 100644 index 000000000..e3b874c23 --- /dev/null +++ b/drivers/cpufreq/cpufreq_powersave.c @@ -0,0 +1,64 @@ +/* + * linux/drivers/cpufreq/cpufreq_powersave.c + * + * Copyright (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de> + * + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/cpufreq.h> +#include <linux/init.h> +#include <linux/module.h> + +static int cpufreq_governor_powersave(struct cpufreq_policy *policy, + unsigned int event) +{ + switch (event) { + case CPUFREQ_GOV_START: + case CPUFREQ_GOV_LIMITS: + pr_debug("setting to %u kHz because of event %u\n", + policy->min, event); + __cpufreq_driver_target(policy, policy->min, + CPUFREQ_RELATION_L); + break; + default: + break; + } + return 0; +} + +#ifndef CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE +static +#endif +struct cpufreq_governor cpufreq_gov_powersave = { + .name = "powersave", + .governor = cpufreq_governor_powersave, + .owner = THIS_MODULE, +}; + +static int __init cpufreq_gov_powersave_init(void) +{ + return cpufreq_register_governor(&cpufreq_gov_powersave); +} + +static void __exit cpufreq_gov_powersave_exit(void) +{ + cpufreq_unregister_governor(&cpufreq_gov_powersave); +} + +MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>"); +MODULE_DESCRIPTION("CPUfreq policy governor 'powersave'"); +MODULE_LICENSE("GPL"); + +#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE +fs_initcall(cpufreq_gov_powersave_init); +#else +module_init(cpufreq_gov_powersave_init); +#endif +module_exit(cpufreq_gov_powersave_exit); |