60 lines
1.5 KiB
C
60 lines
1.5 KiB
C
|
/*
|
||
|
|
* 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.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/cpufreq.h>
|
||
|
|
#include <linux/init.h>
|
||
|
|
|
||
|
|
#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_GOVERNOR, "powersave", msg)
|
||
|
|
|
||
|
|
static int cpufreq_governor_powersave(struct cpufreq_policy *policy,
|
||
|
|
unsigned int event)
|
||
|
|
{
|
||
|
|
switch (event) {
|
||
|
|
case CPUFREQ_GOV_START:
|
||
|
|
case CPUFREQ_GOV_LIMITS:
|
||
|
|
dprintk("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;
|
||
|
|
}
|
||
|
|
|
||
|
|
static 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");
|
||
|
|
|
||
|
|
module_init(cpufreq_gov_powersave_init);
|
||
|
|
module_exit(cpufreq_gov_powersave_exit);
|