[net-next-2.6.git] / drivers / cpufreq / cpufreq_powersave.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;
}

#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);
Commit	Line	Data
1da177e4 LT	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	#include <linux/kernel.h>
	14	#include <linux/module.h>
	15	#include <linux/cpufreq.h>
	16	#include <linux/init.h>
	17
e08f5f5b GS	18	#define dprintk(msg...) \
e08f5f5b GS	19	cpufreq_debug_printk(CPUFREQ_DEBUG_GOVERNOR, "powersave", msg)
1da177e4 LT	20
	21	static int cpufreq_governor_powersave(struct cpufreq_policy *policy,
	22	unsigned int event)
	23	{
	24	switch (event) {
	25	case CPUFREQ_GOV_START:
	26	case CPUFREQ_GOV_LIMITS:
e08f5f5b GS	27	dprintk("setting to %u kHz because of event %u\n",
	28	policy->min, event);
	29	__cpufreq_driver_target(policy, policy->min,
	30	CPUFREQ_RELATION_L);
1da177e4 LT	31	break;
	32	default:
	33	break;
	34	}
	35	return 0;
	36	}
32ee8c3e	37
c4d14bc0 SW	38	#ifndef CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE
	39	static
	40	#endif
30d221db	41	struct cpufreq_governor cpufreq_gov_powersave = {
1da177e4 LT	42	.name = "powersave",
	43	.governor = cpufreq_governor_powersave,
	44	.owner = THIS_MODULE,
	45	};
1da177e4 LT	46
	47	static int __init cpufreq_gov_powersave_init(void)
	48	{
	49	return cpufreq_register_governor(&cpufreq_gov_powersave);
	50	}
	51
	52
	53	static void __exit cpufreq_gov_powersave_exit(void)
	54	{
	55	cpufreq_unregister_governor(&cpufreq_gov_powersave);
	56	}
	57
	58
	59	MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
	60	MODULE_DESCRIPTION("CPUfreq policy governor 'powersave'");
	61	MODULE_LICENSE("GPL");
	62
30d221db AG	63	#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE
	64	fs_initcall(cpufreq_gov_powersave_init);
	65	#else
1da177e4	66	module_init(cpufreq_gov_powersave_init);
30d221db	67	#endif
1da177e4	68	module_exit(cpufreq_gov_powersave_exit);