[deliverable/linux.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.
 *
 */

#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;
}

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");

#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE
struct cpufreq_governor *cpufreq_default_governor(void)
{
	return &cpufreq_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	1	/*
bb176f7d	2	* linux/drivers/cpufreq/cpufreq_powersave.c
1da177e4	3	*
bb176f7d	4	* Copyright (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
1da177e4 LT	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
db701151 VK	13	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
db701151 VK	14
1da177e4 LT	15	#include <linux/cpufreq.h>
1da177e4 LT	16	#include <linux/init.h>
5ff0a268	17	#include <linux/module.h>
1da177e4	18
1da177e4 LT	19	static int cpufreq_governor_powersave(struct cpufreq_policy *policy,
	20	unsigned int event)
	21	{
	22	switch (event) {
	23	case CPUFREQ_GOV_START:
	24	case CPUFREQ_GOV_LIMITS:
2d06d8c4	25	pr_debug("setting to %u kHz because of event %u\n",
e08f5f5b GS	26	policy->min, event);
	27	__cpufreq_driver_target(policy, policy->min,
	28	CPUFREQ_RELATION_L);
1da177e4 LT	29	break;
	30	default:
	31	break;
	32	}
	33	return 0;
	34	}
32ee8c3e	35
de1df26b	36	static struct cpufreq_governor cpufreq_gov_powersave = {
1da177e4 LT	37	.name = "powersave",
	38	.governor = cpufreq_governor_powersave,
	39	.owner = THIS_MODULE,
	40	};
1da177e4 LT	41
	42	static int __init cpufreq_gov_powersave_init(void)
	43	{
	44	return cpufreq_register_governor(&cpufreq_gov_powersave);
	45	}
	46
1da177e4 LT	47	static void __exit cpufreq_gov_powersave_exit(void)
	48	{
	49	cpufreq_unregister_governor(&cpufreq_gov_powersave);
	50	}
	51
1da177e4 LT	52	MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
	53	MODULE_DESCRIPTION("CPUfreq policy governor 'powersave'");
	54	MODULE_LICENSE("GPL");
	55
30d221db	56	#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE
de1df26b RW	57	struct cpufreq_governor *cpufreq_default_governor(void)
	58	{
	59	return &cpufreq_gov_powersave;
	60	}
	61
30d221db AG	62	fs_initcall(cpufreq_gov_powersave_init);
30d221db AG	63	#else
1da177e4	64	module_init(cpufreq_gov_powersave_init);
30d221db	65	#endif
1da177e4	66	module_exit(cpufreq_gov_powersave_exit);