[linux-2.6-block.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;
}

#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	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
c4d14bc0 SW	36	#ifndef CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE
	37	static
	38	#endif
30d221db	39	struct cpufreq_governor cpufreq_gov_powersave = {
1da177e4 LT	40	.name = "powersave",
	41	.governor = cpufreq_governor_powersave,
	42	.owner = THIS_MODULE,
	43	};
1da177e4 LT	44
	45	static int __init cpufreq_gov_powersave_init(void)
	46	{
	47	return cpufreq_register_governor(&cpufreq_gov_powersave);
	48	}
	49
1da177e4 LT	50	static void __exit cpufreq_gov_powersave_exit(void)
	51	{
	52	cpufreq_unregister_governor(&cpufreq_gov_powersave);
	53	}
	54
1da177e4 LT	55	MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
	56	MODULE_DESCRIPTION("CPUfreq policy governor 'powersave'");
	57	MODULE_LICENSE("GPL");
	58
30d221db AG	59	#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE
	60	fs_initcall(cpufreq_gov_powersave_init);
	61	#else
1da177e4	62	module_init(cpufreq_gov_powersave_init);
30d221db	63	#endif
1da177e4	64	module_exit(cpufreq_gov_powersave_exit);