[GitHub/mt8127/android_kernel_alcatel_ttab.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/kernel.h>
#include <linux/module.h>
#include <linux/cpufreq.h>
#include <linux/init.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 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
db701151 VK	13	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
db701151 VK	14
1da177e4 LT	15	#include <linux/kernel.h>
	16	#include <linux/module.h>
	17	#include <linux/cpufreq.h>
	18	#include <linux/init.h>
	19
1da177e4 LT	20	static int cpufreq_governor_powersave(struct cpufreq_policy *policy,
	21	unsigned int event)
	22	{
	23	switch (event) {
	24	case CPUFREQ_GOV_START:
	25	case CPUFREQ_GOV_LIMITS:
2d06d8c4	26	pr_debug("setting to %u kHz because of event %u\n",
e08f5f5b GS	27	policy->min, event);
	28	__cpufreq_driver_target(policy, policy->min,
	29	CPUFREQ_RELATION_L);
1da177e4 LT	30	break;
	31	default:
	32	break;
	33	}
	34	return 0;
	35	}
32ee8c3e	36
c4d14bc0 SW	37	#ifndef CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE
	38	static
	39	#endif
30d221db	40	struct cpufreq_governor cpufreq_gov_powersave = {
1da177e4 LT	41	.name = "powersave",
	42	.governor = cpufreq_governor_powersave,
	43	.owner = THIS_MODULE,
	44	};
1da177e4 LT	45
	46	static int __init cpufreq_gov_powersave_init(void)
	47	{
	48	return cpufreq_register_governor(&cpufreq_gov_powersave);
	49	}
	50
	51
	52	static void __exit cpufreq_gov_powersave_exit(void)
	53	{
	54	cpufreq_unregister_governor(&cpufreq_gov_powersave);
	55	}
	56
	57
	58	MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
	59	MODULE_DESCRIPTION("CPUfreq policy governor 'powersave'");
	60	MODULE_LICENSE("GPL");
	61
30d221db AG	62	#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE
	63	fs_initcall(cpufreq_gov_powersave_init);
	64	#else
1da177e4	65	module_init(cpufreq_gov_powersave_init);
30d221db	66	#endif
1da177e4	67	module_exit(cpufreq_gov_powersave_exit);