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
18static int cpufreq_governor_powersave(struct cpufreq_policy *policy,
19					unsigned int event)
20{
21	switch (event) {
22	case CPUFREQ_GOV_START:
23	case CPUFREQ_GOV_LIMITS:
24		pr_debug("setting to %u kHz because of event %u\n",
25							policy->min, event);
26		__cpufreq_driver_target(policy, policy->min,
27						CPUFREQ_RELATION_L);
28		break;
29	default:
30		break;
31	}
32	return 0;
33}
34
35#ifndef CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE
36static
37#endif
38struct cpufreq_governor cpufreq_gov_powersave = {
39	.name		= "powersave",
40	.governor	= cpufreq_governor_powersave,
41	.owner		= THIS_MODULE,
42};
43
44static int __init cpufreq_gov_powersave_init(void)
45{
46	return cpufreq_register_governor(&cpufreq_gov_powersave);
47}
48
49
50static void __exit cpufreq_gov_powersave_exit(void)
51{
52	cpufreq_unregister_governor(&cpufreq_gov_powersave);
53}
54
55
56MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
57MODULE_DESCRIPTION("CPUfreq policy governor 'powersave'");
58MODULE_LICENSE("GPL");
59
60#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE
 
 
 
 
 
61fs_initcall(cpufreq_gov_powersave_init);
62#else
63module_init(cpufreq_gov_powersave_init);
64#endif
65module_exit(cpufreq_gov_powersave_exit);

 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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
14
15#include <linux/cpufreq.h>
16#include <linux/init.h>
17#include <linux/module.h>
18
19static void cpufreq_gov_powersave_limits(struct cpufreq_policy *policy)
 
20{
21	pr_debug("setting to %u kHz\n", policy->min);
22	__cpufreq_driver_target(policy, policy->min, CPUFREQ_RELATION_L);
 
 
 
 
 
 
 
 
 
 
23}
24
25static struct cpufreq_governor cpufreq_gov_powersave = {
 
 
 
26	.name		= "powersave",
27	.limits		= cpufreq_gov_powersave_limits,
28	.owner		= THIS_MODULE,
29};
30
31static int __init cpufreq_gov_powersave_init(void)
32{
33	return cpufreq_register_governor(&cpufreq_gov_powersave);
34}
35
 
36static void __exit cpufreq_gov_powersave_exit(void)
37{
38	cpufreq_unregister_governor(&cpufreq_gov_powersave);
39}
40
 
41MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
42MODULE_DESCRIPTION("CPUfreq policy governor 'powersave'");
43MODULE_LICENSE("GPL");
44
45#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE
46struct cpufreq_governor *cpufreq_default_governor(void)
47{
48	return &cpufreq_gov_powersave;
49}
50
51fs_initcall(cpufreq_gov_powersave_init);
52#else
53module_init(cpufreq_gov_powersave_init);
54#endif
55module_exit(cpufreq_gov_powersave_exit);