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// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * linux/drivers/cpufreq/cpufreq_powersave.c
 
 
 
 
 
 
 
 4 *
 5 * Copyright (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
 6 */
 7
 8#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 9
10#include <linux/cpufreq.h>
11#include <linux/init.h>
12#include <linux/module.h>
13
14static void cpufreq_gov_powersave_limits(struct cpufreq_policy *policy)
 
15{
16	pr_debug("setting to %u kHz\n", policy->min);
17	__cpufreq_driver_target(policy, policy->min, CPUFREQ_RELATION_L);
 
 
 
 
 
 
 
 
 
 
18}
19
20static struct cpufreq_governor cpufreq_gov_powersave = {
 
 
 
21	.name		= "powersave",
22	.limits		= cpufreq_gov_powersave_limits,
23	.owner		= THIS_MODULE,
24	.flags		= CPUFREQ_GOV_STRICT_TARGET,
25};
26
 
 
 
 
 
 
 
 
 
 
 
 
27MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
28MODULE_DESCRIPTION("CPUfreq policy governor 'powersave'");
29MODULE_LICENSE("GPL");
30
31#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE
32struct cpufreq_governor *cpufreq_default_governor(void)
33{
34	return &cpufreq_gov_powersave;
35}
36#endif
37
38cpufreq_governor_init(cpufreq_gov_powersave);
39cpufreq_governor_exit(cpufreq_gov_powersave);