blob: c85edda7feb0168c2bd5ff229884cc93f494fd10 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
18#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_GOVERNOR, "powersave", msg)
19
20static 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:
26 dprintk("setting to %u kHz because of event %u\n", policy->min, event);
27 __cpufreq_driver_target(policy, policy->min, CPUFREQ_RELATION_L);
28 break;
29 default:
30 break;
31 }
32 return 0;
33}
34
35static struct cpufreq_governor cpufreq_gov_powersave = {
36 .name = "powersave",
37 .governor = cpufreq_governor_powersave,
38 .owner = THIS_MODULE,
39};
40
41
42static int __init cpufreq_gov_powersave_init(void)
43{
44 return cpufreq_register_governor(&cpufreq_gov_powersave);
45}
46
47
48static void __exit cpufreq_gov_powersave_exit(void)
49{
50 cpufreq_unregister_governor(&cpufreq_gov_powersave);
51}
52
53
54MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
55MODULE_DESCRIPTION("CPUfreq policy governor 'powersave'");
56MODULE_LICENSE("GPL");
57
58module_init(cpufreq_gov_powersave_init);
59module_exit(cpufreq_gov_powersave_exit);