]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - drivers/cpufreq/cpufreq_powersave.c
Merge branch 'movieboard' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394...
[mirror_ubuntu-bionic-kernel.git] / drivers / cpufreq / cpufreq_powersave.c
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
18 static 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
36 static
37 #endif
38 struct cpufreq_governor cpufreq_gov_powersave = {
39 .name = "powersave",
40 .governor = cpufreq_governor_powersave,
41 .owner = THIS_MODULE,
42 };
43
44 static int __init cpufreq_gov_powersave_init(void)
45 {
46 return cpufreq_register_governor(&cpufreq_gov_powersave);
47 }
48
49
50 static void __exit cpufreq_gov_powersave_exit(void)
51 {
52 cpufreq_unregister_governor(&cpufreq_gov_powersave);
53 }
54
55
56 MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
57 MODULE_DESCRIPTION("CPUfreq policy governor 'powersave'");
58 MODULE_LICENSE("GPL");
59
60 #ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE
61 fs_initcall(cpufreq_gov_powersave_init);
62 #else
63 module_init(cpufreq_gov_powersave_init);
64 #endif
65 module_exit(cpufreq_gov_powersave_exit);