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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 |
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); |