projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | ||
| 13 | #include <linux/kernel.h> | |
| 14 | #include <linux/module.h> | |
| 15 | #include <linux/cpufreq.h> | |
| 16 | #include <linux/init.h> | |
| 17 | ||
| 1da177e4 LT |
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: | |
| 2d06d8c4 | 24 | pr_debug("setting to %u kHz because of event %u\n", |
| e08f5f5b GS |
25 | policy->min, event); |
| 26 | __cpufreq_driver_target(policy, policy->min, | |
| 27 | CPUFREQ_RELATION_L); | |
| 1da177e4 LT |
28 | break; |
| 29 | default: | |
| 30 | break; | |
| 31 | } | |
| 32 | return 0; | |
| 33 | } | |
| 32ee8c3e | 34 | |
| c4d14bc0 SW |
35 | #ifndef CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE |
| 36 | static | |
| 37 | #endif | |
| 30d221db | 38 | struct cpufreq_governor cpufreq_gov_powersave = { |
| 1da177e4 LT |
39 | .name = "powersave", |
| 40 | .governor = cpufreq_governor_powersave, | |
| 41 | .owner = THIS_MODULE, | |
| 42 | }; | |
| 1da177e4 LT |
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 | ||
| 30d221db AG |
60 | #ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE |
| 61 | fs_initcall(cpufreq_gov_powersave_init); | |
| 62 | #else | |
| 1da177e4 | 63 | module_init(cpufreq_gov_powersave_init); |
| 30d221db | 64 | #endif |
| 1da177e4 | 65 | module_exit(cpufreq_gov_powersave_exit); |