projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 | 1 | /* |
| bb176f7d | 2 | * linux/drivers/cpufreq/cpufreq_powersave.c |
| 1da177e4 | 3 | * |
| bb176f7d | 4 | * Copyright (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de> |
| 1da177e4 LT |
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 | ||
| 1da177e4 LT |
51 | static void __exit cpufreq_gov_powersave_exit(void) |
| 52 | { | |
| 53 | cpufreq_unregister_governor(&cpufreq_gov_powersave); | |
| 54 | } | |
| 55 | ||
| 1da177e4 LT |
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); |