Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Gautham R Shenoy | e08f5f5 | 2006-10-26 16:20:58 +0530 | [diff] [blame^] | 18 | #define dprintk(msg...) \ |
| 19 | cpufreq_debug_printk(CPUFREQ_DEBUG_GOVERNOR, "powersave", msg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | |
| 21 | static int cpufreq_governor_powersave(struct cpufreq_policy *policy, |
| 22 | unsigned int event) |
| 23 | { |
| 24 | switch (event) { |
| 25 | case CPUFREQ_GOV_START: |
| 26 | case CPUFREQ_GOV_LIMITS: |
Gautham R Shenoy | e08f5f5 | 2006-10-26 16:20:58 +0530 | [diff] [blame^] | 27 | dprintk("setting to %u kHz because of event %u\n", |
| 28 | policy->min, event); |
| 29 | __cpufreq_driver_target(policy, policy->min, |
| 30 | CPUFREQ_RELATION_L); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | break; |
| 32 | default: |
| 33 | break; |
| 34 | } |
| 35 | return 0; |
| 36 | } |
Dave Jones | 32ee8c3 | 2006-02-28 00:43:23 -0500 | [diff] [blame] | 37 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | static struct cpufreq_governor cpufreq_gov_powersave = { |
| 39 | .name = "powersave", |
| 40 | .governor = cpufreq_governor_powersave, |
| 41 | .owner = THIS_MODULE, |
| 42 | }; |
| 43 | |
| 44 | |
| 45 | static int __init cpufreq_gov_powersave_init(void) |
| 46 | { |
| 47 | return cpufreq_register_governor(&cpufreq_gov_powersave); |
| 48 | } |
| 49 | |
| 50 | |
| 51 | static void __exit cpufreq_gov_powersave_exit(void) |
| 52 | { |
| 53 | cpufreq_unregister_governor(&cpufreq_gov_powersave); |
| 54 | } |
| 55 | |
| 56 | |
| 57 | MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>"); |
| 58 | MODULE_DESCRIPTION("CPUfreq policy governor 'powersave'"); |
| 59 | MODULE_LICENSE("GPL"); |
| 60 | |
| 61 | module_init(cpufreq_gov_powersave_init); |
| 62 | module_exit(cpufreq_gov_powersave_exit); |