/drivers/cpufreq/cpufreq_performance.c

 1/*
 2 *  linux/drivers/cpufreq/cpufreq_performance.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#define dprintk(msg...) \
19	cpufreq_debug_printk(CPUFREQ_DEBUG_GOVERNOR, "performance", msg)
20
21
22static int cpufreq_governor_performance(struct cpufreq_policy *policy,
23					unsigned int event)
24{
25	switch (event) {
26	case CPUFREQ_GOV_START:
27	case CPUFREQ_GOV_LIMITS:
28		dprintk("setting to %u kHz because of event %u\n",
29						policy->max, event);
30		__cpufreq_driver_target(policy, policy->max,
31						CPUFREQ_RELATION_H);
32		break;
33	default:
34		break;
35	}
36	return 0;
37}
38
39#ifdef CONFIG_CPU_FREQ_GOV_PERFORMANCE_MODULE
40static
41#endif
42struct cpufreq_governor cpufreq_gov_performance = {
43	.name		= "performance",
44	.governor	= cpufreq_governor_performance,
45	.owner		= THIS_MODULE,
46};
47
48
49static int __init cpufreq_gov_performance_init(void)
50{
51	return cpufreq_register_governor(&cpufreq_gov_performance);
52}
53
54
55static void __exit cpufreq_gov_performance_exit(void)
56{
57	cpufreq_unregister_governor(&cpufreq_gov_performance);
58}
59
60
61MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
62MODULE_DESCRIPTION("CPUfreq policy governor 'performance'");
63MODULE_LICENSE("GPL");
64
65fs_initcall(cpufreq_gov_performance_init);
66module_exit(cpufreq_gov_performance_exit);