1/*
2 * linux/drivers/devfreq/governor_performance.c
3 *
4 * Copyright (C) 2011 Samsung Electronics
5 * MyungJoo Ham <myungjoo.ham@samsung.com>
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#include <linux/devfreq.h>
13#include <linux/module.h>
14#include "governor.h"
15
16static int devfreq_performance_func(struct devfreq *df,
17 unsigned long *freq)
18{
19 /*
20 * target callback should be able to get floor value as
21 * said in devfreq.h
22 */
23 *freq = DEVFREQ_MAX_FREQ;
24 return 0;
25}
26
27static int devfreq_performance_handler(struct devfreq *devfreq,
28 unsigned int event, void *data)
29{
30 int ret = 0;
31
32 if (event == DEVFREQ_GOV_START) {
33 mutex_lock(&devfreq->lock);
34 ret = update_devfreq(devfreq);
35 mutex_unlock(&devfreq->lock);
36 }
37
38 return ret;
39}
40
41static struct devfreq_governor devfreq_performance = {
42 .name = DEVFREQ_GOV_PERFORMANCE,
43 .get_target_freq = devfreq_performance_func,
44 .event_handler = devfreq_performance_handler,
45};
46
47static int __init devfreq_performance_init(void)
48{
49 return devfreq_add_governor(&devfreq_performance);
50}
51subsys_initcall(devfreq_performance_init);
52
53static void __exit devfreq_performance_exit(void)
54{
55 int ret;
56
57 ret = devfreq_remove_governor(&devfreq_performance);
58 if (ret)
59 pr_err("%s: failed remove governor %d\n", __func__, ret);
60
61 return;
62}
63module_exit(devfreq_performance_exit);
64MODULE_LICENSE("GPL");
65