1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 *  linux/drivers/devfreq/governor_performance.c
 4 *
 5 *  Copyright (C) 2011 Samsung Electronics
 6 *	MyungJoo Ham <myungjoo.ham@samsung.com>
 
 
 
 
 7 */
 8
 9#include <linux/devfreq.h>
10#include <linux/module.h>
11#include "governor.h"
12
13static int devfreq_performance_func(struct devfreq *df,
14				    unsigned long *freq)
15{
16	/*
17	 * target callback should be able to get floor value as
18	 * said in devfreq.h
19	 */
20	*freq = DEVFREQ_MAX_FREQ;
 
 
 
21	return 0;
22}
23
24static int devfreq_performance_handler(struct devfreq *devfreq,
25				unsigned int event, void *data)
26{
27	int ret = 0;
28
29	if (event == DEVFREQ_GOV_START) {
30		mutex_lock(&devfreq->lock);
31		ret = update_devfreq(devfreq);
32		mutex_unlock(&devfreq->lock);
33	}
34
35	return ret;
36}
37
38static struct devfreq_governor devfreq_performance = {
39	.name = DEVFREQ_GOV_PERFORMANCE,
 
40	.get_target_freq = devfreq_performance_func,
41	.event_handler = devfreq_performance_handler,
42};
43
44static int __init devfreq_performance_init(void)
45{
46	return devfreq_add_governor(&devfreq_performance);
47}
48subsys_initcall(devfreq_performance_init);
49
50static void __exit devfreq_performance_exit(void)
51{
52	int ret;
53
54	ret = devfreq_remove_governor(&devfreq_performance);
55	if (ret)
56		pr_err("%s: failed remove governor %d\n", __func__, ret);
57
58	return;
59}
60module_exit(devfreq_performance_exit);
61MODULE_LICENSE("GPL");

 
 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 "governor.h"
14
15static int devfreq_performance_func(struct devfreq *df,
16				    unsigned long *freq)
17{
18	/*
19	 * target callback should be able to get floor value as
20	 * said in devfreq.h
21	 */
22	if (!df->max_freq)
23		*freq = UINT_MAX;
24	else
25		*freq = df->max_freq;
26	return 0;
27}
28
29static int performance_init(struct devfreq *devfreq)
 
30{
31	return update_devfreq(devfreq);
 
 
 
 
 
 
 
 
32}
33
34const struct devfreq_governor devfreq_performance = {
35	.name = "performance",
36	.init = performance_init,
37	.get_target_freq = devfreq_performance_func,
38	.no_central_polling = true,
39};