2 * linux/drivers/devfreq/governor_powersave.c
4 * Copyright (C) 2011 Samsung Electronics
5 * MyungJoo Ham <myungjoo.ham@samsung.com>
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.
12 #include <linux/devfreq.h>
15 static int devfreq_powersave_func(struct devfreq *df,
19 * target callback should be able to get ceiling value as
26 static int devfreq_powersave_handler(struct devfreq *devfreq,
27 unsigned int event, void *data)
31 if (event == DEVFREQ_GOV_START) {
32 mutex_lock(&devfreq->lock);
33 ret = update_devfreq(devfreq);
34 mutex_unlock(&devfreq->lock);
40 const struct devfreq_governor devfreq_powersave = {
42 .get_target_freq = devfreq_powersave_func,
43 .event_handler = devfreq_powersave_handler,
46 static int __init devfreq_powersave_init(void)
48 return devfreq_add_governor(&devfreq_powersave);
50 subsys_initcall(devfreq_powersave_init);
52 static void __exit devfreq_powersave_exit(void)
56 ret = devfreq_remove_governor(&devfreq_powersave);
58 pr_err("%s: failed remove governor %d\n", __func__, ret);
62 module_exit(devfreq_powersave_exit);