drivers/devfreq/governor_powersave.c

   1 /*
   2  *  linux/drivers/devfreq/governor_powersave.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
  15 static int devfreq_powersave_func(struct devfreq *df,
  16                                   unsigned long *freq)
  17 {
  18         /*
  19          * target callback should be able to get ceiling value as
  20          * said in devfreq.h
  21          */
  22         *freq = df->min_freq;
  23         return 0;
  24 }
  25
  26 static int powersave_init(struct devfreq *devfreq)
  27 {
  28         return update_devfreq(devfreq);
  29 }
  30
  31 const struct devfreq_governor devfreq_powersave = {
  32         .name = "powersave",
  33         .init = powersave_init,
  34         .get_target_freq = devfreq_powersave_func,
  35         .no_central_polling = true,
  36 };