linux-imx

/*

 * drivers/cpufreq/cpufreq_governor.h

 *

 * Header file for CPUFreq governors common code

 *

 * Copyright    (C) 2001 Russell King

 *      (C) 2003 Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>.

 *      (C) 2003 Jun Nakajima <jun.nakajima@intel.com>

 *      (C) 2009 Alexander Clouter <alex@digriz.org.uk>

 *      (c) 2012 Viresh Kumar <viresh.kumar@linaro.org>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 */

​

#ifndef _CPUFREQ_GOVERNOR_H

#define _CPUFREQ_GOVERNOR_H

​

#include <linux/atomic.h>

#include <linux/irq_work.h>

#include <linux/cpufreq.h>

#include <linux/sched/cpufreq.h>

#include <linux/kernel_stat.h>

#include <linux/module.h>

#include <linux/mutex.h>

​

/* Ondemand Sampling types */

enum {OD_NORMAL_SAMPLE, OD_SUB_SAMPLE};

​

/*

 * Abbreviations:

 * dbs: used as a shortform for demand based switching It helps to keep variable

 *  names smaller, simpler

 * cdbs: common dbs

 * od_*: On-demand governor

 * cs_*: Conservative governor

 */

​

/* Governor demand based switching data (per-policy or global). */

struct dbs_data {

    struct gov_attr_set attr_set;

    void *tuners;

    unsigned int ignore_nice_load;

    unsigned int sampling_rate;

    unsigned int sampling_down_factor;

    unsigned int up_threshold;

    unsigned int io_is_busy;

};

​

static inline struct dbs_data *to_dbs_data(struct gov_attr_set *attr_set)

{

    return container_of(attr_set, struct dbs_data, attr_set);

}

​

#define gov_show_one(_gov, file_name)                   \

static ssize_t show_##file_name                     \

(struct gov_attr_set *attr_set, char *buf)              \

{                                   \

    struct dbs_data *dbs_data = to_dbs_data(attr_set);      \

    struct _gov##_dbs_tuners *tuners = dbs_data->tuners;        \

    return sprintf(buf, "%u\n", tuners->file_name);         \

}