ggow
101 lines
3.3 KiB
C
101 lines
3.3 KiB
C
/*
|
|
* linux/include/linux/cpu_cooling.h
|
|
*
|
|
* Copyright (C) 2012 Samsung Electronics Co., Ltd(http://www.samsung.com)
|
|
* Copyright (C) 2012 Amit Daniel <amit.kachhap@linaro.org>
|
|
*
|
|
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; version 2 of the License.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
|
|
*
|
|
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
*/
|
|
|
|
#ifndef __CPU_COOLING_H__
|
|
#define __CPU_COOLING_H__
|
|
|
|
#include <linux/thermal.h>
|
|
#include <linux/cpumask.h>
|
|
|
|
#include <linux/module.h>
|
|
|
|
#ifdef CONFIG_CPU_THERMAL
|
|
|
|
/**
|
|
* struct cpufreq_cooling_device - data for cooling device with cpufreq
|
|
* @id: unique integer value corresponding to each cpufreq_cooling_device
|
|
* registered.
|
|
* @cool_dev: thermal_cooling_device pointer to keep track of the
|
|
* registered cooling device.
|
|
* @cpufreq_state: integer value representing the current state of cpufreq
|
|
* cooling devices.
|
|
* @cpufreq_val: integer value representing the absolute value of the clipped
|
|
* frequency.
|
|
* @allowed_cpus: all the cpus involved for this cpufreq_cooling_device.
|
|
*
|
|
* This structure is required for keeping information of each
|
|
* cpufreq_cooling_device registered. In order to prevent corruption of this a
|
|
* mutex lock cooling_cpufreq_lock is used.
|
|
*/
|
|
struct cpufreq_cooling_device {
|
|
int id;
|
|
struct thermal_cooling_device *cool_dev;
|
|
unsigned long levels[THERMAL_MAX_TRIPS];
|
|
unsigned long cooling_state;
|
|
unsigned int cpufreq_state;
|
|
unsigned int cpufreq_val;
|
|
struct cpumask allowed_cpus;
|
|
struct cpufreq_cooling_device *notify_device;
|
|
struct notifier_block nb;
|
|
struct list_head node;
|
|
};
|
|
|
|
/**
|
|
* cpufreq_cooling_register - function to create cpufreq cooling device.
|
|
* @clip_cpus: cpumask of cpus where the frequency constraints will happen
|
|
*/
|
|
struct thermal_cooling_device *
|
|
cpufreq_cooling_register(const struct cpumask *clip_cpus);
|
|
|
|
/**
|
|
* cpufreq_cooling_unregister - function to remove cpufreq cooling device.
|
|
* @cdev: thermal cooling device pointer.
|
|
*/
|
|
void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev);
|
|
|
|
unsigned long cpufreq_cooling_get_level(unsigned int cpu, unsigned int freq);
|
|
unsigned int cpufreq_cooling_get_frequency(unsigned int cpu, unsigned long level);
|
|
#else /* !CONFIG_CPU_THERMAL */
|
|
static inline struct thermal_cooling_device *
|
|
cpufreq_cooling_register(const struct cpumask *clip_cpus)
|
|
{
|
|
return NULL;
|
|
}
|
|
static inline
|
|
void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev)
|
|
{
|
|
return;
|
|
}
|
|
static inline
|
|
unsigned long cpufreq_cooling_get_level(unsigned int cpu, unsigned int freq)
|
|
{
|
|
return THERMAL_CSTATE_INVALID;
|
|
}
|
|
unsigned int cpufreq_cooling_get_frequency(unsigned int cpu, unsigned long level)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_CPU_THERMAL */
|
|
|
|
#endif /* __CPU_COOLING_H__ */
|