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/*
* devfreq_cooling: Thermal cooling device implementation for devices using
* devfreq
*
* Copyright (C) 2014-2015 ARM Limited
*
* 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.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
* kind, whether express or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef __DEVFREQ_COOLING_H__
#define __DEVFREQ_COOLING_H__
#include <linux/devfreq.h>
#include <linux/thermal.h>
#ifdef CONFIG_DEVFREQ_THERMAL
/**
* struct devfreq_cooling_power - Devfreq cooling power ops
* @get_static_power: Take voltage, in mV, and return the static power
* in mW. If NULL, the static power is assumed
* to be 0.
* @get_dynamic_power: Take voltage, in mV, and frequency, in HZ, and
* return the dynamic power draw in mW. If NULL,
* a simple power model is used.
* @dyn_power_coeff: Coefficient for the simple dynamic power model in
* mW/(MHz mV mV).
* If get_dynamic_power() is NULL, then the
* dynamic power is calculated as
* @dyn_power_coeff * frequency * voltage^2
*/
struct devfreq_cooling_power {
unsigned long (*get_static_power)(unsigned long voltage);
unsigned long (*get_dynamic_power)(unsigned long freq,
unsigned long voltage);
unsigned long dyn_power_coeff;
};
struct thermal_cooling_device *
of_devfreq_cooling_register_power(struct device_node *np, struct devfreq *df,
struct devfreq_cooling_power *dfc_power);
struct thermal_cooling_device *
of_devfreq_cooling_register(struct device_node *np, struct devfreq *df);
struct thermal_cooling_device *devfreq_cooling_register(struct devfreq *df);
void devfreq_cooling_unregister(struct thermal_cooling_device *dfc);
#else /* !CONFIG_DEVFREQ_THERMAL */
struct thermal_cooling_device *
of_devfreq_cooling_register_power(struct device_node *np, struct devfreq *df,
struct devfreq_cooling_power *dfc_power)
{
return ERR_PTR(-EINVAL);
}
static inline struct thermal_cooling_device *
of_devfreq_cooling_register(struct device_node *np, struct devfreq *df)
{
return ERR_PTR(-EINVAL);
}
static inline struct thermal_cooling_device *
devfreq_cooling_register(struct devfreq *df)
{
return ERR_PTR(-EINVAL);
}
static inline void
devfreq_cooling_unregister(struct thermal_cooling_device *dfc)
{
}
#endif /* CONFIG_DEVFREQ_THERMAL */
#endif /* __DEVFREQ_COOLING_H__ */