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/*
* devfreq_cooling: Thermal cooling device implementation for devices using
* devfreq
*
* Copyright (C) 2014 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_ops - Devfreq cooling power ops
* @get_static_power: Take voltage, in mV, and return the static power in mW.
* @get_dynamic_power: Take voltage, in mV, and frequency, in HZ, and return
* the dynamic power draw in mW.
*/
struct devfreq_cooling_ops {
unsigned long (*get_static_power)(unsigned long voltage);
unsigned long (*get_dynamic_power)(unsigned long freq,
unsigned long voltage);
};
/**
* struct devfreq_cooling_device - Devfreq cooling device
* @cdev: Pointer to associated thermal cooling device.
* @devfreq: Pointer to associated devfreq device.
* @cooling_state: Current cooling state.
* @power_table: Pointer to table with maximum power draw for each cooling
* state. State is the index into the table, and the power is
* stated in mW.
* @power_ops: Pointer to power operations, used to generate @power_table.
* @last_status: The devfreq status at last devfreq polling.
*/
struct devfreq_cooling_device {
struct thermal_cooling_device *cdev;
struct devfreq *devfreq;
unsigned long cooling_state;
u32 *power_table;
struct devfreq_cooling_ops *power_ops;
struct devfreq_dev_status last_status;
};
struct devfreq_cooling_device *
of_devfreq_cooling_register_power(struct device_node *np, struct devfreq *df,
struct devfreq_cooling_ops *ops);
struct devfreq_cooling_device *
of_devfreq_cooling_register(struct device_node *np, struct devfreq *df);
struct devfreq_cooling_device *devfreq_cooling_register(struct devfreq *df);
void devfreq_cooling_unregister(struct devfreq_cooling_device *dfc);
#else /* !CONFIG_DEVFREQ_THERMAL */
struct devfreq_cooling_device *
of_devfreq_cooling_register_power(struct device_node *np, struct devfreq *df,
struct devfreq_cooling_ops *ops)
{
return NULL;
}
static inline struct devfreq_cooling_device *
of_devfreq_cooling_register(struct device_node *np, struct devfreq *df)
{
return NULL;
}
static inline struct devfreq_cooling_device *
devfreq_cooling_register(struct devfreq *df)
{
return NULL;
}
static inline void
devfreq_cooling_unregister(struct devfreq_cooling_device *dfc)
{
return;
}
#endif /* CONFIG_DEVFREQ_THERMAL */
#endif /* __DEVFREQ_COOLING_H__ */
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