mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 04:34:11 +08:00
0de967f24e
Update the license to the SPDX licensing format. Signed-off-by: Lukasz Luba <lukasz.luba@arm.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Link: https://lore.kernel.org/r/20200730165117.13998-1-lukasz.luba@arm.com
97 lines
3.1 KiB
C
97 lines
3.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* devfreq_cooling: Thermal cooling device implementation for devices using
|
|
* devfreq
|
|
*
|
|
* Copyright (C) 2014-2015 ARM Limited
|
|
*
|
|
*/
|
|
|
|
#ifndef __DEVFREQ_COOLING_H__
|
|
#define __DEVFREQ_COOLING_H__
|
|
|
|
#include <linux/devfreq.h>
|
|
#include <linux/thermal.h>
|
|
|
|
|
|
/**
|
|
* 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
|
|
* @get_real_power: When this is set, the framework uses it to ask the
|
|
* device driver for the actual power.
|
|
* Some devices have more sophisticated methods
|
|
* (like power counters) to approximate the actual power
|
|
* that they use.
|
|
* This function provides more accurate data to the
|
|
* thermal governor. When the driver does not provide
|
|
* such function, framework just uses pre-calculated
|
|
* table and scale the power by 'utilization'
|
|
* (based on 'busy_time' and 'total_time' taken from
|
|
* devfreq 'last_status').
|
|
* The value returned by this function must be lower
|
|
* or equal than the maximum power value
|
|
* for the current state
|
|
* (which can be found in power_table[state]).
|
|
* When this interface is used, the power_table holds
|
|
* max total (static + dynamic) power value for each OPP.
|
|
*/
|
|
struct devfreq_cooling_power {
|
|
unsigned long (*get_static_power)(struct devfreq *devfreq,
|
|
unsigned long voltage);
|
|
unsigned long (*get_dynamic_power)(struct devfreq *devfreq,
|
|
unsigned long freq,
|
|
unsigned long voltage);
|
|
int (*get_real_power)(struct devfreq *df, u32 *power,
|
|
unsigned long freq, unsigned long voltage);
|
|
unsigned long dyn_power_coeff;
|
|
};
|
|
|
|
#ifdef 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);
|
|
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 */
|
|
|
|
static inline 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__ */
|