5f7c0080f4
The struct devfreq_cooling_power is defined only if the devfreq driver's kernel config flag is defined. Drivers using the devfreq cooling device APIs without having the devfreq kconfig flag enabled will have compilation errors because the struct devfreq_cooling_power will not be defined. To avoid this, define the struct devfreq_cooling_power and make it available even when devfreq kernel config flag is not enabled. Change-Id: I39973c0bbd3f760dc9ce557e8f7308df7b564fad Signed-off-by: Ram Chandrasekar <rkumbako@codeaurora.org>
82 lines
2.5 KiB
C
82 lines
2.5 KiB
C
/*
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* devfreq_cooling: Thermal cooling device implementation for devices using
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* devfreq
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*
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* Copyright (C) 2014-2015 ARM Limited
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any
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* kind, whether express or implied; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef __DEVFREQ_COOLING_H__
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#define __DEVFREQ_COOLING_H__
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#include <linux/devfreq.h>
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#include <linux/thermal.h>
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/**
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* struct devfreq_cooling_power - Devfreq cooling power ops
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* @get_static_power: Take voltage, in mV, and return the static power
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* in mW. If NULL, the static power is assumed
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* to be 0.
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* @get_dynamic_power: Take voltage, in mV, and frequency, in HZ, and
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* return the dynamic power draw in mW. If NULL,
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* a simple power model is used.
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* @dyn_power_coeff: Coefficient for the simple dynamic power model in
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* mW/(MHz mV mV).
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* If get_dynamic_power() is NULL, then the
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* dynamic power is calculated as
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* @dyn_power_coeff * frequency * voltage^2
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*/
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struct devfreq_cooling_power {
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unsigned long (*get_static_power)(unsigned long voltage);
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unsigned long (*get_dynamic_power)(unsigned long freq,
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unsigned long voltage);
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unsigned long dyn_power_coeff;
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};
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#ifdef CONFIG_DEVFREQ_THERMAL
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struct thermal_cooling_device *
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of_devfreq_cooling_register_power(struct device_node *np, struct devfreq *df,
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struct devfreq_cooling_power *dfc_power);
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struct thermal_cooling_device *
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of_devfreq_cooling_register(struct device_node *np, struct devfreq *df);
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struct thermal_cooling_device *devfreq_cooling_register(struct devfreq *df);
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void devfreq_cooling_unregister(struct thermal_cooling_device *dfc);
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#else /* !CONFIG_DEVFREQ_THERMAL */
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struct thermal_cooling_device *
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of_devfreq_cooling_register_power(struct device_node *np, struct devfreq *df,
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struct devfreq_cooling_power *dfc_power)
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{
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return ERR_PTR(-EINVAL);
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}
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static inline struct thermal_cooling_device *
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of_devfreq_cooling_register(struct device_node *np, struct devfreq *df)
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{
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return ERR_PTR(-EINVAL);
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}
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static inline struct thermal_cooling_device *
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devfreq_cooling_register(struct devfreq *df)
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{
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return ERR_PTR(-EINVAL);
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}
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static inline void
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devfreq_cooling_unregister(struct thermal_cooling_device *dfc)
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{
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}
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#endif /* CONFIG_DEVFREQ_THERMAL */
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#endif /* __DEVFREQ_COOLING_H__ */
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