linux-stable/include/linux/opp.h
Shawn Guo d6561bb206 PM / OPP: fix condition for empty of_init_opp_table()
randconfig build reports the following error which is caused by
CONFIG_PM_OPP being unset.

  CC      arch/arm/mach-imx/mach-imx6q.o
arch/arm/mach-imx/mach-imx6q.c: In function ‘imx6q_opp_init’:
arch/arm/mach-imx/mach-imx6q.c:248:2: error: implicit declaration of function ‘of_init_opp_table’ [-Werror=implicit-function-declaration]

Fix the error by giving a more correct condition for empty
of_init_opp_table() implementation.

Reported-by: Rob Herring <robherring2@gmail.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-02-23 00:30:08 +01:00

134 lines
2.9 KiB
C

/*
* Generic OPP Interface
*
* Copyright (C) 2009-2010 Texas Instruments Incorporated.
* Nishanth Menon
* Romit Dasgupta
* Kevin Hilman
*
* 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.
*/
#ifndef __LINUX_OPP_H__
#define __LINUX_OPP_H__
#include <linux/err.h>
#include <linux/cpufreq.h>
#include <linux/notifier.h>
struct opp;
struct device;
enum opp_event {
OPP_EVENT_ADD, OPP_EVENT_ENABLE, OPP_EVENT_DISABLE,
};
#if defined(CONFIG_PM_OPP)
unsigned long opp_get_voltage(struct opp *opp);
unsigned long opp_get_freq(struct opp *opp);
int opp_get_opp_count(struct device *dev);
struct opp *opp_find_freq_exact(struct device *dev, unsigned long freq,
bool available);
struct opp *opp_find_freq_floor(struct device *dev, unsigned long *freq);
struct opp *opp_find_freq_ceil(struct device *dev, unsigned long *freq);
int opp_add(struct device *dev, unsigned long freq, unsigned long u_volt);
int opp_enable(struct device *dev, unsigned long freq);
int opp_disable(struct device *dev, unsigned long freq);
struct srcu_notifier_head *opp_get_notifier(struct device *dev);
#else
static inline unsigned long opp_get_voltage(struct opp *opp)
{
return 0;
}
static inline unsigned long opp_get_freq(struct opp *opp)
{
return 0;
}
static inline int opp_get_opp_count(struct device *dev)
{
return 0;
}
static inline struct opp *opp_find_freq_exact(struct device *dev,
unsigned long freq, bool available)
{
return ERR_PTR(-EINVAL);
}
static inline struct opp *opp_find_freq_floor(struct device *dev,
unsigned long *freq)
{
return ERR_PTR(-EINVAL);
}
static inline struct opp *opp_find_freq_ceil(struct device *dev,
unsigned long *freq)
{
return ERR_PTR(-EINVAL);
}
static inline int opp_add(struct device *dev, unsigned long freq,
unsigned long u_volt)
{
return -EINVAL;
}
static inline int opp_enable(struct device *dev, unsigned long freq)
{
return 0;
}
static inline int opp_disable(struct device *dev, unsigned long freq)
{
return 0;
}
static inline struct srcu_notifier_head *opp_get_notifier(struct device *dev)
{
return ERR_PTR(-EINVAL);
}
#endif /* CONFIG_PM_OPP */
#if defined(CONFIG_PM_OPP) && defined(CONFIG_OF)
int of_init_opp_table(struct device *dev);
#else
static inline int of_init_opp_table(struct device *dev)
{
return -EINVAL;
}
#endif
#if defined(CONFIG_CPU_FREQ) && defined(CONFIG_PM_OPP)
int opp_init_cpufreq_table(struct device *dev,
struct cpufreq_frequency_table **table);
void opp_free_cpufreq_table(struct device *dev,
struct cpufreq_frequency_table **table);
#else
static inline int opp_init_cpufreq_table(struct device *dev,
struct cpufreq_frequency_table **table)
{
return -EINVAL;
}
static inline
void opp_free_cpufreq_table(struct device *dev,
struct cpufreq_frequency_table **table)
{
}
#endif /* CONFIG_CPU_FREQ */
#endif /* __LINUX_OPP_H__ */