/*
* 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 dev_pm_opp;
struct device;

enum dev_pm_opp_event {
OPP_EVENT_ADD, OPP_EVENT_ENABLE, OPP_EVENT_DISABLE,
};

#if defined(CONFIG_PM_OPP)

unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp);

unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp);

int dev_pm_opp_get_opp_count(struct device *dev);

struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
unsigned long freq,
bool available);

struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
unsigned long *freq);

struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
unsigned long *freq);

int dev_pm_opp_add(struct device *dev, unsigned long freq,
unsigned long u_volt);

int dev_pm_opp_enable(struct device *dev, unsigned long freq);

int dev_pm_opp_disable(struct device *dev, unsigned long freq);

struct srcu_notifier_head *dev_pm_opp_get_notifier(struct device *dev);
#else
static inline unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp)
{
return 0;
}

static inline unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp)
{
return 0;
}

static inline int dev_pm_opp_get_opp_count(struct device *dev)
{
return 0;
}

static inline struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
unsigned long freq, bool available)
{
return ERR_PTR(-EINVAL);
}

static inline struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
unsigned long *freq)
{
return ERR_PTR(-EINVAL);
}

static inline struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
unsigned long *freq)
{
return ERR_PTR(-EINVAL);
}

static inline int dev_pm_opp_add(struct device *dev, unsigned long freq,
unsigned long u_volt)
{
return -EINVAL;
}

static inline int dev_pm_opp_enable(struct device *dev, unsigned long freq)
{
return 0;
}

static inline int dev_pm_opp_disable(struct device *dev, unsigned long freq)
{
return 0;
}

static inline struct srcu_notifier_head *dev_pm_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 dev_pm_opp_init_cpufreq_table(struct device *dev,
struct cpufreq_frequency_table **table);
void dev_pm_opp_free_cpufreq_table(struct device *dev,
struct cpufreq_frequency_table **table);
#else
static inline int dev_pm_opp_init_cpufreq_table(struct device *dev,
struct cpufreq_frequency_table **table)
{
return -EINVAL;
}

static inline
void dev_pm_opp_free_cpufreq_table(struct device *dev,
struct cpufreq_frequency_table **table)
{
}
#endif /* CONFIG_CPU_FREQ */

#endif /* __LINUX_OPP_H__ */