[linux.git] / include / linux / opp.h

/*
 * 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_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__ */
Commit	Line	Data
e1f60b29 NM	1	/*
	2	* Generic OPP Interface
	3	*
	4	* Copyright (C) 2009-2010 Texas Instruments Incorporated.
	5	* Nishanth Menon
	6	* Romit Dasgupta
	7	* Kevin Hilman
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License version 2 as
	11	* published by the Free Software Foundation.
	12	*/
	13
	14	#ifndef __LINUX_OPP_H__
	15	#define __LINUX_OPP_H__
	16
	17	#include <linux/err.h>
	18	#include <linux/cpufreq.h>
03ca370f	19	#include <linux/notifier.h>
e1f60b29 NM	20
e1f60b29 NM	21	struct opp;
313162d0	22	struct device;
e1f60b29	23
03ca370f MH	24	enum opp_event {
	25	OPP_EVENT_ADD, OPP_EVENT_ENABLE, OPP_EVENT_DISABLE,
	26	};
	27
e1f60b29 NM	28	#if defined(CONFIG_PM_OPP)
	29
	30	unsigned long opp_get_voltage(struct opp *opp);
	31
	32	unsigned long opp_get_freq(struct opp *opp);
	33
	34	int opp_get_opp_count(struct device *dev);
	35
	36	struct opp opp_find_freq_exact(struct device dev, unsigned long freq,
	37	bool available);
	38
	39	struct opp opp_find_freq_floor(struct device dev, unsigned long *freq);
	40
	41	struct opp opp_find_freq_ceil(struct device dev, unsigned long *freq);
	42
	43	int opp_add(struct device *dev, unsigned long freq, unsigned long u_volt);
	44
	45	int opp_enable(struct device *dev, unsigned long freq);
	46
	47	int opp_disable(struct device *dev, unsigned long freq);
	48
03ca370f MH	49	struct srcu_notifier_head opp_get_notifier(struct device dev);
03ca370f MH	50
e1f60b29 NM	51	#else
	52	static inline unsigned long opp_get_voltage(struct opp *opp)
	53	{
	54	return 0;
	55	}
	56
	57	static inline unsigned long opp_get_freq(struct opp *opp)
	58	{
	59	return 0;
	60	}
	61
	62	static inline int opp_get_opp_count(struct device *dev)
	63	{
	64	return 0;
	65	}
	66
	67	static inline struct opp opp_find_freq_exact(struct device dev,
	68	unsigned long freq, bool available)
	69	{
	70	return ERR_PTR(-EINVAL);
	71	}
	72
	73	static inline struct opp opp_find_freq_floor(struct device dev,
	74	unsigned long *freq)
	75	{
	76	return ERR_PTR(-EINVAL);
	77	}
	78
	79	static inline struct opp opp_find_freq_ceil(struct device dev,
	80	unsigned long *freq)
	81	{
	82	return ERR_PTR(-EINVAL);
	83	}
	84
	85	static inline int opp_add(struct device *dev, unsigned long freq,
	86	unsigned long u_volt)
	87	{
	88	return -EINVAL;
	89	}
	90
	91	static inline int opp_enable(struct device *dev, unsigned long freq)
	92	{
	93	return 0;
	94	}
	95
	96	static inline int opp_disable(struct device *dev, unsigned long freq)
	97	{
	98	return 0;
	99	}
03ca370f	100
a96d69d1	101	static inline struct srcu_notifier_head opp_get_notifier(struct device dev)
03ca370f MH	102	{
	103	return ERR_PTR(-EINVAL);
	104	}
a96d69d1	105	#endif /* CONFIG_PM_OPP */
e1f60b29 NM	106
	107	#if defined(CONFIG_CPU_FREQ) && defined(CONFIG_PM_OPP)
	108	int opp_init_cpufreq_table(struct device *dev,
	109	struct cpufreq_frequency_table **table);
99f381d3 NM	110	void opp_free_cpufreq_table(struct device *dev,
99f381d3 NM	111	struct cpufreq_frequency_table **table);
e1f60b29 NM	112	#else
	113	static inline int opp_init_cpufreq_table(struct device *dev,
	114	struct cpufreq_frequency_table **table)
	115	{
	116	return -EINVAL;
	117	}
99f381d3 NM	118
	119	static inline
	120	void opp_free_cpufreq_table(struct device *dev,
	121	struct cpufreq_frequency_table **table)
	122	{
	123	}
e1f60b29 NM	124	#endif /* CONFIG_CPU_FREQ */
	125
	126	#endif /* __LINUX_OPP_H__ */