[deliverable/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);

#ifdef CONFIG_OF
int of_init_opp_table(struct device *dev);
#else
static inline int of_init_opp_table(struct device *dev)
{
	return -EINVAL;
}
#endif /* CONFIG_OF */
#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
b496dfbc SG	51	#ifdef CONFIG_OF
	52	int of_init_opp_table(struct device *dev);
	53	#else
	54	static inline int of_init_opp_table(struct device *dev)
	55	{
	56	return -EINVAL;
	57	}
	58	#endif /* CONFIG_OF */
e1f60b29 NM	59	#else
	60	static inline unsigned long opp_get_voltage(struct opp *opp)
	61	{
	62	return 0;
	63	}
	64
	65	static inline unsigned long opp_get_freq(struct opp *opp)
	66	{
	67	return 0;
	68	}
	69
	70	static inline int opp_get_opp_count(struct device *dev)
	71	{
	72	return 0;
	73	}
	74
	75	static inline struct opp opp_find_freq_exact(struct device dev,
	76	unsigned long freq, bool available)
	77	{
	78	return ERR_PTR(-EINVAL);
	79	}
	80
	81	static inline struct opp opp_find_freq_floor(struct device dev,
	82	unsigned long *freq)
	83	{
	84	return ERR_PTR(-EINVAL);
	85	}
	86
	87	static inline struct opp opp_find_freq_ceil(struct device dev,
	88	unsigned long *freq)
	89	{
	90	return ERR_PTR(-EINVAL);
	91	}
	92
	93	static inline int opp_add(struct device *dev, unsigned long freq,
	94	unsigned long u_volt)
	95	{
	96	return -EINVAL;
	97	}
	98
	99	static inline int opp_enable(struct device *dev, unsigned long freq)
	100	{
	101	return 0;
	102	}
	103
	104	static inline int opp_disable(struct device *dev, unsigned long freq)
	105	{
	106	return 0;
	107	}
03ca370f	108
a96d69d1	109	static inline struct srcu_notifier_head opp_get_notifier(struct device dev)
03ca370f MH	110	{
	111	return ERR_PTR(-EINVAL);
	112	}
a96d69d1	113	#endif /* CONFIG_PM_OPP */
e1f60b29 NM	114
	115	#if defined(CONFIG_CPU_FREQ) && defined(CONFIG_PM_OPP)
	116	int opp_init_cpufreq_table(struct device *dev,
	117	struct cpufreq_frequency_table **table);
99f381d3 NM	118	void opp_free_cpufreq_table(struct device *dev,
99f381d3 NM	119	struct cpufreq_frequency_table **table);
e1f60b29 NM	120	#else
	121	static inline int opp_init_cpufreq_table(struct device *dev,
	122	struct cpufreq_frequency_table **table)
	123	{
	124	return -EINVAL;
	125	}
99f381d3 NM	126
	127	static inline
	128	void opp_free_cpufreq_table(struct device *dev,
	129	struct cpufreq_frequency_table **table)
	130	{
	131	}
e1f60b29 NM	132	#endif /* CONFIG_CPU_FREQ */
	133
	134	#endif /* __LINUX_OPP_H__ */