[deliverable/linux.git] / include / linux / pm_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/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

#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>
03ca370f	18	#include <linux/notifier.h>
e1f60b29	19
47d43ba7	20	struct dev_pm_opp;
313162d0	21	struct device;
e1f60b29	22
47d43ba7	23	enum dev_pm_opp_event {
03ca370f MH	24	OPP_EVENT_ADD, OPP_EVENT_ENABLE, OPP_EVENT_DISABLE,
	25	};
	26
e1f60b29 NM	27	#if defined(CONFIG_PM_OPP)
e1f60b29 NM	28
47d43ba7	29	unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp);
e1f60b29	30
47d43ba7	31	unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp);
e1f60b29	32
5d4879cd	33	int dev_pm_opp_get_opp_count(struct device *dev);
e1f60b29	34
47d43ba7 NM	35	struct dev_pm_opp dev_pm_opp_find_freq_exact(struct device dev,
	36	unsigned long freq,
	37	bool available);
e1f60b29	38
47d43ba7 NM	39	struct dev_pm_opp dev_pm_opp_find_freq_floor(struct device dev,
47d43ba7 NM	40	unsigned long *freq);
e1f60b29	41
47d43ba7 NM	42	struct dev_pm_opp dev_pm_opp_find_freq_ceil(struct device dev,
47d43ba7 NM	43	unsigned long *freq);
e1f60b29	44
5d4879cd NM	45	int dev_pm_opp_add(struct device *dev, unsigned long freq,
5d4879cd NM	46	unsigned long u_volt);
e1f60b29	47
5d4879cd	48	int dev_pm_opp_enable(struct device *dev, unsigned long freq);
e1f60b29	49
5d4879cd	50	int dev_pm_opp_disable(struct device *dev, unsigned long freq);
e1f60b29	51
5d4879cd	52	struct srcu_notifier_head dev_pm_opp_get_notifier(struct device dev);
e1f60b29	53	#else
47d43ba7	54	static inline unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp)
e1f60b29 NM	55	{
	56	return 0;
	57	}
	58
47d43ba7	59	static inline unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp)
e1f60b29 NM	60	{
	61	return 0;
	62	}
	63
5d4879cd	64	static inline int dev_pm_opp_get_opp_count(struct device *dev)
e1f60b29 NM	65	{
	66	return 0;
	67	}
	68
47d43ba7	69	static inline struct dev_pm_opp dev_pm_opp_find_freq_exact(struct device dev,
e1f60b29 NM	70	unsigned long freq, bool available)
	71	{
	72	return ERR_PTR(-EINVAL);
	73	}
	74
47d43ba7	75	static inline struct dev_pm_opp dev_pm_opp_find_freq_floor(struct device dev,
e1f60b29 NM	76	unsigned long *freq)
	77	{
	78	return ERR_PTR(-EINVAL);
	79	}
	80
47d43ba7	81	static inline struct dev_pm_opp dev_pm_opp_find_freq_ceil(struct device dev,
e1f60b29 NM	82	unsigned long *freq)
	83	{
	84	return ERR_PTR(-EINVAL);
	85	}
	86
5d4879cd	87	static inline int dev_pm_opp_add(struct device *dev, unsigned long freq,
e1f60b29 NM	88	unsigned long u_volt)
	89	{
	90	return -EINVAL;
	91	}
	92
5d4879cd	93	static inline int dev_pm_opp_enable(struct device *dev, unsigned long freq)
e1f60b29 NM	94	{
	95	return 0;
	96	}
	97
5d4879cd	98	static inline int dev_pm_opp_disable(struct device *dev, unsigned long freq)
e1f60b29 NM	99	{
	100	return 0;
	101	}
03ca370f	102
5d4879cd NM	103	static inline struct srcu_notifier_head *dev_pm_opp_get_notifier(
5d4879cd NM	104	struct device *dev)
03ca370f MH	105	{
	106	return ERR_PTR(-EINVAL);
	107	}
a96d69d1	108	#endif /* CONFIG_PM_OPP */
e1f60b29	109
d6561bb2 SG	110	#if defined(CONFIG_PM_OPP) && defined(CONFIG_OF)
	111	int of_init_opp_table(struct device *dev);
	112	#else
	113	static inline int of_init_opp_table(struct device *dev)
	114	{
	115	return -EINVAL;
	116	}
	117	#endif
	118
e1f60b29	119	#endif /* __LINUX_OPP_H__ */