[mirror_ubuntu-artful-kernel.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_REMOVE, 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);
void dev_pm_opp_remove(struct device *dev, unsigned long freq);

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 void dev_pm_opp_remove(struct device *dev, unsigned long freq)
{
}

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);
void of_free_opp_table(struct device *dev);
#else
static inline int of_init_opp_table(struct device *dev)
{
	return -EINVAL;
}

static inline void of_free_opp_table(struct device *dev)
{
}
#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 {
129eec55	24	OPP_EVENT_ADD, OPP_EVENT_REMOVE, OPP_EVENT_ENABLE, OPP_EVENT_DISABLE,
03ca370f MH	25	};
03ca370f MH	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);
129eec55	47	void dev_pm_opp_remove(struct device *dev, unsigned long freq);
e1f60b29	48
5d4879cd	49	int dev_pm_opp_enable(struct device *dev, unsigned long freq);
e1f60b29	50
5d4879cd	51	int dev_pm_opp_disable(struct device *dev, unsigned long freq);
e1f60b29	52
5d4879cd	53	struct srcu_notifier_head dev_pm_opp_get_notifier(struct device dev);
e1f60b29	54	#else
47d43ba7	55	static inline unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp)
e1f60b29 NM	56	{
	57	return 0;
	58	}
	59
47d43ba7	60	static inline unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp)
e1f60b29 NM	61	{
	62	return 0;
	63	}
	64
5d4879cd	65	static inline int dev_pm_opp_get_opp_count(struct device *dev)
e1f60b29 NM	66	{
	67	return 0;
	68	}
	69
47d43ba7	70	static inline struct dev_pm_opp dev_pm_opp_find_freq_exact(struct device dev,
e1f60b29 NM	71	unsigned long freq, bool available)
	72	{
	73	return ERR_PTR(-EINVAL);
	74	}
	75
47d43ba7	76	static inline struct dev_pm_opp dev_pm_opp_find_freq_floor(struct device dev,
e1f60b29 NM	77	unsigned long *freq)
	78	{
	79	return ERR_PTR(-EINVAL);
	80	}
	81
47d43ba7	82	static inline struct dev_pm_opp dev_pm_opp_find_freq_ceil(struct device dev,
e1f60b29 NM	83	unsigned long *freq)
	84	{
	85	return ERR_PTR(-EINVAL);
	86	}
	87
5d4879cd	88	static inline int dev_pm_opp_add(struct device *dev, unsigned long freq,
e1f60b29 NM	89	unsigned long u_volt)
	90	{
	91	return -EINVAL;
	92	}
	93
129eec55 VK	94	static inline void dev_pm_opp_remove(struct device *dev, unsigned long freq)
	95	{
	96	}
	97
5d4879cd	98	static inline int dev_pm_opp_enable(struct device *dev, unsigned long freq)
e1f60b29 NM	99	{
	100	return 0;
	101	}
	102
5d4879cd	103	static inline int dev_pm_opp_disable(struct device *dev, unsigned long freq)
e1f60b29 NM	104	{
	105	return 0;
	106	}
03ca370f	107
5d4879cd NM	108	static inline struct srcu_notifier_head *dev_pm_opp_get_notifier(
5d4879cd NM	109	struct device *dev)
03ca370f MH	110	{
	111	return ERR_PTR(-EINVAL);
	112	}
a96d69d1	113	#endif /* CONFIG_PM_OPP */
e1f60b29	114
d6561bb2 SG	115	#if defined(CONFIG_PM_OPP) && defined(CONFIG_OF)
d6561bb2 SG	116	int of_init_opp_table(struct device *dev);
129eec55	117	void of_free_opp_table(struct device *dev);
d6561bb2 SG	118	#else
	119	static inline int of_init_opp_table(struct device *dev)
	120	{
	121	return -EINVAL;
	122	}
129eec55 VK	123
	124	static inline void of_free_opp_table(struct device *dev)
	125	{
	126	}
d6561bb2 SG	127	#endif
d6561bb2 SG	128
e1f60b29	129	#endif /* __LINUX_OPP_H__ */