[mirror_ubuntu-artful-kernel.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 dev_pm_opp_get_voltage(struct opp *opp);

unsigned long dev_pm_opp_get_freq(struct opp *opp);

int dev_pm_opp_get_opp_count(struct device *dev);

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

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

struct 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 opp *opp)
{
	return 0;
}

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

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

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

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

static inline struct 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__ */
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)
e1f60b29 NM	29
5d4879cd	30	unsigned long dev_pm_opp_get_voltage(struct opp *opp);
e1f60b29	31
5d4879cd	32	unsigned long dev_pm_opp_get_freq(struct opp *opp);
e1f60b29	33
5d4879cd	34	int dev_pm_opp_get_opp_count(struct device *dev);
e1f60b29	35
5d4879cd	36	struct opp dev_pm_opp_find_freq_exact(struct device dev, unsigned long freq,
e1f60b29 NM	37	bool available);
e1f60b29 NM	38
5d4879cd	39	struct opp dev_pm_opp_find_freq_floor(struct device dev, unsigned long *freq);
e1f60b29	40
5d4879cd	41	struct opp dev_pm_opp_find_freq_ceil(struct device dev, unsigned long *freq);
e1f60b29	42
5d4879cd NM	43	int dev_pm_opp_add(struct device *dev, unsigned long freq,
5d4879cd NM	44	unsigned long u_volt);
e1f60b29	45
5d4879cd	46	int dev_pm_opp_enable(struct device *dev, unsigned long freq);
e1f60b29	47
5d4879cd	48	int dev_pm_opp_disable(struct device *dev, unsigned long freq);
e1f60b29	49
5d4879cd	50	struct srcu_notifier_head dev_pm_opp_get_notifier(struct device dev);
e1f60b29	51	#else
5d4879cd	52	static inline unsigned long dev_pm_opp_get_voltage(struct opp *opp)
e1f60b29 NM	53	{
	54	return 0;
	55	}
	56
5d4879cd	57	static inline unsigned long dev_pm_opp_get_freq(struct opp *opp)
e1f60b29 NM	58	{
	59	return 0;
	60	}
	61
5d4879cd	62	static inline int dev_pm_opp_get_opp_count(struct device *dev)
e1f60b29 NM	63	{
	64	return 0;
	65	}
	66
5d4879cd	67	static inline struct opp dev_pm_opp_find_freq_exact(struct device dev,
e1f60b29 NM	68	unsigned long freq, bool available)
	69	{
	70	return ERR_PTR(-EINVAL);
	71	}
	72
5d4879cd	73	static inline struct opp dev_pm_opp_find_freq_floor(struct device dev,
e1f60b29 NM	74	unsigned long *freq)
	75	{
	76	return ERR_PTR(-EINVAL);
	77	}
	78
5d4879cd	79	static inline struct opp dev_pm_opp_find_freq_ceil(struct device dev,
e1f60b29 NM	80	unsigned long *freq)
	81	{
	82	return ERR_PTR(-EINVAL);
	83	}
	84
5d4879cd	85	static inline int dev_pm_opp_add(struct device *dev, unsigned long freq,
e1f60b29 NM	86	unsigned long u_volt)
	87	{
	88	return -EINVAL;
	89	}
	90
5d4879cd	91	static inline int dev_pm_opp_enable(struct device *dev, unsigned long freq)
e1f60b29 NM	92	{
	93	return 0;
	94	}
	95
5d4879cd	96	static inline int dev_pm_opp_disable(struct device *dev, unsigned long freq)
e1f60b29 NM	97	{
	98	return 0;
	99	}
03ca370f	100
5d4879cd NM	101	static inline struct srcu_notifier_head *dev_pm_opp_get_notifier(
5d4879cd NM	102	struct device *dev)
03ca370f MH	103	{
	104	return ERR_PTR(-EINVAL);
	105	}
a96d69d1	106	#endif /* CONFIG_PM_OPP */
e1f60b29	107
d6561bb2 SG	108	#if defined(CONFIG_PM_OPP) && defined(CONFIG_OF)
	109	int of_init_opp_table(struct device *dev);
	110	#else
	111	static inline int of_init_opp_table(struct device *dev)
	112	{
	113	return -EINVAL;
	114	}
	115	#endif
	116
e1f60b29	117	#if defined(CONFIG_CPU_FREQ) && defined(CONFIG_PM_OPP)
5d4879cd	118	int dev_pm_opp_init_cpufreq_table(struct device *dev,
e1f60b29	119	struct cpufreq_frequency_table **table);
5d4879cd	120	void dev_pm_opp_free_cpufreq_table(struct device *dev,
99f381d3	121	struct cpufreq_frequency_table **table);
e1f60b29	122	#else
5d4879cd	123	static inline int dev_pm_opp_init_cpufreq_table(struct device *dev,
e1f60b29 NM	124	struct cpufreq_frequency_table **table)
	125	{
	126	return -EINVAL;
	127	}
99f381d3 NM	128
99f381d3 NM	129	static inline
5d4879cd	130	void dev_pm_opp_free_cpufreq_table(struct device *dev,
99f381d3 NM	131	struct cpufreq_frequency_table **table)
	132	{
	133	}
e1f60b29 NM	134	#endif /* CONFIG_CPU_FREQ */
	135
	136	#endif /* __LINUX_OPP_H__ */