[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_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);
unsigned long dev_pm_opp_get_max_clock_latency(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 unsigned long dev_pm_opp_get_max_clock_latency(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);
int of_cpumask_init_opp_table(cpumask_var_t cpumask);
void of_cpumask_free_opp_table(cpumask_var_t cpumask);
int of_get_cpus_sharing_opps(struct device *cpu_dev, cpumask_var_t cpumask);
int set_cpus_sharing_opps(struct device *cpu_dev, cpumask_var_t cpumask);
#else
static inline int of_init_opp_table(struct device *dev)
{
	return -EINVAL;
}

static inline void of_free_opp_table(struct device *dev)
{
}

static inline int of_cpumask_init_opp_table(cpumask_var_t cpumask)
{
	return -ENOSYS;
}

static inline void of_cpumask_free_opp_table(cpumask_var_t cpumask)
{
}

static inline int of_get_cpus_sharing_opps(struct device *cpu_dev, cpumask_var_t cpumask)
{
	return -ENOSYS;
}

static inline int set_cpus_sharing_opps(struct device *cpu_dev, cpumask_var_t cpumask)
{
	return -ENOSYS;
}
#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);
3ca9bb33	34	unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev);
e1f60b29	35
47d43ba7 NM	36	struct dev_pm_opp dev_pm_opp_find_freq_exact(struct device dev,
	37	unsigned long freq,
	38	bool available);
e1f60b29	39
47d43ba7 NM	40	struct dev_pm_opp dev_pm_opp_find_freq_floor(struct device dev,
47d43ba7 NM	41	unsigned long *freq);
e1f60b29	42
47d43ba7 NM	43	struct dev_pm_opp dev_pm_opp_find_freq_ceil(struct device dev,
47d43ba7 NM	44	unsigned long *freq);
e1f60b29	45
5d4879cd NM	46	int dev_pm_opp_add(struct device *dev, unsigned long freq,
5d4879cd NM	47	unsigned long u_volt);
129eec55	48	void dev_pm_opp_remove(struct device *dev, unsigned long freq);
e1f60b29	49
5d4879cd	50	int dev_pm_opp_enable(struct device *dev, unsigned long freq);
e1f60b29	51
5d4879cd	52	int dev_pm_opp_disable(struct device *dev, unsigned long freq);
e1f60b29	53
5d4879cd	54	struct srcu_notifier_head dev_pm_opp_get_notifier(struct device dev);
e1f60b29	55	#else
47d43ba7	56	static inline unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp)
e1f60b29 NM	57	{
	58	return 0;
	59	}
	60
47d43ba7	61	static inline unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp)
e1f60b29 NM	62	{
	63	return 0;
	64	}
	65
5d4879cd	66	static inline int dev_pm_opp_get_opp_count(struct device *dev)
e1f60b29 NM	67	{
	68	return 0;
	69	}
	70
3ca9bb33 VK	71	static inline unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev)
	72	{
	73	return 0;
	74	}
	75
47d43ba7	76	static inline struct dev_pm_opp dev_pm_opp_find_freq_exact(struct device dev,
e1f60b29 NM	77	unsigned long freq, bool available)
	78	{
	79	return ERR_PTR(-EINVAL);
	80	}
	81
47d43ba7	82	static inline struct dev_pm_opp dev_pm_opp_find_freq_floor(struct device dev,
e1f60b29 NM	83	unsigned long *freq)
	84	{
	85	return ERR_PTR(-EINVAL);
	86	}
	87
47d43ba7	88	static inline struct dev_pm_opp dev_pm_opp_find_freq_ceil(struct device dev,
e1f60b29 NM	89	unsigned long *freq)
	90	{
	91	return ERR_PTR(-EINVAL);
	92	}
	93
5d4879cd	94	static inline int dev_pm_opp_add(struct device *dev, unsigned long freq,
e1f60b29 NM	95	unsigned long u_volt)
	96	{
	97	return -EINVAL;
	98	}
	99
129eec55 VK	100	static inline void dev_pm_opp_remove(struct device *dev, unsigned long freq)
	101	{
	102	}
	103
5d4879cd	104	static inline int dev_pm_opp_enable(struct device *dev, unsigned long freq)
e1f60b29 NM	105	{
	106	return 0;
	107	}
	108
5d4879cd	109	static inline int dev_pm_opp_disable(struct device *dev, unsigned long freq)
e1f60b29 NM	110	{
	111	return 0;
	112	}
03ca370f	113
5d4879cd NM	114	static inline struct srcu_notifier_head *dev_pm_opp_get_notifier(
5d4879cd NM	115	struct device *dev)
03ca370f MH	116	{
	117	return ERR_PTR(-EINVAL);
	118	}
a96d69d1	119	#endif /* CONFIG_PM_OPP */
e1f60b29	120
d6561bb2 SG	121	#if defined(CONFIG_PM_OPP) && defined(CONFIG_OF)
d6561bb2 SG	122	int of_init_opp_table(struct device *dev);
129eec55	123	void of_free_opp_table(struct device *dev);
8d4d4e98 VK	124	int of_cpumask_init_opp_table(cpumask_var_t cpumask);
	125	void of_cpumask_free_opp_table(cpumask_var_t cpumask);
	126	int of_get_cpus_sharing_opps(struct device *cpu_dev, cpumask_var_t cpumask);
	127	int set_cpus_sharing_opps(struct device *cpu_dev, cpumask_var_t cpumask);
d6561bb2 SG	128	#else
	129	static inline int of_init_opp_table(struct device *dev)
	130	{
	131	return -EINVAL;
	132	}
129eec55 VK	133
	134	static inline void of_free_opp_table(struct device *dev)
	135	{
	136	}
8d4d4e98 VK	137
	138	static inline int of_cpumask_init_opp_table(cpumask_var_t cpumask)
	139	{
	140	return -ENOSYS;
	141	}
	142
	143	static inline void of_cpumask_free_opp_table(cpumask_var_t cpumask)
	144	{
	145	}
	146
	147	static inline int of_get_cpus_sharing_opps(struct device *cpu_dev, cpumask_var_t cpumask)
	148	{
	149	return -ENOSYS;
	150	}
	151
	152	static inline int set_cpus_sharing_opps(struct device *cpu_dev, cpumask_var_t cpumask)
	153	{
	154	return -ENOSYS;
	155	}
d6561bb2 SG	156	#endif
d6561bb2 SG	157
e1f60b29	158	#endif /* __LINUX_OPP_H__ */