[linux-2.6-block.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);

bool dev_pm_opp_is_turbo(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);
unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev);
unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev);
struct dev_pm_opp *dev_pm_opp_get_suspend_opp(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);
int dev_pm_opp_set_supported_hw(struct device *dev, const u32 *versions,
				unsigned int count);
void dev_pm_opp_put_supported_hw(struct device *dev);
int dev_pm_opp_set_prop_name(struct device *dev, const char *name);
void dev_pm_opp_put_prop_name(struct device *dev);
int dev_pm_opp_set_regulator(struct device *dev, const char *name);
void dev_pm_opp_put_regulator(struct device *dev);
int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq);
int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, const struct cpumask *cpumask);
int dev_pm_opp_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask);
void dev_pm_opp_remove_table(struct device *dev);
void dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask);
#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 bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp)
{
	return false;
}

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 unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev)
{
	return 0;
}

static inline unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev)
{
	return 0;
}

static inline struct dev_pm_opp *dev_pm_opp_get_suspend_opp(struct device *dev)
{
	return NULL;
}

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

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

static inline struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
					unsigned long *freq)
{
	return ERR_PTR(-ENOTSUPP);
}

static inline int dev_pm_opp_add(struct device *dev, unsigned long freq,
					unsigned long u_volt)
{
	return -ENOTSUPP;
}

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(-ENOTSUPP);
}

static inline int dev_pm_opp_set_supported_hw(struct device *dev,
					      const u32 *versions,
					      unsigned int count)
{
	return -ENOTSUPP;
}

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

static inline int dev_pm_opp_set_prop_name(struct device *dev, const char *name)
{
	return -ENOTSUPP;
}

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

static inline int dev_pm_opp_set_regulator(struct device *dev, const char *name)
{
	return -ENOTSUPP;
}

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

static inline int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq)
{
	return -ENOTSUPP;
}

static inline int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, const struct cpumask *cpumask)
{
	return -ENOTSUPP;
}

static inline int dev_pm_opp_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask)
{
	return -EINVAL;
}

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

static inline void dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask)
{
}

#endif		/* CONFIG_PM_OPP */

#if defined(CONFIG_PM_OPP) && defined(CONFIG_OF)
int dev_pm_opp_of_add_table(struct device *dev);
void dev_pm_opp_of_remove_table(struct device *dev);
int dev_pm_opp_of_cpumask_add_table(const struct cpumask *cpumask);
void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask);
int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask);
#else
static inline int dev_pm_opp_of_add_table(struct device *dev)
{
	return -ENOTSUPP;
}

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

static inline int dev_pm_opp_of_cpumask_add_table(const struct cpumask *cpumask)
{
	return -ENOTSUPP;
}

static inline void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask)
{
}

static inline int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask)
{
	return -ENOTSUPP;
}
#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
19445b25 BZ	33	bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp);
19445b25 BZ	34
5d4879cd	35	int dev_pm_opp_get_opp_count(struct device *dev);
3ca9bb33	36	unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev);
655c9df9	37	unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev);
21743447	38	unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev);
4eafbd15	39	struct dev_pm_opp dev_pm_opp_get_suspend_opp(struct device dev);
e1f60b29	40
47d43ba7 NM	41	struct dev_pm_opp dev_pm_opp_find_freq_exact(struct device dev,
	42	unsigned long freq,
	43	bool available);
e1f60b29	44
47d43ba7 NM	45	struct dev_pm_opp dev_pm_opp_find_freq_floor(struct device dev,
47d43ba7 NM	46	unsigned long *freq);
e1f60b29	47
47d43ba7 NM	48	struct dev_pm_opp dev_pm_opp_find_freq_ceil(struct device dev,
47d43ba7 NM	49	unsigned long *freq);
e1f60b29	50
5d4879cd NM	51	int dev_pm_opp_add(struct device *dev, unsigned long freq,
5d4879cd NM	52	unsigned long u_volt);
129eec55	53	void dev_pm_opp_remove(struct device *dev, unsigned long freq);
e1f60b29	54
5d4879cd	55	int dev_pm_opp_enable(struct device *dev, unsigned long freq);
e1f60b29	56
5d4879cd	57	int dev_pm_opp_disable(struct device *dev, unsigned long freq);
e1f60b29	58
5d4879cd	59	struct srcu_notifier_head dev_pm_opp_get_notifier(struct device dev);
7de36b0a VK	60	int dev_pm_opp_set_supported_hw(struct device dev, const u32 versions,
	61	unsigned int count);
	62	void dev_pm_opp_put_supported_hw(struct device *dev);
01fb4d3c VK	63	int dev_pm_opp_set_prop_name(struct device dev, const char name);
01fb4d3c VK	64	void dev_pm_opp_put_prop_name(struct device *dev);
9f8ea969 VK	65	int dev_pm_opp_set_regulator(struct device dev, const char name);
9f8ea969 VK	66	void dev_pm_opp_put_regulator(struct device *dev);
6a0712f6	67	int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq);
ddbb74bc AB	68	int dev_pm_opp_set_sharing_cpus(struct device cpu_dev, const struct cpumask cpumask);
ddbb74bc AB	69	int dev_pm_opp_get_sharing_cpus(struct device cpu_dev, struct cpumask cpumask);
411466c5 SH	70	void dev_pm_opp_remove_table(struct device *dev);
411466c5 SH	71	void dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask);
e1f60b29	72	#else
47d43ba7	73	static inline unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp)
e1f60b29 NM	74	{
	75	return 0;
	76	}
	77
47d43ba7	78	static inline unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp)
e1f60b29 NM	79	{
	80	return 0;
	81	}
	82
19445b25 BZ	83	static inline bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp)
	84	{
	85	return false;
	86	}
	87
5d4879cd	88	static inline int dev_pm_opp_get_opp_count(struct device *dev)
e1f60b29 NM	89	{
	90	return 0;
	91	}
	92
3ca9bb33 VK	93	static inline unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev)
	94	{
	95	return 0;
	96	}
	97
655c9df9 VK	98	static inline unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev)
	99	{
	100	return 0;
	101	}
	102
21743447 VK	103	static inline unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev)
	104	{
	105	return 0;
	106	}
	107
4eafbd15 BZ	108	static inline struct dev_pm_opp dev_pm_opp_get_suspend_opp(struct device dev)
	109	{
	110	return NULL;
	111	}
	112
47d43ba7	113	static inline struct dev_pm_opp dev_pm_opp_find_freq_exact(struct device dev,
e1f60b29 NM	114	unsigned long freq, bool available)
e1f60b29 NM	115	{
d708b384	116	return ERR_PTR(-ENOTSUPP);
e1f60b29 NM	117	}
e1f60b29 NM	118
47d43ba7	119	static inline struct dev_pm_opp dev_pm_opp_find_freq_floor(struct device dev,
e1f60b29 NM	120	unsigned long *freq)
e1f60b29 NM	121	{
d708b384	122	return ERR_PTR(-ENOTSUPP);
e1f60b29 NM	123	}
e1f60b29 NM	124
47d43ba7	125	static inline struct dev_pm_opp dev_pm_opp_find_freq_ceil(struct device dev,
e1f60b29 NM	126	unsigned long *freq)
e1f60b29 NM	127	{
d708b384	128	return ERR_PTR(-ENOTSUPP);
e1f60b29 NM	129	}
e1f60b29 NM	130
5d4879cd	131	static inline int dev_pm_opp_add(struct device *dev, unsigned long freq,
e1f60b29 NM	132	unsigned long u_volt)
e1f60b29 NM	133	{
d708b384	134	return -ENOTSUPP;
e1f60b29 NM	135	}
e1f60b29 NM	136
129eec55 VK	137	static inline void dev_pm_opp_remove(struct device *dev, unsigned long freq)
	138	{
	139	}
	140
5d4879cd	141	static inline int dev_pm_opp_enable(struct device *dev, unsigned long freq)
e1f60b29 NM	142	{
	143	return 0;
	144	}
	145
5d4879cd	146	static inline int dev_pm_opp_disable(struct device *dev, unsigned long freq)
e1f60b29 NM	147	{
	148	return 0;
	149	}
03ca370f	150
5d4879cd NM	151	static inline struct srcu_notifier_head *dev_pm_opp_get_notifier(
5d4879cd NM	152	struct device *dev)
03ca370f	153	{
d708b384	154	return ERR_PTR(-ENOTSUPP);
03ca370f	155	}
7de36b0a VK	156
	157	static inline int dev_pm_opp_set_supported_hw(struct device *dev,
	158	const u32 *versions,
	159	unsigned int count)
	160	{
d708b384	161	return -ENOTSUPP;
7de36b0a VK	162	}
	163
	164	static inline void dev_pm_opp_put_supported_hw(struct device *dev) {}
	165
01fb4d3c VK	166	static inline int dev_pm_opp_set_prop_name(struct device dev, const char name)
01fb4d3c VK	167	{
d708b384	168	return -ENOTSUPP;
01fb4d3c VK	169	}
	170
	171	static inline void dev_pm_opp_put_prop_name(struct device *dev) {}
	172
9f8ea969 VK	173	static inline int dev_pm_opp_set_regulator(struct device dev, const char name)
9f8ea969 VK	174	{
d708b384	175	return -ENOTSUPP;
9f8ea969 VK	176	}
	177
	178	static inline void dev_pm_opp_put_regulator(struct device *dev) {}
	179
6a0712f6 VK	180	static inline int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq)
6a0712f6 VK	181	{
d708b384	182	return -ENOTSUPP;
6a0712f6 VK	183	}
6a0712f6 VK	184
ddbb74bc	185	static inline int dev_pm_opp_set_sharing_cpus(struct device cpu_dev, const struct cpumask cpumask)
642aa8ce	186	{
d708b384	187	return -ENOTSUPP;
642aa8ce VK	188	}
642aa8ce VK	189
ddbb74bc	190	static inline int dev_pm_opp_get_sharing_cpus(struct device cpu_dev, struct cpumask cpumask)
6f707daa VK	191	{
	192	return -EINVAL;
	193	}
	194
411466c5 SH	195	static inline void dev_pm_opp_remove_table(struct device *dev)
	196	{
	197	}
	198
	199	static inline void dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask)
	200	{
	201	}
	202
a96d69d1	203	#endif /* CONFIG_PM_OPP */
e1f60b29	204
d6561bb2	205	#if defined(CONFIG_PM_OPP) && defined(CONFIG_OF)
8f8d37b2 VK	206	int dev_pm_opp_of_add_table(struct device *dev);
8f8d37b2 VK	207	void dev_pm_opp_of_remove_table(struct device *dev);
ddbb74bc AB	208	int dev_pm_opp_of_cpumask_add_table(const struct cpumask *cpumask);
	209	void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask);
	210	int dev_pm_opp_of_get_sharing_cpus(struct device cpu_dev, struct cpumask cpumask);
d6561bb2	211	#else
8f8d37b2	212	static inline int dev_pm_opp_of_add_table(struct device *dev)
d6561bb2	213	{
d708b384	214	return -ENOTSUPP;
d6561bb2	215	}
129eec55	216
8f8d37b2	217	static inline void dev_pm_opp_of_remove_table(struct device *dev)
129eec55 VK	218	{
129eec55 VK	219	}
8d4d4e98	220
ddbb74bc	221	static inline int dev_pm_opp_of_cpumask_add_table(const struct cpumask *cpumask)
8d4d4e98	222	{
d708b384	223	return -ENOTSUPP;
8d4d4e98 VK	224	}
8d4d4e98 VK	225
ddbb74bc	226	static inline void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask)
8d4d4e98 VK	227	{
	228	}
	229
ddbb74bc	230	static inline int dev_pm_opp_of_get_sharing_cpus(struct device cpu_dev, struct cpumask cpumask)
8d4d4e98	231	{
d708b384	232	return -ENOTSUPP;
8d4d4e98	233	}
d6561bb2 SG	234	#endif
d6561bb2 SG	235
e1f60b29	236	#endif /* __LINUX_OPP_H__ */