[linux-2.6-block.git] / include / linux / pm_domain.h

/*
 * pm_domain.h - Definitions and headers related to device power domains.
 *
 * Copyright (C) 2011 Rafael J. Wysocki <rjw@sisk.pl>, Renesas Electronics Corp.
 *
 * This file is released under the GPLv2.
 */

#ifndef _LINUX_PM_DOMAIN_H
#define _LINUX_PM_DOMAIN_H

#include <linux/device.h>
#include <linux/mutex.h>
#include <linux/pm.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/notifier.h>
#include <linux/cpuidle.h>

/* Defines used for the flags field in the struct generic_pm_domain */
#define GENPD_FLAG_PM_CLK	(1U << 0) /* PM domain uses PM clk */

enum gpd_status {
	GPD_STATE_ACTIVE = 0,	/* PM domain is active */
	GPD_STATE_WAIT_MASTER,	/* PM domain's master is being waited for */
	GPD_STATE_BUSY,		/* Something is happening to the PM domain */
	GPD_STATE_REPEAT,	/* Power off in progress, to be repeated */
	GPD_STATE_POWER_OFF,	/* PM domain is off */
};

struct dev_power_governor {
	bool (*power_down_ok)(struct dev_pm_domain *domain);
	bool (*stop_ok)(struct device *dev);
};

struct gpd_dev_ops {
	int (*start)(struct device *dev);
	int (*stop)(struct device *dev);
	int (*save_state)(struct device *dev);
	int (*restore_state)(struct device *dev);
	bool (*active_wakeup)(struct device *dev);
};

struct gpd_cpuidle_data {
	unsigned int saved_exit_latency;
	struct cpuidle_state *idle_state;
};

struct generic_pm_domain {
	struct dev_pm_domain domain;	/* PM domain operations */
	struct list_head gpd_list_node;	/* Node in the global PM domains list */
	struct list_head master_links;	/* Links with PM domain as a master */
	struct list_head slave_links;	/* Links with PM domain as a slave */
	struct list_head dev_list;	/* List of devices */
	struct mutex lock;
	struct dev_power_governor *gov;
	struct work_struct power_off_work;
	const char *name;
	unsigned int in_progress;	/* Number of devices being suspended now */
	atomic_t sd_count;	/* Number of subdomains with power "on" */
	enum gpd_status status;	/* Current state of the domain */
	wait_queue_head_t status_wait_queue;
	struct task_struct *poweroff_task;	/* Powering off task */
	unsigned int resume_count;	/* Number of devices being resumed */
	unsigned int device_count;	/* Number of devices */
	unsigned int suspended_count;	/* System suspend device counter */
	unsigned int prepared_count;	/* Suspend counter of prepared devices */
	bool suspend_power_off;	/* Power status before system suspend */
	int (*power_off)(struct generic_pm_domain *domain);
	s64 power_off_latency_ns;
	int (*power_on)(struct generic_pm_domain *domain);
	s64 power_on_latency_ns;
	struct gpd_dev_ops dev_ops;
	s64 max_off_time_ns;	/* Maximum allowed "suspended" time. */
	bool max_off_time_changed;
	bool cached_power_down_ok;
	struct gpd_cpuidle_data *cpuidle_data;
	int (*attach_dev)(struct generic_pm_domain *domain,
			  struct device *dev);
	void (*detach_dev)(struct generic_pm_domain *domain,
			   struct device *dev);
	unsigned int flags;		/* Bit field of configs for genpd */
};

static inline struct generic_pm_domain *pd_to_genpd(struct dev_pm_domain *pd)
{
	return container_of(pd, struct generic_pm_domain, domain);
}

struct gpd_link {
	struct generic_pm_domain *master;
	struct list_head master_node;
	struct generic_pm_domain *slave;
	struct list_head slave_node;
};

struct gpd_timing_data {
	s64 stop_latency_ns;
	s64 start_latency_ns;
	s64 save_state_latency_ns;
	s64 restore_state_latency_ns;
	s64 effective_constraint_ns;
	bool constraint_changed;
	bool cached_stop_ok;
};

struct pm_domain_data {
	struct list_head list_node;
	struct device *dev;
};

struct generic_pm_domain_data {
	struct pm_domain_data base;
	struct gpd_timing_data td;
	struct notifier_block nb;
	struct mutex lock;
	unsigned int refcount;
	int need_restore;
};

#ifdef CONFIG_PM_GENERIC_DOMAINS
static inline struct generic_pm_domain_data *to_gpd_data(struct pm_domain_data *pdd)
{
	return container_of(pdd, struct generic_pm_domain_data, base);
}

static inline struct generic_pm_domain_data *dev_gpd_data(struct device *dev)
{
	return to_gpd_data(dev->power.subsys_data->domain_data);
}

extern struct generic_pm_domain *dev_to_genpd(struct device *dev);
extern int __pm_genpd_add_device(struct generic_pm_domain *genpd,
				 struct device *dev,
				 struct gpd_timing_data *td);

extern int __pm_genpd_name_add_device(const char *domain_name,
				      struct device *dev,
				      struct gpd_timing_data *td);

extern int pm_genpd_remove_device(struct generic_pm_domain *genpd,
				  struct device *dev);
extern void pm_genpd_dev_need_restore(struct device *dev, bool val);
extern int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
				  struct generic_pm_domain *new_subdomain);
extern int pm_genpd_add_subdomain_names(const char *master_name,
					const char *subdomain_name);
extern int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
				     struct generic_pm_domain *target);
extern int pm_genpd_attach_cpuidle(struct generic_pm_domain *genpd, int state);
extern int pm_genpd_name_attach_cpuidle(const char *name, int state);
extern int pm_genpd_detach_cpuidle(struct generic_pm_domain *genpd);
extern int pm_genpd_name_detach_cpuidle(const char *name);
extern void pm_genpd_init(struct generic_pm_domain *genpd,
			  struct dev_power_governor *gov, bool is_off);

extern int pm_genpd_poweron(struct generic_pm_domain *genpd);
extern int pm_genpd_name_poweron(const char *domain_name);

extern struct dev_power_governor simple_qos_governor;
extern struct dev_power_governor pm_domain_always_on_gov;
#else

static inline struct generic_pm_domain_data *dev_gpd_data(struct device *dev)
{
	return ERR_PTR(-ENOSYS);
}
static inline struct generic_pm_domain *dev_to_genpd(struct device *dev)
{
	return ERR_PTR(-ENOSYS);
}
static inline int __pm_genpd_add_device(struct generic_pm_domain *genpd,
					struct device *dev,
					struct gpd_timing_data *td)
{
	return -ENOSYS;
}
static inline int __pm_genpd_name_add_device(const char *domain_name,
					     struct device *dev,
					     struct gpd_timing_data *td)
{
	return -ENOSYS;
}
static inline int pm_genpd_remove_device(struct generic_pm_domain *genpd,
					 struct device *dev)
{
	return -ENOSYS;
}
static inline void pm_genpd_dev_need_restore(struct device *dev, bool val) {}
static inline int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
					 struct generic_pm_domain *new_sd)
{
	return -ENOSYS;
}
static inline int pm_genpd_add_subdomain_names(const char *master_name,
					       const char *subdomain_name)
{
	return -ENOSYS;
}
static inline int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
					    struct generic_pm_domain *target)
{
	return -ENOSYS;
}
static inline int pm_genpd_attach_cpuidle(struct generic_pm_domain *genpd, int st)
{
	return -ENOSYS;
}
static inline int pm_genpd_name_attach_cpuidle(const char *name, int state)
{
	return -ENOSYS;
}
static inline int pm_genpd_detach_cpuidle(struct generic_pm_domain *genpd)
{
	return -ENOSYS;
}
static inline int pm_genpd_name_detach_cpuidle(const char *name)
{
	return -ENOSYS;
}
static inline void pm_genpd_init(struct generic_pm_domain *genpd,
				 struct dev_power_governor *gov, bool is_off)
{
}
static inline int pm_genpd_poweron(struct generic_pm_domain *genpd)
{
	return -ENOSYS;
}
static inline int pm_genpd_name_poweron(const char *domain_name)
{
	return -ENOSYS;
}
#define simple_qos_governor NULL
#define pm_domain_always_on_gov NULL
#endif

static inline int pm_genpd_add_device(struct generic_pm_domain *genpd,
				      struct device *dev)
{
	return __pm_genpd_add_device(genpd, dev, NULL);
}

static inline int pm_genpd_name_add_device(const char *domain_name,
					   struct device *dev)
{
	return __pm_genpd_name_add_device(domain_name, dev, NULL);
}

#ifdef CONFIG_PM_GENERIC_DOMAINS_RUNTIME
extern void pm_genpd_poweroff_unused(void);
#else
static inline void pm_genpd_poweroff_unused(void) {}
#endif

#ifdef CONFIG_PM_GENERIC_DOMAINS_SLEEP
extern void pm_genpd_syscore_poweroff(struct device *dev);
extern void pm_genpd_syscore_poweron(struct device *dev);
#else
static inline void pm_genpd_syscore_poweroff(struct device *dev) {}
static inline void pm_genpd_syscore_poweron(struct device *dev) {}
#endif

/* OF PM domain providers */
struct of_device_id;

struct genpd_onecell_data {
	struct generic_pm_domain **domains;
	unsigned int num_domains;
};

typedef struct generic_pm_domain *(*genpd_xlate_t)(struct of_phandle_args *args,
						void *data);

#ifdef CONFIG_PM_GENERIC_DOMAINS_OF
int __of_genpd_add_provider(struct device_node *np, genpd_xlate_t xlate,
			void *data);
void of_genpd_del_provider(struct device_node *np);

struct generic_pm_domain *__of_genpd_xlate_simple(
					struct of_phandle_args *genpdspec,
					void *data);
struct generic_pm_domain *__of_genpd_xlate_onecell(
					struct of_phandle_args *genpdspec,
					void *data);

int genpd_dev_pm_attach(struct device *dev);
#else /* !CONFIG_PM_GENERIC_DOMAINS_OF */
static inline int __of_genpd_add_provider(struct device_node *np,
					genpd_xlate_t xlate, void *data)
{
	return 0;
}
static inline void of_genpd_del_provider(struct device_node *np) {}

#define __of_genpd_xlate_simple		NULL
#define __of_genpd_xlate_onecell	NULL

static inline int genpd_dev_pm_attach(struct device *dev)
{
	return -ENODEV;
}
#endif /* CONFIG_PM_GENERIC_DOMAINS_OF */

static inline int of_genpd_add_provider_simple(struct device_node *np,
					struct generic_pm_domain *genpd)
{
	return __of_genpd_add_provider(np, __of_genpd_xlate_simple, genpd);
}
static inline int of_genpd_add_provider_onecell(struct device_node *np,
					struct genpd_onecell_data *data)
{
	return __of_genpd_add_provider(np, __of_genpd_xlate_onecell, data);
}

#ifdef CONFIG_PM
extern int dev_pm_domain_attach(struct device *dev, bool power_on);
extern void dev_pm_domain_detach(struct device *dev, bool power_off);
#else
static inline int dev_pm_domain_attach(struct device *dev, bool power_on)
{
	return -ENODEV;
}
static inline void dev_pm_domain_detach(struct device *dev, bool power_off) {}
#endif

#endif /* _LINUX_PM_DOMAIN_H */
Commit	Line	Data
f721889f RW	1	/*
	2	* pm_domain.h - Definitions and headers related to device power domains.
	3	*
	4	* Copyright (C) 2011 Rafael J. Wysocki <rjw@sisk.pl>, Renesas Electronics Corp.
	5	*
	6	* This file is released under the GPLv2.
	7	*/
	8
	9	#ifndef _LINUX_PM_DOMAIN_H
	10	#define _LINUX_PM_DOMAIN_H
	11
	12	#include <linux/device.h>
313162d0 PG	13	#include <linux/mutex.h>
313162d0 PG	14	#include <linux/pm.h>
4f042cda	15	#include <linux/err.h>
c8aa130b	16	#include <linux/of.h>
6ff7bb0d	17	#include <linux/notifier.h>
cbc9ef02	18	#include <linux/cpuidle.h>
f721889f	19
c11f6f5b UH	20	/* Defines used for the flags field in the struct generic_pm_domain */
	21	#define GENPD_FLAG_PM_CLK (1U << 0) /* PM domain uses PM clk */
	22
17b75eca RW	23	enum gpd_status {
17b75eca RW	24	GPD_STATE_ACTIVE = 0, /* PM domain is active */
17877eb5	25	GPD_STATE_WAIT_MASTER, /* PM domain's master is being waited for */
17b75eca	26	GPD_STATE_BUSY, /* Something is happening to the PM domain */
c6d22b37	27	GPD_STATE_REPEAT, /* Power off in progress, to be repeated */
17b75eca RW	28	GPD_STATE_POWER_OFF, /* PM domain is off */
17b75eca RW	29	};
596ba34b	30
f721889f RW	31	struct dev_power_governor {
f721889f RW	32	bool (power_down_ok)(struct dev_pm_domain domain);
b02c999a	33	bool (stop_ok)(struct device dev);
f721889f RW	34	};
f721889f RW	35
d5e4cbfe RW	36	struct gpd_dev_ops {
	37	int (start)(struct device dev);
	38	int (stop)(struct device dev);
ecf00475 RW	39	int (save_state)(struct device dev);
ecf00475 RW	40	int (restore_state)(struct device dev);
d5e4cbfe RW	41	bool (active_wakeup)(struct device dev);
	42	};
	43
f39cb179	44	struct gpd_cpuidle_data {
cbc9ef02 RW	45	unsigned int saved_exit_latency;
	46	struct cpuidle_state *idle_state;
	47	};
	48
f721889f RW	49	struct generic_pm_domain {
f721889f RW	50	struct dev_pm_domain domain; /* PM domain operations */
5125bbf3	51	struct list_head gpd_list_node; /* Node in the global PM domains list */
5063ce15 RW	52	struct list_head master_links; /* Links with PM domain as a master */
5063ce15 RW	53	struct list_head slave_links; /* Links with PM domain as a slave */
f721889f RW	54	struct list_head dev_list; /* List of devices */
	55	struct mutex lock;
	56	struct dev_power_governor *gov;
	57	struct work_struct power_off_work;
d07e9c17	58	const char *name;
f721889f	59	unsigned int in_progress; /* Number of devices being suspended now */
c4bb3160	60	atomic_t sd_count; /* Number of subdomains with power "on" */
17b75eca RW	61	enum gpd_status status; /* Current state of the domain */
17b75eca RW	62	wait_queue_head_t status_wait_queue;
c6d22b37 RW	63	struct task_struct poweroff_task; / Powering off task */
c6d22b37 RW	64	unsigned int resume_count; /* Number of devices being resumed */
596ba34b RW	65	unsigned int device_count; /* Number of devices */
	66	unsigned int suspended_count; /* System suspend device counter */
	67	unsigned int prepared_count; /* Suspend counter of prepared devices */
	68	bool suspend_power_off; /* Power status before system suspend */
f721889f	69	int (power_off)(struct generic_pm_domain domain);
221e9b58	70	s64 power_off_latency_ns;
f721889f	71	int (power_on)(struct generic_pm_domain domain);
221e9b58	72	s64 power_on_latency_ns;
d5e4cbfe	73	struct gpd_dev_ops dev_ops;
221e9b58	74	s64 max_off_time_ns; /* Maximum allowed "suspended" time. */
6ff7bb0d RW	75	bool max_off_time_changed;
6ff7bb0d RW	76	bool cached_power_down_ok;
f39cb179	77	struct gpd_cpuidle_data *cpuidle_data;
c16561e8 UH	78	int (attach_dev)(struct generic_pm_domain domain,
	79	struct device *dev);
	80	void (detach_dev)(struct generic_pm_domain domain,
	81	struct device *dev);
c11f6f5b	82	unsigned int flags; /* Bit field of configs for genpd */
f721889f RW	83	};
f721889f RW	84
596ba34b RW	85	static inline struct generic_pm_domain pd_to_genpd(struct dev_pm_domain pd)
	86	{
	87	return container_of(pd, struct generic_pm_domain, domain);
	88	}
	89
5063ce15 RW	90	struct gpd_link {
	91	struct generic_pm_domain *master;
	92	struct list_head master_node;
	93	struct generic_pm_domain *slave;
	94	struct list_head slave_node;
	95	};
	96
b02c999a RW	97	struct gpd_timing_data {
	98	s64 stop_latency_ns;
	99	s64 start_latency_ns;
221e9b58 RW	100	s64 save_state_latency_ns;
221e9b58 RW	101	s64 restore_state_latency_ns;
a5bef810	102	s64 effective_constraint_ns;
6ff7bb0d RW	103	bool constraint_changed;
6ff7bb0d RW	104	bool cached_stop_ok;
b02c999a RW	105	};
b02c999a RW	106
00e7c295 UH	107	struct pm_domain_data {
	108	struct list_head list_node;
	109	struct device *dev;
	110	};
	111
cd0ea672 RW	112	struct generic_pm_domain_data {
cd0ea672 RW	113	struct pm_domain_data base;
b02c999a	114	struct gpd_timing_data td;
6ff7bb0d RW	115	struct notifier_block nb;
6ff7bb0d RW	116	struct mutex lock;
1d5fcfec	117	unsigned int refcount;
67732cd3	118	int need_restore;
cd0ea672 RW	119	};
cd0ea672 RW	120
9b4f617b	121	#ifdef CONFIG_PM_GENERIC_DOMAINS
cd0ea672 RW	122	static inline struct generic_pm_domain_data to_gpd_data(struct pm_domain_data pdd)
	123	{
	124	return container_of(pdd, struct generic_pm_domain_data, base);
	125	}
	126
d5e4cbfe RW	127	static inline struct generic_pm_domain_data dev_gpd_data(struct device dev)
	128	{
	129	return to_gpd_data(dev->power.subsys_data->domain_data);
	130	}
	131
b02c999a RW	132	extern struct generic_pm_domain dev_to_genpd(struct device dev);
	133	extern int __pm_genpd_add_device(struct generic_pm_domain *genpd,
	134	struct device *dev,
	135	struct gpd_timing_data *td);
	136
b5abb085 RW	137	extern int __pm_genpd_name_add_device(const char *domain_name,
	138	struct device *dev,
	139	struct gpd_timing_data *td);
c8aa130b	140
f721889f RW	141	extern int pm_genpd_remove_device(struct generic_pm_domain *genpd,
f721889f RW	142	struct device *dev);
ca1d72f0	143	extern void pm_genpd_dev_need_restore(struct device *dev, bool val);
f721889f RW	144	extern int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
f721889f RW	145	struct generic_pm_domain *new_subdomain);
fb7268be RW	146	extern int pm_genpd_add_subdomain_names(const char *master_name,
fb7268be RW	147	const char *subdomain_name);
f721889f RW	148	extern int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
f721889f RW	149	struct generic_pm_domain *target);
40114447	150	extern int pm_genpd_attach_cpuidle(struct generic_pm_domain *genpd, int state);
74a2799a	151	extern int pm_genpd_name_attach_cpuidle(const char *name, int state);
40114447	152	extern int pm_genpd_detach_cpuidle(struct generic_pm_domain *genpd);
74a2799a	153	extern int pm_genpd_name_detach_cpuidle(const char *name);
f721889f RW	154	extern void pm_genpd_init(struct generic_pm_domain *genpd,
f721889f RW	155	struct dev_power_governor *gov, bool is_off);
b02c999a	156
18b4f3f5	157	extern int pm_genpd_poweron(struct generic_pm_domain *genpd);
8bc0251d	158	extern int pm_genpd_name_poweron(const char *domain_name);
b02c999a	159
ae3c511c	160	extern struct dev_power_governor simple_qos_governor;
925b44a2	161	extern struct dev_power_governor pm_domain_always_on_gov;
f721889f	162	#else
b02c999a	163
b642631d MD	164	static inline struct generic_pm_domain_data dev_gpd_data(struct device dev)
	165	{
	166	return ERR_PTR(-ENOSYS);
	167	}
b02c999a RW	168	static inline struct generic_pm_domain dev_to_genpd(struct device dev)
	169	{
	170	return ERR_PTR(-ENOSYS);
	171	}
	172	static inline int __pm_genpd_add_device(struct generic_pm_domain *genpd,
	173	struct device *dev,
	174	struct gpd_timing_data *td)
	175	{
	176	return -ENOSYS;
	177	}
b5abb085 RW	178	static inline int __pm_genpd_name_add_device(const char *domain_name,
	179	struct device *dev,
	180	struct gpd_timing_data *td)
f721889f RW	181	{
	182	return -ENOSYS;
	183	}
	184	static inline int pm_genpd_remove_device(struct generic_pm_domain *genpd,
	185	struct device *dev)
	186	{
	187	return -ENOSYS;
	188	}
ca1d72f0	189	static inline void pm_genpd_dev_need_restore(struct device *dev, bool val) {}
f721889f RW	190	static inline int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
	191	struct generic_pm_domain *new_sd)
	192	{
	193	return -ENOSYS;
	194	}
fb7268be RW	195	static inline int pm_genpd_add_subdomain_names(const char *master_name,
	196	const char *subdomain_name)
	197	{
	198	return -ENOSYS;
	199	}
f721889f RW	200	static inline int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
	201	struct generic_pm_domain *target)
	202	{
	203	return -ENOSYS;
	204	}
40114447	205	static inline int pm_genpd_attach_cpuidle(struct generic_pm_domain *genpd, int st)
cbc9ef02 RW	206	{
	207	return -ENOSYS;
	208	}
74a2799a RW	209	static inline int pm_genpd_name_attach_cpuidle(const char *name, int state)
	210	{
	211	return -ENOSYS;
	212	}
40114447	213	static inline int pm_genpd_detach_cpuidle(struct generic_pm_domain *genpd)
cbc9ef02 RW	214	{
	215	return -ENOSYS;
	216	}
74a2799a RW	217	static inline int pm_genpd_name_detach_cpuidle(const char *name)
	218	{
	219	return -ENOSYS;
	220	}
b642631d MD	221	static inline void pm_genpd_init(struct generic_pm_domain *genpd,
b642631d MD	222	struct dev_power_governor *gov, bool is_off)
b02c999a RW	223	{
b02c999a RW	224	}
18b4f3f5 MD	225	static inline int pm_genpd_poweron(struct generic_pm_domain *genpd)
	226	{
	227	return -ENOSYS;
	228	}
8bc0251d RW	229	static inline int pm_genpd_name_poweron(const char *domain_name)
	230	{
	231	return -ENOSYS;
	232	}
b642631d	233	#define simple_qos_governor NULL
925b44a2	234	#define pm_domain_always_on_gov NULL
17f2ae7f RW	235	#endif
17f2ae7f RW	236
b5abb085 RW	237	static inline int pm_genpd_add_device(struct generic_pm_domain *genpd,
	238	struct device *dev)
	239	{
	240	return __pm_genpd_add_device(genpd, dev, NULL);
	241	}
	242
b5abb085 RW	243	static inline int pm_genpd_name_add_device(const char *domain_name,
	244	struct device *dev)
	245	{
	246	return __pm_genpd_name_add_device(domain_name, dev, NULL);
	247	}
	248
17f2ae7f	249	#ifdef CONFIG_PM_GENERIC_DOMAINS_RUNTIME
17f2ae7f RW	250	extern void pm_genpd_poweroff_unused(void);
17f2ae7f RW	251	#else
17f2ae7f	252	static inline void pm_genpd_poweroff_unused(void) {}
f721889f RW	253	#endif
f721889f RW	254
77f827de	255	#ifdef CONFIG_PM_GENERIC_DOMAINS_SLEEP
d47e6464 UH	256	extern void pm_genpd_syscore_poweroff(struct device *dev);
d47e6464 UH	257	extern void pm_genpd_syscore_poweron(struct device *dev);
77f827de	258	#else
d47e6464 UH	259	static inline void pm_genpd_syscore_poweroff(struct device *dev) {}
d47e6464 UH	260	static inline void pm_genpd_syscore_poweron(struct device *dev) {}
77f827de RW	261	#endif
77f827de RW	262
aa42240a TF	263	/* OF PM domain providers */
	264	struct of_device_id;
	265
	266	struct genpd_onecell_data {
	267	struct generic_pm_domain **domains;
	268	unsigned int num_domains;
	269	};
	270
	271	typedef struct generic_pm_domain (genpd_xlate_t)(struct of_phandle_args *args,
	272	void *data);
	273
	274	#ifdef CONFIG_PM_GENERIC_DOMAINS_OF
	275	int __of_genpd_add_provider(struct device_node *np, genpd_xlate_t xlate,
	276	void *data);
	277	void of_genpd_del_provider(struct device_node *np);
	278
	279	struct generic_pm_domain *__of_genpd_xlate_simple(
	280	struct of_phandle_args *genpdspec,
	281	void *data);
	282	struct generic_pm_domain *__of_genpd_xlate_onecell(
	283	struct of_phandle_args *genpdspec,
	284	void *data);
	285
	286	int genpd_dev_pm_attach(struct device *dev);
	287	#else /* !CONFIG_PM_GENERIC_DOMAINS_OF */
	288	static inline int __of_genpd_add_provider(struct device_node *np,
	289	genpd_xlate_t xlate, void *data)
	290	{
	291	return 0;
	292	}
	293	static inline void of_genpd_del_provider(struct device_node *np) {}
	294
	295	#define __of_genpd_xlate_simple NULL
	296	#define __of_genpd_xlate_onecell NULL
	297
	298	static inline int genpd_dev_pm_attach(struct device *dev)
	299	{
	300	return -ENODEV;
	301	}
	302	#endif /* CONFIG_PM_GENERIC_DOMAINS_OF */
	303
	304	static inline int of_genpd_add_provider_simple(struct device_node *np,
	305	struct generic_pm_domain *genpd)
	306	{
	307	return __of_genpd_add_provider(np, __of_genpd_xlate_simple, genpd);
	308	}
	309	static inline int of_genpd_add_provider_onecell(struct device_node *np,
	310	struct genpd_onecell_data *data)
	311	{
	312	return __of_genpd_add_provider(np, __of_genpd_xlate_onecell, data);
	313	}
	314
f48c767c UH	315	#ifdef CONFIG_PM
	316	extern int dev_pm_domain_attach(struct device *dev, bool power_on);
	317	extern void dev_pm_domain_detach(struct device *dev, bool power_off);
	318	#else
	319	static inline int dev_pm_domain_attach(struct device *dev, bool power_on)
	320	{
	321	return -ENODEV;
	322	}
	323	static inline void dev_pm_domain_detach(struct device *dev, bool power_off) {}
	324	#endif
	325
f721889f	326	#endif /* _LINUX_PM_DOMAIN_H */