[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/spinlock.h>
#include <linux/cpumask.h>

/*
 * Flags to control the behaviour of a genpd.
 *
 * These flags may be set in the struct generic_pm_domain's flags field by a
 * genpd backend driver. The flags must be set before it calls pm_genpd_init(),
 * which initializes a genpd.
 *
 * GENPD_FLAG_PM_CLK:		Instructs genpd to use the PM clk framework,
 *				while powering on/off attached devices.
 *
 * GENPD_FLAG_IRQ_SAFE:		This informs genpd that its backend callbacks,
 *				->power_on|off(), doesn't sleep. Hence, these
 *				can be invoked from within atomic context, which
 *				enables genpd to power on/off the PM domain,
 *				even when pm_runtime_is_irq_safe() returns true,
 *				for any of its attached devices. Note that, a
 *				genpd having this flag set, requires its
 *				masterdomains to also have it set.
 *
 * GENPD_FLAG_ALWAYS_ON:	Instructs genpd to always keep the PM domain
 *				powered on.
 *
 * GENPD_FLAG_ACTIVE_WAKEUP:	Instructs genpd to keep the PM domain powered
 *				on, in case any of its attached devices is used
 *				in the wakeup path to serve system wakeups.
 *
 * GENPD_FLAG_CPU_DOMAIN:	Instructs genpd that it should expect to get
 *				devices attached, which may belong to CPUs or
 *				possibly have subdomains with CPUs attached.
 *				This flag enables the genpd backend driver to
 *				deploy idle power management support for CPUs
 *				and groups of CPUs. Note that, the backend
 *				driver must then comply with the so called,
 *				last-man-standing algorithm, for the CPUs in the
 *				PM domain.
 */
#define GENPD_FLAG_PM_CLK	 (1U << 0)
#define GENPD_FLAG_IRQ_SAFE	 (1U << 1)
#define GENPD_FLAG_ALWAYS_ON	 (1U << 2)
#define GENPD_FLAG_ACTIVE_WAKEUP (1U << 3)
#define GENPD_FLAG_CPU_DOMAIN	 (1U << 4)

enum gpd_status {
	GPD_STATE_ACTIVE = 0,	/* PM domain is active */
	GPD_STATE_POWER_OFF,	/* PM domain is off */
};

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

struct gpd_dev_ops {
	int (*start)(struct device *dev);
	int (*stop)(struct device *dev);
};

struct genpd_power_state {
	s64 power_off_latency_ns;
	s64 power_on_latency_ns;
	s64 residency_ns;
	struct fwnode_handle *fwnode;
	ktime_t idle_time;
	void *data;
};

struct genpd_lock_ops;
struct dev_pm_opp;
struct opp_table;

struct generic_pm_domain {
	struct device dev;
	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 dev_power_governor *gov;
	struct work_struct power_off_work;
	struct fwnode_handle *provider;	/* Identity of the domain provider */
	bool has_provider;
	const char *name;
	atomic_t sd_count;	/* Number of subdomains with power "on" */
	enum gpd_status status;	/* Current state of the domain */
	unsigned int device_count;	/* Number of devices */
	unsigned int suspended_count;	/* System suspend device counter */
	unsigned int prepared_count;	/* Suspend counter of prepared devices */
	unsigned int performance_state;	/* Aggregated max performance state */
	cpumask_var_t cpus;		/* A cpumask of the attached CPUs */
	int (*power_off)(struct generic_pm_domain *domain);
	int (*power_on)(struct generic_pm_domain *domain);
	struct opp_table *opp_table;	/* OPP table of the genpd */
	unsigned int (*opp_to_performance_state)(struct generic_pm_domain *genpd,
						 struct dev_pm_opp *opp);
	int (*set_performance_state)(struct generic_pm_domain *genpd,
				     unsigned int state);
	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;
	bool cached_power_down_state_idx;
	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 */
	struct genpd_power_state *states;
	void (*free_states)(struct genpd_power_state *states,
			    unsigned int state_count);
	unsigned int state_count; /* number of states */
	unsigned int state_idx; /* state that genpd will go to when off */
	ktime_t on_time;
	ktime_t accounting_time;
	const struct genpd_lock_ops *lock_ops;
	union {
		struct mutex mlock;
		struct {
			spinlock_t slock;
			unsigned long lock_flags;
		};
	};

};

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;

	/* Sub-domain's per-master domain performance state */
	unsigned int performance_state;
	unsigned int prev_performance_state;
};

struct gpd_timing_data {
	s64 suspend_latency_ns;
	s64 resume_latency_ns;
	s64 effective_constraint_ns;
	bool constraint_changed;
	bool cached_suspend_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;
	unsigned int performance_state;
	void *data;
};

#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);
}

int pm_genpd_add_device(struct generic_pm_domain *genpd, struct device *dev);
int pm_genpd_remove_device(struct device *dev);
int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
			   struct generic_pm_domain *new_subdomain);
int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
			      struct generic_pm_domain *target);
int pm_genpd_init(struct generic_pm_domain *genpd,
		  struct dev_power_governor *gov, bool is_off);
int pm_genpd_remove(struct generic_pm_domain *genpd);
int dev_pm_genpd_set_performance_state(struct device *dev, unsigned int state);

extern struct dev_power_governor simple_qos_governor;
extern struct dev_power_governor pm_domain_always_on_gov;
#ifdef CONFIG_CPU_IDLE
extern struct dev_power_governor pm_domain_cpu_gov;
#endif
#else

static inline struct generic_pm_domain_data *dev_gpd_data(struct device *dev)
{
	return ERR_PTR(-ENOSYS);
}
static inline int pm_genpd_add_device(struct generic_pm_domain *genpd,
				      struct device *dev)
{
	return -ENOSYS;
}
static inline int pm_genpd_remove_device(struct device *dev)
{
	return -ENOSYS;
}
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_remove_subdomain(struct generic_pm_domain *genpd,
					    struct generic_pm_domain *target)
{
	return -ENOSYS;
}
static inline int pm_genpd_init(struct generic_pm_domain *genpd,
				struct dev_power_governor *gov, bool is_off)
{
	return -ENOSYS;
}
static inline int pm_genpd_remove(struct generic_pm_domain *genpd)
{
	return -ENOTSUPP;
}

static inline int dev_pm_genpd_set_performance_state(struct device *dev,
						     unsigned int state)
{
	return -ENOTSUPP;
}

#define simple_qos_governor		(*(struct dev_power_governor *)(NULL))
#define pm_domain_always_on_gov		(*(struct dev_power_governor *)(NULL))
#endif

#ifdef CONFIG_PM_GENERIC_DOMAINS_SLEEP
void pm_genpd_syscore_poweroff(struct device *dev);
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;

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

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

#ifdef CONFIG_PM_GENERIC_DOMAINS_OF
int of_genpd_add_provider_simple(struct device_node *np,
				 struct generic_pm_domain *genpd);
int of_genpd_add_provider_onecell(struct device_node *np,
				  struct genpd_onecell_data *data);
void of_genpd_del_provider(struct device_node *np);
int of_genpd_add_device(struct of_phandle_args *args, struct device *dev);
int of_genpd_add_subdomain(struct of_phandle_args *parent,
			   struct of_phandle_args *new_subdomain);
struct generic_pm_domain *of_genpd_remove_last(struct device_node *np);
int of_genpd_parse_idle_states(struct device_node *dn,
			       struct genpd_power_state **states, int *n);
unsigned int pm_genpd_opp_to_performance_state(struct device *genpd_dev,
					       struct dev_pm_opp *opp);

int genpd_dev_pm_attach(struct device *dev);
struct device *genpd_dev_pm_attach_by_id(struct device *dev,
					 unsigned int index);
struct device *genpd_dev_pm_attach_by_name(struct device *dev,
					   const char *name);
#else /* !CONFIG_PM_GENERIC_DOMAINS_OF */
static inline int of_genpd_add_provider_simple(struct device_node *np,
					struct generic_pm_domain *genpd)
{
	return -ENOTSUPP;
}

static inline int of_genpd_add_provider_onecell(struct device_node *np,
					struct genpd_onecell_data *data)
{
	return -ENOTSUPP;
}

static inline void of_genpd_del_provider(struct device_node *np) {}

static inline int of_genpd_add_device(struct of_phandle_args *args,
				      struct device *dev)
{
	return -ENODEV;
}

static inline int of_genpd_add_subdomain(struct of_phandle_args *parent,
					 struct of_phandle_args *new_subdomain)
{
	return -ENODEV;
}

static inline int of_genpd_parse_idle_states(struct device_node *dn,
			struct genpd_power_state **states, int *n)
{
	return -ENODEV;
}

static inline unsigned int
pm_genpd_opp_to_performance_state(struct device *genpd_dev,
				  struct dev_pm_opp *opp)
{
	return 0;
}

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

static inline struct device *genpd_dev_pm_attach_by_id(struct device *dev,
						       unsigned int index)
{
	return NULL;
}

static inline struct device *genpd_dev_pm_attach_by_name(struct device *dev,
							 const char *name)
{
	return NULL;
}

static inline
struct generic_pm_domain *of_genpd_remove_last(struct device_node *np)
{
	return ERR_PTR(-ENOTSUPP);
}
#endif /* CONFIG_PM_GENERIC_DOMAINS_OF */

#ifdef CONFIG_PM
int dev_pm_domain_attach(struct device *dev, bool power_on);
struct device *dev_pm_domain_attach_by_id(struct device *dev,
					  unsigned int index);
struct device *dev_pm_domain_attach_by_name(struct device *dev,
					    const char *name);
void dev_pm_domain_detach(struct device *dev, bool power_off);
void dev_pm_domain_set(struct device *dev, struct dev_pm_domain *pd);
#else
static inline int dev_pm_domain_attach(struct device *dev, bool power_on)
{
	return 0;
}
static inline struct device *dev_pm_domain_attach_by_id(struct device *dev,
							unsigned int index)
{
	return NULL;
}
static inline struct device *dev_pm_domain_attach_by_name(struct device *dev,
							  const char *name)
{
	return NULL;
}
static inline void dev_pm_domain_detach(struct device *dev, bool power_off) {}
static inline void dev_pm_domain_set(struct device *dev,
				     struct dev_pm_domain *pd) {}
#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>
d716f479	18	#include <linux/spinlock.h>
eb594b73	19	#include <linux/cpumask.h>
f721889f	20
e5089c2c UH	21	/*
	22	* Flags to control the behaviour of a genpd.
	23	*
	24	* These flags may be set in the struct generic_pm_domain's flags field by a
	25	* genpd backend driver. The flags must be set before it calls pm_genpd_init(),
	26	* which initializes a genpd.
	27	*
	28	* GENPD_FLAG_PM_CLK: Instructs genpd to use the PM clk framework,
	29	* while powering on/off attached devices.
	30	*
	31	* GENPD_FLAG_IRQ_SAFE: This informs genpd that its backend callbacks,
	32	* ->power_on\|off(), doesn't sleep. Hence, these
	33	* can be invoked from within atomic context, which
	34	* enables genpd to power on/off the PM domain,
	35	* even when pm_runtime_is_irq_safe() returns true,
	36	* for any of its attached devices. Note that, a
	37	* genpd having this flag set, requires its
	38	* masterdomains to also have it set.
	39	*
	40	* GENPD_FLAG_ALWAYS_ON: Instructs genpd to always keep the PM domain
	41	* powered on.
	42	*
	43	* GENPD_FLAG_ACTIVE_WAKEUP: Instructs genpd to keep the PM domain powered
	44	* on, in case any of its attached devices is used
	45	* in the wakeup path to serve system wakeups.
eb594b73 UH	46	*
	47	* GENPD_FLAG_CPU_DOMAIN: Instructs genpd that it should expect to get
	48	* devices attached, which may belong to CPUs or
	49	* possibly have subdomains with CPUs attached.
	50	* This flag enables the genpd backend driver to
	51	* deploy idle power management support for CPUs
	52	* and groups of CPUs. Note that, the backend
	53	* driver must then comply with the so called,
	54	* last-man-standing algorithm, for the CPUs in the
	55	* PM domain.
e5089c2c UH	56	*/
	57	#define GENPD_FLAG_PM_CLK (1U << 0)
	58	#define GENPD_FLAG_IRQ_SAFE (1U << 1)
	59	#define GENPD_FLAG_ALWAYS_ON (1U << 2)
	60	#define GENPD_FLAG_ACTIVE_WAKEUP (1U << 3)
eb594b73	61	#define GENPD_FLAG_CPU_DOMAIN (1U << 4)
c11f6f5b	62
17b75eca RW	63	enum gpd_status {
17b75eca RW	64	GPD_STATE_ACTIVE = 0, /* PM domain is active */
17b75eca RW	65	GPD_STATE_POWER_OFF, /* PM domain is off */
17b75eca RW	66	};
596ba34b	67
f721889f RW	68	struct dev_power_governor {
f721889f RW	69	bool (power_down_ok)(struct dev_pm_domain domain);
9df3921e	70	bool (suspend_ok)(struct device dev);
f721889f RW	71	};
f721889f RW	72
d5e4cbfe RW	73	struct gpd_dev_ops {
	74	int (start)(struct device dev);
	75	int (stop)(struct device dev);
d5e4cbfe RW	76	};
d5e4cbfe RW	77
fc5cbf0c AH	78	struct genpd_power_state {
	79	s64 power_off_latency_ns;
	80	s64 power_on_latency_ns;
405f7226	81	s64 residency_ns;
0c9b694a	82	struct fwnode_handle *fwnode;
afece3ab	83	ktime_t idle_time;
49a27e27	84	void *data;
fc5cbf0c AH	85	};
fc5cbf0c AH	86
35241d12	87	struct genpd_lock_ops;
6e41766a	88	struct dev_pm_opp;
1067ae3e	89	struct opp_table;
35241d12	90
f721889f	91	struct generic_pm_domain {
401ea157	92	struct device dev;
f721889f	93	struct dev_pm_domain domain; /* PM domain operations */
5125bbf3	94	struct list_head gpd_list_node; /* Node in the global PM domains list */
5063ce15 RW	95	struct list_head master_links; /* Links with PM domain as a master */
5063ce15 RW	96	struct list_head slave_links; /* Links with PM domain as a slave */
f721889f	97	struct list_head dev_list; /* List of devices */
f721889f RW	98	struct dev_power_governor *gov;
f721889f RW	99	struct work_struct power_off_work;
de0aa06d JH	100	struct fwnode_handle provider; / Identity of the domain provider */
de0aa06d JH	101	bool has_provider;
d07e9c17	102	const char *name;
c4bb3160	103	atomic_t sd_count; /* Number of subdomains with power "on" */
17b75eca	104	enum gpd_status status; /* Current state of the domain */
596ba34b RW	105	unsigned int device_count; /* Number of devices */
	106	unsigned int suspended_count; /* System suspend device counter */
	107	unsigned int prepared_count; /* Suspend counter of prepared devices */
42f6284a	108	unsigned int performance_state; /* Aggregated max performance state */
eb594b73	109	cpumask_var_t cpus; /* A cpumask of the attached CPUs */
f721889f RW	110	int (power_off)(struct generic_pm_domain domain);
f721889f RW	111	int (power_on)(struct generic_pm_domain domain);
1067ae3e	112	struct opp_table opp_table; / OPP table of the genpd */
6e41766a VK	113	unsigned int (opp_to_performance_state)(struct generic_pm_domain genpd,
6e41766a VK	114	struct dev_pm_opp *opp);
42f6284a VK	115	int (set_performance_state)(struct generic_pm_domain genpd,
42f6284a VK	116	unsigned int state);
d5e4cbfe	117	struct gpd_dev_ops dev_ops;
221e9b58	118	s64 max_off_time_ns; /* Maximum allowed "suspended" time. */
6ff7bb0d RW	119	bool max_off_time_changed;
6ff7bb0d RW	120	bool cached_power_down_ok;
e9499968	121	bool cached_power_down_state_idx;
c16561e8 UH	122	int (attach_dev)(struct generic_pm_domain domain,
	123	struct device *dev);
	124	void (detach_dev)(struct generic_pm_domain domain,
	125	struct device *dev);
c11f6f5b	126	unsigned int flags; /* Bit field of configs for genpd */
59d65b73	127	struct genpd_power_state *states;
49a27e27 UH	128	void (free_states)(struct genpd_power_state states,
49a27e27 UH	129	unsigned int state_count);
fc5cbf0c AH	130	unsigned int state_count; /* number of states */
fc5cbf0c AH	131	unsigned int state_idx; /* state that genpd will go to when off */
afece3ab TG	132	ktime_t on_time;
afece3ab TG	133	ktime_t accounting_time;
35241d12	134	const struct genpd_lock_ops *lock_ops;
d716f479 LI	135	union {
	136	struct mutex mlock;
	137	struct {
	138	spinlock_t slock;
	139	unsigned long lock_flags;
	140	};
	141	};
fc5cbf0c	142
f721889f RW	143	};
f721889f RW	144
596ba34b RW	145	static inline struct generic_pm_domain pd_to_genpd(struct dev_pm_domain pd)
	146	{
	147	return container_of(pd, struct generic_pm_domain, domain);
	148	}
	149
5063ce15 RW	150	struct gpd_link {
	151	struct generic_pm_domain *master;
	152	struct list_head master_node;
	153	struct generic_pm_domain *slave;
	154	struct list_head slave_node;
18edf49c VK	155
	156	/* Sub-domain's per-master domain performance state */
	157	unsigned int performance_state;
	158	unsigned int prev_performance_state;
5063ce15 RW	159	};
5063ce15 RW	160
b02c999a	161	struct gpd_timing_data {
2b1d88cd UH	162	s64 suspend_latency_ns;
2b1d88cd UH	163	s64 resume_latency_ns;
a5bef810	164	s64 effective_constraint_ns;
6ff7bb0d	165	bool constraint_changed;
9df3921e	166	bool cached_suspend_ok;
b02c999a RW	167	};
b02c999a RW	168
00e7c295 UH	169	struct pm_domain_data {
	170	struct list_head list_node;
	171	struct device *dev;
	172	};
	173
cd0ea672 RW	174	struct generic_pm_domain_data {
cd0ea672 RW	175	struct pm_domain_data base;
b02c999a	176	struct gpd_timing_data td;
6ff7bb0d	177	struct notifier_block nb;
42f6284a	178	unsigned int performance_state;
a5ea7a0f	179	void *data;
cd0ea672 RW	180	};
cd0ea672 RW	181
9b4f617b	182	#ifdef CONFIG_PM_GENERIC_DOMAINS
cd0ea672 RW	183	static inline struct generic_pm_domain_data to_gpd_data(struct pm_domain_data pdd)
	184	{
	185	return container_of(pdd, struct generic_pm_domain_data, base);
	186	}
	187
d5e4cbfe RW	188	static inline struct generic_pm_domain_data dev_gpd_data(struct device dev)
	189	{
	190	return to_gpd_data(dev->power.subsys_data->domain_data);
	191	}
	192
1a7a6707	193	int pm_genpd_add_device(struct generic_pm_domain genpd, struct device dev);
924f4486	194	int pm_genpd_remove_device(struct device *dev);
781b9d6b UH	195	int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
	196	struct generic_pm_domain *new_subdomain);
	197	int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
	198	struct generic_pm_domain *target);
	199	int pm_genpd_init(struct generic_pm_domain *genpd,
	200	struct dev_power_governor *gov, bool is_off);
	201	int pm_genpd_remove(struct generic_pm_domain *genpd);
	202	int dev_pm_genpd_set_performance_state(struct device *dev, unsigned int state);
b02c999a	203
ae3c511c	204	extern struct dev_power_governor simple_qos_governor;
925b44a2	205	extern struct dev_power_governor pm_domain_always_on_gov;
e9499968 UH	206	#ifdef CONFIG_CPU_IDLE
	207	extern struct dev_power_governor pm_domain_cpu_gov;
	208	#endif
f721889f	209	#else
b02c999a	210
b642631d MD	211	static inline struct generic_pm_domain_data dev_gpd_data(struct device dev)
	212	{
	213	return ERR_PTR(-ENOSYS);
	214	}
1a7a6707 UH	215	static inline int pm_genpd_add_device(struct generic_pm_domain *genpd,
1a7a6707 UH	216	struct device *dev)
b02c999a RW	217	{
	218	return -ENOSYS;
	219	}
924f4486	220	static inline int pm_genpd_remove_device(struct device *dev)
f721889f RW	221	{
	222	return -ENOSYS;
	223	}
	224	static inline int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
	225	struct generic_pm_domain *new_sd)
	226	{
	227	return -ENOSYS;
	228	}
	229	static inline int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
	230	struct generic_pm_domain *target)
	231	{
	232	return -ENOSYS;
	233	}
7eb231c3 UH	234	static inline int pm_genpd_init(struct generic_pm_domain *genpd,
7eb231c3 UH	235	struct dev_power_governor *gov, bool is_off)
b02c999a	236	{
7eb231c3	237	return -ENOSYS;
b02c999a	238	}
3fe57710 JH	239	static inline int pm_genpd_remove(struct generic_pm_domain *genpd)
	240	{
	241	return -ENOTSUPP;
	242	}
16d0bf18	243
42f6284a VK	244	static inline int dev_pm_genpd_set_performance_state(struct device *dev,
	245	unsigned int state)
	246	{
	247	return -ENOTSUPP;
	248	}
	249
16d0bf18 GU	250	#define simple_qos_governor ((struct dev_power_governor )(NULL))
16d0bf18 GU	251	#define pm_domain_always_on_gov ((struct dev_power_governor )(NULL))
17f2ae7f RW	252	#endif
17f2ae7f RW	253
77f827de	254	#ifdef CONFIG_PM_GENERIC_DOMAINS_SLEEP
781b9d6b UH	255	void pm_genpd_syscore_poweroff(struct device *dev);
781b9d6b UH	256	void pm_genpd_syscore_poweron(struct device *dev);
77f827de	257	#else
d47e6464 UH	258	static inline void pm_genpd_syscore_poweroff(struct device *dev) {}
d47e6464 UH	259	static inline void pm_genpd_syscore_poweron(struct device *dev) {}
77f827de RW	260	#endif
77f827de RW	261
aa42240a TF	262	/* OF PM domain providers */
	263	struct of_device_id;
	264
40845524 TR	265	typedef struct generic_pm_domain (genpd_xlate_t)(struct of_phandle_args *args,
	266	void *data);
	267
aa42240a TF	268	struct genpd_onecell_data {
	269	struct generic_pm_domain **domains;
	270	unsigned int num_domains;
40845524	271	genpd_xlate_t xlate;
aa42240a TF	272	};
aa42240a TF	273
aa42240a	274	#ifdef CONFIG_PM_GENERIC_DOMAINS_OF
892ebdcc JH	275	int of_genpd_add_provider_simple(struct device_node *np,
	276	struct generic_pm_domain *genpd);
	277	int of_genpd_add_provider_onecell(struct device_node *np,
	278	struct genpd_onecell_data *data);
aa42240a	279	void of_genpd_del_provider(struct device_node *np);
781b9d6b UH	280	int of_genpd_add_device(struct of_phandle_args args, struct device dev);
	281	int of_genpd_add_subdomain(struct of_phandle_args *parent,
	282	struct of_phandle_args *new_subdomain);
	283	struct generic_pm_domain of_genpd_remove_last(struct device_node np);
	284	int of_genpd_parse_idle_states(struct device_node *dn,
	285	struct genpd_power_state *states, int n);
e38f89d3 VK	286	unsigned int pm_genpd_opp_to_performance_state(struct device *genpd_dev,
e38f89d3 VK	287	struct dev_pm_opp *opp);
aa42240a TF	288
aa42240a TF	289	int genpd_dev_pm_attach(struct device *dev);
3c095f32 UH	290	struct device genpd_dev_pm_attach_by_id(struct device dev,
3c095f32 UH	291	unsigned int index);
5d6be70a	292	struct device genpd_dev_pm_attach_by_name(struct device dev,
7416f1f2	293	const char *name);
aa42240a	294	#else /* !CONFIG_PM_GENERIC_DOMAINS_OF */
892ebdcc JH	295	static inline int of_genpd_add_provider_simple(struct device_node *np,
892ebdcc JH	296	struct generic_pm_domain *genpd)
aa42240a	297	{
892ebdcc JH	298	return -ENOTSUPP;
	299	}
	300
	301	static inline int of_genpd_add_provider_onecell(struct device_node *np,
	302	struct genpd_onecell_data *data)
	303	{
	304	return -ENOTSUPP;
aa42240a	305	}
aa42240a	306
892ebdcc	307	static inline void of_genpd_del_provider(struct device_node *np) {}
aa42240a	308
ec69572b JH	309	static inline int of_genpd_add_device(struct of_phandle_args *args,
	310	struct device *dev)
	311	{
	312	return -ENODEV;
	313	}
	314
	315	static inline int of_genpd_add_subdomain(struct of_phandle_args *parent,
	316	struct of_phandle_args *new_subdomain)
	317	{
	318	return -ENODEV;
	319	}
	320
30f60428 LI	321	static inline int of_genpd_parse_idle_states(struct device_node *dn,
	322	struct genpd_power_state *states, int n)
	323	{
	324	return -ENODEV;
	325	}
	326
e38f89d3 VK	327	static inline unsigned int
	328	pm_genpd_opp_to_performance_state(struct device *genpd_dev,
	329	struct dev_pm_opp *opp)
	330	{
	331	return 0;
	332	}
	333
aa42240a TF	334	static inline int genpd_dev_pm_attach(struct device *dev)
aa42240a TF	335	{
919b7308	336	return 0;
aa42240a	337	}
17926551	338
3c095f32 UH	339	static inline struct device genpd_dev_pm_attach_by_id(struct device dev,
	340	unsigned int index)
	341	{
	342	return NULL;
	343	}
	344
5d6be70a	345	static inline struct device genpd_dev_pm_attach_by_name(struct device dev,
7416f1f2	346	const char *name)
5d6be70a UH	347	{
	348	return NULL;
	349	}
	350
17926551 JH	351	static inline
	352	struct generic_pm_domain of_genpd_remove_last(struct device_node np)
	353	{
	354	return ERR_PTR(-ENOTSUPP);
	355	}
aa42240a TF	356	#endif /* CONFIG_PM_GENERIC_DOMAINS_OF */
aa42240a TF	357
f48c767c	358	#ifdef CONFIG_PM
781b9d6b	359	int dev_pm_domain_attach(struct device *dev, bool power_on);
82e12d9e UH	360	struct device dev_pm_domain_attach_by_id(struct device dev,
82e12d9e UH	361	unsigned int index);
27dceb81	362	struct device dev_pm_domain_attach_by_name(struct device dev,
eeb35df0	363	const char *name);
781b9d6b UH	364	void dev_pm_domain_detach(struct device *dev, bool power_off);
781b9d6b UH	365	void dev_pm_domain_set(struct device dev, struct dev_pm_domain pd);
f48c767c UH	366	#else
	367	static inline int dev_pm_domain_attach(struct device *dev, bool power_on)
	368	{
919b7308	369	return 0;
f48c767c	370	}
82e12d9e UH	371	static inline struct device dev_pm_domain_attach_by_id(struct device dev,
	372	unsigned int index)
	373	{
	374	return NULL;
	375	}
27dceb81	376	static inline struct device dev_pm_domain_attach_by_name(struct device dev,
eeb35df0	377	const char *name)
27dceb81 UH	378	{
	379	return NULL;
	380	}
f48c767c	381	static inline void dev_pm_domain_detach(struct device *dev, bool power_off) {}
989561de TV	382	static inline void dev_pm_domain_set(struct device *dev,
989561de TV	383	struct dev_pm_domain *pd) {}
f48c767c UH	384	#endif
f48c767c UH	385
f721889f	386	#endif /* _LINUX_PM_DOMAIN_H */