[mirror_ubuntu-focal-kernel.git] / include / linux / pm_domain.h

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * pm_domain.h - Definitions and headers related to device power domains.
 *
 * Copyright (C) 2011 Rafael J. Wysocki <rjw@sisk.pl>, Renesas Electronics Corp.
 */

#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.
 *
 * GENPD_FLAG_RPM_ALWAYS_ON:	Instructs genpd to always keep the PM domain
 *				powered on except for system suspend.
 */
#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)
#define GENPD_FLAG_RPM_ALWAYS_ON (1U << 5)

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;
	int cpu;
	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 *subdomain);
int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
			      struct generic_pm_domain *subdomain);
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 *subdomain)
{
	return -ENOSYS;
}
static inline int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
					    struct generic_pm_domain *subdomain)
{
	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_spec,
			   struct of_phandle_args *subdomain_spec);
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_spec,
					 struct of_phandle_args *subdomain_spec)
{
	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
55716d26	1	/* SPDX-License-Identifier: GPL-2.0-only */
f721889f RW	2	/*
	3	* pm_domain.h - Definitions and headers related to device power domains.
	4	*
	5	* Copyright (C) 2011 Rafael J. Wysocki <rjw@sisk.pl>, Renesas Electronics Corp.
f721889f RW	6	*/
	7
	8	#ifndef _LINUX_PM_DOMAIN_H
	9	#define _LINUX_PM_DOMAIN_H
	10
	11	#include <linux/device.h>
313162d0 PG	12	#include <linux/mutex.h>
313162d0 PG	13	#include <linux/pm.h>
4f042cda	14	#include <linux/err.h>
c8aa130b	15	#include <linux/of.h>
6ff7bb0d	16	#include <linux/notifier.h>
d716f479	17	#include <linux/spinlock.h>
eb594b73	18	#include <linux/cpumask.h>
f721889f	19
e5089c2c UH	20	/*
	21	* Flags to control the behaviour of a genpd.
	22	*
	23	* These flags may be set in the struct generic_pm_domain's flags field by a
	24	* genpd backend driver. The flags must be set before it calls pm_genpd_init(),
	25	* which initializes a genpd.
	26	*
	27	* GENPD_FLAG_PM_CLK: Instructs genpd to use the PM clk framework,
	28	* while powering on/off attached devices.
	29	*
	30	* GENPD_FLAG_IRQ_SAFE: This informs genpd that its backend callbacks,
	31	* ->power_on\|off(), doesn't sleep. Hence, these
	32	* can be invoked from within atomic context, which
	33	* enables genpd to power on/off the PM domain,
	34	* even when pm_runtime_is_irq_safe() returns true,
	35	* for any of its attached devices. Note that, a
	36	* genpd having this flag set, requires its
	37	* masterdomains to also have it set.
	38	*
	39	* GENPD_FLAG_ALWAYS_ON: Instructs genpd to always keep the PM domain
	40	* powered on.
	41	*
	42	* GENPD_FLAG_ACTIVE_WAKEUP: Instructs genpd to keep the PM domain powered
	43	* on, in case any of its attached devices is used
	44	* in the wakeup path to serve system wakeups.
eb594b73 UH	45	*
	46	* GENPD_FLAG_CPU_DOMAIN: Instructs genpd that it should expect to get
	47	* devices attached, which may belong to CPUs or
	48	* possibly have subdomains with CPUs attached.
	49	* This flag enables the genpd backend driver to
	50	* deploy idle power management support for CPUs
	51	* and groups of CPUs. Note that, the backend
	52	* driver must then comply with the so called,
	53	* last-man-standing algorithm, for the CPUs in the
	54	* PM domain.
ed61e18a LC	55	*
	56	* GENPD_FLAG_RPM_ALWAYS_ON: Instructs genpd to always keep the PM domain
	57	* powered on except for system suspend.
e5089c2c UH	58	*/
	59	#define GENPD_FLAG_PM_CLK (1U << 0)
	60	#define GENPD_FLAG_IRQ_SAFE (1U << 1)
	61	#define GENPD_FLAG_ALWAYS_ON (1U << 2)
	62	#define GENPD_FLAG_ACTIVE_WAKEUP (1U << 3)
eb594b73	63	#define GENPD_FLAG_CPU_DOMAIN (1U << 4)
ed61e18a	64	#define GENPD_FLAG_RPM_ALWAYS_ON (1U << 5)
c11f6f5b	65
17b75eca RW	66	enum gpd_status {
17b75eca RW	67	GPD_STATE_ACTIVE = 0, /* PM domain is active */
17b75eca RW	68	GPD_STATE_POWER_OFF, /* PM domain is off */
17b75eca RW	69	};
596ba34b	70
f721889f RW	71	struct dev_power_governor {
f721889f RW	72	bool (power_down_ok)(struct dev_pm_domain domain);
9df3921e	73	bool (suspend_ok)(struct device dev);
f721889f RW	74	};
f721889f RW	75
d5e4cbfe RW	76	struct gpd_dev_ops {
	77	int (start)(struct device dev);
	78	int (stop)(struct device dev);
d5e4cbfe RW	79	};
d5e4cbfe RW	80
fc5cbf0c AH	81	struct genpd_power_state {
	82	s64 power_off_latency_ns;
	83	s64 power_on_latency_ns;
405f7226	84	s64 residency_ns;
0c9b694a	85	struct fwnode_handle *fwnode;
afece3ab	86	ktime_t idle_time;
49a27e27	87	void *data;
fc5cbf0c AH	88	};
fc5cbf0c AH	89
35241d12	90	struct genpd_lock_ops;
6e41766a	91	struct dev_pm_opp;
1067ae3e	92	struct opp_table;
35241d12	93
f721889f	94	struct generic_pm_domain {
401ea157	95	struct device dev;
f721889f	96	struct dev_pm_domain domain; /* PM domain operations */
5125bbf3	97	struct list_head gpd_list_node; /* Node in the global PM domains list */
5063ce15 RW	98	struct list_head master_links; /* Links with PM domain as a master */
5063ce15 RW	99	struct list_head slave_links; /* Links with PM domain as a slave */
f721889f	100	struct list_head dev_list; /* List of devices */
f721889f RW	101	struct dev_power_governor *gov;
f721889f RW	102	struct work_struct power_off_work;
de0aa06d JH	103	struct fwnode_handle provider; / Identity of the domain provider */
de0aa06d JH	104	bool has_provider;
d07e9c17	105	const char *name;
c4bb3160	106	atomic_t sd_count; /* Number of subdomains with power "on" */
17b75eca	107	enum gpd_status status; /* Current state of the domain */
596ba34b RW	108	unsigned int device_count; /* Number of devices */
	109	unsigned int suspended_count; /* System suspend device counter */
	110	unsigned int prepared_count; /* Suspend counter of prepared devices */
42f6284a	111	unsigned int performance_state; /* Aggregated max performance state */
eb594b73	112	cpumask_var_t cpus; /* A cpumask of the attached CPUs */
f721889f RW	113	int (power_off)(struct generic_pm_domain domain);
f721889f RW	114	int (power_on)(struct generic_pm_domain domain);
1067ae3e	115	struct opp_table opp_table; / OPP table of the genpd */
6e41766a VK	116	unsigned int (opp_to_performance_state)(struct generic_pm_domain genpd,
6e41766a VK	117	struct dev_pm_opp *opp);
42f6284a VK	118	int (set_performance_state)(struct generic_pm_domain genpd,
42f6284a VK	119	unsigned int state);
d5e4cbfe	120	struct gpd_dev_ops dev_ops;
221e9b58	121	s64 max_off_time_ns; /* Maximum allowed "suspended" time. */
6ff7bb0d RW	122	bool max_off_time_changed;
6ff7bb0d RW	123	bool cached_power_down_ok;
e9499968	124	bool cached_power_down_state_idx;
c16561e8 UH	125	int (attach_dev)(struct generic_pm_domain domain,
	126	struct device *dev);
	127	void (detach_dev)(struct generic_pm_domain domain,
	128	struct device *dev);
c11f6f5b	129	unsigned int flags; /* Bit field of configs for genpd */
59d65b73	130	struct genpd_power_state *states;
49a27e27 UH	131	void (free_states)(struct genpd_power_state states,
49a27e27 UH	132	unsigned int state_count);
fc5cbf0c AH	133	unsigned int state_count; /* number of states */
fc5cbf0c AH	134	unsigned int state_idx; /* state that genpd will go to when off */
afece3ab TG	135	ktime_t on_time;
afece3ab TG	136	ktime_t accounting_time;
35241d12	137	const struct genpd_lock_ops *lock_ops;
d716f479 LI	138	union {
	139	struct mutex mlock;
	140	struct {
	141	spinlock_t slock;
	142	unsigned long lock_flags;
	143	};
	144	};
fc5cbf0c	145
f721889f RW	146	};
f721889f RW	147
596ba34b RW	148	static inline struct generic_pm_domain pd_to_genpd(struct dev_pm_domain pd)
	149	{
	150	return container_of(pd, struct generic_pm_domain, domain);
	151	}
	152
5063ce15 RW	153	struct gpd_link {
	154	struct generic_pm_domain *master;
	155	struct list_head master_node;
	156	struct generic_pm_domain *slave;
	157	struct list_head slave_node;
18edf49c VK	158
	159	/* Sub-domain's per-master domain performance state */
	160	unsigned int performance_state;
	161	unsigned int prev_performance_state;
5063ce15 RW	162	};
5063ce15 RW	163
b02c999a	164	struct gpd_timing_data {
2b1d88cd UH	165	s64 suspend_latency_ns;
2b1d88cd UH	166	s64 resume_latency_ns;
a5bef810	167	s64 effective_constraint_ns;
6ff7bb0d	168	bool constraint_changed;
9df3921e	169	bool cached_suspend_ok;
b02c999a RW	170	};
b02c999a RW	171
00e7c295 UH	172	struct pm_domain_data {
	173	struct list_head list_node;
	174	struct device *dev;
	175	};
	176
cd0ea672 RW	177	struct generic_pm_domain_data {
cd0ea672 RW	178	struct pm_domain_data base;
b02c999a	179	struct gpd_timing_data td;
6ff7bb0d	180	struct notifier_block nb;
f9ccd7c3	181	int cpu;
42f6284a	182	unsigned int performance_state;
a5ea7a0f	183	void *data;
cd0ea672 RW	184	};
cd0ea672 RW	185
9b4f617b	186	#ifdef CONFIG_PM_GENERIC_DOMAINS
cd0ea672 RW	187	static inline struct generic_pm_domain_data to_gpd_data(struct pm_domain_data pdd)
	188	{
	189	return container_of(pdd, struct generic_pm_domain_data, base);
	190	}
	191
d5e4cbfe RW	192	static inline struct generic_pm_domain_data dev_gpd_data(struct device dev)
	193	{
	194	return to_gpd_data(dev->power.subsys_data->domain_data);
	195	}
	196
1a7a6707	197	int pm_genpd_add_device(struct generic_pm_domain genpd, struct device dev);
924f4486	198	int pm_genpd_remove_device(struct device *dev);
781b9d6b	199	int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
0d1e16c6	200	struct generic_pm_domain *subdomain);
781b9d6b	201	int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
0d1e16c6	202	struct generic_pm_domain *subdomain);
781b9d6b UH	203	int pm_genpd_init(struct generic_pm_domain *genpd,
	204	struct dev_power_governor *gov, bool is_off);
	205	int pm_genpd_remove(struct generic_pm_domain *genpd);
	206	int dev_pm_genpd_set_performance_state(struct device *dev, unsigned int state);
b02c999a	207
ae3c511c	208	extern struct dev_power_governor simple_qos_governor;
925b44a2	209	extern struct dev_power_governor pm_domain_always_on_gov;
e9499968 UH	210	#ifdef CONFIG_CPU_IDLE
	211	extern struct dev_power_governor pm_domain_cpu_gov;
	212	#endif
f721889f	213	#else
b02c999a	214
b642631d MD	215	static inline struct generic_pm_domain_data dev_gpd_data(struct device dev)
	216	{
	217	return ERR_PTR(-ENOSYS);
	218	}
1a7a6707 UH	219	static inline int pm_genpd_add_device(struct generic_pm_domain *genpd,
1a7a6707 UH	220	struct device *dev)
b02c999a RW	221	{
	222	return -ENOSYS;
	223	}
924f4486	224	static inline int pm_genpd_remove_device(struct device *dev)
f721889f RW	225	{
	226	return -ENOSYS;
	227	}
	228	static inline int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
0d1e16c6	229	struct generic_pm_domain *subdomain)
f721889f RW	230	{
	231	return -ENOSYS;
	232	}
	233	static inline int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
0d1e16c6	234	struct generic_pm_domain *subdomain)
f721889f RW	235	{
	236	return -ENOSYS;
	237	}
7eb231c3 UH	238	static inline int pm_genpd_init(struct generic_pm_domain *genpd,
7eb231c3 UH	239	struct dev_power_governor *gov, bool is_off)
b02c999a	240	{
7eb231c3	241	return -ENOSYS;
b02c999a	242	}
3fe57710 JH	243	static inline int pm_genpd_remove(struct generic_pm_domain *genpd)
	244	{
	245	return -ENOTSUPP;
	246	}
16d0bf18	247
42f6284a VK	248	static inline int dev_pm_genpd_set_performance_state(struct device *dev,
	249	unsigned int state)
	250	{
	251	return -ENOTSUPP;
	252	}
	253
16d0bf18 GU	254	#define simple_qos_governor ((struct dev_power_governor )(NULL))
16d0bf18 GU	255	#define pm_domain_always_on_gov ((struct dev_power_governor )(NULL))
17f2ae7f RW	256	#endif
17f2ae7f RW	257
77f827de	258	#ifdef CONFIG_PM_GENERIC_DOMAINS_SLEEP
781b9d6b UH	259	void pm_genpd_syscore_poweroff(struct device *dev);
781b9d6b UH	260	void pm_genpd_syscore_poweron(struct device *dev);
77f827de	261	#else
d47e6464 UH	262	static inline void pm_genpd_syscore_poweroff(struct device *dev) {}
d47e6464 UH	263	static inline void pm_genpd_syscore_poweron(struct device *dev) {}
77f827de RW	264	#endif
77f827de RW	265
aa42240a TF	266	/* OF PM domain providers */
	267	struct of_device_id;
	268
40845524 TR	269	typedef struct generic_pm_domain (genpd_xlate_t)(struct of_phandle_args *args,
	270	void *data);
	271
aa42240a TF	272	struct genpd_onecell_data {
	273	struct generic_pm_domain **domains;
	274	unsigned int num_domains;
40845524	275	genpd_xlate_t xlate;
aa42240a TF	276	};
aa42240a TF	277
aa42240a	278	#ifdef CONFIG_PM_GENERIC_DOMAINS_OF
892ebdcc JH	279	int of_genpd_add_provider_simple(struct device_node *np,
	280	struct generic_pm_domain *genpd);
	281	int of_genpd_add_provider_onecell(struct device_node *np,
	282	struct genpd_onecell_data *data);
aa42240a	283	void of_genpd_del_provider(struct device_node *np);
781b9d6b	284	int of_genpd_add_device(struct of_phandle_args args, struct device dev);
0d1e16c6 UH	285	int of_genpd_add_subdomain(struct of_phandle_args *parent_spec,
0d1e16c6 UH	286	struct of_phandle_args *subdomain_spec);
781b9d6b UH	287	struct generic_pm_domain of_genpd_remove_last(struct device_node np);
	288	int of_genpd_parse_idle_states(struct device_node *dn,
	289	struct genpd_power_state *states, int n);
e38f89d3 VK	290	unsigned int pm_genpd_opp_to_performance_state(struct device *genpd_dev,
e38f89d3 VK	291	struct dev_pm_opp *opp);
aa42240a TF	292
aa42240a TF	293	int genpd_dev_pm_attach(struct device *dev);
3c095f32 UH	294	struct device genpd_dev_pm_attach_by_id(struct device dev,
3c095f32 UH	295	unsigned int index);
5d6be70a	296	struct device genpd_dev_pm_attach_by_name(struct device dev,
7416f1f2	297	const char *name);
aa42240a	298	#else /* !CONFIG_PM_GENERIC_DOMAINS_OF */
892ebdcc JH	299	static inline int of_genpd_add_provider_simple(struct device_node *np,
892ebdcc JH	300	struct generic_pm_domain *genpd)
aa42240a	301	{
892ebdcc JH	302	return -ENOTSUPP;
	303	}
	304
	305	static inline int of_genpd_add_provider_onecell(struct device_node *np,
	306	struct genpd_onecell_data *data)
	307	{
	308	return -ENOTSUPP;
aa42240a	309	}
aa42240a	310
892ebdcc	311	static inline void of_genpd_del_provider(struct device_node *np) {}
aa42240a	312
ec69572b JH	313	static inline int of_genpd_add_device(struct of_phandle_args *args,
	314	struct device *dev)
	315	{
	316	return -ENODEV;
	317	}
	318
0d1e16c6 UH	319	static inline int of_genpd_add_subdomain(struct of_phandle_args *parent_spec,
0d1e16c6 UH	320	struct of_phandle_args *subdomain_spec)
ec69572b JH	321	{
	322	return -ENODEV;
	323	}
	324
30f60428 LI	325	static inline int of_genpd_parse_idle_states(struct device_node *dn,
	326	struct genpd_power_state *states, int n)
	327	{
	328	return -ENODEV;
	329	}
	330
e38f89d3 VK	331	static inline unsigned int
	332	pm_genpd_opp_to_performance_state(struct device *genpd_dev,
	333	struct dev_pm_opp *opp)
	334	{
	335	return 0;
	336	}
	337
aa42240a TF	338	static inline int genpd_dev_pm_attach(struct device *dev)
aa42240a TF	339	{
919b7308	340	return 0;
aa42240a	341	}
17926551	342
3c095f32 UH	343	static inline struct device genpd_dev_pm_attach_by_id(struct device dev,
	344	unsigned int index)
	345	{
	346	return NULL;
	347	}
	348
5d6be70a	349	static inline struct device genpd_dev_pm_attach_by_name(struct device dev,
7416f1f2	350	const char *name)
5d6be70a UH	351	{
	352	return NULL;
	353	}
	354
17926551 JH	355	static inline
	356	struct generic_pm_domain of_genpd_remove_last(struct device_node np)
	357	{
	358	return ERR_PTR(-ENOTSUPP);
	359	}
aa42240a TF	360	#endif /* CONFIG_PM_GENERIC_DOMAINS_OF */
aa42240a TF	361
f48c767c	362	#ifdef CONFIG_PM
781b9d6b	363	int dev_pm_domain_attach(struct device *dev, bool power_on);
82e12d9e UH	364	struct device dev_pm_domain_attach_by_id(struct device dev,
82e12d9e UH	365	unsigned int index);
27dceb81	366	struct device dev_pm_domain_attach_by_name(struct device dev,
eeb35df0	367	const char *name);
781b9d6b UH	368	void dev_pm_domain_detach(struct device *dev, bool power_off);
781b9d6b UH	369	void dev_pm_domain_set(struct device dev, struct dev_pm_domain pd);
f48c767c UH	370	#else
	371	static inline int dev_pm_domain_attach(struct device *dev, bool power_on)
	372	{
919b7308	373	return 0;
f48c767c	374	}
82e12d9e UH	375	static inline struct device dev_pm_domain_attach_by_id(struct device dev,
	376	unsigned int index)
	377	{
	378	return NULL;
	379	}
27dceb81	380	static inline struct device dev_pm_domain_attach_by_name(struct device dev,
eeb35df0	381	const char *name)
27dceb81 UH	382	{
	383	return NULL;
	384	}
f48c767c	385	static inline void dev_pm_domain_detach(struct device *dev, bool power_off) {}
989561de TV	386	static inline void dev_pm_domain_set(struct device *dev,
989561de TV	387	struct dev_pm_domain *pd) {}
f48c767c UH	388	#endif
f48c767c UH	389
f721889f	390	#endif /* _LINUX_PM_DOMAIN_H */