2 * pm_domain.h - Definitions and headers related to device power domains.
4 * Copyright (C) 2011 Rafael J. Wysocki <rjw@sisk.pl>, Renesas Electronics Corp.
6 * This file is released under the GPLv2.
9 #ifndef _LINUX_PM_DOMAIN_H
10 #define _LINUX_PM_DOMAIN_H
12 #include <linux/device.h>
13 #include <linux/mutex.h>
15 #include <linux/err.h>
17 #include <linux/notifier.h>
18 #include <linux/cpuidle.h>
21 GPD_STATE_ACTIVE
= 0, /* PM domain is active */
22 GPD_STATE_WAIT_MASTER
, /* PM domain's master is being waited for */
23 GPD_STATE_BUSY
, /* Something is happening to the PM domain */
24 GPD_STATE_REPEAT
, /* Power off in progress, to be repeated */
25 GPD_STATE_POWER_OFF
, /* PM domain is off */
28 struct dev_power_governor
{
29 bool (*power_down_ok
)(struct dev_pm_domain
*domain
);
30 bool (*stop_ok
)(struct device
*dev
);
34 int (*start
)(struct device
*dev
);
35 int (*stop
)(struct device
*dev
);
36 int (*save_state
)(struct device
*dev
);
37 int (*restore_state
)(struct device
*dev
);
38 bool (*active_wakeup
)(struct device
*dev
);
41 struct gpd_cpuidle_data
{
42 unsigned int saved_exit_latency
;
43 struct cpuidle_state
*idle_state
;
46 struct generic_pm_domain
{
47 struct dev_pm_domain domain
; /* PM domain operations */
48 struct list_head gpd_list_node
; /* Node in the global PM domains list */
49 struct list_head master_links
; /* Links with PM domain as a master */
50 struct list_head slave_links
; /* Links with PM domain as a slave */
51 struct list_head dev_list
; /* List of devices */
53 struct dev_power_governor
*gov
;
54 struct work_struct power_off_work
;
56 unsigned int in_progress
; /* Number of devices being suspended now */
57 atomic_t sd_count
; /* Number of subdomains with power "on" */
58 enum gpd_status status
; /* Current state of the domain */
59 wait_queue_head_t status_wait_queue
;
60 struct task_struct
*poweroff_task
; /* Powering off task */
61 unsigned int resume_count
; /* Number of devices being resumed */
62 unsigned int device_count
; /* Number of devices */
63 unsigned int suspended_count
; /* System suspend device counter */
64 unsigned int prepared_count
; /* Suspend counter of prepared devices */
65 bool suspend_power_off
; /* Power status before system suspend */
66 int (*power_off
)(struct generic_pm_domain
*domain
);
67 s64 power_off_latency_ns
;
68 int (*power_on
)(struct generic_pm_domain
*domain
);
69 s64 power_on_latency_ns
;
70 struct gpd_dev_ops dev_ops
;
71 s64 max_off_time_ns
; /* Maximum allowed "suspended" time. */
72 bool max_off_time_changed
;
73 bool cached_power_down_ok
;
74 struct gpd_cpuidle_data
*cpuidle_data
;
75 int (*attach_dev
)(struct generic_pm_domain
*domain
,
77 void (*detach_dev
)(struct generic_pm_domain
*domain
,
81 static inline struct generic_pm_domain
*pd_to_genpd(struct dev_pm_domain
*pd
)
83 return container_of(pd
, struct generic_pm_domain
, domain
);
87 struct generic_pm_domain
*master
;
88 struct list_head master_node
;
89 struct generic_pm_domain
*slave
;
90 struct list_head slave_node
;
93 struct gpd_timing_data
{
96 s64 save_state_latency_ns
;
97 s64 restore_state_latency_ns
;
98 s64 effective_constraint_ns
;
99 bool constraint_changed
;
103 struct generic_pm_domain_data
{
104 struct pm_domain_data base
;
105 struct gpd_timing_data td
;
106 struct notifier_block nb
;
108 unsigned int refcount
;
112 #ifdef CONFIG_PM_GENERIC_DOMAINS
113 static inline struct generic_pm_domain_data
*to_gpd_data(struct pm_domain_data
*pdd
)
115 return container_of(pdd
, struct generic_pm_domain_data
, base
);
118 static inline struct generic_pm_domain_data
*dev_gpd_data(struct device
*dev
)
120 return to_gpd_data(dev
->power
.subsys_data
->domain_data
);
123 extern struct generic_pm_domain
*dev_to_genpd(struct device
*dev
);
124 extern int __pm_genpd_add_device(struct generic_pm_domain
*genpd
,
126 struct gpd_timing_data
*td
);
128 extern int __pm_genpd_name_add_device(const char *domain_name
,
130 struct gpd_timing_data
*td
);
132 extern int pm_genpd_remove_device(struct generic_pm_domain
*genpd
,
134 extern void pm_genpd_dev_need_restore(struct device
*dev
, bool val
);
135 extern int pm_genpd_add_subdomain(struct generic_pm_domain
*genpd
,
136 struct generic_pm_domain
*new_subdomain
);
137 extern int pm_genpd_add_subdomain_names(const char *master_name
,
138 const char *subdomain_name
);
139 extern int pm_genpd_remove_subdomain(struct generic_pm_domain
*genpd
,
140 struct generic_pm_domain
*target
);
141 extern int pm_genpd_attach_cpuidle(struct generic_pm_domain
*genpd
, int state
);
142 extern int pm_genpd_name_attach_cpuidle(const char *name
, int state
);
143 extern int pm_genpd_detach_cpuidle(struct generic_pm_domain
*genpd
);
144 extern int pm_genpd_name_detach_cpuidle(const char *name
);
145 extern void pm_genpd_init(struct generic_pm_domain
*genpd
,
146 struct dev_power_governor
*gov
, bool is_off
);
148 extern int pm_genpd_poweron(struct generic_pm_domain
*genpd
);
149 extern int pm_genpd_name_poweron(const char *domain_name
);
151 extern struct dev_power_governor simple_qos_governor
;
152 extern struct dev_power_governor pm_domain_always_on_gov
;
155 static inline struct generic_pm_domain_data
*dev_gpd_data(struct device
*dev
)
157 return ERR_PTR(-ENOSYS
);
159 static inline struct generic_pm_domain
*dev_to_genpd(struct device
*dev
)
161 return ERR_PTR(-ENOSYS
);
163 static inline int __pm_genpd_add_device(struct generic_pm_domain
*genpd
,
165 struct gpd_timing_data
*td
)
169 static inline int __pm_genpd_name_add_device(const char *domain_name
,
171 struct gpd_timing_data
*td
)
175 static inline int pm_genpd_remove_device(struct generic_pm_domain
*genpd
,
180 static inline void pm_genpd_dev_need_restore(struct device
*dev
, bool val
) {}
181 static inline int pm_genpd_add_subdomain(struct generic_pm_domain
*genpd
,
182 struct generic_pm_domain
*new_sd
)
186 static inline int pm_genpd_add_subdomain_names(const char *master_name
,
187 const char *subdomain_name
)
191 static inline int pm_genpd_remove_subdomain(struct generic_pm_domain
*genpd
,
192 struct generic_pm_domain
*target
)
196 static inline int pm_genpd_attach_cpuidle(struct generic_pm_domain
*genpd
, int st
)
200 static inline int pm_genpd_name_attach_cpuidle(const char *name
, int state
)
204 static inline int pm_genpd_detach_cpuidle(struct generic_pm_domain
*genpd
)
208 static inline int pm_genpd_name_detach_cpuidle(const char *name
)
212 static inline void pm_genpd_init(struct generic_pm_domain
*genpd
,
213 struct dev_power_governor
*gov
, bool is_off
)
216 static inline int pm_genpd_poweron(struct generic_pm_domain
*genpd
)
220 static inline int pm_genpd_name_poweron(const char *domain_name
)
224 #define simple_qos_governor NULL
225 #define pm_domain_always_on_gov NULL
228 static inline int pm_genpd_add_device(struct generic_pm_domain
*genpd
,
231 return __pm_genpd_add_device(genpd
, dev
, NULL
);
234 static inline int pm_genpd_name_add_device(const char *domain_name
,
237 return __pm_genpd_name_add_device(domain_name
, dev
, NULL
);
240 #ifdef CONFIG_PM_GENERIC_DOMAINS_RUNTIME
241 extern void pm_genpd_poweroff_unused(void);
243 static inline void pm_genpd_poweroff_unused(void) {}
246 #ifdef CONFIG_PM_GENERIC_DOMAINS_SLEEP
247 extern void pm_genpd_syscore_poweroff(struct device
*dev
);
248 extern void pm_genpd_syscore_poweron(struct device
*dev
);
250 static inline void pm_genpd_syscore_poweroff(struct device
*dev
) {}
251 static inline void pm_genpd_syscore_poweron(struct device
*dev
) {}
254 /* OF PM domain providers */
257 struct genpd_onecell_data
{
258 struct generic_pm_domain
**domains
;
259 unsigned int num_domains
;
262 typedef struct generic_pm_domain
*(*genpd_xlate_t
)(struct of_phandle_args
*args
,
265 #ifdef CONFIG_PM_GENERIC_DOMAINS_OF
266 int __of_genpd_add_provider(struct device_node
*np
, genpd_xlate_t xlate
,
268 void of_genpd_del_provider(struct device_node
*np
);
270 struct generic_pm_domain
*__of_genpd_xlate_simple(
271 struct of_phandle_args
*genpdspec
,
273 struct generic_pm_domain
*__of_genpd_xlate_onecell(
274 struct of_phandle_args
*genpdspec
,
277 int genpd_dev_pm_attach(struct device
*dev
);
278 #else /* !CONFIG_PM_GENERIC_DOMAINS_OF */
279 static inline int __of_genpd_add_provider(struct device_node
*np
,
280 genpd_xlate_t xlate
, void *data
)
284 static inline void of_genpd_del_provider(struct device_node
*np
) {}
286 #define __of_genpd_xlate_simple NULL
287 #define __of_genpd_xlate_onecell NULL
289 static inline int genpd_dev_pm_attach(struct device
*dev
)
293 #endif /* CONFIG_PM_GENERIC_DOMAINS_OF */
295 static inline int of_genpd_add_provider_simple(struct device_node
*np
,
296 struct generic_pm_domain
*genpd
)
298 return __of_genpd_add_provider(np
, __of_genpd_xlate_simple
, genpd
);
300 static inline int of_genpd_add_provider_onecell(struct device_node
*np
,
301 struct genpd_onecell_data
*data
)
303 return __of_genpd_add_provider(np
, __of_genpd_xlate_onecell
, data
);
307 extern int dev_pm_domain_attach(struct device
*dev
, bool power_on
);
308 extern void dev_pm_domain_detach(struct device
*dev
, bool power_off
);
310 static inline int dev_pm_domain_attach(struct device
*dev
, bool power_on
)
314 static inline void dev_pm_domain_detach(struct device
*dev
, bool power_off
) {}
317 #endif /* _LINUX_PM_DOMAIN_H */