include/linux/pm_wakeup.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  *  pm_wakeup.h - Power management wakeup interface
   4  *
   5  *  Copyright (C) 2008 Alan Stern
   6  *  Copyright (C) 2010 Rafael J. Wysocki, Novell Inc.
   7  */
   8
   9 #ifndef _LINUX_PM_WAKEUP_H
  10 #define _LINUX_PM_WAKEUP_H
  11
  12 #ifndef _DEVICE_H_
  13 # error "please don't include this file directly"
  14 #endif
  15
  16 #include <linux/types.h>
  17
  18 struct wake_irq;
  19
  20 /**
  21  * struct wakeup_source - Representation of wakeup sources
  22  *
  23  * @name: Name of the wakeup source
  24  * @entry: Wakeup source list entry
  25  * @lock: Wakeup source lock
  26  * @wakeirq: Optional device specific wakeirq
  27  * @timer: Wakeup timer list
  28  * @timer_expires: Wakeup timer expiration
  29  * @total_time: Total time this wakeup source has been active.
  30  * @max_time: Maximum time this wakeup source has been continuously active.
  31  * @last_time: Monotonic clock when the wakeup source's was touched last time.
  32  * @prevent_sleep_time: Total time this source has been preventing autosleep.
  33  * @event_count: Number of signaled wakeup events.
  34  * @active_count: Number of times the wakeup source was activated.
  35  * @relax_count: Number of times the wakeup source was deactivated.
  36  * @expire_count: Number of times the wakeup source's timeout has expired.
  37  * @wakeup_count: Number of times the wakeup source might abort suspend.
  38  * @active: Status of the wakeup source.
  39  * @autosleep_enabled: Autosleep is active, so update @prevent_sleep_time.
  40  */
  41 struct wakeup_source {
  42         const char              *name;
  43         struct list_head        entry;
  44         spinlock_t              lock;
  45         struct wake_irq         *wakeirq;
  46         struct timer_list       timer;
  47         unsigned long           timer_expires;
  48         ktime_t total_time;
  49         ktime_t max_time;
  50         ktime_t last_time;
  51         ktime_t start_prevent_time;
  52         ktime_t prevent_sleep_time;
  53         unsigned long           event_count;
  54         unsigned long           active_count;
  55         unsigned long           relax_count;
  56         unsigned long           expire_count;
  57         unsigned long           wakeup_count;
  58         bool                    active:1;
  59         bool                    autosleep_enabled:1;
  60 };
  61
  62 #ifdef CONFIG_PM_SLEEP
  63
  64 /*
  65  * Changes to device_may_wakeup take effect on the next pm state change.
  66  */
  67
  68 static inline bool device_can_wakeup(struct device *dev)
  69 {
  70         return dev->power.can_wakeup;
  71 }
  72
  73 static inline bool device_may_wakeup(struct device *dev)
  74 {
  75         return dev->power.can_wakeup && !!dev->power.wakeup;
  76 }
  77
  78 static inline void device_set_wakeup_path(struct device *dev)
  79 {
  80         dev->power.wakeup_path = true;
  81 }
  82
  83 /* drivers/base/power/wakeup.c */
  84 extern void wakeup_source_prepare(struct wakeup_source *ws, const char *name);
  85 extern struct wakeup_source *wakeup_source_create(const char *name);
  86 extern void wakeup_source_destroy(struct wakeup_source *ws);
  87 extern void wakeup_source_add(struct wakeup_source *ws);
  88 extern void wakeup_source_remove(struct wakeup_source *ws);
  89 extern struct wakeup_source *wakeup_source_register(const char *name);
  90 extern void wakeup_source_unregister(struct wakeup_source *ws);
  91 extern int device_wakeup_enable(struct device *dev);
  92 extern int device_wakeup_disable(struct device *dev);
  93 extern void device_set_wakeup_capable(struct device *dev, bool capable);
  94 extern int device_init_wakeup(struct device *dev, bool val);
  95 extern int device_set_wakeup_enable(struct device *dev, bool enable);
  96 extern void __pm_stay_awake(struct wakeup_source *ws);
  97 extern void pm_stay_awake(struct device *dev);
  98 extern void __pm_relax(struct wakeup_source *ws);
  99 extern void pm_relax(struct device *dev);
 100 extern void pm_wakeup_ws_event(struct wakeup_source *ws, unsigned int msec, bool hard);
 101 extern void pm_wakeup_dev_event(struct device *dev, unsigned int msec, bool hard);
 102
 103 #else /* !CONFIG_PM_SLEEP */
 104
 105 static inline void device_set_wakeup_capable(struct device *dev, bool capable)
 106 {
 107         dev->power.can_wakeup = capable;
 108 }
 109
 110 static inline bool device_can_wakeup(struct device *dev)
 111 {
 112         return dev->power.can_wakeup;
 113 }
 114
 115 static inline void wakeup_source_prepare(struct wakeup_source *ws,
 116                                          const char *name) {}
 117
 118 static inline struct wakeup_source *wakeup_source_create(const char *name)
 119 {
 120         return NULL;
 121 }
 122
 123 static inline void wakeup_source_destroy(struct wakeup_source *ws) {}
 124
 125 static inline void wakeup_source_add(struct wakeup_source *ws) {}
 126
 127 static inline void wakeup_source_remove(struct wakeup_source *ws) {}
 128
 129 static inline struct wakeup_source *wakeup_source_register(const char *name)
 130 {
 131         return NULL;
 132 }
 133
 134 static inline void wakeup_source_unregister(struct wakeup_source *ws) {}
 135
 136 static inline int device_wakeup_enable(struct device *dev)
 137 {
 138         dev->power.should_wakeup = true;
 139         return 0;
 140 }
 141
 142 static inline int device_wakeup_disable(struct device *dev)
 143 {
 144         dev->power.should_wakeup = false;
 145         return 0;
 146 }
 147
 148 static inline int device_set_wakeup_enable(struct device *dev, bool enable)
 149 {
 150         dev->power.should_wakeup = enable;
 151         return 0;
 152 }
 153
 154 static inline int device_init_wakeup(struct device *dev, bool val)
 155 {
 156         device_set_wakeup_capable(dev, val);
 157         device_set_wakeup_enable(dev, val);
 158         return 0;
 159 }
 160
 161 static inline bool device_may_wakeup(struct device *dev)
 162 {
 163         return dev->power.can_wakeup && dev->power.should_wakeup;
 164 }
 165
 166 static inline void device_set_wakeup_path(struct device *dev) {}
 167
 168 static inline void __pm_stay_awake(struct wakeup_source *ws) {}
 169
 170 static inline void pm_stay_awake(struct device *dev) {}
 171
 172 static inline void __pm_relax(struct wakeup_source *ws) {}
 173
 174 static inline void pm_relax(struct device *dev) {}
 175
 176 static inline void pm_wakeup_ws_event(struct wakeup_source *ws,
 177                                       unsigned int msec, bool hard) {}
 178
 179 static inline void pm_wakeup_dev_event(struct device *dev, unsigned int msec,
 180                                        bool hard) {}
 181
 182 #endif /* !CONFIG_PM_SLEEP */
 183
 184 static inline void wakeup_source_init(struct wakeup_source *ws,
 185                                       const char *name)
 186 {
 187         wakeup_source_prepare(ws, name);
 188         wakeup_source_add(ws);
 189 }
 190
 191 static inline void __pm_wakeup_event(struct wakeup_source *ws, unsigned int msec)
 192 {
 193         return pm_wakeup_ws_event(ws, msec, false);
 194 }
 195
 196 static inline void pm_wakeup_event(struct device *dev, unsigned int msec)
 197 {
 198         return pm_wakeup_dev_event(dev, msec, false);
 199 }
 200
 201 static inline void pm_wakeup_hard_event(struct device *dev)
 202 {
 203         return pm_wakeup_dev_event(dev, 0, true);
 204 }
 205
 206 #endif /* _LINUX_PM_WAKEUP_H */