b4941adb24
Some user might want to go through all registered wakeup sources and doing things accordingly. For example, SoC PM driver might need to do HW programming to prevent powering down specific IP which wakeup source depending on. So add this API to help walk through all registered wakeup source objects on that list and return them one by one. Signed-off-by: Ran Wang <ran.wang_1@nxp.com> Tested-by: Leonard Crestez <leonard.crestez@nxp.com> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Li Yang <leoyang.li@nxp.com>
211 lines
6.1 KiB
C
211 lines
6.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* pm_wakeup.h - Power management wakeup interface
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*
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* Copyright (C) 2008 Alan Stern
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* Copyright (C) 2010 Rafael J. Wysocki, Novell Inc.
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*/
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#ifndef _LINUX_PM_WAKEUP_H
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#define _LINUX_PM_WAKEUP_H
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#ifndef _DEVICE_H_
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# error "please don't include this file directly"
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#endif
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#include <linux/types.h>
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struct wake_irq;
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/**
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* struct wakeup_source - Representation of wakeup sources
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*
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* @name: Name of the wakeup source
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* @id: Wakeup source id
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* @entry: Wakeup source list entry
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* @lock: Wakeup source lock
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* @wakeirq: Optional device specific wakeirq
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* @timer: Wakeup timer list
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* @timer_expires: Wakeup timer expiration
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* @total_time: Total time this wakeup source has been active.
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* @max_time: Maximum time this wakeup source has been continuously active.
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* @last_time: Monotonic clock when the wakeup source's was touched last time.
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* @prevent_sleep_time: Total time this source has been preventing autosleep.
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* @event_count: Number of signaled wakeup events.
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* @active_count: Number of times the wakeup source was activated.
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* @relax_count: Number of times the wakeup source was deactivated.
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* @expire_count: Number of times the wakeup source's timeout has expired.
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* @wakeup_count: Number of times the wakeup source might abort suspend.
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* @dev: Struct device for sysfs statistics about the wakeup source.
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* @active: Status of the wakeup source.
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* @autosleep_enabled: Autosleep is active, so update @prevent_sleep_time.
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*/
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struct wakeup_source {
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const char *name;
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int id;
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struct list_head entry;
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spinlock_t lock;
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struct wake_irq *wakeirq;
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struct timer_list timer;
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unsigned long timer_expires;
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ktime_t total_time;
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ktime_t max_time;
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ktime_t last_time;
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ktime_t start_prevent_time;
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ktime_t prevent_sleep_time;
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unsigned long event_count;
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unsigned long active_count;
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unsigned long relax_count;
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unsigned long expire_count;
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unsigned long wakeup_count;
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struct device *dev;
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bool active:1;
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bool autosleep_enabled:1;
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};
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#define for_each_wakeup_source(ws) \
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for ((ws) = wakeup_sources_walk_start(); \
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(ws); \
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(ws) = wakeup_sources_walk_next((ws)))
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#ifdef CONFIG_PM_SLEEP
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/*
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* Changes to device_may_wakeup take effect on the next pm state change.
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*/
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static inline bool device_can_wakeup(struct device *dev)
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{
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return dev->power.can_wakeup;
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}
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static inline bool device_may_wakeup(struct device *dev)
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{
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return dev->power.can_wakeup && !!dev->power.wakeup;
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}
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static inline void device_set_wakeup_path(struct device *dev)
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{
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dev->power.wakeup_path = true;
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}
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/* drivers/base/power/wakeup.c */
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extern struct wakeup_source *wakeup_source_create(const char *name);
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extern void wakeup_source_destroy(struct wakeup_source *ws);
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extern void wakeup_source_add(struct wakeup_source *ws);
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extern void wakeup_source_remove(struct wakeup_source *ws);
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extern struct wakeup_source *wakeup_source_register(struct device *dev,
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const char *name);
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extern void wakeup_source_unregister(struct wakeup_source *ws);
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extern int wakeup_sources_read_lock(void);
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extern void wakeup_sources_read_unlock(int idx);
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extern struct wakeup_source *wakeup_sources_walk_start(void);
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extern struct wakeup_source *wakeup_sources_walk_next(struct wakeup_source *ws);
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extern int device_wakeup_enable(struct device *dev);
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extern int device_wakeup_disable(struct device *dev);
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extern void device_set_wakeup_capable(struct device *dev, bool capable);
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extern int device_init_wakeup(struct device *dev, bool val);
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extern int device_set_wakeup_enable(struct device *dev, bool enable);
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extern void __pm_stay_awake(struct wakeup_source *ws);
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extern void pm_stay_awake(struct device *dev);
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extern void __pm_relax(struct wakeup_source *ws);
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extern void pm_relax(struct device *dev);
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extern void pm_wakeup_ws_event(struct wakeup_source *ws, unsigned int msec, bool hard);
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extern void pm_wakeup_dev_event(struct device *dev, unsigned int msec, bool hard);
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#else /* !CONFIG_PM_SLEEP */
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static inline void device_set_wakeup_capable(struct device *dev, bool capable)
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{
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dev->power.can_wakeup = capable;
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}
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static inline bool device_can_wakeup(struct device *dev)
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{
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return dev->power.can_wakeup;
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}
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static inline struct wakeup_source *wakeup_source_create(const char *name)
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{
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return NULL;
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}
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static inline void wakeup_source_destroy(struct wakeup_source *ws) {}
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static inline void wakeup_source_add(struct wakeup_source *ws) {}
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static inline void wakeup_source_remove(struct wakeup_source *ws) {}
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static inline struct wakeup_source *wakeup_source_register(struct device *dev,
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const char *name)
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{
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return NULL;
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}
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static inline void wakeup_source_unregister(struct wakeup_source *ws) {}
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static inline int device_wakeup_enable(struct device *dev)
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{
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dev->power.should_wakeup = true;
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return 0;
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}
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static inline int device_wakeup_disable(struct device *dev)
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{
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dev->power.should_wakeup = false;
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return 0;
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}
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static inline int device_set_wakeup_enable(struct device *dev, bool enable)
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{
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dev->power.should_wakeup = enable;
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return 0;
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}
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static inline int device_init_wakeup(struct device *dev, bool val)
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{
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device_set_wakeup_capable(dev, val);
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device_set_wakeup_enable(dev, val);
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return 0;
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}
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static inline bool device_may_wakeup(struct device *dev)
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{
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return dev->power.can_wakeup && dev->power.should_wakeup;
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}
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static inline void device_set_wakeup_path(struct device *dev) {}
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static inline void __pm_stay_awake(struct wakeup_source *ws) {}
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static inline void pm_stay_awake(struct device *dev) {}
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static inline void __pm_relax(struct wakeup_source *ws) {}
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static inline void pm_relax(struct device *dev) {}
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static inline void pm_wakeup_ws_event(struct wakeup_source *ws,
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unsigned int msec, bool hard) {}
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static inline void pm_wakeup_dev_event(struct device *dev, unsigned int msec,
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bool hard) {}
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#endif /* !CONFIG_PM_SLEEP */
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static inline void __pm_wakeup_event(struct wakeup_source *ws, unsigned int msec)
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{
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return pm_wakeup_ws_event(ws, msec, false);
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}
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static inline void pm_wakeup_event(struct device *dev, unsigned int msec)
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{
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return pm_wakeup_dev_event(dev, msec, false);
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}
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static inline void pm_wakeup_hard_event(struct device *dev)
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{
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return pm_wakeup_dev_event(dev, 0, true);
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}
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#endif /* _LINUX_PM_WAKEUP_H */
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