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8b258cc8ac
Commit 4ca46ff3e0 (PM / Sleep: Mark
devices involved in wakeup signaling during suspend) introduced
the power.wakeup_path field in struct dev_pm_info to mark devices
whose children are enabled to wake up the system from sleep states,
so that power domains containing the parents that provide their
children with wakeup power and/or relay their wakeup signals are not
turned off. Unfortunately, that introduced a PM regression on SH7372
whose power consumption in the system "memory sleep" state increased
as a result of it, because it prevented the power domain containing
the I2C controller from being turned off when some children of that
controller were enabled to wake up the system, although the
controller was not necessary for them to signal wakeup.
To fix this issue use the observation that devices whose
power.ignore_children flag is set for runtime PM should be treated
analogously during system suspend. Namely, they shouldn't be
included in wakeup paths going through their children. Since the
SH7372 I2C controller's power.ignore_children flag is set, doing so
will restore the previous behavior of that SOC.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
250 lines
7.2 KiB
C
250 lines
7.2 KiB
C
/*
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* pm_runtime.h - Device run-time power management helper functions.
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*
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* Copyright (C) 2009 Rafael J. Wysocki <rjw@sisk.pl>
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*
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* This file is released under the GPLv2.
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*/
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#ifndef _LINUX_PM_RUNTIME_H
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#define _LINUX_PM_RUNTIME_H
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#include <linux/device.h>
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#include <linux/notifier.h>
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#include <linux/pm.h>
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#include <linux/jiffies.h>
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/* Runtime PM flag argument bits */
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#define RPM_ASYNC 0x01 /* Request is asynchronous */
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#define RPM_NOWAIT 0x02 /* Don't wait for concurrent
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state change */
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#define RPM_GET_PUT 0x04 /* Increment/decrement the
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usage_count */
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#define RPM_AUTO 0x08 /* Use autosuspend_delay */
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#ifdef CONFIG_PM_RUNTIME
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extern struct workqueue_struct *pm_wq;
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extern int __pm_runtime_idle(struct device *dev, int rpmflags);
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extern int __pm_runtime_suspend(struct device *dev, int rpmflags);
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extern int __pm_runtime_resume(struct device *dev, int rpmflags);
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extern int pm_schedule_suspend(struct device *dev, unsigned int delay);
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extern int __pm_runtime_set_status(struct device *dev, unsigned int status);
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extern int pm_runtime_barrier(struct device *dev);
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extern void pm_runtime_enable(struct device *dev);
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extern void __pm_runtime_disable(struct device *dev, bool check_resume);
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extern void pm_runtime_allow(struct device *dev);
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extern void pm_runtime_forbid(struct device *dev);
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extern int pm_generic_runtime_idle(struct device *dev);
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extern int pm_generic_runtime_suspend(struct device *dev);
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extern int pm_generic_runtime_resume(struct device *dev);
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extern void pm_runtime_no_callbacks(struct device *dev);
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extern void pm_runtime_irq_safe(struct device *dev);
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extern void __pm_runtime_use_autosuspend(struct device *dev, bool use);
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extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay);
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extern unsigned long pm_runtime_autosuspend_expiration(struct device *dev);
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static inline bool pm_children_suspended(struct device *dev)
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{
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return dev->power.ignore_children
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|| !atomic_read(&dev->power.child_count);
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}
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static inline void pm_runtime_get_noresume(struct device *dev)
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{
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atomic_inc(&dev->power.usage_count);
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}
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static inline void pm_runtime_put_noidle(struct device *dev)
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{
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atomic_add_unless(&dev->power.usage_count, -1, 0);
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}
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static inline bool device_run_wake(struct device *dev)
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{
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return dev->power.run_wake;
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}
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static inline void device_set_run_wake(struct device *dev, bool enable)
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{
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dev->power.run_wake = enable;
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}
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static inline bool pm_runtime_suspended(struct device *dev)
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{
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return dev->power.runtime_status == RPM_SUSPENDED
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&& !dev->power.disable_depth;
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}
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static inline bool pm_runtime_status_suspended(struct device *dev)
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{
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return dev->power.runtime_status == RPM_SUSPENDED;
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}
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static inline bool pm_runtime_enabled(struct device *dev)
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{
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return !dev->power.disable_depth;
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}
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static inline bool pm_runtime_callbacks_present(struct device *dev)
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{
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return !dev->power.no_callbacks;
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}
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static inline void pm_runtime_mark_last_busy(struct device *dev)
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{
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ACCESS_ONCE(dev->power.last_busy) = jiffies;
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}
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#else /* !CONFIG_PM_RUNTIME */
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static inline int __pm_runtime_idle(struct device *dev, int rpmflags)
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{
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return -ENOSYS;
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}
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static inline int __pm_runtime_suspend(struct device *dev, int rpmflags)
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{
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return -ENOSYS;
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}
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static inline int __pm_runtime_resume(struct device *dev, int rpmflags)
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{
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return 1;
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}
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static inline int pm_schedule_suspend(struct device *dev, unsigned int delay)
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{
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return -ENOSYS;
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}
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static inline int __pm_runtime_set_status(struct device *dev,
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unsigned int status) { return 0; }
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static inline int pm_runtime_barrier(struct device *dev) { return 0; }
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static inline void pm_runtime_enable(struct device *dev) {}
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static inline void __pm_runtime_disable(struct device *dev, bool c) {}
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static inline void pm_runtime_allow(struct device *dev) {}
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static inline void pm_runtime_forbid(struct device *dev) {}
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static inline bool pm_children_suspended(struct device *dev) { return false; }
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static inline void pm_runtime_get_noresume(struct device *dev) {}
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static inline void pm_runtime_put_noidle(struct device *dev) {}
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static inline bool device_run_wake(struct device *dev) { return false; }
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static inline void device_set_run_wake(struct device *dev, bool enable) {}
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static inline bool pm_runtime_suspended(struct device *dev) { return false; }
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static inline bool pm_runtime_status_suspended(struct device *dev) { return false; }
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static inline bool pm_runtime_enabled(struct device *dev) { return false; }
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static inline int pm_generic_runtime_idle(struct device *dev) { return 0; }
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static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; }
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static inline int pm_generic_runtime_resume(struct device *dev) { return 0; }
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static inline void pm_runtime_no_callbacks(struct device *dev) {}
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static inline void pm_runtime_irq_safe(struct device *dev) {}
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static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; }
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static inline void pm_runtime_mark_last_busy(struct device *dev) {}
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static inline void __pm_runtime_use_autosuspend(struct device *dev,
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bool use) {}
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static inline void pm_runtime_set_autosuspend_delay(struct device *dev,
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int delay) {}
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static inline unsigned long pm_runtime_autosuspend_expiration(
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struct device *dev) { return 0; }
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#endif /* !CONFIG_PM_RUNTIME */
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static inline int pm_runtime_idle(struct device *dev)
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{
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return __pm_runtime_idle(dev, 0);
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}
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static inline int pm_runtime_suspend(struct device *dev)
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{
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return __pm_runtime_suspend(dev, 0);
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}
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static inline int pm_runtime_autosuspend(struct device *dev)
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{
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return __pm_runtime_suspend(dev, RPM_AUTO);
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}
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static inline int pm_runtime_resume(struct device *dev)
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{
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return __pm_runtime_resume(dev, 0);
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}
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static inline int pm_request_idle(struct device *dev)
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{
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return __pm_runtime_idle(dev, RPM_ASYNC);
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}
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static inline int pm_request_resume(struct device *dev)
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{
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return __pm_runtime_resume(dev, RPM_ASYNC);
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}
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static inline int pm_request_autosuspend(struct device *dev)
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{
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return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO);
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}
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static inline int pm_runtime_get(struct device *dev)
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{
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return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC);
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}
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static inline int pm_runtime_get_sync(struct device *dev)
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{
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return __pm_runtime_resume(dev, RPM_GET_PUT);
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}
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static inline int pm_runtime_put(struct device *dev)
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{
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return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC);
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}
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static inline int pm_runtime_put_autosuspend(struct device *dev)
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{
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return __pm_runtime_suspend(dev,
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RPM_GET_PUT | RPM_ASYNC | RPM_AUTO);
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}
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static inline int pm_runtime_put_sync(struct device *dev)
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{
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return __pm_runtime_idle(dev, RPM_GET_PUT);
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}
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static inline int pm_runtime_put_sync_suspend(struct device *dev)
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{
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return __pm_runtime_suspend(dev, RPM_GET_PUT);
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}
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static inline int pm_runtime_put_sync_autosuspend(struct device *dev)
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{
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return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO);
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}
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static inline int pm_runtime_set_active(struct device *dev)
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{
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return __pm_runtime_set_status(dev, RPM_ACTIVE);
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}
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static inline void pm_runtime_set_suspended(struct device *dev)
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{
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__pm_runtime_set_status(dev, RPM_SUSPENDED);
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}
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static inline void pm_runtime_disable(struct device *dev)
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{
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__pm_runtime_disable(dev, true);
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}
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static inline void pm_runtime_use_autosuspend(struct device *dev)
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{
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__pm_runtime_use_autosuspend(dev, true);
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}
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static inline void pm_runtime_dont_use_autosuspend(struct device *dev)
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{
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__pm_runtime_use_autosuspend(dev, false);
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}
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#endif
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