mirror of https://gitee.com/openkylin/linux.git
7483b4a4d9
Introduce a mechanism by which the kernel can trigger global transitions to a sleep state chosen by user space if there are no active wakeup sources. It consists of a new sysfs attribute, /sys/power/autosleep, that can be written one of the strings returned by reads from /sys/power/state, an ordered workqueue and a work item carrying out the "suspend" operations. If a string representing the system's sleep state is written to /sys/power/autosleep, the work item triggering transitions to that state is queued up and it requeues itself after every execution until user space writes "off" to /sys/power/autosleep. That work item enables the detection of wakeup events using the functions already defined in drivers/base/power/wakeup.c (with one small modification) and calls either pm_suspend(), or hibernate() to put the system into a sleep state. If a wakeup event is reported while the transition is in progress, it will abort the transition and the "system suspend" work item will be queued up again. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: NeilBrown <neilb@suse.de> |
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| .. | ||
| Makefile | ||
| clock_ops.c | ||
| common.c | ||
| domain.c | ||
| domain_governor.c | ||
| generic_ops.c | ||
| main.c | ||
| opp.c | ||
| power.h | ||
| qos.c | ||
| runtime.c | ||
| sysfs.c | ||
| trace.c | ||
| wakeup.c | ||