linux/include
Ulf Hansson cf04ce7841 PM / wakeup: Add device_set_wakeup_path() helper to control wakeup path
During system suspend, a driver may find that the wakeup setting is
enabled for its device and therefore configures it to deliver system
wakeup signals.

Additionally, sometimes the driver and its device, relies on some
further consumed resource, like an irqchip or a phy for example, to
stay powered on, as to be able to deliver system wakeup signals.

In general the driver deals with this, via raising an "enable count"
of the consumed resource or via a subsystem specific API, like
irq_set_irq_wake() or enable|disable_irq_wake() for an irqchip.
However, this may not be sufficient in cases when the resource's
device may be attached to a PM domain (genpd for example) or is
handled by a non-trivial middle layer (PCI for example).

To address cases like these, the existing ->dev.power.wakeup_path
status flag is there to help.  As a matter of fact, genpd already
monitors the flag during system suspend and acts accordingly.

However, so far it has not been clear, if anybody else but the PM
core is allowed to set the ->dev.power.wakeup_path status flag,
which is required to make this work.  For this reason, introduce
a new helper function, device_set_wakeup_path() for that.

Typically, a driver that manages a resource needed in the wakeup path
should call device_set_wakeup_path() from its ->suspend() or
->suspend_late() callback.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-01-09 13:09:17 +01:00
..
acpi Merge branch 'acpi-ec' into acpi 2017-11-30 13:37:29 +01:00
asm-generic mm: switch to 'define pmd_write' instead of __HAVE_ARCH_PMD_WRITE 2017-11-29 18:40:42 -08:00
clocksource arm64 updates for 4.15 2017-11-15 10:56:56 -08:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2017-11-28 16:22:10 -08:00
drm drm: safely free connectors from connector_iter 2017-12-06 10:22:55 +01:00
dt-bindings fixes/cleanups for rc1, non-desktop flags for VR 2017-11-23 21:04:56 -10:00
keys
kvm KVM: arm/arm64: Don't enable/disable physical timer access on VHE 2017-11-29 16:46:09 +01:00
linux PM / wakeup: Add device_set_wakeup_path() helper to control wakeup path 2018-01-09 13:09:17 +01:00
math-emu
media media updates for v4.15-rc1 2017-11-15 20:30:12 -08:00
memory
misc
net tcp: invalidate rate samples during SACK reneging 2017-12-08 10:07:02 -05:00
pcmcia
ras
rdma Updates for 4.15 kernel merge window 2017-11-15 14:54:53 -08:00
scsi scsi: libsas: align sata_device's rps_resp on a cacheline 2017-11-21 23:06:32 -05:00
soc We have two changes to the core framework this time around. The first being a 2017-11-17 20:04:24 -08:00
sound ALSA: hda - Fix yet remaining issue with vmaster 0dB initialization 2017-11-22 12:34:56 +01:00
target Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2017-11-24 19:19:20 -10:00
trace Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf 2017-12-03 13:08:30 -05:00
uapi KVM fixes for v4.15-rc3 2017-12-10 08:24:16 -08:00
video fbdev changes for v4.15: 2017-11-20 21:50:24 -10:00
xen xen: features and fixes for v4.15-rc1 2017-11-16 13:06:27 -08:00