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linux/drivers/base
Rafael J. Wysocki 00dc9ad18d PM / Runtime: Use device PM QoS constraints (v2)
Make the runtime PM core use device PM QoS constraints to check if
it is allowed to suspend a given device, so that an error code is
returned if the device's own PM QoS constraint is negative or one of
its children has already been suspended for too long.  If this is
not the case, the maximum estimated time the device is allowed to be
suspended, computed as the minimum of the device's PM QoS constraint
and the PM QoS constraints of its children (reduced by the difference
between the current time and their suspend times) is stored in a new
device's PM field power.max_time_suspended_ns that can be used by
the device's subsystem or PM domain to decide whether or not to put
the device into lower-power (and presumably higher-latency) states
later (if the constraint is 0, which means "no constraint", the
power.max_time_suspended_ns is set to -1).

Additionally, the time of execution of the subsystem-level
.runtime_suspend() callback for the device is recorded in the new
power.suspend_time field for later use by the device's subsystem or
PM domain along with power.max_time_suspended_ns (it also is used
by the core code when the device's parent is suspended).

Introduce a new helper function,
pm_runtime_update_max_time_suspended(), allowing subsystems and PM
domains (or device drivers) to update the power.max_time_suspended_ns
field, for example after changing the power state of a suspended
device.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
2011-12-01 21:46:42 +01:00
..
power PM / Runtime: Use device PM QoS constraints (v2) 2011-12-01 21:46:42 +01:00
regmap drivers/base: Add export.h for EXPORT_SYMBOL/THIS_MODULE as required. 2011-10-31 19:31:38 -04:00
attribute_container.c
base.h drivers/base: base.h implicitly depends on <linux/notifier.h> 2011-10-31 19:31:39 -04:00
bus.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2011-01-13 10:05:56 -08:00
class.c class: Implement support for class attrs in tagged sysfs directories. 2011-10-19 19:24:15 -04:00
core.c PM / driver core: disable device's runtime PM during shutdown 2011-11-15 21:52:29 +01:00
cpu.c
dd.c drivers: base: print rejected matches with DEBUG_DRIVER 2011-09-26 16:21:15 -07:00
devres.c base/devres.c: quiet sparse noise about context imbalance 2011-08-22 14:12:24 -07:00
devtmpfs.c drivers/base/devtmpfs.c: correct annotation of `setup_done' 2011-08-08 13:53:50 -07:00
dma-coherent.c drivers/base: dma-coherent.c is a module and needs module.h 2011-10-31 19:31:38 -04:00
dma-mapping.c drivers/base: Add export.h for EXPORT_SYMBOL/THIS_MODULE as required. 2011-10-31 19:31:38 -04:00
driver.c
firmware_class.c firmware loader: allow builtin firmware load even if usermodehelper is disabled 2011-08-24 15:55:30 -07:00
firmware.c
hypervisor.c drivers/base: Add export.h for EXPORT_SYMBOL/THIS_MODULE as required. 2011-10-31 19:31:38 -04:00
init.c
isa.c
Kconfig Merge branch 'driver-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 2011-07-25 23:06:24 -07:00
Makefile Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap 2011-07-23 11:14:47 -07:00
map.c
memory.c mm: memory hotplug: Check if pages are correctly reserved on a per-section basis 2011-10-18 14:01:24 -07:00
module.c
node.c drivers/base/node.c: fix compilation error with older versions of gcc 2011-11-18 10:39:24 -08:00
platform.c Merge branch 'driver-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core 2011-10-25 12:13:59 +02:00
sys.c PM: Remove sysdev suspend, resume and shutdown operations 2011-05-11 21:37:15 +02:00
syscore.c PM: Reintroduce dropped call to check_wakeup_irqs 2011-07-11 10:51:49 +02:00
topology.c topology/sysfs: Provide book id and siblings attributes 2010-09-09 20:41:25 +02:00
transport_class.c drivers/base: transport_class explicitly requires EXPORT_SYMBOL 2011-10-31 19:31:15 -04:00