litmus-rt.git/kernel/power/Kconfig, branch linux-tip

PM / OPP: Hide OPP configuration when SoCs do not provide an implementation

2010-11-11T00:51:26+00:00

Since the OPP API is only useful with an appropraite SoC-specific
implementation there is no point in offering the ability to enable
the API on general systems. Provide an ARCH_HAS OPP Kconfig symbol
which masks out the option unless selected by an implementation.

Signed-off-by: Mark Brown 
Acked-by: Nishanth Menon 
Acked-by: Kevin Hilman 
Signed-off-by: Rafael J. Wysocki

PM: Introduce library for device-specific OPPs (v7)

2010-10-16T23:57:50+00:00

SoCs have a standard set of tuples consisting of frequency and
voltage pairs that the device will support per voltage domain. These
are called Operating Performance Points or OPPs. The actual
definitions of OPP varies over silicon versions. For a specific domain,
we can have a set of {frequency, voltage} pairs. As the kernel boots
and more information is available, a default set of these are activated
based on the precise nature of device. Further on operation, based on
conditions prevailing in the system (such as temperature), some OPP
availability may be temporarily controlled by the SoC frameworks.

To implement an OPP, some sort of power management support is necessary
hence this library depends on CONFIG_PM.

Contributions include:
Sanjeev Premi for the initial concept:
	http://patchwork.kernel.org/patch/50998/
Kevin Hilman for converting original design to device-based.
Kevin Hilman and Paul Walmsey for cleaning up many of the function
abstractions, improvements and data structure handling.
Romit Dasgupta for using enums instead of opp pointers.
Thara Gopinath, Eduardo Valentin and Vishwanath BS for fixes and
cleanups.
Linus Walleij for recommending this layer be made generic for usage
in other architectures beyond OMAP and ARM.
Mark Brown, Andrew Morton, Rafael J. Wysocki, Paul E. McKenney for
valuable improvements.

Discussions and comments from:
http://marc.info/?l=linux-omap&m=126033945313269&w=2
http://marc.info/?l=linux-omap&m=125482970102327&w=2
http://marc.info/?t=125809247500002&r=1&w=2
http://marc.info/?l=linux-omap&m=126025973426007&w=2
http://marc.info/?t=128152609200064&r=1&w=2
http://marc.info/?t=128468723000002&r=1&w=2
incorporated.

v1: http://marc.info/?t=128468723000002&r=1&w=2

Signed-off-by: Nishanth Menon 
Signed-off-by: Kevin Hilman 
Signed-off-by: Rafael J. Wysocki

PM: Fix unmet dependency warning from kconfig

2010-10-16T23:57:42+00:00

Fix the following build warning:

warning: (PM_SLEEP_SMP && SMP && (ARCH_SUSPEND_POSSIBLE || \
ARCH_HIBERNATION_POSSIBLE) && PM_SLEEP) selects HOTPLUG_CPU which \
has unmet direct dependencies (SMP && HOTPLUG)

by selecting HOTPLUG along with CPU_HOTPLUG.

Signed-off-by: Rafael J. Wysocki 
Acked-by: Randy Dunlap

PM / Hibernate: Compress hibernation image with LZO

2010-10-16T23:57:42+00:00

Compress hibernation image with LZO in order to save on I/O and
therefore time to hibernate/thaw.

[rjw: Added hibernate=nocompress command line option instead of just
 nocompress which would be confusing, fixed a couple of compiler
 warnings, fixed kerneldoc comments, minor cleanups.]

Signed-off-by: Bojan Smojver 
Signed-off-by: Rafael J. Wysocki

suspend: Move NVS save/restore code to generic suspend functionality

2010-06-10T15:02:34+00:00

Saving platform non-volatile state may be required for suspend to RAM as
well as hibernation. Move it to more generic code.

Signed-off-by: Matthew Garrett 
Acked-by: Rafael J. Wysocki 
Tested-by: Maxim Levitsky 
Signed-off-by: Len Brown

PM: Add facility for advanced testing of async suspend/resume

2010-02-26T19:39:10+00:00

Add configuration switch CONFIG_PM_ADVANCED_DEBUG for compiling in
extra PM debugging/testing code allowing one to access some
PM-related attributes of devices from the user space via sysfs.

If CONFIG_PM_ADVANCED_DEBUG is set, add sysfs attribute power/async
for every device allowing the user space to access the device's
power.async_suspend flag and modify it, if desired.

Signed-off-by: Rafael J. Wysocki

PCI PM: Run-time callbacks for PCI bus type

2010-02-23T00:21:19+00:00

Introduce run-time PM callbacks for the PCI bus type.  Make the new
callbacks work in analogy with the existing system sleep PM
callbacks, so that the drivers already converted to struct dev_pm_ops
can use their suspend and resume routines for run-time PM without
modifications.

Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Jesse Barnes

PM: Introduce core framework for run-time PM of I/O devices (rev. 17)

2009-08-22T22:04:44+00:00

Introduce a core framework for run-time power management of I/O
devices.  Add device run-time PM fields to 'struct dev_pm_info'
and device run-time PM callbacks to 'struct dev_pm_ops'.  Introduce
a run-time PM workqueue and define some device run-time PM helper
functions at the core level.  Document all these things.

Special thanks to Alan Stern for his help with the design and
multiple detailed reviews of the pereceding versions of this patch
and to Magnus Damm for testing feedback.

Signed-off-by: Rafael J. Wysocki 
Acked-by: Magnus Damm

PM/Hibernate: Move NVS routines into a seperate file (v2).

2009-06-12T19:32:33+00:00

The *_nvs_* routines in swsusp.c make use of the io*map()
functions, which are only provided for HAS_IOMEM, thus
breaking compilation if HAS_IOMEM is not set. Fix this
by moving the *_nvs_* routines into hibernate_nvs.c, which
is only compiled if HAS_IOMEM is set.

[rjw: Change the name of the new file to hibernate_nvs.c, add the
 license line to the header comment.]

Signed-off-by: Cornelia Huck 
Acked-by: Pavel Machek 
Signed-off-by: Rafael J. Wysocki

PM_TEST_SUSPEND should depend on RTC_CLASS, not RTC_LIB

2008-11-01T19:40:38+00:00

Insufficient dependency - we really want CONFIG_RTC_CLASS=y there.
That will give us CONFIG_RTC_LIB=y, so the old dependency can be
simply replaced.

Signed-off-by: Al Viro 
Signed-off-by: Linus Torvalds