24 Dec, 2010
2 commits
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basic-pm-debugging.txt is located in Documentation/power/ not
Documents/power/. Change the references in
Documentation/power/drivers-testing.txt to reflect the location.Signed-off-by: Jon Mason
Signed-off-by: Rafael J. Wysocki -
This patch (as1431c) makes the synchronous runtime-PM interface
suitable for use in interrupt handlers. Subsystems can call the new
pm_runtime_irq_safe() function to tell the PM core that a device's
runtime_suspend and runtime_resume callbacks should be invoked with
interrupts disabled and the spinlock held. This permits the
pm_runtime_get_sync() and the new pm_runtime_put_sync_suspend()
routines to be called from within interrupt handlers.When a device is declared irq-safe in this way, the PM core increments
the parent's usage count, so the parent will never be runtime
suspended. This prevents difficult situations in which an irq-safe
device can't resume because it is forced to wait for its non-irq-safe
parent.Signed-off-by: Alan Stern
Signed-off-by: Rafael J. Wysocki
17 Dec, 2010
1 commit
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There are some situations (e.g. in __pm_generic_call()), where
pm_runtime_suspended() is used to decide whether or not to execute
a device's (system) ->suspend() callback. The callback is not
executed if pm_runtime_suspended() returns true, but it does so
for devices that don't even support runtime PM, because the
power.disable_depth device field is ignored by it. This leads to
problems (i.e. devices are not suspened when they should), so rework
pm_runtime_suspended() so that it returns false if the device's
power.disable_depth field is different from zero.Signed-off-by: Rafael J. Wysocki
Cc: stable@kernel.org
11 Nov, 2010
1 commit
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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
17 Oct, 2010
6 commits
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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 -
If the device which fails to resume is part of a loadable kernel module
it won't be checked at startup against the magic number stored in the
RTC.Add a read-only sysfs attribute /sys/power/pm_trace_dev_match which
contains a list of newline separated devices (usually just the one)
which currently match the last magic number. This allows the device
which is failing to resume to be found after the modules are loaded
again.Signed-off-by: James Hogan
Signed-off-by: Rafael J. Wysocki -
This patch (as1427) implements the "autosuspend" facility for runtime
PM. A few new fields are added to the dev_pm_info structure and
several new PM helper functions are defined, for telling the PM core
whether or not a device uses autosuspend, for setting the autosuspend
delay, and for marking periods of device activity.Drivers that do not want to use autosuspend can continue using the
same helper functions as before; their behavior will not change. In
addition, drivers supporting autosuspend can also call the old helper
functions to get the old behavior.The details are all explained in Documentation/power/runtime_pm.txt
and Documentation/ABI/testing/sysfs-devices-power.Signed-off-by: Alan Stern
Signed-off-by: Rafael J. Wysocki -
Some devices, such as USB interfaces, cannot be power-managed
independently of their parents, i.e., they cannot be put in low power
while the parent remains at full power. This patch (as1425) creates a
new "no_callbacks" flag, which tells the PM core not to invoke the
runtime-PM callback routines for the such devices but instead to
assume that the callbacks always succeed. In addition, the
non-debugging runtime-PM sysfs attributes for the devices are removed,
since they are pretty much meaningless.The advantage of this scheme comes not so much from avoiding the
callbacks themselves, but rather from the fact that without the need
for a process context in which to run the callbacks, more work can be
done in interrupt context.Signed-off-by: Alan Stern
Signed-off-by: Rafael J. Wysocki -
The default hibernation image size is currently hard coded and euqal
to 500 MB, which is not a reasonable default on many contemporary
systems. Make it equal 2/5 of the total RAM size (this is slightly
below the maximum, i.e. 1/2 of the total RAM size, and seems to be
generally suitable).Signed-off-by: Rafael J. Wysocki
Tested-by: M. Vefa Bicakci -
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
01 Sep, 2010
1 commit
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Signed-off-by: Mark Brown
Signed-off-by: Liam Girdwood
04 Aug, 2010
1 commit
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Below you will find an updated version from the original series bunching all patches into one big patch
updating broken web addresses that are located in Documentation/*
Some of the addresses date as far far back as 1995 etc... so searching became a bit difficult,
the best way to deal with these is to use web.archive.org to locate these addresses that are outdated.
Now there are also some addresses pointing to .spec files some are located, but some(after searching
on the companies site)where still no where to be found. In this case I just changed the address
to the company site this way the users can contact the company and they can locate them for the users.Signed-off-by: Justin P. Mattock
Signed-off-by: Thomas Weber
Signed-off-by: Mike Frysinger
Cc: Paulo Marques
Cc: Randy Dunlap
Cc: Michael Neuling
Signed-off-by: Jiri Kosina
19 Jul, 2010
1 commit
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pavel@suse.cz no longer works, replace it with working address.
Signed-off-by: Pavel Machek
Signed-off-by: Jiri Kosina
22 May, 2010
1 commit
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* 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: (36 commits)
PCI: hotplug: pciehp: Removed check for hotplug of display devices
PCI: read memory ranges out of Broadcom CNB20LE host bridge
PCI: Allow manual resource allocation for PCI hotplug bridges
x86/PCI: make ACPI MCFG reserved error messages ACPI specific
PCI hotplug: Use kmemdup
PM/PCI: Update PCI power management documentation
PCI: output FW warning in pci_read/write_vpd
PCI: fix typos pci_device_dis/enable to pci_dis/enable_device in comments
PCI quirks: disable msi on AMD rs4xx internal gfx bridges
PCI: Disable MSI for MCP55 on P5N32-E SLI
x86/PCI: irq and pci_ids patch for additional Intel Cougar Point DeviceIDs
PCI: aerdrv: trivial cleanup for aerdrv_core.c
PCI: aerdrv: trivial cleanup for aerdrv.c
PCI: aerdrv: introduce default_downstream_reset_link
PCI: aerdrv: rework find_aer_service
PCI: aerdrv: remove is_downstream
PCI: aerdrv: remove magical ROOT_ERR_STATUS_MASKS
PCI: aerdrv: redefine PCI_ERR_ROOT_*_SRC
PCI: aerdrv: rework do_recovery
PCI: aerdrv: rework get_e_source()
...
21 May, 2010
1 commit
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* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (44 commits)
vlynq: make whole Kconfig-menu dependant on architecture
add descriptive comment for TIF_MEMDIE task flag declaration.
EEPROM: max6875: Header file cleanup
EEPROM: 93cx6: Header file cleanup
EEPROM: Header file cleanup
agp: use NULL instead of 0 when pointer is needed
rtc-v3020: make bitfield unsigned
PCI: make bitfield unsigned
jbd2: use NULL instead of 0 when pointer is needed
cciss: fix shadows sparse warning
doc: inode uses a mutex instead of a semaphore.
uml: i386: Avoid redefinition of NR_syscalls
fix "seperate" typos in comments
cocbalt_lcdfb: correct sections
doc: Change urls for sparse
Powerpc: wii: Fix typo in comment
i2o: cleanup some exit paths
Documentation/: it's -> its where appropriate
UML: Fix compiler warning due to missing task_struct declaration
UML: add kernel.h include to signal.c
...
19 May, 2010
1 commit
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I power management document, Documentation/power/pci.txt, is
outdated and partially inaccurate. It also is missing some important
information about the power management of PCI device. Rewrite it to
make it more up to date and more complete.Reviewed-by: Randy Dunlap
Signed-off-by: Rafael J. Wysocki
11 May, 2010
4 commits
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This patch changes the string based list management to a handle base
implementation to help with the hot path use of pm-qos, it also renames
much of the API to use "request" as opposed to "requirement" that was
used in the initial implementation. I did this because request more
accurately represents what it actually does.Also, I added a string based ABI for users wanting to use a string
interface. So if the user writes 0xDDDDDDDD formatted hex it will be
accepted by the interface. (someone asked me for it and I don't think
it hurts anything.)This patch updates some documentation input I got from Randy.
Signed-off-by: markgross
Signed-off-by: Rafael J. Wysocki -
Opening and closing /dev/snapshot causes the kernel to carry out
some hibernate preparations that should be documented.[rjw: Added the changelog.]
Signed-off-by: Pavel Machek
Signed-off-by: Rafael J. Wysocki -
Improve the device power management document after it's been
updated by the previous patch.Signed-off-by: Alan Stern
Signed-off-by: Rafael J. Wysocki -
The device PM document, Documentation/power/devices.txt, is badly
outdated and requires total rework to fit the current design of the
PM framework. Make it more up to date.Signed-off-by: Rafael J. Wysocki
Reviewed-by: Randy Dunlap
23 Apr, 2010
1 commit
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Fix obvious cases of "it's" being used when "its" was meant.
Signed-off-by: Francis Galiegue
Acked-by: Randy Dunlap
Signed-off-by: Jiri Kosina
08 Mar, 2010
1 commit
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Conflicts:
Documentation/filesystems/proc.txt
arch/arm/mach-u300/include/mach/debug-macro.S
drivers/net/qlge/qlge_ethtool.c
drivers/net/qlge/qlge_main.c
drivers/net/typhoon.c
07 Mar, 2010
2 commits
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There are subsystems whose power management callbacks only need to
invoke the callbacks provided by device drivers. Still, their system
sleep PM callbacks should play well with the runtime PM callbacks,
so that devices suspended at run time can be left in that state for
a system sleep transition.Provide a set of generic PM callbacks for such subsystems and
define convenience macros for populating dev_pm_ops structures.Signed-off-by: Rafael J. Wysocki
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The power.runtime_auto device flag and the helper functions
pm_runtime_allow() and pm_runtime_forbid() used to modify it are a
part of the run-time power management framework and therefore they
should be described in Documentation/power/runtime_pm.txt.Signed-off-by: Rafael J. Wysocki
05 Feb, 2010
1 commit
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Signed-off-by: Thadeu Lima de Souza Cascardo
Signed-off-by: Jiri Kosina
23 Dec, 2009
2 commits
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This patch (as1318) updates the runtime PM documentation, adding a
section discussing the interaction between runtime PM and system sleep.[rjw: Rebased and made it agree with the other updates better.]
Signed-off-by: Alan Stern
Signed-off-by: Rafael J. Wysocki -
The power management of some devices is handled through device types
and device classes rather than through bus types. Since these
devices may also benefit from using the run-time power management
core, extend it so that the device type and device class run-time PM
callbacks can be taken into consideration by it if the bus type
callback is not defined.Update the run-time PM core documentation to reflect this change.
Signed-off-by: Rafael J. Wysocki
10 Dec, 2009
1 commit
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* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (42 commits)
tree-wide: fix misspelling of "definition" in comments
reiserfs: fix misspelling of "journaled"
doc: Fix a typo in slub.txt.
inotify: remove superfluous return code check
hdlc: spelling fix in find_pvc() comment
doc: fix regulator docs cut-and-pasteism
mtd: Fix comment in Kconfig
doc: Fix IRQ chip docs
tree-wide: fix assorted typos all over the place
drivers/ata/libata-sff.c: comment spelling fixes
fix typos/grammos in Documentation/edac.txt
sysctl: add missing comments
fs/debugfs/inode.c: fix comment typos
sgivwfb: Make use of ARRAY_SIZE.
sky2: fix sky2_link_down copy/paste comment error
tree-wide: fix typos "couter" -> "counter"
tree-wide: fix typos "offest" -> "offset"
fix kerneldoc for set_irq_msi()
spidev: fix double "of of" in comment
comment typo fix: sybsystem -> subsystem
...
06 Dec, 2009
2 commits
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Apparently, there are devices that can wake up the system from sleep
states and yet are incapable of generating wake-up events at run
time. Thus, introduce a flag indicating if given device is capable
of generating run-time wake-up events.Signed-off-by: Rafael J. Wysocki
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Currently the ->runtime_idle() callback is documented as having no
return value, but in fact it returns int. Although its return value
is ignored at the PM core level, it may be used by bus type routines
executing the drivers' ->runtime_idle() callbacks.Signed-off-by: Rafael J. Wysocki
Reported-by: Alan Stern
04 Dec, 2009
1 commit
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Minor copy-and-pasteism in the regulator docs (against
git from today):Signed-off-by: Dave Gilbert
Signed-off-by: Jiri Kosina
24 Sep, 2009
1 commit
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* git://git.infradead.org/battery-2.6:
power_supply: Add driver for the PMU on WM831x PMICs
ds2760_battery: Fix integer overflow for time_to_empty_now
wm97xx_battery: Convert to dev_pm_ops
wm97xx_battery: Use irq to detect charger state
wm97xx_battery: Use platform_data
wm97xx-core: Pass platform_data to battery
ds2760_battery: implement set_charged() feature
power_supply: get_by_name and set_charged functionality
power_supply: EXPORT_SYMBOL cleanups
ds2760_battery: add current_accum module parameter
ds2760_battery: handle full_active_uAh == 0 case correctly
ds2760_battery: add rated_capacity module parameter
ds2760_battery: export more features
ds2760_battery: delay power supply registration
wm8350_power: Implement charge type property
power_supply: Add a charge_type property, and use it for olpc driver
olpc_battery: Add an 'error' sysfs device that displays raw errors
Revert "power: remove POWER_SUPPLY_PROP_CAPACITY_LEVEL"
23 Sep, 2009
2 commits
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Conflicts:
drivers/power/wm97xx_battery.c -
Provide some brief documentation of some of the design decisions that
are made by the regulator API.Signed-off-by: Mark Brown
Signed-off-by: Liam Girdwood
22 Sep, 2009
3 commits
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Fix a couple of typos I found while working with this subsystem.
Signed-off-by: Wolfram Sang
Acked-by: Mark Brown
Signed-off-by: Liam Girdwood -
Signed-off-by: Wolfram Sang
Cc: Liam Girdwood
Cc: Mark Brown
Acked-by: Mark Brown
Signed-off-by: Liam Girdwood -
This fixes a spelling error and an API function signature mismatch
in the regulator documentation.Signed-off-by: Linus Walleij
Acked-by: Mark Brown
Signed-off-by: Liam Girdwood
23 Aug, 2009
1 commit
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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
02 Jul, 2009
1 commit
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This adds a new sysfs file called 'charge_type' which displays the
type of charging (unknown, n/a, trickle charge, or fast charging).This allows things like battery diagnostics to determine what the
battery/EC is doing without resorting to changing the 'status' sysfs
output.Signed-off-by: Andres Salomon
Acked-by: Mark Brown
Signed-off-by: Anton Vorontsov
01 Jul, 2009
1 commit
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This reverts commit 8efe444038a205e79b38b7ad03878824901849a8 and
4cbc76eadf56399cd11fb736b33c53aec9caab8c.Richard@laptop.org was apparently using CAPACITY_LEVEL for debugging
battery/EC problems, and was upset that it was removed. This readds it.Conflicts:
Documentation/power_supply_class.txt
Signed-off-by: Andres Salomon
Signed-off-by: Anton Vorontsov