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* Merge branch 'for-linus' of ↵Linus Torvalds2009-12-09
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial * '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 ...
| * doc: fix regulator docs cut-and-pasteismDr. David Alan Gilbert2009-12-04
| | | | | | | | | | | | | | | | Minor copy-and-pasteism in the regulator docs (against git from today): Signed-off-by: Dave Gilbert <linux@treblig.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* | PM: Add flag for devices capable of generating run-time wake-up eventsRafael J. Wysocki2009-12-06
| | | | | | | | | | | | | | | | | | 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 <rjw@sisk.pl>
* | PM / Runtime: Make documentation of runtime_idle() agree with the codeRafael J. Wysocki2009-12-06
|/ | | | | | | | | | 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 <rjw@sisk.pl> Reported-by: Alan Stern <stern@rowland.harvard.edu>
* Merge git://git.infradead.org/battery-2.6Linus Torvalds2009-09-23
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 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"
| * Merge branch 'master' of ↵Anton Vorontsov2009-09-22
| |\ | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 Conflicts: drivers/power/wm97xx_battery.c
| * | power_supply: Add a charge_type property, and use it for olpc driverAndres Salomon2009-07-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 <dilinger@collabora.co.uk> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
| * | Revert "power: remove POWER_SUPPLY_PROP_CAPACITY_LEVEL"Andres Salomon2009-06-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 <dilinger@collabora.co.uk> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
* | | regulator: Add some brief design documentationMark Brown2009-09-22
| | | | | | | | | | | | | | | | | | | | | | | | Provide some brief documentation of some of the design decisions that are made by the regulator API. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
* | | regulator: fix typosWolfram Sang2009-09-22
| | | | | | | | | | | | | | | | | | | | | | | | Fix a couple of typos I found while working with this subsystem. Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
* | | regulator: update a filename in documentationWolfram Sang2009-09-22
| | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Cc: Liam Girdwood <lrg@slimlogic.co.uk> Cc: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
* | | Fix some regulator documentationLinus Walleij2009-09-22
| |/ |/| | | | | | | | | | | | | | | This fixes a spelling error and an API function signature mismatch in the regulator documentation. Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
* | PM: Introduce core framework for run-time PM of I/O devices (rev. 17)Rafael J. Wysocki2009-08-22
|/ | | | | | | | | | | | | | | 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 <rjw@sisk.pl> Acked-by: Magnus Damm <damm@igel.co.jp>
* Merge branch 'for-linus' of ↵Linus Torvalds2009-06-14
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (31 commits) trivial: remove the trivial patch monkey's name from SubmittingPatches trivial: Fix a typo in comment of addrconf_dad_start() trivial: usb: fix missing space typo in doc trivial: pci hotplug: adding __init/__exit macros to sgi_hotplug trivial: Remove the hyphen from git commands trivial: fix ETIMEOUT -> ETIMEDOUT typos trivial: Kconfig: .ko is normally not included in module names trivial: SubmittingPatches: fix typo trivial: Documentation/dell_rbu.txt: fix typos trivial: Fix Pavel's address in MAINTAINERS trivial: ftrace:fix description of trace directory trivial: unnecessary (void*) cast removal in sound/oss/msnd.c trivial: input/misc: Fix typo in Kconfig trivial: fix grammo in bus_for_each_dev() kerneldoc trivial: rbtree.txt: fix rb_entry() parameters in sample code trivial: spelling fix in ppc code comments trivial: fix typo in bio_alloc kernel doc trivial: Documentation/rbtree.txt: cleanup kerneldoc of rbtree.txt trivial: Miscellaneous documentation typo fixes trivial: fix typo milisecond/millisecond for documentation and source comments. ...
| * trivial: Miscellaneous documentation typo fixesMatt LaPlante2009-06-12
| | | | | | | | | | | | | | Fix various typos in documentation txts. Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* | PM: Remove bus_type suspend_late()/resume_early() V2Magnus Damm2009-06-12
|/ | | | | | | | | | | | Remove the ->suspend_late() and ->resume_early() callbacks from struct bus_type V2. These callbacks are legacy stuff at this point and since there seem to be no in-tree users we may as well remove them. New users should use dev_pm_ops. Signed-off-by: Magnus Damm <damm@igel.co.jp> Acked-by: Pavel Machek <pavel@ucw.cz> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
* pm: document use of RTC in pm_traceFrans Pop2008-10-16
| | | | | | | | | | | As pm_trace uses the system's hardware clock to save its magic value, users of that option should be warned that using this debug option will result in an incorrect system time after resume. Signed-off-by: Frans Pop <elendil@planet.nl> Acked-by: Pavel Machek <pavel@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* regulator: core - Rework machine API to remove string based functions.Liam Girdwood2008-10-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
* pm_qos: spelling fixesRichard Hughes2008-08-05
| | | | | | | | | | A documentation cleanup patch. With a minor tweak to clarify units for kbs. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: mark gross <mgross@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'reg-for-linus' of ↵Linus Torvalds2008-08-01
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6 * 'reg-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6: regulator: TI bq24022 Li-Ion Charger driver regulator: maintainers - add maintainers for regulator framework. regulator: documentation - ABI regulator: documentation - machine regulator: documentation - regulator driver regulator: documentation - consumer interface regulator: documentation - overview regulator: core kbuild files regulator: regulator test harness regulator: add support for fixed regulators. regulator: regulator framework core regulator: fixed regulator interface regulator: machine driver interface regulator: regulator driver interface regulator: consumer device interface
| * regulator: documentation - machineLiam Girdwood2008-07-30
| | | | | | | | | | | | This adds documenation describing the regulator machine interface. Signed-off-by: Liam Girdwood <lg@opensource.wolfsonmicro.com>
| * regulator: documentation - regulator driverLiam Girdwood2008-07-30
| | | | | | | | | | | | This adds documentation describing the regulator driver interface. Signed-off-by: Liam Girdwood <lg@opensource.wolfsonmicro.com>
| * regulator: documentation - consumer interfaceLiam Girdwood2008-07-30
| | | | | | | | | | | | This adds documentation describing the consumer device interface. Signed-off-by: Liam Girdwood <lg@opensource.wolfsonmicro.com>
| * regulator: documentation - overviewLiam Girdwood2008-07-30
| | | | | | | | | | | | | | This adds overview documentation describing the regulator framework and nomenclature used in the interface specific documentation and code. Signed-off-by: Liam Girdwood <lg@opensource.wolfsonmicro.com>
* | Merge branch 'master' of /home/cbou/linux-2.6Anton Vorontsov2008-07-29
|\| | | | | | | | | | | | | Conflicts: drivers/power/Kconfig drivers/power/Makefile
| * pm: remove obsolete piece of PM documentationRafael J. Wysocki2008-07-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remove some obsolete PM documentation. The majority of contents of Documentation/power/pm.txt are outdated. Remove the outdated parts of this file and move the rest to Documentation/power/apm-acpi.txt . Update the index in Documentation/power/ as appropriate. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | power_supply: add CHARGE_COUNTER property and olpc_battery support for itAndres Salomon2008-05-13
|/ | | | | | | | | | | | | This adds PROP_CHARGE_COUNTER to the power supply class (documenting it as well). The OLPC battery driver uses this for spitting out its ACR values (in uAh). We have some rounding errors (the data sheet claims 416.7, the math actually works out to 416.666667, so we're forced to choose between overflows or precision loss. I chose precision loss, and stuck w/ data sheet values), but I don't think anyone will care that much. Signed-off-by: Andres Salomon <dilinger@debian.org> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
* PM: Handle device registrations during suspend/resumeRafael J. Wysocki2008-04-19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Modify the PM core to protect its data structures, specifically the dpm_active list, from being corrupted if a child of the currently suspending device is registered concurrently with its ->suspend() callback. In that case, since the new device (the child) is added to dpm_active after its parent, the PM core will attempt to suspend it after the parent, which is wrong. Introduce a new member of struct dev_pm_info, called 'sleeping', and use it to check if the parent of the device being added to dpm_active has been suspended, in which case the device registration fails. Also, use 'sleeping' for checking if the ordering of devices on dpm_active is correct. Introduce variable 'all_sleeping' that will be set to 'true' once all devices have been suspended and make new device registrations fail until 'all_sleeping' is reset to 'false', in order to avoid having unsuspended devices around while the system is going into a sleep state. Remove pm_sleep_rwsem which is not necessary any more. Special thanks to Alan Stern for discussions and suggestions that lead to the creation of this patch. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* documentation: Move power-related files to Documentation/power/Randy Dunlap2008-03-12
| | | | | | | | | | | | Move 00-INDEX entries to power/00-INDEX (and add entry for pm_qos_interface.txt). Update references to moved filenames. Fix some trailing whitespace. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Len Brown <len.brown@intel.com>
* PM: Introduce PM_EVENT_HIBERNATE callback stateRafael J. Wysocki2008-02-23
| | | | | | | | | | | | | | | | | | | | | | | | | During the last step of hibernation in the "platform" mode (with the help of ACPI) we use the suspend code, including the devices' ->suspend() methods, to prepare the system for entering the ACPI S4 system sleep state. But at least for some devices the operations performed by the ->suspend() callback in that case must be different from its operations during regular suspend. For this reason, introduce the new PM event type PM_EVENT_HIBERNATE and pass it to the device drivers' ->suspend() methods during the last phase of hibernation, so that they can distinguish this case and handle it as appropriate. Modify the drivers that handle PM_EVENT_SUSPEND in a special way and need to handle PM_EVENT_HIBERNATE in the same way. These changes are necessary to fix a hibernation regression related to the i915 driver (ref. http://lkml.org/lkml/2008/2/22/488). Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Tested-by: Jeff Chua <jeff.chua.linux@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* PM: documentation cleanupsPavel Machek2008-02-07
| | | | | | Signed-off-by: Pavel Machek <pavel@suse.cz> Acked-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Len Brown <len.brown@intel.com>
* PM: Remove obsolete /sys/devices/.../power/state docsDavid Brownell2008-02-01
| | | | | | | | | | | | | The /sys/devices/.../power/state files have been gone for a while now, but I just noticed some documentation that still refers to them. (Fortunately described as DEPRECATED and WILL REMOVE). Time to remove that obsolete documentation too ... Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Len Brown <len.brown@intel.com>
* PM: Suspend/hibernation debug documentation update (rev. 2)Rafael J. Wysocki2008-02-01
| | | | | | | | | Update the suspend/hibernation debugging and testing documentation to describe the newly introduced testing facilities. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Len Brown <len.brown@intel.com>
* Hibernation: Add PM_RESTORE_PREPARE and PM_POST_RESTORE notifiers (rev. 2)Alan Stern2008-02-01
| | | | | | | | | | | Add PM_RESTORE_PREPARE and PM_POST_RESTORE notifiers to the PM core, to be used in analogy with the existing PM_HIBERNATION_PREPARE and PM_POST_HIBERNATION notifiers. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: "Rafael J. Wysocki" <rjw@sisk.pl> Signed-off-by: Len Brown <len.brown@intel.com>
* Hibernation: Introduce exportable suspend ioctls header (rev. 2)Rafael J. Wysocki2008-02-01
| | | | | | | | | Move the definitions of hibernation ioctls to a separate header file in include/linux, which can be exported to the user space. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Len Brown <len.brown@intel.com>
* Hibernation: Correct definitions of some ioctls (rev. 2)Rafael J. Wysocki2008-02-01
| | | | | | | | | | | Three ioctl numbers belonging to the hibernation userland interface, SNAPSHOT_ATOMIC_SNAPSHOT, SNAPSHOT_AVAIL_SWAP, SNAPSHOT_GET_SWAP_PAGE, are defined in a wrong way (eg. not portable). Provide new ioctl numbers for these ioctls and mark the existing ones as deprecated. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Len Brown <len.brown@intel.com>
* Hibernation: Mark SNAPSHOT_SET_SWAP_FILE ioctl as deprecated (rev. 2)Rafael J. Wysocki2008-02-01
| | | | | | | | | Mark the SNAPSHOT_SET_SWAP_FILE ioctl belonging to the hibernation userland interface as deprecated. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Len Brown <len.brown@intel.com>
* Hibernation: Rework platform support ioctls (rev. 2)Rafael J. Wysocki2008-02-01
| | | | | | | | | | | | | | | Modify the hibernation userland interface by adding two new ioctls to it, SNAPSHOT_PLATFORM_SUPPORT and SNAPSHOT_POWER_OFF, that can be used, respectively, to switch the hibernation platform support on/off and to make the kernel transition the system to the hibernation state (eg. ACPI S4) using the platform (eg. ACPI) driver. These ioctls are intended to replace the misdesigned SNAPSHOT_PMOPS ioctl, which from now is regarded as obsolete and will be removed in the future. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Len Brown <len.brown@intel.com>
* Hibernation: Introduce SNAPSHOT_GET_IMAGE_SIZE ioctlRafael J. Wysocki2008-02-01
| | | | | | | | | | | | | Add a new ioctl, SNAPSHOT_GET_IMAGE_SIZE, returning the size of the (just created) hibernation image, to the hibernation userland interface. This ioctl is necessary so that the userland utilities using the interface need not access the hibernation image header, owned by the kernel, in order to obtain the size of the image. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Len Brown <len.brown@intel.com>
* typo fixesMatt LaPlante2007-10-19
| | | | | | | | | | | | Most of these fixes were already submitted for old kernel versions, and were approved, but for some reason they never made it into the releases. Because this is a consolidation of a couple old missed patches, it touches both Kconfigs and documentation texts. Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Adrian Bunk <bunk@kernel.org>
* serial: turn serial console suspend a boot rather than compile time optionAndres Salomon2007-10-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, there's a CONFIG_DISABLE_CONSOLE_SUSPEND that allows one to stop the serial console from being suspended when the rest of the machine goes to sleep. This is incredibly useful for debugging power management-related things; however, having it as a compile-time option has proved to be incredibly inconvenient for us (OLPC). There are plenty of times that we want serial console to not suspend, but for the most part we'd like serial console to be suspended. This drops CONFIG_DISABLE_CONSOLE_SUSPEND, and replaces it with a kernel boot parameter (no_console_suspend). By default, the serial console will be suspended along with the rest of the system; by passing 'no_console_suspend' to the kernel during boot, serial console will remain alive during suspend. For now, this is pretty serial console specific; further fixes could be applied to make this work for things like netconsole. Signed-off-by: Andres Salomon <dilinger@debian.org> Acked-by: "Rafael J. Wysocki" <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Cc: Nigel Cunningham <nigel@suspend2.net> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* freezer: do not send signals to kernel threadsRafael J. Wysocki2007-10-18
| | | | | | | | | | | | | | | | | | The freezer should not send signals to kernel threads, since that may lead to subtle problems. In particular, commit b74d0deb968e1f85942f17080eace015ce3c332c has changed recalc_sigpending_tsk() so that it doesn't clear TIF_SIGPENDING. For this reason, if the freezer continues to send fake signals to kernel threads and the freezing of kernel threads fails, some of them may be running with TIF_SIGPENDING set forever. Accordingly, recalc_sigpending_tsk() shouldn't set the task's TIF_SIGPENDING flag if TIF_FREEZE is set. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Cc: Nigel Cunningham <nigel@nigel.suspend2.net> Cc: Pavel Machek <pavel@ucw.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* freezer: document relationship with memory shrinkingRafael J. Wysocki2007-10-18
| | | | | | | | | | | | One important reason to freeze tasks, which is that we don't want them to allocate memory after freeing it for the hibernation image, has not been documented. Fix it. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Acked-by: Nigel Cunningham <nigel@nigel.suspend2.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* PM: Rename struct pm_ops and related thingsRafael J. Wysocki2007-10-18
| | | | | | | | | | | | | | | | The name of 'struct pm_ops' suggests that it is related to the power management in general, but in fact it is only related to suspend.  Moreover, its name should indicate what this structure is used for, so it seems reasonable to change it to 'struct platform_suspend_ops'.  In that case, the name of the global variable of this type used by the PM core and the names of related functions should be changed accordingly. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Cc: Len Brown <lenb@kernel.org> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Add Documentation/power/00-INDEXRob Landley2007-10-17
| | | | | | | | Add Documentation/power/00-INDEX Signed-off-by: Rob Landley <rob@landley.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Fix wrong filename reference in drivers-testing.txtRalf Baechle2007-10-17
| | | | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Documentation:reference notifiers.txt in freezing-of-tasks.txtOliver Neukum2007-07-21
| | | | | | | | | | | freezing-of-tasks.txt mentions firmware issues without mentioning the use of the new notifier API to overcome them. Here's an update. Signed-off-by: Oliver Neukum <oneukum@suse.de> Acked-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Nigel Cunningham <nigel@nigel.suspend2.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* PM: introduce hibernation and suspend notifiersRafael J. Wysocki2007-07-19
| | | | | | | | | | | | | | | Make it possible to register hibernation and suspend notifiers, so that subsystems can perform hibernation-related or suspend-related operations that should not be carried out by device drivers' .suspend() and .resume() routines. [akpm@linux-foundation.org: build fixes] [akpm@linux-foundation.org: cleanups] Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Cc: Nigel Cunningham <nigel@nigel.suspend2.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Freezer: make kernel threads nonfreezable by defaultRafael J. Wysocki2007-07-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, the freezer treats all tasks as freezable, except for the kernel threads that explicitly set the PF_NOFREEZE flag for themselves. This approach is problematic, since it requires every kernel thread to either set PF_NOFREEZE explicitly, or call try_to_freeze(), even if it doesn't care for the freezing of tasks at all. It seems better to only require the kernel threads that want to or need to be frozen to use some freezer-related code and to remove any freezer-related code from the other (nonfreezable) kernel threads, which is done in this patch. The patch causes all kernel threads to be nonfreezable by default (ie. to have PF_NOFREEZE set by default) and introduces the set_freezable() function that should be called by the freezable kernel threads in order to unset PF_NOFREEZE. It also makes all of the currently freezable kernel threads call set_freezable(), so it shouldn't cause any (intentional) change of behaviour to appear. Additionally, it updates documentation to describe the freezing of tasks more accurately. [akpm@linux-foundation.org: build fixes] Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Nigel Cunningham <nigel@nigel.suspend2.net> Cc: Pavel Machek <pavel@ucw.cz> Cc: Oleg Nesterov <oleg@tv-sign.ru> Cc: Gautham R Shenoy <ego@in.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* USB: add USB-Persist facilityAlan Stern2007-07-12
| | | | | | | | | | | | | | | | | This patch (as886) adds the controversial USB-persist facility, allowing USB devices to persist across a power loss during system suspend. The facility is controlled by a new Kconfig option (with appropriate warnings about the potential dangers); when the option is off the behavior will remain the same as it is now. But when the option is on, people will be able to use suspend-to-disk and keep their USB filesystems intact -- something particularly valuable for small machines where the root filesystem is on a USB device! Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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