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* Merge tag 'hwmon-for-linus' of ↵Linus Torvalds2012-05-2313-347/+902
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging Pull hwmon updates from Guenter Roeck: "New driver for INA219 and INA226, added support for IT8782F and IT8783E/F to it87 driver, plus cleanups in a couple of drivers." * tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging: hwmon: (it87) Make temp3 attribute conditional for IT8782F hwmon: (it87) Convert to use devm_kzalloc and devm_request_region hwmon: INA219 and INA226 support hwmon: (it87) Create voltage attributes only if voltage is enabled hwmon: (ntc_thermistor) Fix checkpatch warning hwmon: (ntc_thermistor) Optimize and fix build warning hwmon: (ntc_thermistor) Return error code from hwmon_device_register hwmon: (ntc_thermistor) Convert to devm_kzalloc hwmon: (ad7314) Remove unused defines, and rename OFFSET to SHIFT acpi_power_meter: clean up code around setup_attrs acpi_power_meter: drop meter_rw_attrs, use common meter_attrs acpi_power_meter: remove duplicate code between register_{ro,rw}_attrs acpi_power_meter: use a {RW,RO}_SENSOR_TEMPLATE macro to clean things up acpi_power_meter: use the same struct {rw,ro}_sensor_template for both hwmon: use module_pci_driver hwmon: (it87) Add support for IT8782F and IT8783E/F
| * hwmon: (it87) Make temp3 attribute conditional for IT8782FGuenter Roeck2012-05-221-20/+61
| | | | | | | | | | | | | | On IT8782F, temp3 is only supported if UART6 is disabled. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Jean Delvare <khali@linux-fr.org>
| * hwmon: (it87) Convert to use devm_kzalloc and devm_request_regionGuenter Roeck2012-05-221-34/+20
| | | | | | | | | | | | | | This makes the code a bit simpler and smaller. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Jean Delvare <khali@linux-fr.org>
| * hwmon: INA219 and INA226 supportFelten, Lothar2012-05-225-0/+430
| | | | | | | | | | | | | | | | | | Add support for the Texas Instruments INA219 and INA226 power monitors. Signed-off-by: Lothar Felten <l-felten@ti.com> [guenter.roeck@ericsson.com: formatting cleanup; check for smbus word data; select PGA=8 for INA219] Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
| * hwmon: (it87) Create voltage attributes only if voltage is enabledGuenter Roeck2012-05-211-38/+124
| | | | | | | | | | | | | | | | On IT8782F and IT8783F, some voltage input pins may be disabled. Don't create sysfs attribute files if that is the case. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Jean Delvare <khali@linux-fr.org>
| * hwmon: (ntc_thermistor) Fix checkpatch warningGuenter Roeck2012-05-211-6/+6
| | | | | | | | | | | | | | Fix checkpatch WARNING: quoted string split across lines Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com> Reviewed-by: Robert Coulson <robert.coulson@ericsson.com>
| * hwmon: (ntc_thermistor) Optimize and fix build warningGuenter Roeck2012-05-211-84/+80
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The following build warning is seen in some configurations: drivers/hwmon/ntc_thermistor.c: In function 'ntc_show_temp': drivers/hwmon/ntc_thermistor.c:293: warning: 'temp' may be used uninitialized in this function Fix the problem by re-arranging the code to overload return values with error codes, and by avoiding error returns whenever possible. Specifically, Simplify lookup_comp() to not return an error. Instead, return i_low == i_high if there is an exact match, or if the ohm value is outside the lookup table range. Modify get_temp_mC() to not return an error. Since it only returns an error after lookup_comp() returned an error, this is quite straightforward after above change. Separate ntc_thermistor_read() into a function to read the resistor value (which can return an error), and the call to get_temp_mC() which doesn't. Call the functions directly from ntc_show_temp(). Code was tested using a test program, comparing the result of the old and new versions of get_temp_mC() for resistor values between 0 and 2,000,000 ohm. As a side effect, this patch reduces code size by approximately 400 bytes on x86_64. Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com> Cc: Donggeun Kim <dg77.kim@samsung.com> Reviewed-by: Robert Coulson <robert.coulson@ericsson.com>
| * hwmon: (ntc_thermistor) Return error code from hwmon_device_registerGuenter Roeck2012-05-211-2/+2
| | | | | | | | | | | | | | | | hwmon_device_register() never returns a NULL pointer in case of errors, but an error value. Use it. Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com> Reviewed-by: Robert Coulson <robert.coulson@ericsson.com>
| * hwmon: (ntc_thermistor) Convert to devm_kzallocGuenter Roeck2012-05-211-8/+3
| | | | | | | | | | | | | | This avoids memory leaks, and makes the code a bit simpler and smaller. Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com> Reviewed-by: Robert Coulson <robert.coulson@ericsson.com>
| * hwmon: (ad7314) Remove unused defines, and rename OFFSET to SHIFTGuenter Roeck2012-05-211-9/+2
| | | | | | | | | | | | | | | | | | Remove unused defines AD7314_PD, AD7314_TEMP_SIGN, and ADT7301_TEMP_SIGN. Rename AD7314_TEMP_OFFSET to the more appropriate AD7314_TEMP_SHIFT. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Cc: Jonathan Cameron <jic23@cam.ac.uk> Acked-by: Jean Delvare <khali@linux-fr.org>
| * acpi_power_meter: clean up code around setup_attrsKyle McMartin2012-05-211-8/+7
| | | | | | | | | | | | | | | | We don't need to duplicate if (res) checks if we're always running one or the other. Signed-off-by: Kyle McMartin <kyle@redhat.com> Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
| * acpi_power_meter: drop meter_rw_attrs, use common meter_attrsKyle McMartin2012-05-211-9/+2
| | | | | | | | | | | | | | | | | | We always register these two together, so move meter_rw_attrs into meter_ro_attrs and use the same for both since we no longer have two register_attr paths. Signed-off-by: Kyle McMartin <kyle@redhat.com> Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
| * acpi_power_meter: remove duplicate code between register_{ro,rw}_attrsKyle McMartin2012-05-211-42/+17
| | | | | | | | | | | | | | | | Key off the attr->set method being present to set the sysfs attribute as writable. Signed-off-by: Kyle McMartin <kyle@redhat.com> Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
| * acpi_power_meter: use a {RW,RO}_SENSOR_TEMPLATE macro to clean things upKyle McMartin2012-05-211-93/+37
| | | | | | | | | | | | | | Similar to how we do PCI/USB device id structs. Signed-off-by: Kyle McMartin <kyle@redhat.com> Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
| * acpi_power_meter: use the same struct {rw,ro}_sensor_template for bothKyle McMartin2012-05-211-43/+110
| | | | | | | | | | | | | | | | We don't need both, when we can just key the read/write off of the presence of the .set member. Signed-off-by: Kyle McMartin <kyle@redhat.com> Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
| * hwmon: use module_pci_driverAxel Lin2012-05-213-36/+3
| | | | | | | | | | | | | | | | | | | | | | This patch converts the drivers in drivers/hwmon/* to use module_pci_driver() macro which makes the code smaller and a bit simpler. Signed-off-by: Axel Lin <axel.lin@gmail.com> Cc: Andreas Herrmann <andreas.herrmann3@amd.com> Cc: Clemens Ladisch <clemens@ladisch.de> Cc: Rudolf Marek <r.marek@assembler.cz> Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
| * hwmon: (it87) Add support for IT8782F and IT8783E/FGuenter Roeck2012-05-212-35/+118
| | | | | | | | | | Signed-off-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Jean Delvare <khali@linux-fr.org>
* | Merge tag 'pm-for-3.5' of ↵Linus Torvalds2012-05-2330-320/+1359
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull power management updates from Rafael Wysocki: - Implementation of opportunistic suspend (autosleep) and user space interface for manipulating wakeup sources. - Hibernate updates from Bojan Smojver and Minho Ban. - Updates of the runtime PM core and generic PM domains framework related to PM QoS. - Assorted fixes. * tag 'pm-for-3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (25 commits) epoll: Fix user space breakage related to EPOLLWAKEUP PM / Domains: Make it possible to add devices to inactive domains PM / Hibernate: Use get_gendisk to verify partition if resume_file is integer format PM / Domains: Fix computation of maximum domain off time PM / Domains: Fix link checking when add subdomain PM / Sleep: User space wakeup sources garbage collector Kconfig option PM / Sleep: Make the limit of user space wakeup sources configurable PM / Documentation: suspend-and-cpuhotplug.txt: Fix typo PM / Domains: Cache device stop and domain power off governor results, v3 PM / Domains: Make device removal more straightforward PM / Sleep: Fix a mistake in a conditional in autosleep_store() epoll: Add a flag, EPOLLWAKEUP, to prevent suspend while epoll events are ready PM / QoS: Create device constraints objects on notifier registration PM / Runtime: Remove device fields related to suspend time, v2 PM / Domains: Rework default domain power off governor function, v2 PM / Domains: Rework default device stop governor function, v2 PM / Sleep: Add user space interface for manipulating wakeup sources, v3 PM / Sleep: Add "prevent autosleep time" statistics to wakeup sources PM / Sleep: Implement opportunistic sleep, v2 PM / Sleep: Add wakeup_source_activate and wakeup_source_deactivate tracepoints ...
| * \ Merge branch 'pm-sleep'Rafael J. Wysocki2012-05-221-1/+1
| |\ \ | | | | | | | | | | | | | | | | * pm-sleep: epoll: Fix user space breakage related to EPOLLWAKEUP
| | * | epoll: Fix user space breakage related to EPOLLWAKEUPRafael J. Wysocki2012-05-221-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 4d7e30d (epoll: Add a flag, EPOLLWAKEUP, to prevent suspend while epoll events are ready) caused some applications to malfunction, because they set the bit corresponding to the new EPOLLWAKEUP flag in their eventpoll flags and they don't have the new CAP_EPOLLWAKEUP capability. To prevent that from happening, change epoll_ctl() to clear EPOLLWAKEUP in epds.events if the caller doesn't have the CAP_EPOLLWAKEUP capability instead of failing and returning an error code, which allows the affected applications to function normally. Reported-and-tested-by: Jiri Slaby <jslaby@suse.cz> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
| * | | Merge branch 'pm-sleep'Rafael J. Wysocki2012-05-182-0/+15
| |\| | | | | | | | | | | | | | | | | | * pm-sleep: PM / Hibernate: Use get_gendisk to verify partition if resume_file is integer format
| | * | PM / Hibernate: Use get_gendisk to verify partition if resume_file is ↵Minho Ban2012-05-182-0/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | integer format Sometimes resume= parameter comes in integer style (e.g. major:minor) and then name_to_dev_t can not detect partition properly. (especially async device like usb, mmc). This patch calls get_gendisk() if resumewait is true and resume_file is in integer format to work around this problem. Signed-off-by: Minho Ban <mhban@samsung.com> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
| * | | Merge branch 'pm-domains'Rafael J. Wysocki2012-05-182-6/+23
| |\ \ \ | | | | | | | | | | | | | | | | | | | | * pm-domains: PM / Domains: Make it possible to add devices to inactive domains
| | * | | PM / Domains: Make it possible to add devices to inactive domainsRafael J. Wysocki2012-05-182-6/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The generic PM domains core code currently requires domains to be in the "power on" state for adding devices to them, but this limitation turns out to be inconvenient in some situations, so remove it. For this purpose, make __pm_genpd_add_device() set the device's need_restore flag if the domain is in the "power off" state, so that the device's "restore state" (usually .runtime_resume()) callback is executed when it is resumed after the domain has been turned on. If the domain is in the "power on" state, the device's need_restore flag will be cleared by __pm_genpd_add_device(), so that its "save state" (usually .runtime_suspend()) callback is executed when the domain is about to be turned off. However, since that default behavior need not be always desirable, add a helper function pm_genpd_dev_need_restore() allowing a device's need_restore flag to be set/unset at any time. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
| * | | | Merge branch 'pm-sleep'Rafael J. Wysocki2012-05-1119-118/+1050
| |\ \ \ \ | | | |/ / | | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * pm-sleep: PM / Sleep: User space wakeup sources garbage collector Kconfig option PM / Sleep: Make the limit of user space wakeup sources configurable PM / Documentation: suspend-and-cpuhotplug.txt: Fix typo PM / Sleep: Fix a mistake in a conditional in autosleep_store() epoll: Add a flag, EPOLLWAKEUP, to prevent suspend while epoll events are ready PM / Sleep: Add user space interface for manipulating wakeup sources, v3 PM / Sleep: Add "prevent autosleep time" statistics to wakeup sources PM / Sleep: Implement opportunistic sleep, v2 PM / Sleep: Add wakeup_source_activate and wakeup_source_deactivate tracepoints PM / Sleep: Change wakeup source statistics to follow Android PM / Sleep: Use wait queue to signal "no wakeup events in progress" PM / Sleep: Look for wakeup events in later stages of device suspend PM / Hibernate: Hibernate/thaw fixes/improvements
| | * | | PM / Sleep: User space wakeup sources garbage collector Kconfig optionRafael J. Wysocki2012-05-112-39/+67
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make it possible to configure out the user space wakeup sources garbage collector for debugging and default Android builds. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Arve Hjønnevåg <arve@android.com>
| | * | | PM / Sleep: Make the limit of user space wakeup sources configurableRafael J. Wysocki2012-05-112-5/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make it possible to configure out the check against the limit of user space wakeup sources for debugging and default Android builds. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Arve Hjønnevåg <arve@android.com>
| | * | | PM / Documentation: suspend-and-cpuhotplug.txt: Fix typoMarcos Paulo de Souza2012-05-051-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | sysfs was expected in this context. Signed-off-by: Marcos Paulo de Souza <marcos.souza.org@gmail.com> Acked-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
| | * | | PM / Sleep: Fix a mistake in a conditional in autosleep_store()Arve Hjønnevåg2012-05-051-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The condition check in autosleep_store() is incorrect and prevents /sys/power/autosleep from working as advertised. Fix that. [rjw: Added the changelog.] Signed-off-by: Arve Hjønnevåg <arve@android.com> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
| | * | | epoll: Add a flag, EPOLLWAKEUP, to prevent suspend while epoll events are readyArve Hjønnevåg2012-05-053-4/+103
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When an epoll_event, that has the EPOLLWAKEUP flag set, is ready, a wakeup_source will be active to prevent suspend. This can be used to handle wakeup events from a driver that support poll, e.g. input, if that driver wakes up the waitqueue passed to epoll before allowing suspend. Signed-off-by: Arve Hjønnevåg <arve@android.com> Reviewed-by: NeilBrown <neilb@suse.de> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
| | * | | PM / Sleep: Add user space interface for manipulating wakeup sources, v3Rafael J. Wysocki2012-05-017-0/+317
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Android allows user space to manipulate wakelocks using two sysfs file located in /sys/power/, wake_lock and wake_unlock. Writing a wakelock name and optionally a timeout to the wake_lock file causes the wakelock whose name was written to be acquired (it is created before is necessary), optionally with the given timeout. Writing the name of a wakelock to wake_unlock causes that wakelock to be released. Implement an analogous interface for user space using wakeup sources. Add the /sys/power/wake_lock and /sys/power/wake_unlock files allowing user space to create, activate and deactivate wakeup sources, such that writing a name and optionally a timeout to wake_lock causes the wakeup source of that name to be activated, optionally with the given timeout. If that wakeup source doesn't exist, it will be created and then activated. Writing a name to wake_unlock causes the wakeup source of that name, if there is one, to be deactivated. Wakeup sources created with the help of wake_lock that haven't been used for more than 5 minutes are garbage collected and destroyed. Moreover, there can be only WL_NUMBER_LIMIT wakeup sources created with the help of wake_lock present at a time. The data type used to track wakeup sources created by user space is called "struct wakelock" to indicate the origins of this feature. This version of the patch includes an rbtree manipulation fix from John Stultz. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: NeilBrown <neilb@suse.de>
| | * | | PM / Sleep: Add "prevent autosleep time" statistics to wakeup sourcesRafael J. Wysocki2012-05-016-5/+102
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Android uses one wakelock statistics that is only necessary for opportunistic sleep. Namely, the prevent_suspend_time field accumulates the total time the given wakelock has been locked while "automatic suspend" was enabled. Add an analogous field, prevent_sleep_time, to wakeup sources and make it behave in a similar way. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| | * | | PM / Sleep: Implement opportunistic sleep, v2Rafael J. Wysocki2012-05-018-35/+298
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Introduce a mechanism by which the kernel can trigger global transitions to a sleep state chosen by user space if there are no active wakeup sources. It consists of a new sysfs attribute, /sys/power/autosleep, that can be written one of the strings returned by reads from /sys/power/state, an ordered workqueue and a work item carrying out the "suspend" operations. If a string representing the system's sleep state is written to /sys/power/autosleep, the work item triggering transitions to that state is queued up and it requeues itself after every execution until user space writes "off" to /sys/power/autosleep. That work item enables the detection of wakeup events using the functions already defined in drivers/base/power/wakeup.c (with one small modification) and calls either pm_suspend(), or hibernate() to put the system into a sleep state. If a wakeup event is reported while the transition is in progress, it will abort the transition and the "system suspend" work item will be queued up again. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: NeilBrown <neilb@suse.de>
| | * | | PM / Sleep: Add wakeup_source_activate and wakeup_source_deactivate tracepointsArve Hjønnevåg2012-05-012-3/+43
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add tracepoints to wakeup_source_activate and wakeup_source_deactivate. Useful for checking that specific wakeup sources overlap as expected. Signed-off-by: Arve Hjønnevåg <arve@android.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
| | * | | PM / Sleep: Change wakeup source statistics to follow AndroidRafael J. Wysocki2012-05-014-52/+77
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Wakeup statistics used by Android are slightly different from what we have in wakeup sources at the moment and there aren't any known users of those statistics other than Android, so modify them to make it easier for Android to switch to wakeup sources. This removes the struct wakeup_source's hit_cout field, which is very rough and therefore not very useful, and adds two new fields, wakeup_count and expire_count. The first one tracks how many times the wakeup source is activated with events_check_enabled set (which roughly corresponds to the situations when a system power transition to a sleep state is in progress and would be aborted by this wakeup source if it were the only active one at that time) and the second one is the number of times the wakeup source has been activated with a timeout that expired. Additionally, the last_time field is now updated when the wakeup source is deactivated too (previously it was only updated during the wakeup source's activation), which seems to be what Android does with the analogous counter for wakelocks. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| | * | | PM / Sleep: Use wait queue to signal "no wakeup events in progress"Rafael J. Wysocki2012-05-011-3/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current wakeup source deactivation code doesn't do anything when the counter of wakeup events in progress goes down to zero, which requires pm_get_wakeup_count() to poll that counter periodically. Although this reduces the average time it takes to deactivate a wakeup source, it also may lead to a substantial amount of unnecessary polling if there are extended periods of wakeup activity. Thus it seems reasonable to use a wait queue for signaling the "no wakeup events in progress" condition and remove the polling. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: mark gross <markgross@thegnar.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| | * | | PM / Sleep: Look for wakeup events in later stages of device suspendRafael J. Wysocki2012-05-011-0/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, the device suspend code in drivers/base/power/main.c only checks if there have been any wakeup events, and therefore the ongoing system transition to a sleep state should be aborted, during the first (i.e. "suspend") device suspend phase. However, wakeup events may be reported later as well, so it's reasonable to look for them in the in the subsequent (i.e. "late suspend" and "suspend noirq") phases. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| | * | | PM / Hibernate: Hibernate/thaw fixes/improvementsBojan Smojver2012-05-011-23/+39
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 1. Do not allocate memory for buffers from emergency pools, unless absolutely required. Do not warn about and do not retry non-essential failed allocations. 2. Do not check the amount of free pages left on every single page write, but wait until one map is completely populated and then check. 3. Set maximum number of pages for read buffering consistently, instead of inadvertently depending on the size of the sector type. 4. Fix copyright line, which I missed when I submitted the hibernation threading patch. 5. Dispense with bit shifting arithmetic to improve readability. 6. Really recalculate the number of pages required to be free after all allocations have been done. 7. Fix calculation of pages required for read buffering. Only count in pages that do not belong to high memory. Signed-off-by: Bojan Smojver <bojan@rexursive.com> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
| * | | | Merge branch 'pm-domains'Rafael J. Wysocki2012-05-117-197/+258
| |\ \ \ \ | | | |/ / | | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * pm-domains: PM / Domains: Fix computation of maximum domain off time PM / Domains: Fix link checking when add subdomain PM / Domains: Cache device stop and domain power off governor results, v3 PM / Domains: Make device removal more straightforward PM / QoS: Create device constraints objects on notifier registration PM / Runtime: Remove device fields related to suspend time, v2 PM / Domains: Rework default domain power off governor function, v2 PM / Domains: Rework default device stop governor function, v2
| | * | | PM / Domains: Fix computation of maximum domain off timeRafael J. Wysocki2012-05-111-11/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The default domain power off governor function for generic PM domains, default_power_down_ok(), may violate subdomain maximum off time limit by allowing the master domain to be off for too long. Namely, it only finds the minium of all device maximum off times over the domain's devices and uses that to compute the domain's maximum off time, but it should do the same for the subdomains. Fix this problem by modifying default_power_down_ok() to compute the given domain's maximum off time as the difference between the minimum off time over all devices and subdomains in the domain and its power on latency. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
| | * | | PM / Domains: Fix link checking when add subdomainHuang Ying2012-05-111-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Current pm_genpd_add_subdomain() will allow duplicated link between master and slave domain. This patch fixed it. Because when current pm_genpd_add_subdomain() checks whether the link between the master and slave generic PM domain already exists, slave_links instead of master_links of master domain is used. Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
| | * | | PM / Domains: Cache device stop and domain power off governor results, v3Rafael J. Wysocki2012-05-053-19/+153
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The results of the default device stop and domain power off governor functions for generic PM domains, default_stop_ok() and default_power_down_ok(), depend only on the timing data of devices, which are static, and on their PM QoS constraints. Thus, in theory, these functions only need to carry out their computations, which may be time consuming in general, when it is known that the PM QoS constraint of at least one of the devices in question has changed. Use the PM QoS notifiers of devices to implement that. First, introduce new fields, constraint_changed and max_off_time_changed, into struct gpd_timing_data and struct generic_pm_domain, respectively, and register a PM QoS notifier function when adding a device into a domain that will set those fields to 'true' whenever the device's PM QoS constraint is modified. Second, make default_stop_ok() and default_power_down_ok() use those fields to decide whether or not to carry out their computations from scratch. The device and PM domain hierarchies are taken into account in that and the expense is that the changes of PM QoS constraints of suspended devices will not be taken into account immediately, which isn't guaranteed anyway in general. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
| | * | | PM / Domains: Make device removal more straightforwardRafael J. Wysocki2012-05-051-16/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The removal of a device from a PM domain doesn't have to browse the domain's device list, because it can check directly if the device belongs to the given domain. Moreover, it should clear the domain_data pointer in dev->power.subsys_data, because dev_pm_put_subsys_data(dev) may not remove dev->power.subsys_data and the stale domain data pointer may cause problems to happen. Rework pm_genpd_remove_device() taking the above observations into account. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
| | * | | PM / QoS: Create device constraints objects on notifier registrationRafael J. Wysocki2012-05-011-7/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current behavior of dev_pm_qos_add_notifier() makes device PM QoS notifiers less than useful. Namely, it silently returns success when called before any PM QoS constraints are added for the device, so the caller will assume that the notifier has been registered, but when someone actually adds some nontrivial constraints for the device eventually, the previous callers of dev_pm_qos_add_notifier() will not know about that and their notifier routines will not be executed (contrary to their expectations). To address this problem make dev_pm_qos_add_notifier() create the constraints object for the device if it is not present when the routine is called. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by : markgross <markgross@thegnar.org>
| | * | | PM / Runtime: Remove device fields related to suspend time, v2Rafael J. Wysocki2012-05-014-119/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | After the previous changes in default_stop_ok() and default_power_down_ok() for PM domains, there are two fields in struct dev_pm_info that aren't necessary any more, suspend_time and max_time_suspended_ns. Remove those fields along with all of the code that accesses them, which simplifies the runtime PM framework quite a bit. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
| | * | | PM / Domains: Rework default domain power off governor function, v2Rafael J. Wysocki2012-05-013-38/+35
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The existing default domain power down governor function for PM domains, default_power_down_ok(), is supposed to check whether or not the PM QoS latency constraints of the devices in the domain will be violated if the domain is turned off by pm_genpd_poweroff(). However, the computations carried out by it don't reflect the definition of the PM QoS latency constrait in Documentation/ABI/testing/sysfs-devices-power. Make default_power_down_ok() follow the definition of the PM QoS latency constrait. In particular, make it only take latencies into account, because it doesn't matter how much time has elapsed since the domain's devices were suspended for the computation. Remove the break_even_ns and power_off_time fields from struct generic_pm_domain, because they are not necessary any more. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
| | * | | PM / Domains: Rework default device stop governor function, v2Rafael J. Wysocki2012-05-013-5/+51
| | |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The existing default device stop governor function for PM domains, default_stop_ok(), is supposed to check whether or not the device's PM QoS latency constraint will be violated if the device is stopped by pm_genpd_runtime_suspend(). However, the computations carried out by it don't reflect the definition of the PM QoS latency constrait in Documentation/ABI/testing/sysfs-devices-power. Make default_stop_ok() follow the definition of the PM QoS latency constrait. In particular, make it take the device's start and stop latencies correctly. Add a new field, effective_constraint_ns, to struct gpd_timing_data and use it to store the difference between the device's PM QoS constraint and its resume latency for use by the device's parent (the effective_constraint_ns values for the children are used for computing the parent's one along with its PM QoS constraint). Remove the break_even_ns field from struct gpd_timing_data, because it's not used any more. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
| * | | Merge branch 'pm-devfreq'Rafael J. Wysocki2012-05-112-0/+14
| |\ \ \ | | | | | | | | | | | | | | | | | | | | * pm-devfreq: PM: devfreq: init performance/powersave governor
| | * | | PM: devfreq: init performance/powersave governorXiaoguang Chen2012-05-012-0/+14
| | |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Performance and powersave governor's get_target_freq is not called if driver chooses one of these two governors. Add init function in governor profile to call update_devfreq which will call get_target_freq subsequently. Signed-off-by: Xiaoguang Chen <chenxg@marvell.com> Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
* | | | Merge tag 'regmap-domain-deps' of ↵Linus Torvalds2012-05-232-3/+1
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap Pull a regmap kconfig dependency fix from Mark Brown: "Fix the dependency on IRQ_DOMAIN for REGMAP_IRQ in the core Fixes a missing select from the Palmas driver a bit more throoughly." * tag 'regmap-domain-deps' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap: regmap: Use select .. if to get IRQ_DOMAIN enabled
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 10:57:40 +0100