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2014-12-18Merge tag 'pm+acpi-3.19-rc1-2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull more ACPI and power management updates from Rafael Wysocki: "These are regression fixes (leds-gpio, ACPI backlight driver, operating performance points library, ACPI device enumeration messages, cpupower tool), other bug fixes (ACPI EC driver, ACPI device PM), some cleanups in the operating performance points (OPP) framework, continuation of CONFIG_PM_RUNTIME elimination, a couple of minor intel_pstate driver changes, a new MAINTAINERS entry for it and an ACPI fan driver change needed for better support of thermal management in user space. Specifics: - Fix a regression in leds-gpio introduced by a recent commit that inadvertently changed the name of one of the properties used by the driver (Fabio Estevam). - Fix a regression in the ACPI backlight driver introduced by a recent fix that missed one special case that had to be taken into account (Aaron Lu). - Drop the level of some new kernel messages from the ACPI core introduced by a recent commit to KERN_DEBUG which they should have used from the start and drop some other unuseful KERN_ERR messages printed by ACPI (Rafael J Wysocki). - Revert an incorrect commit modifying the cpupower tool (Prarit Bhargava). - Fix two regressions introduced by recent commits in the OPP library and clean up some existing minor issues in that code (Viresh Kumar). - Continue to replace CONFIG_PM_RUNTIME with CONFIG_PM throughout the tree (or drop it where that can be done) in order to make it possible to eliminate CONFIG_PM_RUNTIME (Rafael J Wysocki, Ulf Hansson, Ludovic Desroches). There will be one more "CONFIG_PM_RUNTIME removal" batch after this one, because some new uses of it have been introduced during the current merge window, but that should be sufficient to finally get rid of it. - Make the ACPI EC driver more robust against race conditions related to GPE handler installation failures (Lv Zheng). - Prevent the ACPI device PM core code from attempting to disable GPEs that it has not enabled which confuses ACPICA and makes it report errors unnecessarily (Rafael J Wysocki). - Add a "force" command line switch to the intel_pstate driver to make it possible to override the blacklisting of some systems in that driver if needed (Ethan Zhao). - Improve intel_pstate code documentation and add a MAINTAINERS entry for it (Kristen Carlson Accardi). - Make the ACPI fan driver create cooling device interfaces witn names that reflect the IDs of the ACPI device objects they are associated with, except for "generic" ACPI fans (PNP ID "PNP0C0B"). That's necessary for user space thermal management tools to be able to connect the fans with the parts of the system they are supposed to be cooling properly. From Srinivas Pandruvada" * tag 'pm+acpi-3.19-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (32 commits) MAINTAINERS: add entry for intel_pstate ACPI / video: update the skip case for acpi_video_device_in_dod() power / PM: Eliminate CONFIG_PM_RUNTIME NFC / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM SCSI / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM ACPI / EC: Fix unexpected ec_remove_handlers() invocations Revert "tools: cpupower: fix return checks for sysfs_get_idlestate_count()" tracing / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM x86 / PM: Replace CONFIG_PM_RUNTIME in io_apic.c PM: Remove the SET_PM_RUNTIME_PM_OPS() macro mmc: atmel-mci: use SET_RUNTIME_PM_OPS() macro PM / Kconfig: Replace PM_RUNTIME with PM in dependencies ARM / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM sound / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM phy / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM video / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM tty / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM spi: Replace CONFIG_PM_RUNTIME with CONFIG_PM ACPI / PM: Do not disable wakeup GPEs that have not been enabled ACPI / utils: Drop error messages from acpi_evaluate_reference() ...
2014-12-18Merge branches 'pm-opp', 'pm-cpufreq' and 'pm-tools'Rafael J. Wysocki
* pm-opp: PM / OPP: do error handling at the bottom of dev_pm_opp_add_dynamic() PM / OPP: handle allocation of device_opp in a separate routine PM / OPP: reuse find_device_opp() instead of duplicating code PM / OPP: Staticize __dev_pm_opp_remove() PM / OPP: replace kfree with kfree_rcu while freeing 'struct device_opp' * pm-cpufreq: MAINTAINERS: add entry for intel_pstate intel_pstate: Add a few comments intel_pstate: add kernel parameter to force loading * pm-tools: Revert "tools: cpupower: fix return checks for sysfs_get_idlestate_count()"
2014-12-14Merge tag 'driver-core-3.19-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core Pull driver core update from Greg KH: "Here's the set of driver core patches for 3.19-rc1. They are dominated by the removal of the .owner field in platform drivers. They touch a lot of files, but they are "simple" changes, just removing a line in a structure. Other than that, a few minor driver core and debugfs changes. There are some ath9k patches coming in through this tree that have been acked by the wireless maintainers as they relied on the debugfs changes. Everything has been in linux-next for a while" * tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (324 commits) Revert "ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries" fs: debugfs: add forward declaration for struct device type firmware class: Deletion of an unnecessary check before the function call "vunmap" firmware loader: fix hung task warning dump devcoredump: provide a one-way disable function device: Add dev_<level>_once variants ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries ath: use seq_file api for ath9k debugfs files debugfs: add helper function to create device related seq_file drivers/base: cacheinfo: remove noisy error boot message Revert "core: platform: add warning if driver has no owner" drivers: base: support cpu cache information interface to userspace via sysfs drivers: base: add cpu_device_create to support per-cpu devices topology: replace custom attribute macros with standard DEVICE_ATTR* cpumask: factor out show_cpumap into separate helper function driver core: Fix unbalanced device reference in drivers_probe driver core: fix race with userland in device_add() sysfs/kernfs: make read requests on pre-alloc files use the buffer. sysfs/kernfs: allow attributes to request write buffer be pre-allocated. fs: sysfs: return EGBIG on write if offset is larger than file size ...
2014-12-13memory-hotplug: remove redundant call of page_to_pfnZhang Zhen
This is just a small optimization. The start_pfn can be obtained directly by phys_index << PFN_SECTION_SHIFT. So the call of page_to_pfn() is redundant and remove it. Signed-off-by: Zhang Zhen <zhenzhang.zhang@huawei.com> Acked-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Acked-by: David Rientjes <rientjes@google.com> Cc: Dave Hansen <dave@sr71.net> Cc: Wang Nan <wangnan0@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-12-11Merge tag 'devicetree-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/glikely/linux Pull devicetree changes from Grant Likely: "Lots of activity in the devicetree code for v3.18. Most of it is related to getting all of the overlay support code in place, but there are other important things in there. Highlights: - OF_RECONFIG notifiers for SPI, I2C and Platform devices. Those subsystems can now respond to live changes to the device tree. - CONFIG_OF_OVERLAY method for applying live changes to the device tree - Removal of the of_allnodes list. This used to be used to iterate over all the nodes in the device tree, but it is unnecessary because the same thing can be done by iterating over the list of child pointers. Getting rid of of_allnodes saves some memory and avoids the possibility of of_allnodes being sorted differently from the child lists. - Support for retrieving original DTB blob via sysfs. Needed by kexec. - More unittests - Documentation and minor bug fixes" * tag 'devicetree-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/glikely/linux: (42 commits) of: Delete unnecessary check before calling "of_node_put()" of: Drop ->next pointer from struct device_node spi: Check for spi_of_notifier when CONFIG_OF_DYNAMIC=y of: support passing console options with stdout-path of: add optional options parameter to of_find_node_by_path() of: Add bindings for chosen node, stdout-path of: Remove unneeded and incorrect MODULE_DEVICE_TABLE ARM: dt: fix up PL011 device tree bindings of: base, fix of_property_read_string_helper kernel-doc of: remove select of non-existant OF_DEVICE config symbol spi/of: Add OF notifier handler spi/of: Create new device registration method and accessors i2c/of: Add OF_RECONFIG notifier handler i2c/of: Factor out Devicetree registration code of/overlay: Add overlay unittests of/overlay: Introduce DT overlay support of/reconfig: Add OF_DYNAMIC notifier for platform_bus_type of/reconfig: Always use the same structure for notifiers of/reconfig: Add debug output for OF_RECONFIG notifiers of/reconfig: Add empty stubs for the of_reconfig methods ...
2014-12-11Merge branch 'fixes'Rafael J. Wysocki
* fixes: PM / OPP: remove double calls to find_device_opp() PM / OPP: set new_opp->dev_opp to a valid dev_opp leds: leds-gpio: Fix the "default-state" property check
2014-12-10Merge tag 'pm+acpi-3.19-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull ACPI and power management updates from Rafael Wysocki: "This time we have some more new material than we used to have during the last couple of development cycles. The most important part of it to me is the introduction of a unified interface for accessing device properties provided by platform firmware. It works with Device Trees and ACPI in a uniform way and drivers using it need not worry about where the properties come from as long as the platform firmware (either DT or ACPI) makes them available. It covers both devices and "bare" device node objects without struct device representation as that turns out to be necessary in some cases. This has been in the works for quite a few months (and development cycles) and has been approved by all of the relevant maintainers. On top of that, some drivers are switched over to the new interface (at25, leds-gpio, gpio_keys_polled) and some additional changes are made to the core GPIO subsystem to allow device drivers to manipulate GPIOs in the "canonical" way on platforms that provide GPIO information in their ACPI tables, but don't assign names to GPIO lines (in which case the driver needs to do that on the basis of what it knows about the device in question). That also has been approved by the GPIO core maintainers and the rfkill driver is now going to use it. Second is support for hardware P-states in the intel_pstate driver. It uses CPUID to detect whether or not the feature is supported by the processor in which case it will be enabled by default. However, it can be disabled entirely from the kernel command line if necessary. Next is support for a platform firmware interface based on ACPI operation regions used by the PMIC (Power Management Integrated Circuit) chips on the Intel Baytrail-T and Baytrail-T-CR platforms. That interface is used for manipulating power resources and for thermal management: sensor temperature reporting, trip point setting and so on. Also the ACPI core is now going to support the _DEP configuration information in a limited way. Basically, _DEP it supposed to reflect off-the-hierarchy dependencies between devices which may be very indirect, like when AML for one device accesses locations in an operation region handled by another device's driver (usually, the device depended on this way is a serial bus or GPIO controller). The support added this time is sufficient to make the ACPI battery driver work on Asus T100A, but it is general enough to be able to cover some other use cases in the future. Finally, we have a new cpufreq driver for the Loongson1B processor. In addition to the above, there are fixes and cleanups all over the place as usual and a traditional ACPICA update to a recent upstream release. As far as the fixes go, the ACPI LPSS (Low-power Subsystem) driver for Intel platforms should be able to handle power management of the DMA engine correctly, the cpufreq-dt driver should interact with the thermal subsystem in a better way and the ACPI backlight driver should handle some more corner cases, among other things. On top of the ACPICA update there are fixes for race conditions in the ACPICA's interrupt handling code which might lead to some random and strange looking failures on some systems. In the cleanups department the most visible part is the series of commits targeted at getting rid of the CONFIG_PM_RUNTIME configuration option. That was triggered by a discussion regarding the generic power domains code during which we realized that trying to support certain combinations of PM config options was painful and not really worth it, because nobody would use them in production anyway. For this reason, we decided to make CONFIG_PM_SLEEP select CONFIG_PM_RUNTIME and that lead to the conclusion that the latter became redundant and CONFIG_PM could be used instead of it. The material here makes that replacement in a major part of the tree, but there will be at least one more batch of that in the second part of the merge window. Specifics: - Support for retrieving device properties information from ACPI _DSD device configuration objects and a unified device properties interface for device drivers (and subsystems) on top of that. As stated above, this works with Device Trees and ACPI and allows device drivers to be written in a platform firmware (DT or ACPI) agnostic way. The at25, leds-gpio and gpio_keys_polled drivers are now going to use this new interface and the GPIO subsystem is additionally modified to allow device drivers to assign names to GPIO resources returned by ACPI _CRS objects (in case _DSD is not present or does not provide the expected data). The changes in this set are mostly from Mika Westerberg, Rafael J Wysocki, Aaron Lu, and Darren Hart with some fixes from others (Fabio Estevam, Geert Uytterhoeven). - Support for Hardware Managed Performance States (HWP) as described in Volume 3, section 14.4, of the Intel SDM in the intel_pstate driver. CPUID is used to detect whether or not the feature is supported by the processor. If supported, it will be enabled automatically unless the intel_pstate=no_hwp switch is present in the kernel command line. From Dirk Brandewie. - New Intel Broadwell-H ID for intel_pstate (Dirk Brandewie). - Support for firmware interface based on ACPI operation regions used by the PMIC chips on the Intel Baytrail-T and Baytrail-T-CR platforms for power resource control and thermal management (Aaron Lu). - Limited support for retrieving off-the-hierarchy dependencies between devices from ACPI _DEP device configuration objects and deferred probing support for the ACPI battery driver based on the _DEP information to make that driver work on Asus T100A (Lan Tianyu). - New cpufreq driver for the Loongson1B processor (Kelvin Cheung). - ACPICA update to upstream revision 20141107 which only affects tools (Bob Moore). - Fixes for race conditions in the ACPICA's interrupt handling code and in the ACPI code related to system suspend and resume (Lv Zheng and Rafael J Wysocki). - ACPI core fix for an RCU-related issue in the ioremap() regions management code that slowed down significantly after CPUs had been allowed to enter idle states even if they'd had RCU callbakcs queued and triggered some problems in certain proprietary graphics driver (and elsewhere). The fix replaces synchronize_rcu() in that code with synchronize_rcu_expedited() which makes the issue go away. From Konstantin Khlebnikov. - ACPI LPSS (Low-Power Subsystem) driver fix to handle power management of the DMA engine included into the LPSS correctly. The problem is that the DMA engine doesn't have ACPI PM support of its own and it simply is turned off when the last LPSS device having ACPI PM support goes into D3cold. To work around that, the PM domain used by the ACPI LPSS driver is redesigned so at least one device with ACPI PM support will be on as long as the DMA engine is in use. From Andy Shevchenko. - ACPI backlight driver fix to avoid using it on "Win8-compatible" systems where it doesn't work and where it was used by default by mistake (Aaron Lu). - Assorted minor ACPI core fixes and cleanups from Tomasz Nowicki, Sudeep Holla, Huang Rui, Hanjun Guo, Fabian Frederick, and Ashwin Chaugule (mostly related to the upcoming ARM64 support). - Intel RAPL (Running Average Power Limit) power capping driver fixes and improvements including new processor IDs (Jacob Pan). - Generic power domains modification to power up domains after attaching devices to them to meet the expectations of device drivers and bus types assuming devices to be accessible at probe time (Ulf Hansson). - Preliminary support for controlling device clocks from the generic power domains core code and modifications of the ARM/shmobile platform to use that feature (Ulf Hansson). - Assorted minor fixes and cleanups of the generic power domains core code (Ulf Hansson, Geert Uytterhoeven). - Assorted minor fixes and cleanups of the device clocks control code in the PM core (Geert Uytterhoeven, Grygorii Strashko). - Consolidation of device power management Kconfig options by making CONFIG_PM_SLEEP select CONFIG_PM_RUNTIME and removing the latter which is now redundant (Rafael J Wysocki and Kevin Hilman). That is the first batch of the changes needed for this purpose. - Core device runtime power management support code cleanup related to the execution of callbacks (Andrzej Hajda). - cpuidle ARM support improvements (Lorenzo Pieralisi). - cpuidle cleanup related to the CPUIDLE_FLAG_TIME_VALID flag and a new MAINTAINERS entry for ARM Exynos cpuidle (Daniel Lezcano and Bartlomiej Zolnierkiewicz). - New cpufreq driver callback (->ready) to be executed when the cpufreq core is ready to use a given policy object and cpufreq-dt driver modification to use that callback for cooling device registration (Viresh Kumar). - cpufreq core fixes and cleanups (Viresh Kumar, Vince Hsu, James Geboski, Tomeu Vizoso). - Assorted fixes and cleanups in the cpufreq-pcc, intel_pstate, cpufreq-dt, pxa2xx cpufreq drivers (Lenny Szubowicz, Ethan Zhao, Stefan Wahren, Petr Cvek). - OPP (Operating Performance Points) framework modification to allow OPPs to be removed too and update of a few cpufreq drivers (cpufreq-dt, exynos5440, imx6q, cpufreq) to remove OPPs (added during initialization) on driver removal (Viresh Kumar). - Hibernation core fixes and cleanups (Tina Ruchandani and Markus Elfring). - PM Kconfig fix related to CPU power management (Pankaj Dubey). - cpupower tool fix (Prarit Bhargava)" * tag 'pm+acpi-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (120 commits) i2c-omap / PM: Drop CONFIG_PM_RUNTIME from i2c-omap.c dmaengine / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM tools: cpupower: fix return checks for sysfs_get_idlestate_count() drivers: sh / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM e1000e / igb / PM: Eliminate CONFIG_PM_RUNTIME MMC / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM MFD / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM misc / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM media / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM input / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM leds: leds-gpio: Fix multiple instances registration without 'label' property iio / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM hsi / OMAP / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM i2c-hid / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM drm / exynos / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM gpio / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM hwrandom / exynos / PM: Use CONFIG_PM in #ifdef block / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM USB / PM: Drop CONFIG_PM_RUNTIME from the USB core PM: Merge the SET*_RUNTIME_PM_OPS() macros ...
2014-12-10cma: make default CMA area size zero for x86Akinobu Mita
This makes CMA memory area size zero for x86 in default configuration (doesn't change on the other architectures). If default CMA size is zero, DMA_CMA is disabled. It can be enabled by passing cma= to the kernel. This makes less impact on x86. Because there is no mainline driver that requires it for x86, and Peter Hurley reported the performance regression, as this is trying to drive _all_ dma mapping allocations through a _very_ small window. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Reported-by: Peter Hurley <peter@hurleysoftware.com> Cc: Peter Hurley <peter@hurleysoftware.com> Cc: Chuck Ebbert <cebbert.lkml@gmail.com> Cc: Jean Delvare <jdelvare@suse.de> Acked-by: Marek Szyprowski <m.szyprowski@samsung.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Don Dutile <ddutile@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-12-10PM / OPP: do error handling at the bottom of dev_pm_opp_add_dynamic()Viresh Kumar
This makes it less error prone and moves common resource deallocation at a single place. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-12-10PM / OPP: handle allocation of device_opp in a separate routineViresh Kumar
Get the 'device_opp' allocation code into a separate routine to keep only the necessary part in dev_pm_opp_add_dynamic(). Also do s/sizeof(struct device_opp)/sizeof(*dev_opp) and remove the print message on kzalloc() failure as checkpatch warns for that. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-12-10PM / OPP: reuse find_device_opp() instead of duplicating codeViresh Kumar
Reuse find_device_opp() in opp_set_availability() instead of duplicating code. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-12-10PM / OPP: Staticize __dev_pm_opp_remove()Viresh Kumar
Its a local routine and need not be accessible outside of opp.c. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-12-10PM / OPP: replace kfree with kfree_rcu while freeing 'struct device_opp'Viresh Kumar
Somehow one of the instance of freeing resources failed to use kfree_rcu() and used kfree() instead. This might cause problems as the node might be referenced by readers under rcu locks and we must wait for the rcu grace period as well. While we are at it, also update comment over 'struct device_opp' to mention why we are waiting for both rcu and srcu grace periods. Fixes: 129eec55df6a (PM / OPP Introduce APIs to remove OPPs) Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-12-10Merge branch 'pm-opp'Rafael J. Wysocki
* pm-opp: PM / OPP: remove double calls to find_device_opp() PM / OPP: set new_opp->dev_opp to a valid dev_opp
2014-12-10PM / OPP: remove double calls to find_device_opp()Viresh Kumar
By mistake we called find_device_opp() twice in of_free_opp_table(), fix it. Generated diff doesn't show the problem well and so here is the code snippet: void of_free_opp_table(struct device *dev) { struct device_opp *dev_opp = find_device_opp(dev); struct dev_pm_opp *opp, *tmp; /* Check for existing list for 'dev' */ dev_opp = find_device_opp(dev); ... } Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-12-10PM / OPP: set new_opp->dev_opp to a valid dev_oppViresh Kumar
We find/allocate dev_opp after using its value to fill new_opp->dev_opp right now. Move this to a later point where dev_opp is valid. Fixes: a7470db6fec4 (PM / OPP don't match for existing OPPs when list is empty) Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-12-08Merge branch 'pm-runtime'Rafael J. Wysocki
* pm-runtime: (25 commits) i2c-omap / PM: Drop CONFIG_PM_RUNTIME from i2c-omap.c dmaengine / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM drivers: sh / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM e1000e / igb / PM: Eliminate CONFIG_PM_RUNTIME MMC / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM MFD / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM misc / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM media / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM input / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM iio / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM hsi / OMAP / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM i2c-hid / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM drm / exynos / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM gpio / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM hwrandom / exynos / PM: Use CONFIG_PM in #ifdef block / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM USB / PM: Drop CONFIG_PM_RUNTIME from the USB core PM: Merge the SET*_RUNTIME_PM_OPS() macros PM / Kconfig: Do not select PM directly from Kconfig files PCI / PM: Drop CONFIG_PM_RUNTIME from the PCI core ...
2014-12-08Merge branches 'pm-domains', 'pm-sleep' and 'pm-tools'Rafael J. Wysocki
* pm-domains: ARM: shmobile: Convert to genpd flags for PM clocks for R-mobile ARM: shmobile: Convert to genpd flags for PM clocks for r8a7779 PM / Domains: Initial PM clock support for genpd PM / Domains: Power on the PM domain right after attach completes PM / Domains: Move struct pm_domain_data to pm_domain.h PM / Domains: Extract code to power off/on a PM domain PM / Domains: Make genpd parameter of pm_genpd_present() const * pm-sleep: PM / hibernate: Deletion of an unnecessary check before the function call "vfree" PM / Hibernate: Migrate to ktime_t * pm-tools: tools: cpupower: fix return checks for sysfs_get_idlestate_count()
2014-12-08Merge branches 'powercap', 'pm-clk', 'pm-config' and 'pm-opp'Rafael J. Wysocki
* powercap: powercap / RAPL: fix build dependency on iosf_mbi powercap / RAPL: add new model ids powercap / RAPL: handle atom and core differences powercap / RAPL: abstract per cpu type functions * pm-clk: PM / clock_ops: make __pm_clk_enable more generic PM / clock_ops: Add pm_clk_add_clk() * pm-config: PM: Kconfig: fix unmet dependency for CPU_PM * pm-opp: PM / OPP replace kfree_rcu() with call_srcu() in opp_set_availability() PM / OPP Introduce APIs to remove OPPs PM / OPP mark OPPs as 'static' or 'dynamic' PM / OPP don't match for existing OPPs when list is empty PM / OPP rename 'head' as 'rcu_head' or 'srcu_head' based on its type
2014-12-08Merge branch 'device-properties'Rafael J. Wysocki
* device-properties: leds: leds-gpio: Fix multiple instances registration without 'label' property leds: leds-gpio: Fix legacy GPIO number case ACPI / property: Drop size_prop from acpi_dev_get_property_reference() leds: leds-gpio: Convert gpio_blink_set() to use GPIO descriptors ACPI / GPIO: Document ACPI GPIO mappings API net: rfkill: gpio: Add default GPIO driver mappings for ACPI ACPI / GPIO: Driver GPIO mappings for ACPI GPIOs input: gpio_keys_polled: Make use of device property API leds: leds-gpio: Make use of device property API gpio: Support for unified device properties interface Driver core: Unified interface for firmware node properties input: gpio_keys_polled: Add support for GPIO descriptors leds: leds-gpio: Add support for GPIO descriptors gpio: sch: Consolidate core and resume banks gpio / ACPI: Add support for _DSD device properties misc: at25: Make use of device property API ACPI: Allow drivers to match using Device Tree compatible property Driver core: Unified device properties interface for platform firmware ACPI: Add support for device specific properties
2014-12-04PM: Drop CONFIG_PM_RUNTIME from the driver coreRafael J. Wysocki
After commit b2b49ccbdd54 (PM: Kconfig: Set PM_RUNTIME if PM_SLEEP is selected) PM_RUNTIME is always set if PM is set, so quite a few depend on CONFIG_PM or even may be dropped entirely in some cases. Replace CONFIG_PM_RUNTIME with CONFIG_PM in the PM core code. Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Acked-by: Kevin Hilman <khilman@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-12-04PM / Domains: Initial PM clock support for genpdUlf Hansson
It's quite common for PM domains to use PM clocks. Typically from SOC specific code, the per device PM clock list is created and pm_clk_suspend|resume() are invoked to handle clock gating/ungating. A step towards consolidation is to integrate PM clock support into genpd, which is what this patch does. In this initial step, the calls to the pm_clk_suspend|resume() are handled within genpd, but the per device PM clock list still needs to be created from SOC specific code. It seems reasonable to have gendp to handle that as well, but that left to future patches to address. It's not every users of genpd that are keen on using PM clocks, thus we need to provide this a configuration option for genpd. Therefore let's add flag field in the genpd struct to keep this information and define a new GENDP_FLAG_PM_CLK bit for it. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Kevin Hilman <khilman@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-11-29PM / OPP replace kfree_rcu() with call_srcu() in opp_set_availability()Viresh Kumar
This existed before we introduced call_srcu() in opp layer to synchronize with srcu_notifier_call_chain() while removing OPPs. And is a potential bug which wasn't noticed earlier. Let fix it as well by using the right API to free OPP. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-11-29PM / OPP Introduce APIs to remove OPPsViresh Kumar
OPPs are created statically (from DT) or dynamically. Currently we don't free OPPs that are created statically, when the module unloads. And so if the module is inserted back again, we get warning for duplicate OPPs as the same were already present. Also, there might be a need to remove dynamic OPPs in future and so API for that is also added. This patch adds helper APIs to remove/free existing static and dynamic OPPs. Because the OPPs are used both under RCU and SRCU, we have to wait for grace period of both. And so are using kfree_rcu() from within call_srcu(). Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-11-29PM / OPP mark OPPs as 'static' or 'dynamic'Viresh Kumar
Static OPPs are the ones created from Device Tree entries and dynamic are the ones created at runtime by calling dev_pm_opp_add(). There is a need to distinguish them as we need to free static OPPs from cpufreq drivers when they are removed. So, add another field 'dynamic' in 'struct dev_pm_opp' to keep this information. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-11-29PM / OPP don't match for existing OPPs when list is emptyViresh Kumar
OPP list is guaranteed to be empty when 'dev_opp' is created. And so we don't need to run the comparison loop with existing OPPs. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-11-29PM / OPP rename 'head' as 'rcu_head' or 'srcu_head' based on its typeViresh Kumar
Both 'struct dev_pm_opp' and 'struct device_opp' have member with name 'head' but with different types. This leads to confusion while reading the code. Name them 'rcu_head' and 'srcu_head'. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-11-29Merge branch 'pm-clk' into pm-runtimeRafael J. Wysocki
2014-11-26firmware class: Deletion of an unnecessary check before the function call ↵Markus Elfring
"vunmap" The vunmap() function performes also input parameter validation. Thus the test around the call is not needed. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-11-26firmware loader: fix hung task warning dumpKweh, Hock Leong
When using request_firmware_nowait() with FW_ACTION_NOHOTPLUG param to expose user helper interface, if the user do not react immediately, after 120 seconds there will be a hung task warning message dumped as below: [ 3000.784235] INFO: task kworker/0:0:8259 blocked for more than 120 seconds. [ 3000.791281] Tainted: G E 3.16.0-rc1-yocto-standard #41 [ 3000.798082] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 3000.806072] kworker/0:0 D cd0075c8 0 8259 2 0x00000000 [ 3000.812765] Workqueue: events request_firmware_work_func [ 3000.818253] cd375e18 00000046 0000000e cd0075c8 000000f0 cd40ea00 cd375fec 1b883e89 [ 3000.826374] 0000026b cd40ea00 80000000 00000001 cd0075c8 00000000 cd375de4 c119917f [ 3000.834492] cd563360 cd375df4 c119a0ab cd563360 00000000 cd375e24 c119a1d6 00000000 [ 3000.842616] Call Trace: [ 3000.845252] [<c119917f>] ? kernfs_next_descendant_post+0x3f/0x50 [ 3000.851543] [<c119a0ab>] ? kernfs_activate+0x6b/0xc0 [ 3000.856790] [<c119a1d6>] ? kernfs_add_one+0xd6/0x130 [ 3000.862047] [<c15fdb02>] schedule+0x22/0x60 [ 3000.866548] [<c15fd195>] schedule_timeout+0x175/0x1d0 [ 3000.871887] [<c119b391>] ? __kernfs_create_file+0x71/0xa0 [ 3000.877574] [<c119bb9a>] ? sysfs_add_file_mode_ns+0xaa/0x180 [ 3000.883533] [<c15fe84f>] wait_for_completion+0x6f/0xb0 [ 3000.888961] [<c1065200>] ? wake_up_process+0x40/0x40 [ 3000.894219] [<c13cb600>] _request_firmware+0x750/0x9f0 [ 3000.899666] [<c1382a7f>] ? n_tty_receive_buf2+0x1f/0x30 [ 3000.905200] [<c13cba02>] request_firmware_work_func+0x22/0x50 [ 3000.911235] [<c10550d2>] process_one_work+0x122/0x380 [ 3000.916571] [<c1055859>] worker_thread+0xf9/0x470 [ 3000.921555] [<c1055760>] ? create_and_start_worker+0x50/0x50 [ 3000.927497] [<c1055760>] ? create_and_start_worker+0x50/0x50 [ 3000.933448] [<c105a5ff>] kthread+0x9f/0xc0 [ 3000.937850] [<c15ffd40>] ret_from_kernel_thread+0x20/0x30 [ 3000.943548] [<c105a560>] ? kthread_worker_fn+0x100/0x100 This patch change the wait_for_completion() function call to wait_for_completion_interruptible() function call for solving the issue. Cc: Matt Fleming <matt.fleming@intel.com> Signed-off-by: Kweh, Hock Leong <hock.leong.kweh@intel.com> Acked-by: Ming Lei <ming.lei@canonical.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-11-26devcoredump: provide a one-way disable functionJohannes Berg
Since device/firmware coredumps can contain private data, it can be desirable to turn them off unconditionally to be certain that no such data will be collected by the system. To achieve this, provide a "disabled" sysfs class attribute that can only be changed from 0 to 1 and not back. Upon disabling, discard existing coredumps and stop storing new ones. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Reviewed-by: Kees Cook <keescook@chromium.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-11-27Merge back earlier 'pm-runtime' material for 3.19-rc1.Rafael J. Wysocki
2014-11-24of/reconfig: Add OF_DYNAMIC notifier for platform_bus_typePantelis Antoniou
Add OF notifier handler needed for creating/destroying platform devices according to dynamic runtime changes in the DT live tree. Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-11-24drivers/base: cacheinfo: remove noisy error boot messageSudeep Holla
On systems that don't support cacheinfo, this error message can be considered noisy and irrelevant. The error messages can be added to the functions that architectures implement overiding the weak default definition if really required. This patch removes the concerned error message in the generic code. Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Reported-by: Fabio Estevam <festevam@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-11-21Merge remote-tracking branches 'regmap/topic/ac97' and ↵Mark Brown
'regmap/topic/headers' into regmap-next
2014-11-21Merge remote-tracking branch 'regmap/topic/cache' into regmap-nextMark Brown
2014-11-21Merge remote-tracking branch 'regmap/fix/cache' into regmap-linusMark Brown
2014-11-20PM / Domains: Power on the PM domain right after attach completesUlf Hansson
Vast amount of platform drivers which enables runtime PM, don't invoke a pm_runtime_get_sync() while probing their devices. Instead, once they have turned on their PM resourses during ->probe() and are ready to handle I/O, these invokes pm_runtime_set_active() to synchronize its state towards the runtime PM core. From the runtime PM point of view this behavior is perfectly acceptable, but we encounter probe failures if their corresponding devices resides in the generic PM domain. The issues are observed for those devices, which requires its PM domain to stay powered during ->probe() since that's not being controlled. While using the generic OF-based PM domain look-up, a device's PM domain will be attached during the probe sequence. For this path, let's fix the probe failures, by simply power on the PM domain right after when it's been attached to the device. The generic PM domain stays powered until all of its devices becomes runtime PM enabled and runtime PM suspended. The old SOCs which makes use of the generic PM domain but don't use the generic OF-based PM domain look-up, will not be affected from this change. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-11-19regmap: ac97: Add generic AC'97 callbacksMark Brown
Use the recently added support for bus operations to provide a standard mapping for AC'97 register I/O. Signed-off-by: Mark Brown <broonie@kernel.org> Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2014-11-18Merge back 'pm-domains' material for 3.19-rc1.Rafael J. Wysocki
2014-11-14Merge branches 'pm-domains', 'pm-sleep' and 'pm-cpufreq'Rafael J. Wysocki
* pm-domains: PM / Domains: Fix initial default state of the need_restore flag PM / Domains: Change prototype for the attach and detach callbacks * pm-sleep: PM / sleep: Fix entering suspend-to-IDLE if no freeze_oops is set * pm-cpufreq: cpufreq: Avoid crash in resume on SMP without OPP cpufreq: cpufreq-dt: Fix arguments in clock failure error message
2014-11-14PM / Domains: Extract code to power off/on a PM domainGeert Uytterhoeven
PM domains are powered on/off from various places. Some callers do latency measurements, others don't. Consolidate using two helper functions, which always measure the latencies, and update the stored latencies when needed. Other minor changes: - Use pr_warn() instead of pr_warning(), - There's no need to check genpd->name, %s handles NULL pointers fine, - Make the warning format strings identical, to save memory. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Kevin Hilman <khilman@linaro.org> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-11-14PM / Domains: Make genpd parameter of pm_genpd_present() constGeert Uytterhoeven
The PM domain pointed to by the genpd parameter is never modified. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Kevin Hilman <khilman@linaro.org> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-11-11PM / Domains: Fix initial default state of the need_restore flagUlf Hansson
The initial state of the device's need_restore flag should'nt depend on the current state of the PM domain. For example it should be perfectly valid to attach an inactive device to a powered PM domain. The pm_genpd_dev_need_restore() API allow us to update the need_restore flag to somewhat cope with such scenarios. Typically that should have been done from drivers/buses ->probe() since it's those that put the requirements on the value of the need_restore flag. Until recently, the Exynos SOCs were the only user of the pm_genpd_dev_need_restore() API, though invoking it from a centralized location while adding devices to their PM domains. Due to that Exynos now have swithed to the generic OF-based PM domain look-up, it's no longer possible to invoke the API from a centralized location. The reason is because devices are now added to their PM domains during the probe sequence. Commit "ARM: exynos: Move to generic PM domain DT bindings" did the switch for Exynos to the generic OF-based PM domain look-up, but it also removed the call to pm_genpd_dev_need_restore(). This caused a regression for some of the Exynos drivers. To handle things more properly in the generic PM domain, let's change the default initial value of the need_restore flag to reflect that the state is unknown. As soon as some of the runtime PM callbacks gets invoked, update the initial value accordingly. Moreover, since the generic PM domain is verifying that all devices are both runtime PM enabled and suspended, using pm_runtime_suspended() while pm_genpd_poweroff() is invoked from the scheduled work, we can be sure of that the PM domain won't be powering off while having active devices. Do note that, the generic PM domain can still only know about active devices which has been activated through invoking its runtime PM resume callback. In other words, buses/drivers using pm_runtime_set_active() during ->probe() will still suffer from a race condition, potentially probing a device without having its PM domain being powered. That issue will have to be solved using a different approach. This a log from the boot regression for Exynos5, which is being fixed in this patch. ------------[ cut here ]------------ WARNING: CPU: 0 PID: 308 at ../drivers/clk/clk.c:851 clk_disable+0x24/0x30() Modules linked in: CPU: 0 PID: 308 Comm: kworker/0:1 Not tainted 3.18.0-rc3-00569-gbd9449f-dirty #10 Workqueue: pm pm_runtime_work [<c0013c64>] (unwind_backtrace) from [<c0010dec>] (show_stack+0x10/0x14) [<c0010dec>] (show_stack) from [<c03ee4cc>] (dump_stack+0x70/0xbc) [<c03ee4cc>] (dump_stack) from [<c0020d34>] (warn_slowpath_common+0x64/0x88) [<c0020d34>] (warn_slowpath_common) from [<c0020d74>] (warn_slowpath_null+0x1c/0x24) [<c0020d74>] (warn_slowpath_null) from [<c03107b0>] (clk_disable+0x24/0x30) [<c03107b0>] (clk_disable) from [<c02cc834>] (gsc_runtime_suspend+0x128/0x160) [<c02cc834>] (gsc_runtime_suspend) from [<c0249024>] (pm_generic_runtime_suspend+0x2c/0x38) [<c0249024>] (pm_generic_runtime_suspend) from [<c024f44c>] (pm_genpd_default_save_state+0x2c/0x8c) [<c024f44c>] (pm_genpd_default_save_state) from [<c024ff2c>] (pm_genpd_poweroff+0x224/0x3ec) [<c024ff2c>] (pm_genpd_poweroff) from [<c02501b4>] (pm_genpd_runtime_suspend+0x9c/0xcc) [<c02501b4>] (pm_genpd_runtime_suspend) from [<c024a4f8>] (__rpm_callback+0x2c/0x60) [<c024a4f8>] (__rpm_callback) from [<c024a54c>] (rpm_callback+0x20/0x74) [<c024a54c>] (rpm_callback) from [<c024a930>] (rpm_suspend+0xd4/0x43c) [<c024a930>] (rpm_suspend) from [<c024bbcc>] (pm_runtime_work+0x80/0x90) [<c024bbcc>] (pm_runtime_work) from [<c0032a9c>] (process_one_work+0x12c/0x314) [<c0032a9c>] (process_one_work) from [<c0032cf4>] (worker_thread+0x3c/0x4b0) [<c0032cf4>] (worker_thread) from [<c003747c>] (kthread+0xcc/0xe8) [<c003747c>] (kthread) from [<c000e738>] (ret_from_fork+0x14/0x3c) ---[ end trace 40cd58bcd6988f12 ]--- Fixes: a4a8c2c4962bb655 (ARM: exynos: Move to generic PM domain DT bindings) Reported-and-tested0by: Sylwester Nawrocki <s.nawrocki@samsung.com> Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Reviewed-by: Kevin Hilman <khilman@linaro.org> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-11-11Revert "core: platform: add warning if driver has no owner"Wolfram Sang
This is too noisy at the moment, triggered by codepaths not accessed on our test-systems. Needs more investigation. Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-11-08PM / Domains: Change prototype for the attach and detach callbacksUlf Hansson
Convert the prototypes to return an int in order to support error handling in these callbacks. Also, as suggested by Dmitry Torokhov, pass the domain pointer for use inside the callbacks, and so that they match the existing power_on/power_off callbacks which currently take the domain pointer. Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> [ khilman: added domain as parameter to callbacks, as suggested by Dmitry ] Signed-off-by: Kevin Hilman <khilman@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-11-07drivers: base: support cpu cache information interface to userspace via sysfsSudeep Holla
This patch adds initial support for providing processor cache information to userspace through sysfs interface. This is based on already existing implementations(x86, ia64, s390 and powerpc) and hence the interface is intended to be fully compatible. The main purpose of this generic support is to avoid further code duplication to support new architectures and also to unify all the existing different implementations. This implementation maintains the hierarchy of cache objects which reflects the system's cache topology. Cache devices are instantiated as needed as CPUs come online. The cache information is replicated per-cpu even if they are shared. A per-cpu array of cache information maintained is used mainly for sysfs-related book keeping. It also implements the shared_cpu_map attribute, which is essential for enabling both kernel and user-space to discover the system's overall cache topology. This patch also add the missing ABI documentation for the cacheinfo sysfs interface already, which is well defined and widely used. Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Reviewed-by: Stephen Boyd <sboyd@codeaurora.org> Tested-by: Stephen Boyd <sboyd@codeaurora.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: linux-api@vger.kernel.org Cc: linux390@de.ibm.com Cc: linux-arm-kernel@lists.infradead.org Cc: linux-ia64@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-s390@vger.kernel.org Cc: x86@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-11-07drivers: base: add cpu_device_create to support per-cpu devicesSudeep Holla
This patch adds a new function to create per-cpu devices. This helps in: 1. reusing the device infrastructure to create any cpu related attributes and corresponding sysfs instead of creating and dealing with raw kobjects directly 2. retaining the legacy path(/sys/devices/system/cpu/..) to support existing sysfs ABI 3. avoiding to create links in the bus directory pointing to the device as there would be per-cpu instance of these devices with the same name since dev->bus is not populated to cpu_sysbus on purpose Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Tested-by: Stephen Boyd <sboyd@codeaurora.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: David Herrmann <dh.herrmann@gmail.com> Cc: Kay Sievers <kay@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-11-07topology: replace custom attribute macros with standard DEVICE_ATTR*Sudeep Holla
Currently couple of custom macros are defined to declare the device attributes. However there are already standard macros defined in device.h that suffice the need and these custom macros can be removed. This patch replaces custom attribute macros with standard DEVICE_ATTR_RO attribute Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-11-07cpumask: factor out show_cpumap into separate helper functionSudeep Holla
Many sysfs *_show function use cpu{list,mask}_scnprintf to copy cpumap to the buffer aligned to PAGE_SIZE, append '\n' and '\0' to return null terminated buffer with newline. This patch creates a new helper function cpumap_print_to_pagebuf in cpumask.h using newly added bitmap_print_to_pagebuf and consolidates most of those sysfs functions using the new helper function. Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Suggested-by: Stephen Boyd <sboyd@codeaurora.org> Tested-by: Stephen Boyd <sboyd@codeaurora.org> Acked-by: "Rafael J. Wysocki" <rjw@rjwysocki.net> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: x86@kernel.org Cc: linux-acpi@vger.kernel.org Cc: linux-pci@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>