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* Merge tag 'pci-v5.5-changes' of ↵Linus Torvalds2019-12-031-12/+12
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci Pull PCI updates from Bjorn Helgaas: "Enumeration: - Warn if a host bridge has no NUMA info (Yunsheng Lin) - Add PCI_STD_NUM_BARS for the number of standard BARs (Denis Efremov) Resource management: - Fix boot-time Embedded Controller GPE storm caused by incorrect resource assignment after ACPI Bus Check Notification (Mika Westerberg) - Protect pci_reassign_bridge_resources() against concurrent addition/removal (Benjamin Herrenschmidt) - Fix bridge dma_ranges resource list cleanup (Rob Herring) - Add "pci=hpmmiosize" and "pci=hpmmioprefsize" parameters to control the MMIO and prefetchable MMIO window sizes of hotplug bridges independently (Nicholas Johnson) - Fix MMIO/MMIO_PREF window assignment that assigned more space than desired (Nicholas Johnson) - Only enforce bus numbers from bridge EA if the bridge has EA devices downstream (Subbaraya Sundeep) - Consolidate DT "dma-ranges" parsing and convert all host drivers to use shared parsing (Rob Herring) Error reporting: - Restore AER capability after resume (Mayurkumar Patel) - Add PoisonTLPBlocked AER counter (Rajat Jain) - Use for_each_set_bit() to simplify AER code (Andy Shevchenko) - Fix AER kernel-doc (Andy Shevchenko) - Add "pcie_ports=dpc-native" parameter to allow native use of DPC even if platform didn't grant control over AER (Olof Johansson) Hotplug: - Avoid returning prematurely from sysfs requests to enable or disable a PCIe hotplug slot (Lukas Wunner) - Don't disable interrupts twice when suspending hotplug ports (Mika Westerberg) - Fix deadlocks when PCIe ports are hot-removed while suspended (Mika Westerberg) Power management: - Remove unnecessary ASPM locking (Bjorn Helgaas) - Add support for disabling L1 PM Substates (Heiner Kallweit) - Allow re-enabling Clock PM after it has been disabled (Heiner Kallweit) - Add sysfs attributes for controlling ASPM link states (Heiner Kallweit) - Remove CONFIG_PCIEASPM_DEBUG, including "link_state" and "clk_ctl" sysfs files (Heiner Kallweit) - Avoid AMD FCH XHCI USB PME# from D0 defect that prevents wakeup on USB 2.0 or 1.1 connect events (Kai-Heng Feng) - Move power state check out of pci_msi_supported() (Bjorn Helgaas) - Fix incorrect MSI-X masking on resume and revert related nvme quirk for Kingston NVME SSD running FW E8FK11.T (Jian-Hong Pan) - Always return devices to D0 when thawing to fix hibernation with drivers like mlx4 that used legacy power management (previously we only did it for drivers with new power management ops) (Dexuan Cui) - Clear PCIe PME Status even for legacy power management (Bjorn Helgaas) - Fix PCI PM documentation errors (Bjorn Helgaas) - Use dev_printk() for more power management messages (Bjorn Helgaas) - Apply D2 delay as milliseconds, not microseconds (Bjorn Helgaas) - Convert xen-platform from legacy to generic power management (Bjorn Helgaas) - Removed unused .resume_early() and .suspend_late() legacy power management hooks (Bjorn Helgaas) - Rearrange power management code for clarity (Rafael J. Wysocki) - Decode power states more clearly ("4" or "D4" really refers to "D3cold") (Bjorn Helgaas) - Notice when reading PM Control register returns an error (~0) instead of interpreting it as being in D3hot (Bjorn Helgaas) - Add missing link delays required by the PCIe spec (Mika Westerberg) Virtualization: - Move pci_prg_resp_pasid_required() to CONFIG_PCI_PRI (Bjorn Helgaas) - Allow VFs to use PRI (the PF PRI is shared by the VFs, but the code previously didn't recognize that) (Kuppuswamy Sathyanarayanan) - Allow VFs to use PASID (the PF PASID capability is shared by the VFs, but the code previously didn't recognize that) (Kuppuswamy Sathyanarayanan) - Disconnect PF and VF ATS enablement, since ATS in PFs and associated VFs can be enabled independently (Kuppuswamy Sathyanarayanan) - Cache PRI and PASID capability offsets (Kuppuswamy Sathyanarayanan) - Cache the PRI PRG Response PASID Required bit (Bjorn Helgaas) - Consolidate ATS declarations in linux/pci-ats.h (Krzysztof Wilczynski) - Remove unused PRI and PASID stubs (Bjorn Helgaas) - Removed unnecessary EXPORT_SYMBOL_GPL() from ATS, PRI, and PASID interfaces that are only used by built-in IOMMU drivers (Bjorn Helgaas) - Hide PRI and PASID state restoration functions used only inside the PCI core (Bjorn Helgaas) - Add a DMA alias quirk for the Intel VCA NTB (Slawomir Pawlowski) - Serialize sysfs sriov_numvfs reads vs writes (Pierre Crégut) - Update Cavium ACS quirk for ThunderX2 and ThunderX3 (George Cherian) - Fix the UPDCR register address in the Intel ACS quirk (Steffen Liebergeld) - Unify ACS quirk implementations (Bjorn Helgaas) Amlogic Meson host bridge driver: - Fix meson PERST# GPIO polarity problem (Remi Pommarel) - Add DT bindings for Amlogic Meson G12A (Neil Armstrong) - Fix meson clock names to match DT bindings (Neil Armstrong) - Add meson support for Amlogic G12A SoC with separate shared PHY (Neil Armstrong) - Add meson extended PCIe PHY functions for Amlogic G12A USB3+PCIe combo PHY (Neil Armstrong) - Add arm64 DT for Amlogic G12A PCIe controller node (Neil Armstrong) - Add commented-out description of VIM3 USB3/PCIe mux in arm64 DT (Neil Armstrong) Broadcom iProc host bridge driver: - Invalidate iProc PAXB address mapping before programming it (Abhishek Shah) - Fix iproc-msi and mvebu __iomem annotations (Ben Dooks) Cadence host bridge driver: - Refactor Cadence PCIe host controller to use as a library for both host and endpoint (Tom Joseph) Freescale Layerscape host bridge driver: - Add layerscape LS1028a support (Xiaowei Bao) Intel VMD host bridge driver: - Add VMD bus 224-255 restriction decode (Jon Derrick) - Add VMD 8086:9A0B device ID (Jon Derrick) - Remove Keith from VMD maintainer list (Keith Busch) Marvell ARMADA 3700 / Aardvark host bridge driver: - Use LTSSM state to build link training flag since Aardvark doesn't implement the Link Training bit (Remi Pommarel) - Delay before training Aardvark link in case PERST# was asserted before the driver probe (Remi Pommarel) - Fix Aardvark issues with Root Control reads and writes (Remi Pommarel) - Don't rely on jiffies in Aardvark config access path since interrupts may be disabled (Remi Pommarel) - Fix Aardvark big-endian support (Grzegorz Jaszczyk) Marvell ARMADA 370 / XP host bridge driver: - Make mvebu_pci_bridge_emul_ops static (Ben Dooks) Microsoft Hyper-V host bridge driver: - Add hibernation support for Hyper-V virtual PCI devices (Dexuan Cui) - Track Hyper-V pci_protocol_version per-hbus, not globally (Dexuan Cui) - Avoid kmemleak false positive on hv hbus buffer (Dexuan Cui) Mobiveil host bridge driver: - Change mobiveil csr_read()/write() function names that conflict with riscv arch functions (Kefeng Wang) NVIDIA Tegra host bridge driver: - Fix Tegra CLKREQ dependency programming (Vidya Sagar) Renesas R-Car host bridge driver: - Remove unnecessary header include from rcar (Andrew Murray) - Tighten register index checking for rcar inbound range programming (Marek Vasut) - Fix rcar inbound range alignment calculation to improve packing of multiple entries (Marek Vasut) - Update rcar MACCTLR setting to match documentation (Yoshihiro Shimoda) - Clear bit 0 of MACCTLR before PCIETCTLR.CFINIT per manual (Yoshihiro Shimoda) - Add Marek Vasut and Yoshihiro Shimoda as R-Car maintainers (Simon Horman) Rockchip host bridge driver: - Make rockchip 0V9 and 1V8 power regulators non-optional (Robin Murphy) Socionext UniPhier host bridge driver: - Set uniphier to host (RC) mode always (Kunihiko Hayashi) Endpoint drivers: - Fix endpoint driver sign extension problem when shifting page number to phys_addr_t (Alan Mikhak) Misc: - Add NumaChip SPDX header (Krzysztof Wilczynski) - Replace EXTRA_CFLAGS with ccflags-y (Krzysztof Wilczynski) - Remove unused includes (Krzysztof Wilczynski) - Removed unused sysfs attribute groups (Ben Dooks) - Remove PTM and ASPM dependencies on PCIEPORTBUS (Bjorn Helgaas) - Add PCIe Link Control 2 register field definitions to replace magic numbers in AMDGPU and Radeon CIK/SI (Bjorn Helgaas) - Fix incorrect Link Control 2 Transmit Margin usage in AMDGPU and Radeon CIK/SI PCIe Gen3 link training (Bjorn Helgaas) - Use pcie_capability_read_word() instead of pci_read_config_word() in AMDGPU and Radeon CIK/SI (Frederick Lawler) - Remove unused pci_irq_get_node() Greg Kroah-Hartman) - Make asm/msi.h mandatory and simplify PCI_MSI_IRQ_DOMAIN Kconfig (Palmer Dabbelt, Michal Simek) - Read all 64 bits of Switchtec part_event_bitmap (Logan Gunthorpe) - Fix erroneous intel-iommu dependency on CONFIG_AMD_IOMMU (Bjorn Helgaas) - Fix bridge emulation big-endian support (Grzegorz Jaszczyk) - Fix dwc find_next_bit() usage (Niklas Cassel) - Fix pcitest.c fd leak (Hewenliang) - Fix typos and comments (Bjorn Helgaas) - Fix Kconfig whitespace errors (Krzysztof Kozlowski)" * tag 'pci-v5.5-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (160 commits) PCI: Remove PCI_MSI_IRQ_DOMAIN architecture whitelist asm-generic: Make msi.h a mandatory include/asm header Revert "nvme: Add quirk for Kingston NVME SSD running FW E8FK11.T" PCI/MSI: Fix incorrect MSI-X masking on resume PCI/MSI: Move power state check out of pci_msi_supported() PCI/MSI: Remove unused pci_irq_get_node() PCI: hv: Avoid a kmemleak false positive caused by the hbus buffer PCI: hv: Change pci_protocol_version to per-hbus PCI: hv: Add hibernation support PCI: hv: Reorganize the code in preparation of hibernation MAINTAINERS: Remove Keith from VMD maintainer PCI/ASPM: Remove PCIEASPM_DEBUG Kconfig option and related code PCI/ASPM: Add sysfs attributes for controlling ASPM link states PCI: Fix indentation drm/radeon: Prefer pcie_capability_read_word() drm/radeon: Replace numbers with PCI_EXP_LNKCTL2 definitions drm/radeon: Correct Transmit Margin masks drm/amdgpu: Prefer pcie_capability_read_word() PCI: uniphier: Set mode register to host mode drm/amdgpu: Replace numbers with PCI_EXP_LNKCTL2 definitions ...
| * PCI/PM: Remove unused pci_driver.suspend_late() hookBjorn Helgaas2019-11-201-5/+5
| | | | | | | | | | | | | | | | | | The struct pci_driver.suspend_late() hook is one of the legacy PCI power management callbacks, and there are no remaining users of it. Remove it. Link: https://lore.kernel.org/r/20191101204558.210235-7-helgaas@kernel.org Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| * PCI/PM: Remove unused pci_driver.resume_early() hookBjorn Helgaas2019-11-201-1/+1
| | | | | | | | | | | | | | | | | | The struct pci_driver.resume_early() hook is one of the legacy PCI power management callbacks, and there are no remaining users of it. Remove it. Link: https://lore.kernel.org/r/20191101204558.210235-6-helgaas@kernel.org Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| * PCI/PM: Wrap long lines in documentationBjorn Helgaas2019-11-201-14/+14
| | | | | | | | | | | | | | | | | | | | Documentation/power/pci.rst is wrapped to fit in 80 columns, but directory structure changes made a few lines longer. Wrap them so they all fit in 80 columns again. Link: https://lore.kernel.org/r/20191014230016.240912-7-helgaas@kernel.org Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| * PCI/PM: Note that PME can be generated from D0Bjorn Helgaas2019-11-201-2/+2
| | | | | | | | | | | | | | | | | | Per PCIe r5.0 sec 7.5.2.1, PME may be generated from D0, so update Documentation/power/pci.rst to reflect that. Link: https://lore.kernel.org/r/20191016194450.68959-1-helgaas@kernel.org Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| * PCI/PM: Correct pci_pm_thaw_noirq() documentationBjorn Helgaas2019-11-201-5/+5
| | | | | | | | | | | | | | | | | | | | According to the documentation, pci_pm_thaw_noirq() did not put the device into the full-power state and restore its standard configuration registers. This is incorrect, so update the documentation to match the code. Link: https://lore.kernel.org/r/20191014230016.240912-3-helgaas@kernel.org Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* | PM: Wrap documentation to fit in 80 columnsBjorn Helgaas2019-11-208-74/+81
|/ | | | | | | | Wrap to 80 columns. No textual change except to correct some "it's" that should be "its". Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
*-. Merge branches 'pm-opp', 'pm-qos', 'acpi-pm', 'pm-domains' and 'pm-tools'Rafael J. Wysocki2019-09-172-4/+3
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * pm-opp: PM / OPP: Correct Documentation about library location opp: of: Support multiple suspend OPPs defined in DT dt-bindings: opp: Support multiple opp-suspend properties opp: core: add regulators enable and disable opp: Don't decrement uninitialized list_kref * pm-qos: PM: QoS: Get rid of unused flags * acpi-pm: ACPI: PM: Print debug messages on device power state changes * pm-domains: PM / Domains: Verify PM domain type in dev_pm_genpd_set_performance_state() PM / Domains: Simplify genpd_lookup_dev() PM / Domains: Align in-parameter names for some genpd functions * pm-tools: pm-graph: make setVal unbuffered again for python2 and python3 cpupower: update German translation tools/power/cpupower: fix 64bit detection when cross-compiling cpupower: Add missing newline at end of file pm-graph v5.5
| | * PM: QoS: Get rid of unused flagsAmit Kucheria2019-08-211-3/+2
| |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The network_latency and network_throughput flags for PM-QoS have not found much use in drivers or in userspace since they were introduced. Commit 4a733ef1bea7 ("mac80211: remove PM-QoS listener") removed the only user PM_QOS_NETWORK_LATENCY in the kernel a while ago and there don't seem to be any userspace tools using the character device files either. PM_QOS_MEMORY_BANDWIDTH was never even added to the trace events. Remove all the flags except cpu_dma_latency. Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| * Merge branch 'opp/linux-next' of ↵Rafael J. Wysocki2019-09-051-1/+1
|/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm Pull operating performance points (OPP) framework changes for 5.4 from Viresh Kumar: "This contains: - OPP core fixes to better support genpd devices (Viresh Kumar). - OPP core changes to support multiple suspend-opps in DT (Anson Huang). - New OPP API (dev_pm_opp_find_level_exact()) and Qcom OPP binding changes for CPR (Niklas Cassel). - Qcom minor update (Sricharan R). - OPP Documentation fix (Yue Hu). - OPP core support to enable/disable regulators (k.konieczny)." * 'opp/linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm: dt-bindings: opp: Add qcom-opp bindings with properties needed for CPR dt-bindings: opp: qcom-nvmem: Support pstates provided by a power domain dt-bindings: opp: qcom-nvmem: Make speedbin related properties optional dt-bindings: opp: Re-organise kryo cpufreq to use it for other nvmem based qcom socs PM / OPP: Correct Documentation about library location opp: of: Support multiple suspend OPPs defined in DT dt-bindings: opp: Support multiple opp-suspend properties opp: core: add regulators enable and disable opp: Don't decrement uninitialized list_kref opp: Add dev_pm_opp_find_level_exact() opp: Return genpd virtual devices from dev_pm_opp_attach_genpd() opp: Not all power-domains are scalable
| * PM / OPP: Correct Documentation about library locationYue Hu2019-07-261-1/+1
| | | | | | | | | | | | | | OPP library is now located in drivers/opp/ directory. Signed-off-by: Yue Hu <huyue2@yulong.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
* | Merge branch 'pdf_fixes_v1' of https://git.linuxtv.org/mchehab/experimental ↵Jonathan Corbet2019-07-221-1/+1
|\ \ | |/ |/| | | | | | | into mauro Bring in a set of post-thrashup fixes from Mauro.
| * docs: power: add it to to the main documentation indexMauro Carvalho Chehab2019-07-171-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The power docs are orphaned at the documentation body. While it could likely be moved to be inside some guide, I'm opting to just adding it to the main index.rst, removing the :orphan: and adding the SPDX header. The reason is similar to what it was done for other driver-specific subsystems: the docs there contain a mix of Kernelspace, uAPI and admin-guide. So, better to keep them on its own directory, while the docs there are not properly classified. Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
* | Merge tag 'pm-5.3-rc1-2' of ↵Linus Torvalds2019-07-181-5/+7
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull more power management updates from Rafael Wysocki: "These modify the Intel RAPL driver to allow it to use an MMIO interface to the hardware, make the int340X thermal driver provide such an interface for it, add Intel Ice Lake CPU IDs to the RAPL driver (these changes depend on the previously merged x86 arch changes), update cpufreq to use the PM QoS framework for managing the min and max frequency limits, and add update the imx-cpufreq-dt cpufreq driver to support i.MX8MN. Specifics: - Add MMIO interface support to the Intel RAPL power capping driver and update the int340X thermal driver to provide a RAPL MMIO interface (Zhang Rui, Stephen Rothwell). - Add Intel Ice Lake CPU IDs to the RAPL driver (Zhang Rui, Rajneesh Bhardwaj). - Make cpufreq use the PM QoS framework (instead of notifiers) for managing the min and max frequency constraints (Viresh Kumar). - Add i.MX8MN support to the imx-cpufreq-dt cpufreq driver (Anson Huang)" * tag 'pm-5.3-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (27 commits) cpufreq: Make cpufreq_generic_init() return void intel_rapl: need linux/cpuhotplug.h for enum cpuhp_state powercap/rapl: Add Ice Lake NNPI support to RAPL driver powercap/intel_rapl: add support for ICX-D powercap/intel_rapl: add support for ICX powercap/intel_rapl: add support for IceLake desktop intel_rapl: Fix module autoloading issue int340X/processor_thermal_device: add support for MMIO RAPL intel_rapl: support two power limits for every RAPL domain intel_rapl: support 64 bit register intel_rapl: abstract RAPL common code intel_rapl: cleanup hardcoded MSR access intel_rapl: cleanup some functions intel_rapl: abstract register access operations intel_rapl: abstract register address intel_rapl: introduce struct rapl_if_private intel_rapl: introduce intel_rapl.h intel_rapl: remove hardcoded register index intel_rapl: use reg instead of msr cpufreq: imx-cpufreq-dt: Add i.MX8MN support ...
| * PM / QOS: Pass request type to dev_pm_qos_read_value()Viresh Kumar2019-07-041-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | In order to allow dev_pm_qos_read_value() to read values for different QoS requests, pass request type as a parameter to these routines. For now, it only supports resume-latency request type but will be extended to frequency limit (min/max) constraints later on. Reviewed-by: Matthias Kaehlcke <mka@chromium.org> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| * PM / QOS: Pass request type to dev_pm_qos_{add|remove}_notifier()Viresh Kumar2019-07-041-4/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In order to use the same set of routines to register notifiers for different request types, update the existing dev_pm_qos_{add|remove}_notifier() routines with an additional parameter: request-type. For now, it only supports resume-latency request type but will be extended to frequency limit (min/max) constraints later on. Reviewed-by: Matthias Kaehlcke <mka@chromium.org> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* | Merge tag 'for-v5.3' of ↵Linus Torvalds2019-07-151-0/+6
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply Pull power supply and reset updates from Sebastian Reichel: "Core: - add HWMON compat layer - new properties: - input power limit - input voltage limit Drivers: - qcom-pon: add gen2 support - new driver for storing reboot move in NVMEM - new driver for Wilco EC charger configuration - simplify getting the adapter of a client" * tag 'for-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply: power: reset: nvmem-reboot-mode: add CONFIG_OF dependency power_supply: wilco_ec: Add charging config driver power: supply: cros: allow to set input voltage and current limit power: supply: add input power and voltage limit properties power: supply: fix semicolon.cocci warnings power: reset: nvmem-reboot-mode: use NVMEM as reboot mode write interface dt-bindings: power: reset: add document for NVMEM based reboot-mode reset: qcom-pon: Add support for gen2 pon dt-bindings: power: reset: qcom: Add qcom,pm8998-pon compatibility line power: supply: Add HWMON compatibility layer power: supply: sbs-manager: simplify getting the adapter of a client power: supply: rt9455_charger: simplify getting the adapter of a client power: supply: rt5033_battery: simplify getting the adapter of a client power: supply: max17042_battery: simplify getting the adapter of a client power: supply: max17040_battery: simplify getting the adapter of a client power: supply: max14656_charger_detector: simplify getting the adapter of a client power: supply: bq25890_charger: simplify getting the adapter of a client power: supply: bq24257_charger: simplify getting the adapter of a client power: supply: bq24190_charger: simplify getting the adapter of a client
| * | power: supply: add input power and voltage limit propertiesEnric Balletbo i Serra2019-06-281-0/+4
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For thermal management strategy you might be interested on limit the input power for a power supply. We already have current limit but basically what we probably want is to limit power. So, introduce the input_power_limit property. Although the common use case is limit the input power, in some specific cases it is the voltage that is problematic (i.e some regulators have different efficiencies at higher voltage resulting in more heat). So introduce also the input_voltage_limit property. This happens in one Chromebook and is used on the Pixel C's thermal management strategy to effectively limit the input power to 5V 3A when the screen is on. When the screen is on, the display, the CPU, and the GPU all contribute more heat to the system than while the screen is off, and we made a tradeoff to throttle the charger in order to give more of the thermal budget to those other components. So there's nothing fundamentally broken about the hardware that would cause the Pixel C to malfunction if we were charging at 9V or 12V instead of 5V when the screen is on, i.e. if userspace doesn't change this. What would happen is that you wouldn't meet Google's skin temperature targets on the system if the charger was allowed to run at 9V or 12V with the screen on. For folks hacking on Pixel Cs (which is now outside of Google's official support window for Android) and customizing their own kernel and userspace this would be acceptable, but we wanted to expose this feature in the power supply properties because the feature does exist in the Emedded Controller firmware of the Pixel C and all of Google's Chromebooks with USB-C made since 2015 in case someone running an up to date kernel wanted to limit the charging power for thermal or other reasons. This patch exposes a new property, similar to input current limit, to re-configure the maximum voltage from the external supply at runtime based on system-level knowledge or user input. Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> Reviewed-by: Guenter Roeck <groeck@chromium.org> Acked-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com> Reviewed-by: Benson Leung <bleung@chromium.org> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
* / docs: power: convert docs to ReST and rename to *.rstMauro Carvalho Chehab2019-06-1432-1683/+2104
|/ | | | | | | | | | | | | | | | | | | | Convert the PM documents to ReST, in order to allow them to build with Sphinx. The conversion is actually: - add blank lines and indentation in order to identify paragraphs; - fix tables markups; - add some lists markups; - mark literal blocks; - adjust title markups. At its new index.rst, let's add a :orphan: while this is not linked to the main index.rst file, in order to avoid build warnings. Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Mark Brown <broonie@kernel.org> Acked-by: Srivatsa S. Bhat (VMware) <srivatsa@csail.mit.edu>
* PM/EM: Document the Energy Model frameworkQuentin Perret2019-01-271-0/+144
| | | | | | | | | | | | | | | | | | | Introduce a documentation file summarizing the key design points and APIs of the newly introduced Energy Model framework. Signed-off-by: Quentin Perret <quentin.perret@arm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: corbet@lwn.net Cc: dietmar.eggemann@arm.com Cc: morten.rasmussen@arm.com Cc: patrick.bellasi@arm.com Cc: qais.yousef@arm.com Cc: rjw@rjwysocki.net Link: https://lkml.kernel.org/r/20190110110546.8101-2-quentin.perret@arm.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* Documentation: Use "while" instead of "whilst"Will Deacon2018-11-201-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | Whilst making an unrelated change to some Documentation, Linus sayeth: | Afaik, even in Britain, "whilst" is unusual and considered more | formal, and "while" is the common word. | | [...] | | Can we just admit that we work with computers, and we don't need to | use þe eald Englisc spelling of words that most of the world never | uses? dictionary.com refers to the word as "Chiefly British", which is probably an undesirable attribute for technical documentation. Replace all occurrences under Documentation/ with "while". Cc: David Howells <dhowells@redhat.com> Cc: Liam Girdwood <lgirdwood@gmail.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Michael Halcrow <mhalcrow@google.com> Cc: Jonathan Corbet <corbet@lwn.net> Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* Merge tag 'docs-4.20' of git://git.lwn.net/linuxLinus Torvalds2018-10-241-44/+0
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull documentation updates from Jonathan Corbet: "This is a fairly typical cycle for documentation. There's some welcome readability improvements for the formatted output, some LICENSES updates including the addition of the ISC license, the removal of the unloved and unmaintained 00-INDEX files, the deprecated APIs document from Kees, more MM docs from Mike Rapoport, and the usual pile of typo fixes and corrections" * tag 'docs-4.20' of git://git.lwn.net/linux: (41 commits) docs: Fix typos in histogram.rst docs: Introduce deprecated APIs list kernel-doc: fix declaration type determination doc: fix a typo in adding-syscalls.rst docs/admin-guide: memory-hotplug: remove table of contents doc: printk-formats: Remove bogus kobject references for device nodes Documentation: preempt-locking: Use better example dm flakey: Document "error_writes" feature docs/completion.txt: Fix a couple of punctuation nits LICENSES: Add ISC license text LICENSES: Add note to CDDL-1.0 license that it should not be used docs/core-api: memory-hotplug: add some details about locking internals docs/core-api: rename memory-hotplug-notifier to memory-hotplug docs: improve readability for people with poorer eyesight yama: clarify ptrace_scope=2 in Yama documentation docs/vm: split memory hotplug notifier description to Documentation/core-api docs: move memory hotplug description into admin-guide/mm doc: Fix acronym "FEKEK" in ecryptfs docs: fix some broken documentation references iommu: Fix passthrough option documentation ...
| * Drop all 00-INDEX files from Documentation/Henrik Austad2018-09-091-44/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a respin with a wider audience (all that get_maintainer returned) and I know this spams a *lot* of people. Not sure what would be the correct way, so my apologies for ruining your inbox. The 00-INDEX files are supposed to give a summary of all files present in a directory, but these files are horribly out of date and their usefulness is brought into question. Often a simple "ls" would reveal the same information as the filenames are generally quite descriptive as a short introduction to what the file covers (it should not surprise anyone what Documentation/sched/sched-design-CFS.txt covers) A few years back it was mentioned that these files were no longer really needed, and they have since then grown further out of date, so perhaps it is time to just throw them out. A short status yields the following _outdated_ 00-INDEX files, first counter is files listed in 00-INDEX but missing in the directory, last is files present but not listed in 00-INDEX. List of outdated 00-INDEX: Documentation: (4/10) Documentation/sysctl: (0/1) Documentation/timers: (1/0) Documentation/blockdev: (3/1) Documentation/w1/slaves: (0/1) Documentation/locking: (0/1) Documentation/devicetree: (0/5) Documentation/power: (1/1) Documentation/powerpc: (0/5) Documentation/arm: (1/0) Documentation/x86: (0/9) Documentation/x86/x86_64: (1/1) Documentation/scsi: (4/4) Documentation/filesystems: (2/9) Documentation/filesystems/nfs: (0/2) Documentation/cgroup-v1: (0/2) Documentation/kbuild: (0/4) Documentation/spi: (1/0) Documentation/virtual/kvm: (1/0) Documentation/scheduler: (0/2) Documentation/fb: (0/1) Documentation/block: (0/1) Documentation/networking: (6/37) Documentation/vm: (1/3) Then there are 364 subdirectories in Documentation/ with several files that are missing 00-INDEX alltogether (and another 120 with a single file and no 00-INDEX). I don't really have an opinion to whether or not we /should/ have 00-INDEX, but the above 00-INDEX should either be removed or be kept up to date. If we should keep the files, I can try to keep them updated, but I rather not if we just want to delete them anyway. As a starting point, remove all index-files and references to 00-INDEX and see where the discussion is going. Signed-off-by: Henrik Austad <henrik@austad.us> Acked-by: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Just-do-it-by: Steven Rostedt <rostedt@goodmis.org> Reviewed-by: Jens Axboe <axboe@kernel.dk> Acked-by: Paul Moore <paul@paul-moore.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Mark Brown <broonie@kernel.org> Acked-by: Mike Rapoport <rppt@linux.vnet.ibm.com> Cc: [Almost everybody else] Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | PM / hibernate: Documentation: fix image_size default valueVladimir D. Seleznev2018-09-101-1/+1
|/ | | | | | | | | | | | | | | This commit updates the default value of /sys/power/image_size in the documentation. Since ac5c24ec1e983313ef0015258fba6f630e54e7cn the `image_size' value is set to about 2/5 of RAM, according to kernel/power/snapshot.c: image_size = ((totalram_pages * 2) / 5) * PAGE_SIZE; but this change was not reflected everywhere in the documentation. Signed-off-by: Vladimir D. Seleznev <vseleznv@altlinux.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* PM / reboot: Eliminate race between reboot and suspendPingfan Liu2018-08-062-9/+9
| | | | | | | | | | | | | At present, "systemctl suspend" and "shutdown" can run in parrallel. A system can suspend after devices_shutdown(), and resume. Then the shutdown task goes on to power off. This causes many devices are not really shut off. Hence replacing reboot_mutex with system_transition_mutex (renamed from pm_mutex) to achieve the exclusion. The renaming of pm_mutex as system_transition_mutex can be better to reflect the purpose of the mutex. Signed-off-by: Pingfan Liu <kernelfans@gmail.com> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* firmware: Fix firmware documentation for recent file renamesHans de Goede2018-04-231-1/+1
| | | | | | | | | | | firmware_class.c was split into several files under drivers/base/firmware_loader. The new main.c has the functions which /request_firmware.rst references. Acked-by: Luis R. Rodriguez <mcgrof@kernel.org> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Tested-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* PM / hibernate: Make passing hibernate offsets more friendlyMario Limonciello2018-03-301-1/+9
| | | | | | | | | | | | Currently the only way to specify a hibernate offset for a swap file is on the kernel command line. Add a new /sys/power/resume_offset that lets userspace specify the offset and disk to use when initiating a hibernate cycle. Signed-off-by: Mario Limonciello <mario.limonciello@dell.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* Merge tag 'regulator-v4.16' of ↵Linus Torvalds2018-01-291-20/+16
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator Pull regulator updates from Mark Brown: "This is a quiet release in terms of code volume but a fairly big one in terms of framework changes - we've got one long awaited feature in the form of runtime configuration of suspend and the start of coupled regulator support too: - Support for modifying the voltage and enable configuration devices will have in suspend, contributed by Chunyan Zhang. - Support for the Spreadtrum SC2731, contributed by Erick Chen. - The start of changes to support coupled regulators from Maciej Purski, the rest of the series should arrive for v4.17" * tag 'regulator-v4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator: regulator: Fix build error regulator: core: Refactor regulator_list_voltage() regulator: core: Move of_find_regulator_by_node() to of_regulator.c regulator: add PM suspend and resume hooks regulator: empty the old suspend functions regulator: leave one item to record whether regulator is enabled regulator: make regulator voltage be an array to support more states regulator: added support for suspend states regulator: qcom_spmi: Use regmap helpers for enable/disable/is_enabled callback regulator: sc2731: Fix defines for SC2731_WR_UNLOCK and SC2731_PWR_WR_PROT_VALUE regulator: fix incorrect indentation of two assignment statements regulator: sc2731: Add regulator driver to support Spreadtrum SC2731 PMIC regulator: Add Spreadtrum SC2731 regulator documentation regulator: Update code examples in documentation MAINTAINERS: regulator: Add Documentation/power/regulator/ regulator: tps65218: Add NULL test for devm_kzalloc call regulator: tps65218: Remove unused enum tps65218_regulators
| * regulator: Update code examples in documentationJonathan Neuschäfer2017-11-291-20/+16
| | | | | | | | | | | | | | | | This involves using the REGULATOR_SUPPLY initializer macro and reindenting some of the code. Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Signed-off-by: Mark Brown <broonie@kernel.org>
* | PCI / PM: Support for LEAVE_SUSPENDED driver flagRafael J. Wysocki2017-11-271-0/+11
|/ | | | | | | | | | | | | Add support for DPM_FLAG_LEAVE_SUSPENDED to the PCI bus type by making it (a) set the power.may_skip_resume status bit for devices that, from its perspective, may be left in suspend after system wakeup from sleep and (b) return early from pci_pm_resume_noirq() for devices whose remaining resume callbacks during the transition under way are going to be skipped by the PM core. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Bjorn Helgaas <bhelgaas@google.com>
* PM / runtime: Drop children check from __pm_runtime_set_status()Rafael J. Wysocki2017-11-161-2/+1
| | | | | | | | | | | | | | | | | | | | The check for "active" children in __pm_runtime_set_status(), when trying to set the parent device status to "suspended", doesn't really make sense, because in fact it is not invalid to set the status of a device with runtime PM disabled to "suspended" in any case. It is invalid to enable runtime PM for a device with its status set to "suspended" while its child_count reference counter is nonzero, but the check in __pm_runtime_set_status() doesn't really cover that situation. For this reason, drop the children check from __pm_runtime_set_status() and add a check against child_count reference counters of "suspended" devices to pm_runtime_enable(). Fixes: a8636c89648a (PM / Runtime: Don't allow to suspend a device with an active child) Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Johan Hovold <johan@kernel.org>
* Merge tag 'pm-4.15-rc1' of ↵Linus Torvalds2017-11-132-7/+39
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull power management updates from Rafael Wysocki: "There are no real big ticket items here this time. The most noticeable change is probably the relocation of the OPP (Operating Performance Points) framework to its own directory under drivers/ as it has grown big enough for that. Also Viresh is now going to maintain it and send pull requests for it to me, so you will see this change in the git history going forward (but still not right now). Another noticeable set of changes is the modifications of the PM core, the PCI subsystem and the ACPI PM domain to allow of more integration between system-wide suspend/resume and runtime PM. For now it's just a way to avoid resuming devices from runtime suspend unnecessarily during system suspend (if the driver sets a flag to indicate its readiness for that) and in the works is an analogous mechanism to allow devices to stay suspended after system resume. In addition to that, we have some changes related to supporting frequency-invariant CPU utilization metrics in the scheduler and in the schedutil cpufreq governor on ARM and changes to add support for device performance states to the generic power domains (genpd) framework. The rest is mostly fixes and cleanups of various sorts. Specifics: - Relocate the OPP (Operating Performance Points) framework to its own directory under drivers/ and add support for power domain performance states to it (Viresh Kumar). - Modify the PM core, the PCI bus type and the ACPI PM domain to support power management driver flags allowing device drivers to specify their capabilities and preferences regarding the handling of devices with enabled runtime PM during system suspend/resume and clean up that code somewhat (Rafael Wysocki, Ulf Hansson). - Add frequency-invariant accounting support to the task scheduler on ARM and ARM64 (Dietmar Eggemann). - Fix PM QoS device resume latency framework to prevent "no restriction" requests from overriding requests with specific requirements and drop the confusing PM_QOS_FLAG_REMOTE_WAKEUP device PM QoS flag (Rafael Wysocki). - Drop legacy class suspend/resume operations from the PM core and drop legacy bus type suspend and resume callbacks from ARM/locomo (Rafael Wysocki). - Add min/max frequency support to devfreq and clean it up somewhat (Chanwoo Choi). - Rework wakeup support in the generic power domains (genpd) framework and update some of its users accordingly (Geert Uytterhoeven). - Convert timers in the PM core to use timer_setup() (Kees Cook). - Add support for exposing the SLP_S0 (Low Power S0 Idle) residency counter based on the LPIT ACPI table on Intel platforms (Srinivas Pandruvada). - Add per-CPU PM QoS resume latency support to the ladder cpuidle governor (Ramesh Thomas). - Fix a deadlock between the wakeup notify handler and the notifier removal in the ACPI core (Ville Syrjälä). - Fix a cpufreq schedutil governor issue causing it to use stale cached frequency values sometimes (Viresh Kumar). - Fix an issue in the system suspend core support code causing wakeup events detection to fail in some cases (Rajat Jain). - Fix the generic power domains (genpd) framework to prevent the PM core from using the direct-complete optimization with it as that is guaranteed to fail (Ulf Hansson). - Fix a minor issue in the cpuidle core and clean it up a bit (Gaurav Jindal, Nicholas Piggin). - Fix and clean up the intel_idle and ARM cpuidle drivers (Jason Baron, Len Brown, Leo Yan). - Fix a couple of minor issues in the OPP framework and clean it up (Arvind Yadav, Fabio Estevam, Sudeep Holla, Tobias Jordan). - Fix and clean up some cpufreq drivers and fix a minor issue in the cpufreq statistics code (Arvind Yadav, Bhumika Goyal, Fabio Estevam, Gautham Shenoy, Gustavo Silva, Marek Szyprowski, Masahiro Yamada, Robert Jarzmik, Zumeng Chen). - Fix minor issues in the system suspend and hibernation core, in power management documentation and in the AVS (Adaptive Voltage Scaling) framework (Helge Deller, Himanshu Jha, Joe Perches, Rafael Wysocki). - Fix some issues in the cpupower utility and document that Shuah Khan is going to maintain it going forward (Prarit Bhargava, Shuah Khan)" * tag 'pm-4.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (88 commits) tools/power/cpupower: add libcpupower.so.0.0.1 to .gitignore tools/power/cpupower: Add 64 bit library detection intel_idle: Graceful probe failure when MWAIT is disabled cpufreq: schedutil: Reset cached_raw_freq when not in sync with next_freq freezer: Fix typo in freezable_schedule_timeout() comment PM / s2idle: Clear the events_check_enabled flag cpufreq: stats: Handle the case when trans_table goes beyond PAGE_SIZE cpufreq: arm_big_little: make cpufreq_arm_bL_ops structures const cpufreq: arm_big_little: make function arguments and structure pointer const cpuidle: Avoid assignment in if () argument cpuidle: Clean up cpuidle_enable_device() error handling a bit ACPI / PM: Fix acpi_pm_notifier_lock vs flush_workqueue() deadlock PM / Domains: Fix genpd to deal with drivers returning 1 from ->prepare() cpuidle: ladder: Add per CPU PM QoS resume latency support PM / QoS: Fix device resume latency framework PM / domains: Rework governor code to be more consistent PM / Domains: Remove gpd_dev_ops.active_wakeup() callback soc: rockchip: power-domain: Use GENPD_FLAG_ACTIVE_WAKEUP soc: mediatek: Use GENPD_FLAG_ACTIVE_WAKEUP ARM: shmobile: pm-rmobile: Use GENPD_FLAG_ACTIVE_WAKEUP ...
| * PCI / PM: Take SMART_SUSPEND driver flag into accountRafael J. Wysocki2017-11-061-0/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make the PCI bus type take DPM_FLAG_SMART_SUSPEND into account in its system-wide PM callbacks and make sure that all code that should not run in parallel with pci_pm_runtime_resume() is executed in the "late" phases of system suspend, freeze and poweroff transitions. [Note that the pm_runtime_suspended() check in pci_dev_keep_suspended() is an optimization, because if is not passed, all of the subsequent checks may be skipped and some of them are much more overhead in general.] Also use the observation that if the device is in runtime suspend at the beginning of the "late" phase of a system-wide suspend-like transition, its state cannot change going forward (runtime PM is disabled for it at that time) until the transition is over and the subsequent system-wide PM callbacks should be skipped for it (as they generally assume the device to not be suspended), so add checks for that in pci_pm_suspend_late/noirq(), pci_pm_freeze_late/noirq() and pci_pm_poweroff_late/noirq(). Moreover, if pci_pm_resume_noirq() or pci_pm_restore_noirq() is called during the subsequent system-wide resume transition and if the device was left in runtime suspend previously, its runtime PM status needs to be changed to "active" as it is going to be put into the full-power state, so add checks for that too to these functions. In turn, if pci_pm_thaw_noirq() runs after the device has been left in runtime suspend, the subsequent "thaw" callbacks need to be skipped for it (as they may not work correctly with a suspended device), so set the power.direct_complete flag for the device then to make the PM core skip those callbacks. In addition to the above add a core helper for checking if DPM_FLAG_SMART_SUSPEND is set and the device runtime PM status is "suspended" at the same time, which is done quite often in the new code (and will be done elsewhere going forward too). Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Bjorn Helgaas <bhelgaas@google.com>
| * PM / core: Add NEVER_SKIP and SMART_PREPARE driver flagsRafael J. Wysocki2017-11-061-0/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The motivation for this change is to provide a way to work around a problem with the direct-complete mechanism used for avoiding system suspend/resume handling for devices in runtime suspend. The problem is that some middle layer code (the PCI bus type and the ACPI PM domain in particular) returns positive values from its system suspend ->prepare callbacks regardless of whether the driver's ->prepare returns a positive value or 0, which effectively prevents drivers from being able to control the direct-complete feature. Some drivers need that control, however, and the PCI bus type has grown its own flag to deal with this issue, but since it is not limited to PCI, it is better to address it by adding driver flags at the core level. To that end, add a driver_flags field to struct dev_pm_info for flags that can be set by device drivers at the probe time to inform the PM core and/or bus types, PM domains and so on on the capabilities and/or preferences of device drivers. Also add two static inline helpers for setting that field and testing it against a given set of flags and make the driver core clear it automatically on driver remove and probe failures. Define and document two PM driver flags related to the direct- complete feature: NEVER_SKIP and SMART_PREPARE that can be used, respectively, to indicate to the PM core that the direct-complete mechanism should never be used for the device and to inform the middle layer code (bus types, PM domains etc) that it can only request the PM core to use the direct-complete mechanism for the device (by returning a positive value from its ->prepare callback) if it also has been requested by the driver. While at it, make the core check pm_runtime_suspended() when setting power.direct_complete so that it doesn't need to be checked by ->prepare callbacks. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
| * PM / QoS: Drop PM_QOS_FLAG_REMOTE_WAKEUPRafael J. Wysocki2017-10-141-7/+6
| | | | | | | | | | | | | | | | | | | | | | The PM QoS flag PM_QOS_FLAG_REMOTE_WAKEUP is not used consistently and the vast majority of code simply assumes that remote wakeup should be enabled for devices in runtime suspend if they can generate wakeup signals, so drop it. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
* | Merge branch 'smp-hotplug-for-linus' of ↵Linus Torvalds2017-11-131-5/+4
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull smp/hotplug updates from Thomas Gleixner: "No functional changes, just removal of obsolete and outdated defines, macros and documentation" * 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: cpu/hotplug: Get rid of CPU hotplug notifier leftovers cpu/hotplug: Remove obsolete notifier macros
| * | cpu/hotplug: Get rid of CPU hotplug notifier leftoversThomas Gleixner2017-11-131-5/+4
| |/ | | | | | | | | | | | | The CPU hotplug notifiers are history. Remove the last reminders. Reported-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* | Documentation: fix ref to power basic-pm-debuggingTom Saeger2017-10-191-1/+1
| | | | | | | | | | | | Signed-off-by: Tom Saeger <tom.saeger@oracle.com> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | Documentation: fix admin-guide doc refsTom Saeger2017-10-121-1/+2
| | | | | | | | | | | | | | | | Make admin-guide document refs valid. Signed-off-by: Tom Saeger <tom.saeger@oracle.com> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | Documentation: fix driver-api doc refsTom Saeger2017-10-122-6/+6
|/ | | | | | | | Make driver-api document refs valid. Signed-off-by: Tom Saeger <tom.saeger@oracle.com> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* PM: docs: Delete the obsolete states.txt documentRafael J. Wysocki2017-08-291-127/+0
| | | | | | | The Documentation/power/states.txt document is now redundant and sonewhat outdated, so delete it. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* Merge branch 'pm-sleep' into pm-docsRafael J. Wysocki2017-08-291-1/+3
|\
| * ACPI / PM: Prefer suspend-to-idle over S3 on some systemsRafael J. Wysocki2017-08-051-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Modify the ACPI system sleep support setup code to select suspend-to-idle as the default system sleep state if (1) the ACPI_FADT_LOW_POWER_S0 flag is set in the FADT and (2) the Low Power Idle S0 _DSM interface has been discovered and (3) the default sleep state was not selected from the kernel command line. The main motivation for this change is that systems where the (1) and (2) conditions are met typically ship with OSes that don't exercise the S3 path in the platform firmware which remains untested and turns out to be non-functional at least in some cases. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Tested-by: Mario Limonciello <mario.limonciello@dell.com>
* | PM / runtime: Document new pm_runtime_set_suspended() constraintJohan Hovold2017-07-271-1/+2
|/ | | | | | | | | | | | | Since commit a8636c89648a (PM / Runtime: Don't allow to suspend a device with an active child) it is no longer permitted to set RPM_SUSPENDED state for a device with active children unless power.ignore_children is set. Update the documentation to reflect this. Signed-off-by: Johan Hovold <johan@kernel.org> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* Merge tag 'for-v4.13' of ↵Linus Torvalds2017-07-041-7/+24
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply Pull power supply and reset updates from Sebastian Reichel: "New drivers: - Linear ltc3651 charger driver - Motorola CPCAP battery fuel-gauge driver New chip/feature support: - bq27xxx: prepare for chip data setup - axp20x_battery: support max charge current setup New core features: - add Apple Brick ID type - support "supplied-from" device property for generic ACPI/pdata support - support strings for sysfs properties representing enums - introduce battery-info (backend is DT only for now) - provide reboot-mode header globally .. and misc fixes" * tag 'for-v4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply: (39 commits) power: supply: sbs-battery: Don't needlessly set CAPACITY_MODE power: supply: sbs-battery: Prevent CAPACITY_MODE races power: supply: bq24735: remove incorrect le16_to_cpu calls power: supply: sbs-battery: remove incorrect le16_to_cpu calls power: supply: cpcap-charger: Add missing power_supply_config power: supply: twl4030-charger: move allocation of iio channel to the beginning power: supply: twl4030-charger: allocate iio by devm_iio_channel_get() and fix error path power: supply: core: constify psy_tcd_ops. dt-bindings: power: supply: cpcap-battery: Add power-supplies property dt-bindings: power: supply: move max8903-charger.txt to proper location dt-bindings: power: supply: move maxim,max14656.txt to proper location power: supply: twl4030_charger: Use sysfs_match_string() helper power: reset: reboot-mode: Make include file global power: supply: axp20x_battery: add DT support for battery max constant charge current power: supply: axp20x_battery: add support for DT battery power: supply: bq27xxx: Add power_supply_battery_info support power: supply: bq27xxx: Add chip data memory read/write support power: supply: bq27xxx: Add bulk transfer bus methods dt-bindings: power: supply: bq27xxx: Add monitored-battery documentation power: supply: core: Add power_supply_prop_precharge ...
| * power: supply: core: Add power_supply_prop_prechargeLiam Breck2017-06-081-7/+12
| | | | | | | | | | | | | | | | Battery chargers use POWER_SUPPLY_PROP_PRECHARGE_CURRENT Clarify related item POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT Signed-off-by: Liam Breck <kernel@networkimprov.net> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
| * power: supply: core: Add power_supply_battery_info and APILiam Breck2017-06-081-0/+12
| | | | | | | | | | | | | | | | | | | | | | | | power_supply_get_battery_info() reads battery data from devicetree. struct power_supply_battery_info provides battery data to drivers. Its fields correspond to elements in enum power_supply_property. Drivers may surface battery data in sysfs via corresponding POWER_SUPPLY_PROP_* fields. Signed-off-by: Matt Ranostay <matt@ranostay.consulting> Signed-off-by: Liam Breck <kernel@networkimprov.net> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
* | PM / core: Drop run_wake flag from struct dev_pm_infoRafael J. Wysocki2017-06-281-5/+2
|/ | | | | | | | | | | | | | | | | | The run_wake flag in struct dev_pm_info is used to indicate whether or not the device is capable of generating remote wakeup signals at run time (or in the system working state), but the distinction between runtime remote wakeup and system wakeup signaling has always been rather artificial. The only practical reason for it to exist at the core level was that ACPI and PCI treated those two cases differently, but that's not the case any more after recent changes. For this reason, get rid of the run_wake flag and, when applicable, use device_set_wakeup_capable() and device_can_wakeup() instead of device_set_run_wake() and device_run_wake(), respectively. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com>
* Merge tag 'docs-4.12' of git://git.lwn.net/linuxLinus Torvalds2017-05-021-1/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull documentation update from Jonathan Corbet: "A reasonably busy cycle for documentation this time around. There is a new guide for user-space API documents, rather sparsely populated at the moment, but it's a start. Markus improved the infrastructure for converting diagrams. Mauro has converted much of the USB documentation over to RST. Plus the usual set of fixes, improvements, and tweaks. There's a bit more than the usual amount of reaching out of Documentation/ to fix comments elsewhere in the tree; I have acks for those where I could get them" * tag 'docs-4.12' of git://git.lwn.net/linux: (74 commits) docs: Fix a couple typos docs: Fix a spelling error in vfio-mediated-device.txt docs: Fix a spelling error in ioctl-number.txt MAINTAINERS: update file entry for HSI subsystem Documentation: allow installing man pages to a user defined directory Doc/PM: Sync with intel_powerclamp code behavior zr364xx.rst: usb/devices is now at /sys/kernel/debug/ usb.rst: move documentation from proc_usb_info.txt to USB ReST book convert philips.txt to ReST and add to media docs docs-rst: usb: update old usbfs-related documentation arm: Documentation: update a path name docs: process/4.Coding.rst: Fix a couple of document refs docs-rst: fix usb cross-references usb: gadget.h: be consistent at kernel doc macros usb: composite.h: fix two warnings when building docs usb: get rid of some ReST doc build errors usb.rst: get rid of some Sphinx errors usb/URB.txt: convert to ReST and update it usb/persist.txt: convert to ReST and add to driver-api book usb/hotplug.txt: convert to ReST and add to driver-api book ...
| * docs-rst: fix usb cross-referencesMauro Carvalho Chehab2017-04-111-1/+1
| | | | | | | | | | | | | | | | | | As some USB documentation files got moved, adjust their cross-references to their new place. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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