30120 Commits

Author SHA1 Message Date
Mark Brown
65fd5252b4 Merge remote-tracking branches 'asoc/topic/sta529', 'asoc/topic/sti', 'asoc/topic/stm', 'asoc/topic/sunxi' and 'asoc/topic/tas2552' into asoc-next 2017-04-30 22:16:31 +09:00
Mark Brown
ae17a14f14 Merge remote-tracking branches 'asoc/topic/samsung', 'asoc/topic/sgtl5000', 'asoc/topic/simple', 'asoc/topic/sirf' and 'asoc/topic/ssm4567' into asoc-next 2017-04-30 22:16:26 +09:00
Mark Brown
fc180c0eaf Merge remote-tracking branches 'asoc/topic/rockchip', 'asoc/topic/rt5514', 'asoc/topic/rt5645' and 'asoc/topic/rt5677' into asoc-next 2017-04-30 22:16:21 +09:00
Mark Brown
757fc30a1a Merge remote-tracking branches 'asoc/topic/nau8824', 'asoc/topic/omap', 'asoc/topic/pxa' and 'asoc/topic/qcom' into asoc-next 2017-04-30 22:16:18 +09:00
Mark Brown
ccf9fc86d6 Merge remote-tracking branches 'asoc/topic/max9878', 'asoc/topic/max98927', 'asoc/topic/mtk' and 'asoc/topic/nau8540' into asoc-next 2017-04-30 22:16:04 +09:00
Mark Brown
50946b2aec Merge remote-tracking branches 'asoc/topic/fsl-ssi', 'asoc/topic/hi6220' and 'asoc/topic/imx' into asoc-next 2017-04-30 22:16:01 +09:00
Mark Brown
0f57c12ab4 Merge remote-tracking branches 'asoc/topic/es7134', 'asoc/topic/es8328', 'asoc/topic/fsl', 'asoc/topic/fsl-asrc' and 'asoc/topic/fsl-esai' into asoc-next 2017-04-30 22:15:55 +09:00
Mark Brown
99dd3c53f6 Merge remote-tracking branches 'asoc/topic/cs35l35', 'asoc/topic/cs53l30', 'asoc/topic/da7213', 'asoc/topic/dio2125' and 'asoc/topic/dwc' into asoc-next 2017-04-30 22:15:50 +09:00
Viresh Kumar
e841cfc9ff PM / Domains: Fix DT example
The power-domain provider's #power-domain-cells field is set to 0 and
yet the children is using an index to point the power domain. Fix it by
removing the index field.

Fixes: 70bb510e4279 (dt/bindings / PM/Domains: Update binding for PM domain idle states)
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-04-28 23:19:12 +02:00
Rafael J. Wysocki
52e70c8af7 Merge branches 'acpi-power', 'acpi-blacklist', 'acpi-video' and 'acpi-doc'
* acpi-power:
  power: supply: axp288_charger: Only wait for INT3496 device if present
  ACPI / AC: Add a blacklist with PMIC ACPI HIDs with a native charger driver
  ACPI / battery: Add a blacklist with PMIC ACPI HIDs with a native battery driver
  ACPI / battery: Fix acpi_battery_exit on acpi_battery_init_async errors
  ACPI / utils: Add new acpi_dev_present helper

* acpi-blacklist:
  ACPI / blacklist: add _REV quirk for Dell Inspiron 7537

* acpi-video:
  ACPI / video: add comments about subtle cases
  ACPI / video: get rid of magic numbers and use enum instead

* acpi-doc:
  ACPI / doc: linuxized-acpica.txt: fix typos
2017-04-28 23:18:22 +02:00
Rafael J. Wysocki
131b3a8db2 Merge branches 'acpi-scan', 'acpi-tables' and 'acpi-platform'
* acpi-scan:
  ACPI / scan: Avoid enumerating devices more than once
  ACPI / scan: Apply default enumeration to devices with ACPI drivers
  ACPI / scan: Drop support for force_remove

* acpi-tables:
  ACPI / tables: Drop acpi_parse_entries() which is not used

* acpi-platform:
  ACPI / platform: Update platform device NUMA node based on _PXM method
2017-04-28 23:17:36 +02:00
Rafael J. Wysocki
060d0fbb43 Merge branches 'pm-cpuidle', 'pm-core', 'pm-domains', 'pm-avs' and 'pm-devfreq'
* pm-cpuidle:
  cpuidle: powernv: Avoid a branch in the core snooze_loop() loop
  cpuidle: powernv: Don't continually set thread priority in snooze_loop()
  cpuidle: powernv: Don't bounce between low and very low thread priority
  cpuidle: cpuidle-cps: remove unused variable
  powernv-cpuidle: Validate DT property array size

* pm-core:
  PM / runtime: Document autosuspend-helper side effects
  PM / runtime: Fix autosuspend documentation

* pm-domains:
  PM / Domains: Ignore domain-idle-states that are not compatible
  PM / Domains: Don't warn about IRQ safe device for an always on PM domain
  PM / Domains: Respect errors from genpd's ->power_off() callback
  PM / Domains: Enable users of genpd to specify always on PM domains
  PM / Domains: Clean up code validating genpd's status
  PM / Domain: remove conditional from error case

* pm-avs:
  PM / AVS: rockchip-io: add io selectors and supplies for rk3328

* pm-devfreq:
  PM / devfreq: Move struct devfreq_governor to devfreq directory
2017-04-28 23:15:34 +02:00
Jann Horn
bcb85c8876 KVM: Documentation: remove VM mmap documentation
Since commit 80f5b5e700fa9c ("KVM: remove vm mmap method"), the VM mmap
handler is gone. Remove the corresponding documentation.

Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-04-28 20:40:52 +02:00
Bjorn Helgaas
ef1b5dad5a Merge branch 'pci/virtualization' into next
* pci/virtualization:
  ixgbe: Use pcie_flr() instead of duplicating it
  IB/hfi1: Use pcie_flr() instead of duplicating it
  PCI: Call pcie_flr() from reset_chelsio_generic_dev()
  PCI: Call pcie_flr() from reset_intel_82599_sfp_virtfn()
  PCI: Export pcie_flr()
  PCI: Add sysfs sriov_drivers_autoprobe to control VF driver binding
  PCI: Avoid FLR for Intel 82579 NICs

Conflicts:
	include/linux/pci.h
2017-04-28 10:36:12 -05:00
Bjorn Helgaas
889e4dd916 Merge branch 'pci/resource-mmap' into next
* pci/resource-mmap:
  ia64: Use generic pci_mmap_resource_range()
  ia64: Remove redundant checks for WC in pci_mmap_page_range()
  ia64: Remove redundant valid_mmap_phys_addr_range() from pci_mmap_page_range()
  PCI: Add I/O BAR support to generic pci_mmap_resource_range()
  x86/PCI: Use generic pci_mmap_resource_range()
  unicore32/PCI: Use generic pci_mmap_resource_range()
  sh/PCI: Use generic pci_mmap_resource_range()
  parisc: Use generic pci_mmap_resource_range()
  mn10300/PCI: Use generic pci_mmap_resource_range()
  MIPS: PCI: Use generic pci_mmap_resource_range()
  cris/PCI: Use generic pci_mmap_resource_range()
  ARM/PCI: Use generic pci_mmap_resource_range()
  PCI: Add pci_mmap_resource_range() and use it for ARM64
  PCI: Add BAR index argument to pci_mmap_page_range()
  PCI: Use BAR index in sysfs attr->private instead of resource pointer
  PCI: Add arch_can_pci_mmap_io() on architectures which can mmap() I/O space
  PCI: Move multiple declarations of pci_mmap_page_range() to <linux/pci.h>
  PCI: Add arch_can_pci_mmap_wc() macro
  xtensa/PCI: Do not mmap PCI BARs to userspace as write-through
  PCI: Only allow WC mmap on prefetchable resources
  PCI: Fix another sanity check bug in /proc/pci mmap
  PCI: Fix pci_mmap_fits() for HAVE_PCI_RESOURCE_TO_USER platforms
2017-04-28 10:34:34 -05:00
Bjorn Helgaas
0b0ee66c4f Merge branch 'pci/ioremap' into next
* pci/ioremap:
  PCI: versatile: Update PCI config space remap function
  PCI: keystone-dw: Update PCI config space remap function
  PCI: layerscape: Update PCI config space remap function
  PCI: hisi: Update PCI config space remap function
  PCI: tegra: Update PCI config space remap function
  PCI: xgene: Update PCI config space remap function
  PCI: armada8k: Update PCI config space remap function
  PCI: designware: Update PCI config space remap function
  PCI: iproc-platform: Update PCI config space remap function
  PCI: qcom: Update PCI config space remap function
  PCI: rockchip: Update PCI config space remap function
  PCI: spear13xx: Update PCI config space remap function
  PCI: xilinx-nwl: Update PCI config space remap function
  PCI: xilinx: Update PCI config space remap function
  PCI: ECAM: Map config region with pci_remap_cfgspace()
  PCI: Implement devm_pci_remap_cfgspace()
  devres: fix devm_ioremap_*() offset parameter kerneldoc description
  ARM: Implement pci_remap_cfgspace() interface
  ARM64: Implement pci_remap_cfgspace() interface
  linux/io.h: Add pci_remap_cfgspace() interface
  PCI: Remove __weak tag from pci_remap_iospace()
2017-04-28 10:34:05 -05:00
Bjorn Helgaas
d060c6fcef Merge branch 'pci/switchtec' into next
* pci/switchtec:
  switchtec: Add IOCTLs to the Switchtec driver
  switchtec: Add sysfs attributes to the Switchtec driver
  switchtec: Add user interface documentation
  MicroSemi Switchtec management interface driver

Conflicts:
	drivers/pci/Kconfig
2017-04-28 10:33:41 -05:00
Bjorn Helgaas
7284a62dfd Merge branch 'pci/host-imx6' into next
* pci/host-imx6:
  PCI: imx6: Fix spelling mistake: "contol" -> "control"
  PCI: imx6: Do not switch speed if Gen2 is disabled
  PCI: imx6: Do not wait for speed change on i.MX7
  PCI: imx6: Allow probe deferral by reset GPIO
  PCI: imx6: Add code to support i.MX7D
2017-04-28 10:32:54 -05:00
Bjorn Helgaas
66aa51ce8b Merge branch 'pci/host-faraday' into next
* pci/host-faraday:
  PCI: faraday: Add Faraday Technology FTPCI100 PCI Host Bridge driver
  PCI: Add DT bindings for Faraday Technology PCI Host Bridge
2017-04-28 10:32:44 -05:00
Kishon Vijay Abraham I
16263d9e1d Documentation: PCI: Add userguide for PCI endpoint test function
Add documentation to help users use pci-epf-test function driver and
pci_endpoint_test host driver for testing PCI.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-04-28 10:23:20 -05:00
Kishon Vijay Abraham I
0cfb512e4a Documentation: misc-devices: Add Documentation for pci-endpoint-test driver
Add Documentation for pci-endpoint-test driver.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-04-28 10:23:19 -05:00
Kishon Vijay Abraham I
66abca1d9d dt-bindings: PCI: dra7xx: Add DT bindings to enable unaligned access
Update device tree binding documentation of TI's dra7xx PCI controller to
include property for enabling unaligned mem access.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-04-28 10:23:18 -05:00
Kishon Vijay Abraham I
40cc72e2b5 dt-bindings: PCI: dra7xx: Add DT bindings for PCI dra7xx EP mode
Add device tree binding documentation for PCI dra7xx EP mode.

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-04-28 10:23:17 -05:00
Kishon Vijay Abraham I
b12befecd7 dt-bindings: PCI: Add DT bindings for PCI designware EP mode
Add device tree binding documentation for PCI designware EP mode.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rob Herring <robh@kernel.org>
2017-04-28 10:23:17 -05:00
Kishon Vijay Abraham I
1357053381 Documentation: PCI: Add binding documentation for pci-test endpoint function
Add binding documentation for pci-test endpoint function that helps in
adding and configuring pci-test endpoint function.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-04-28 10:23:16 -05:00
Stan Drozd
9bb0e9cb04 docs: Fix a couple typos
This commit gets rid of some minor errors in Documentation/:
* cputopology.txt: drawes -> drawers
* debugging-via-ohci1394.txt: remove an unnecessary line break
* static-keys: statemnts -> statements
* zorro.txt: busses -> buses

Signed-off-by: Stan Drozd <drozdziak1@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-04-27 15:54:39 -06:00
Stan Drozd
1c4f128ed1 docs: Fix a spelling error in vfio-mediated-device.txt
This commit fixes a repeated "the" in vfio-mediated-device.txt and reflows the
paragraph.

Signed-off-by: Stan Drozd <drozdziak1@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-04-27 15:54:39 -06:00
Stan Drozd
e884dbcb3c docs: Fix a spelling error in ioctl-number.txt
This commit fixes a misspelled header name in the ioctl numbers list

Signed-off-by: Stan Drozd <drozdziak1@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-04-27 15:54:38 -06:00
Arnd Bergmann
b9f34da74e Fix DTC warnings in Exynos ARMv7 Device Tree sources.
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Merge tag 'samsung-dt-4.12-2' of git://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux into next/dt

Pull "Fix DTC warnings in Exynos ARMv7 Device Tree sources." from Krzysztof Kozłowski:

* tag 'samsung-dt-4.12-2' of git://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux:
  ARM: dts: exynos: Use - instead of @ for DT OPP entries
2017-04-27 21:47:50 +02:00
Paolo Bonzini
c24a7be211 KVM/ARM Changes for v4.12.
Changes include:
  - Using the common sysreg definitions between KVM and arm64
  - Improved hyp-stub implementation with support for kexec and kdump on the 32-bit side
  - Proper PMU exception handling
  - Performance improvements of our GIC handling
  - Support for irqchip in userspace with in-kernel arch-timers and PMU support
  - A fix for a race condition in our PSCI code
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Merge tag 'kvm-arm-for-v4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/ARM Changes for v4.12.

Changes include:
 - Using the common sysreg definitions between KVM and arm64
 - Improved hyp-stub implementation with support for kexec and kdump on the 32-bit side
 - Proper PMU exception handling
 - Performance improvements of our GIC handling
 - Support for irqchip in userspace with in-kernel arch-timers and PMU support
 - A fix for a race condition in our PSCI code

Conflicts:
	Documentation/virtual/kvm/api.txt
	include/uapi/linux/kvm.h
2017-04-27 17:33:14 +02:00
Paolo Bonzini
cf9bdd3577 KVM: s390: MSA8 feature for guests
- Detect all function codes for KMA and export the features
   for use in the cpu model
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Merge tag 'kvm-s390-next-4.12-3' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD

KVM: s390: MSA8 feature for guests

- Detect all function codes for KMA and export the features
  for use in the cpu model
2017-04-27 14:11:07 +02:00
Icenowy Zheng
d096ae4bb0 dt-bindings: Add AXP803's regulator info
AXP803 have the most regulators in currently supported AXP PMICs.

Add info for the regulators in the dt-bindings document.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2017-04-27 11:54:49 +01:00
Icenowy Zheng
19b465e956 dt-bindings: Add device tree binding for X-Powers AXP803 PMIC
AXP803 is a PMIC produced by Shenzhen X-Powers, with either I2C or RSB
bus.

Add a compatible for it.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2017-04-27 11:54:48 +01:00
Icenowy Zheng
7366709c5a dt-bindings: Make AXP20X compatible strings one per line
In the binding documentation of AXP20X mfd, the compatible strings used
to be listed for three per line, which leads to some mess when trying to
add AXP803 compatible string (as we have already AXP806 and AXP809
compatibles, which is after AXP803 in ascending order).

Make the compatible strings one per line, so that inserting a new
compatible string will be directly a new line.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2017-04-27 11:54:47 +01:00
Marek Szyprowski
8f1be5bd14 mfd: exynos-lpass: Add support for clocks
Exynos LPASS requires some clocks to be enabled to make any access to its
registers. This patch adds code for handling such clocks. For current set
of registers it is enough to keep sfr0_ctrl clock enabled. Till now it
worked only because those clocks were enabled by bootloader and driver
probe() happened before they were disabled by clock core because of lack
of users. Handling those clocks is also needed to make it possible to
enable support for audio power domain.

This patch requires adding sfr0_ctrl clock to device tree.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Acked-by: Rob Herring <robh@kernel.org>
Acked-for-MFD-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2017-04-27 09:25:07 +01:00
Marek Szyprowski
addebf1588 mfd: exynos-lpass: Remove pad retention control
Pad retention should be controlled from pin control driver, so remove it
from Exynos LPASS driver. After this change, no more access to PMU regmap
is needed, so remove also the code for handling PMU regmap.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Acked-by: Rob Herring <robh@kernel.org>
Acked-for-MFD-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2017-04-27 09:25:07 +01:00
Quentin Schulz
4d5db2a3a2 dt-bindings: input: touschcreen: Remove sun4i documentation
This patch removes the sun4i touchscreen controller binding
documentation since it has been merged with the sun4i GPADC binding
documentation.

Signed-off-by: Quentin Schulz <quentin.schulz@free-electrons.com>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2017-04-27 09:25:07 +01:00
Quentin Schulz
fe37c4b981 dt-bindings: mfd: Add A33 GPADC binding
This patch adds documentation for the A33 GPADC binding.

Signed-off-by: Quentin Schulz <quentin.schulz@free-electrons.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2017-04-27 09:25:07 +01:00
Steve Twiss
e1569fb64e dt-bindings: mfd: DA9062/61 MFD binding
Extend existing DA9062 binding information to include the DA9061 PMIC for
MFD core and regulators.

Add a da9062-onkey link to the existing onkey binding file.

Add a da9062-thermal link to the new temperature monitoring binding file.

Delete the da9062-watchdog section and replace it with a link to the new
DA9061/62 binding information file.

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Steve Twiss <stwiss.opensource@diasemi.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2017-04-27 09:25:07 +01:00
Sean Wang
74772a300a dt-bindings: mfd: Add the description for LED as the sub module
This patch adds description for LED as the sub-module on MT6397/MT6323
multifunction device.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2017-04-27 09:25:05 +01:00
Thor Thayer
66da627e0c dt-bindings: mfd: Add Altera Arria10 SR Reset Controller bindings
This patch adds documentation for the Altera A10-SR Reset
Controller DT bindings.

Signed-off-by: Thor Thayer <thor.thayer@linux.intel.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2017-04-27 09:25:04 +01:00
Milo Kim
287cce719d dt-bindings: mfd: Add TI LMU device binding information
This patch describes overall binding for TI LMU MFD devices.

Signed-off-by: Milo Kim <milo.kim@ti.com>
Acked-by: Rob Herring <robh+dt@kernel.org>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2017-04-27 09:25:04 +01:00
Rask Ingemann Lambertsen
8461cf20d1 dt-bindings: mfd: axp20x: Add "xpowers,master-mode" property for AXP806 PMICs
commit b101829a029a ("mfd: axp20x: Fix AXP806 access errors on cold boot")
was intended to fix the case where a board uses an AXP806 in slave mode,
but the boot loader leaves it in master mode for lack of AXP806 support.
But now the driver breaks on boards where the PMIC is operating in master
mode. To let the device tree describe which mode of operation is needed,
this patch introduces a new property "xpowers,master-mode".

Fixes: 204ae2963e10 ("mfd: axp20x: Add bindings for AXP806 PMIC")
Signed-off-by: Rask Ingemann Lambertsen <rask@formelder.dk>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2017-04-27 09:25:04 +01:00
Lee Jones
18973ceb89 Merge branches 'ib-mfd-gpio-4.12', 'ib-mfd-iio-input-4.12', 'ib-mfd-input-4.12', 'ib-mfd-leds-4.12', 'ib-mfd-phy-4.12' and 'ib-mfd-pinctrl-samsung-4.12' into ibs-for-mfd-merged 2017-04-27 09:24:41 +01:00
Marek Vasut
80a49fd824 iio: adc: rcar-gyroadc: Drop if clock from Renesas GyroADC bindings
The "if" interface clock speed is actually derived from the "fck"
block clock, as in the hardware they are the same clock. Drop the
incorrect second "if" clock and retain only the "fck" clock.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Rob Herring <robh@kernel.org>
Cc: linux-renesas-soc@vger.kernel.org
To: devicetree@vger.kernel.org
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-04-27 06:00:19 +01:00
Paul E. McKenney
22607d66bb srcu: Specify auto-expedite holdoff time
On small systems, in the absence of readers, expedited SRCU grace
periods can complete in less than a microsecond.  This means that an
eight-CPU system can have all CPUs doing synchronize_srcu() in a tight
loop and almost always expedite.  This might actually be desirable in
some situations, but in general it is a good way to needlessly burn
CPU cycles.  And in those situations where it is desirable, your friend
is the function synchronize_srcu_expedited().

For other situations, this commit adds a kernel parameter that specifies
a holdoff between completing the last SRCU grace period and auto-expediting
the next.  If the next grace period starts before the holdoff expires,
auto-expediting is disabled.  The holdoff is 50 microseconds by default,
and can be tuned to the desired number of nanoseconds.  A value of zero
disables auto-expediting.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Tested-by: Mike Galbraith <efault@gmx.de>
2017-04-26 16:32:17 -07:00
Shaohua Li
bfd20f1cc8 x86, iommu/vt-d: Add an option to disable Intel IOMMU force on
IOMMU harms performance signficantly when we run very fast networking
workloads. It's 40GB networking doing XDP test. Software overhead is
almost unaware, but it's the IOTLB miss (based on our analysis) which
kills the performance. We observed the same performance issue even with
software passthrough (identity mapping), only the hardware passthrough
survives. The pps with iommu (with software passthrough) is only about
~30% of that without it. This is a limitation in hardware based on our
observation, so we'd like to disable the IOMMU force on, but we do want
to use TBOOT and we can sacrifice the DMA security bought by IOMMU. I
must admit I know nothing about TBOOT, but TBOOT guys (cc-ed) think not
eabling IOMMU is totally ok.

So introduce a new boot option to disable the force on. It's kind of
silly we need to run into intel_iommu_init even without force on, but we
need to disable TBOOT PMR registers. For system without the boot option,
nothing is changed.

Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-04-26 23:57:53 +02:00
Florian Fainelli
4c5e7a2c05 dt-bindings: mdio: Clarify binding document
The described GPIO reset property is applicable to *all* child PHYs. If
we have one reset line per PHY present on the MDIO bus, these
automatically become properties of the child PHY nodes.

Finally, indicate how the RESET pulse width must be defined, which is
the maximum value of all individual PHYs RESET pulse widths determined
by reading their datasheets.

Fixes: 69226896ad63 ("mdio_bus: Issue GPIO RESET to PHYs.")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-26 14:45:34 -04:00
olivier moysan
b45c4f117b ASoC: stm32: add bindings for SAI
This patch adds documentation of device tree bindings for the
STM32 SAI ASoC driver.

Signed-off-by: olivier moysan <olivier.moysan@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2017-04-26 16:45:53 +01:00
Mark Brown
fbdd1b2aff Merge remote-tracking branches 'spi/topic/loopback', 'spi/topic/omap2-mcspi', 'spi/topic/orion', 'spi/topic/pl022' and 'spi/topic/sc18is602' into spi-next 2017-04-26 15:58:10 +01:00