Commit Graph

495 Commits

Author SHA1 Message Date
Mauro Carvalho Chehab
ff768f596f media: docs: kAPI docs: move them to driver-api
All those documents describe the media driver API. So, move
them to the right place within the Kernel documentation.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-04-14 10:32:45 +02:00
Linus Torvalds
ca6151a978 A handful of late-arriving fixes for the documentation tree.
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Merge tag 'docs-5.7-2' of git://git.lwn.net/linux

Pull Documentation fixes from Jonathan Corbet:
 "A handful of late-arriving fixes for the documentation tree"

* tag 'docs-5.7-2' of git://git.lwn.net/linux:
  Documentation: android: binderfs: add 'stats' mount option
  Documentation: driver-api/usb/writing_usb_driver.rst Updates documentation links
  docs: driver-api: address duplicate label warning
  Documentation: sysrq: fix RST formatting
  docs: kernel-parameters.txt: Fix broken references
  docs: kernel-parameters.txt: Remove nompx
  docs: filesystems: fix typo in qnx6.rst
2020-04-10 17:53:43 -07:00
Linus Torvalds
34183ddd13 - Convert tsens configuration DT binding to yaml (Rajeshwari)
- Add interrupt support on the rcar sensor (Niklas Söderlund)
 
 - Add a new Spreadtrum thermal driver (Baolin Wang)
 
 - Add thermal binding for the fsl scu board, a new API to retrieve the
   sensor id bound to the thermal zone and i.MX system controller
   sensor (Anson Huang))
 
 - Remove warning log when a deferred probe is requested on Exynos
   (Marek Szyprowski)
 
 - Add the thermal monitoring unit support for imx8mm with its DT
   bindings (Anson Huang)
 
 - Rephrase the Kconfig text for clarity (Linus Walleij)
 
 - Use the gpio descriptor for the ti-soc-thermal (Linus Walleij)
 
 - Align msg structure to 4 bytes for i.MX SC, fix the Kconfig
   dependency, add the __may_be unused annotation for PM functions and
   the COMPILE_TEST option for imx8mm (Anson Huang)
 
 - Fix a dependency on regmap in Kconfig for qoriq (Yuantian Tang)
 
 - Add DT binding and support for the rcar gen3 r8a77961 and improve
   the error path on the rcar init function (Niklas Söderlund)
 
 - Cleanup and improvements for the tsens Qcom sensor (Amit Kucheria)
 
 - Improve code by removing lock and caching values in the rcar thermal
   sensor (Niklas Söderlund)
 
 - Cleanup in the qoriq drivers and add a call to
   imx_thermal_unregister_legacy_cooling in the removal function (Anson
   Huang)
 
 - Remove redundant 'maxItems' in tsens and sprd DT bindings (Rob Herring)
 
 - Change the thermal DT bindings by making the cooling-maps optional
   (Yuantian Tang)
 
 - Add Tiger Lake support (Sumeet Pawnikar)
 
 - Use scnprintf() for avoiding potential buffer overflow (Takashi Iwai)
 
 - Make pkg_temp_lock a raw_spinlock_t(Clark Williams)
 
 - Fix incorrect data types by changing them to signed on i.MX SC (Anson Huang)
 
 - Replace zero-length array with flexible-array member (Gustavo A. R. Silva)
 
 - Add support for i.MX8MP in the driver and in the DT bindings (Anson Huang)
 
 - Fix return value of the cpufreq_set_cur_state() function (Willy Wolff)
 
 - Remove abusing and scary WARN_ON in the cpufreq cooling device
   (Daniel Lezcano)
 
 - Fix build warning of incorrect argument type reported by sparse on
   imx8mm (Anson Huang)
 
 - Fix stub for the devfreq cooling device (Martin Blumenstingl)
 
 - Fix cpu idle cooling documentation (Sergey Vidishev)
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Merge tag 'thermal-v5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thermal/linux

Pull thermal updates from Daniel Lezcano:

 - Convert tsens configuration DT binding to yaml (Rajeshwari)

 - Add interrupt support on the rcar sensor (Niklas Söderlund)

 - Add a new Spreadtrum thermal driver (Baolin Wang)

 - Add thermal binding for the fsl scu board, a new API to retrieve the
   sensor id bound to the thermal zone and i.MX system controller sensor
   (Anson Huang))

 - Remove warning log when a deferred probe is requested on Exynos
   (Marek Szyprowski)

 - Add the thermal monitoring unit support for imx8mm with its DT
   bindings (Anson Huang)

 - Rephrase the Kconfig text for clarity (Linus Walleij)

 - Use the gpio descriptor for the ti-soc-thermal (Linus Walleij)

 - Align msg structure to 4 bytes for i.MX SC, fix the Kconfig
   dependency, add the __may_be unused annotation for PM functions and
   the COMPILE_TEST option for imx8mm (Anson Huang)

 - Fix a dependency on regmap in Kconfig for qoriq (Yuantian Tang)

 - Add DT binding and support for the rcar gen3 r8a77961 and improve the
   error path on the rcar init function (Niklas Söderlund)

 - Cleanup and improvements for the tsens Qcom sensor (Amit Kucheria)

 - Improve code by removing lock and caching values in the rcar thermal
   sensor (Niklas Söderlund)

 - Cleanup in the qoriq drivers and add a call to
   imx_thermal_unregister_legacy_cooling in the removal function (Anson
   Huang)

 - Remove redundant 'maxItems' in tsens and sprd DT bindings (Rob
   Herring)

 - Change the thermal DT bindings by making the cooling-maps optional
   (Yuantian Tang)

 - Add Tiger Lake support (Sumeet Pawnikar)

 - Use scnprintf() for avoiding potential buffer overflow (Takashi Iwai)

 - Make pkg_temp_lock a raw_spinlock_t(Clark Williams)

 - Fix incorrect data types by changing them to signed on i.MX SC (Anson
   Huang)

 - Replace zero-length array with flexible-array member (Gustavo A. R.
   Silva)

 - Add support for i.MX8MP in the driver and in the DT bindings (Anson
   Huang)

 - Fix return value of the cpufreq_set_cur_state() function (Willy
   Wolff)

 - Remove abusing and scary WARN_ON in the cpufreq cooling device
   (Daniel Lezcano)

 - Fix build warning of incorrect argument type reported by sparse on
   imx8mm (Anson Huang)

 - Fix stub for the devfreq cooling device (Martin Blumenstingl)

 - Fix cpu idle cooling documentation (Sergey Vidishev)

* tag 'thermal-v5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thermal/linux: (52 commits)
  Documentation: cpu-idle-cooling: Fix diagram for 33% duty cycle
  thermal: devfreq_cooling: inline all stubs for CONFIG_DEVFREQ_THERMAL=n
  thermal: imx8mm: Fix build warning of incorrect argument type
  thermal/drivers/cpufreq_cooling: Remove abusing WARN_ON
  thermal/drivers/cpufreq_cooling: Fix return of cpufreq_set_cur_state
  thermal: imx8mm: Add i.MX8MP support
  dt-bindings: thermal: imx8mm-thermal: Add support for i.MX8MP
  thermal: qcom: tsens.h: Replace zero-length array with flexible-array member
  thermal: imx_sc_thermal: Fix incorrect data type
  thermal: int340x_thermal: Use scnprintf() for avoiding potential buffer overflow
  thermal: int340x: processor_thermal: Add Tiger Lake support
  thermal/x86_pkg_temp: Make pkg_temp_lock a raw_spinlock_t
  dt-bindings: thermal: make cooling-maps property optional
  dt-bindings: thermal: qcom-tsens: Remove redundant 'maxItems'
  dt-bindings: thermal: sprd: Remove redundant 'maxItems'
  thermal: imx: Calling imx_thermal_unregister_legacy_cooling() in .remove
  thermal: qoriq: Sort includes alphabetically
  thermal: qoriq: Use devm_add_action_or_reset() to handle all cleanups
  thermal: rcar_thermal: Remove lock in rcar_thermal_get_current_temp()
  thermal: rcar_thermal: Do not store ctemp in rcar_thermal_priv
  ...
2020-04-07 20:00:16 -07:00
Joakim Lönnegren
19905fe667 Documentation: driver-api/usb/writing_usb_driver.rst Updates documentation links
In writing_usb_driver.rst:
Remove link to https://www.qbik.ch/usb/devices/ since it seems to be inactive since 2013
Update link to linux-usb mailing list archive

Signed-off-by: Joakim Lönnegren <joakimlonnegren@gmail.com>
Link: https://lore.kernel.org/r/20200312201354.285839-1-joakimlonnegren@gmail.om
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-04-07 13:43:55 -06:00
Lukas Bulwahn
2abf99b94c docs: driver-api: address duplicate label warning
Delete identically named subsection to fix Documentation warning:

  Documentation/driver-api/w1.rst:11: \
  WARNING: duplicate label driver-api/w1:w1 api internal to the kernel, \
  other instance in Documentation/driver-api/w1.rst

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Link: https://lore.kernel.org/r/20200330060132.7773-1-lukas.bulwahn@gmail.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-04-07 13:41:34 -06:00
Sergey Vidishev
11700fcb90 Documentation: cpu-idle-cooling: Fix diagram for 33% duty cycle
Signed-off-by: Sergey Vidishev <sergeyv@yandex-team.ru>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/2374188.AZIXMmL6Zy@sergeyv-box
2020-04-07 10:45:15 +02:00
Linus Torvalds
828907ef25 This is the bulk of GPIO development for the v5.7 kernel cycle.
Core and userspace API:
 
 - The userspace API KFIFOs have been imoproved with locks that
   do not block interrupts. This makes us better at getting
   events to userspace without blocking or disturbing new events
   arriving in the same time. This was reviewed by the KFIFO
   maintainer Stefani. This is a generic improvement which
   paves the road for similar improvements in other subsystems.
 
 - We provide a new ioctl() for monitoring changes in the line
   information, such as when multiple clients are taking lines
   and giving them back, possibly reconfiguring them in the
   process: we can now monitor that and not get stuck with stale
   static information.
 
 - An example tool 'gpio-watch' is provided to showcase this
   functionality.
 
 - Timestamps for events are switched to ktime_get_ns() which is
   monotonic. We previously had a 'realtime' stamp which could
   move forward and *backward* in time, which probably would just
   cause silent bugs and weird behaviour. In the long run we
   see two relevant timestamps: ktime_get_ns() or the timestamp
   sometimes provided by the GPIO hardware itself, if that
   exists.
 
 - Device Tree overlay support for GPIO hogs. On systems that
   load overlays, these overlays can now contain hogs, and will
   then be respected.
 
 - Handle pin control interaction with nonexisting pin ranges
   in the GPIO library core instead of in the individual
   drivers.
 
 New drivers:
 
 - New driver for the Mellanox BlueField 2 GPIO controller.
 
 Driver improvements:
 
 - Introduce the BGPIOF_NO_SET_ON_INPUT flag to the generic
   MMIO GPIO library and use this flag in the MT7621 driver.
 
 - Texas Instruments OMAP CPU power management improvements,
   such as blocking of idle on pending GPIO interrupts.
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Merge tag 'gpio-v5.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO updates from Linus Walleij:
 "This is the bulk of GPIO development for the v5.7 kernel cycle.

  Core and userspace API:

   - The userspace API KFIFOs have been imoproved with locks that do not
     block interrupts. This makes us better at getting events to
     userspace without blocking or disturbing new events arriving in the
     same time. This was reviewed by the KFIFO maintainer Stefani. This
     is a generic improvement which paves the road for similar
     improvements in other subsystems.

   - We provide a new ioctl() for monitoring changes in the line
     information, such as when multiple clients are taking lines and
     giving them back, possibly reconfiguring them in the process: we
     can now monitor that and not get stuck with stale static
     information.

   - An example tool 'gpio-watch' is provided to showcase this
     functionality.

   - Timestamps for events are switched to ktime_get_ns() which is
     monotonic. We previously had a 'realtime' stamp which could move
     forward and *backward* in time, which probably would just cause
     silent bugs and weird behaviour. In the long run we see two
     relevant timestamps: ktime_get_ns() or the timestamp sometimes
     provided by the GPIO hardware itself, if that exists.

   - Device Tree overlay support for GPIO hogs. On systems that load
     overlays, these overlays can now contain hogs, and will then be
     respected.

   - Handle pin control interaction with nonexisting pin ranges in the
     GPIO library core instead of in the individual drivers.

  New drivers:

   - New driver for the Mellanox BlueField 2 GPIO controller.

  Driver improvements:

   - Introduce the BGPIOF_NO_SET_ON_INPUT flag to the generic MMIO GPIO
     library and use this flag in the MT7621 driver.

   - Texas Instruments OMAP CPU power management improvements, such as
     blocking of idle on pending GPIO interrupts"

* tag 'gpio-v5.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (59 commits)
  Revert "gpio: eic-sprd: Use devm_platform_ioremap_resource()"
  pinctrl: Unconditionally assign .request()/.free()
  gpio: Unconditionally assign .request()/.free()
  gpio: export of_pinctrl_get to modules
  pinctrl: Define of_pinctrl_get() dummy for !PINCTRL
  gpio: Rename variable in core APIs
  gpio: Avoid using pin ranges with !PINCTRL
  gpiolib: Remove unused gpio_chip parameter from gpio_set_bias()
  gpiolib: Pass gpio_desc to gpio_set_config()
  gpiolib: Introduce gpiod_set_config()
  tools: gpio: Fix out-of-tree build regression
  gpio: gpiolib: fix a doc warning
  gpio: tegra186: Add Tegra194 pin ranges for GG.0 and GG.1
  gpio: tegra186: Add support for pin ranges
  gpio: Support GPIO controllers without pin-ranges
  ARM: integrator: impd1: Use GPIO_LOOKUP() helper macro
  gpio: brcmstb: support gpio-line-names property
  tools: gpio: Fix typo in gpio-utils
  tools: gpio-hammer: Apply scripts/Lindent and retain good changes
  gpiolib: gpio_name_to_desc: factor out !name check
  ...
2020-04-04 10:27:00 -07:00
Linus Torvalds
0ad5b053d4 Char/Misc driver patches for 5.7-rc1
Here is the big set of char/misc/other driver patches for 5.7-rc1.
 
 Lots of things in here, and it's later than expected due to some reverts
 to resolve some reported issues.  All is now clean with no reported
 problems in linux-next.
 
 Included in here is:
 	- interconnect updates
 	- mei driver updates
 	- uio updates
 	- nvmem driver updates
 	- soundwire updates
 	- binderfs updates
 	- coresight updates
 	- habanalabs updates
 	- mhi new bus type and core
 	- extcon driver updates
 	- some Kconfig cleanups
 	- other small misc driver cleanups and updates
 
 As mentioned, all have been in linux-next for a while, and with the last
 two reverts, all is calm and good.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc driver updates from Greg KH:
 "Here is the big set of char/misc/other driver patches for 5.7-rc1.

  Lots of things in here, and it's later than expected due to some
  reverts to resolve some reported issues. All is now clean with no
  reported problems in linux-next.

  Included in here is:
   - interconnect updates
   - mei driver updates
   - uio updates
   - nvmem driver updates
   - soundwire updates
   - binderfs updates
   - coresight updates
   - habanalabs updates
   - mhi new bus type and core
   - extcon driver updates
   - some Kconfig cleanups
   - other small misc driver cleanups and updates

  As mentioned, all have been in linux-next for a while, and with the
  last two reverts, all is calm and good"

* tag 'char-misc-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (174 commits)
  Revert "driver core: platform: Initialize dma_parms for platform devices"
  Revert "amba: Initialize dma_parms for amba devices"
  amba: Initialize dma_parms for amba devices
  driver core: platform: Initialize dma_parms for platform devices
  bus: mhi: core: Drop the references to mhi_dev in mhi_destroy_device()
  bus: mhi: core: Initialize bhie field in mhi_cntrl for RDDM capture
  bus: mhi: core: Add support for reading MHI info from device
  misc: rtsx: set correct pcr_ops for rts522A
  speakup: misc: Use dynamic minor numbers for speakup devices
  mei: me: add cedar fork device ids
  coresight: do not use the BIT() macro in the UAPI header
  Documentation: provide IBM contacts for embargoed hardware
  nvmem: core: remove nvmem_sysfs_get_groups()
  nvmem: core: use is_bin_visible for permissions
  nvmem: core: use device_register and device_unregister
  nvmem: core: add root_only member to nvmem device struct
  extcon: axp288: Add wakeup support
  extcon: Mark extcon_get_edev_name() function as exported symbol
  extcon: palmas: Hide error messages if gpio returns -EPROBE_DEFER
  dt-bindings: extcon: usbc-cros-ec: convert extcon-usbc-cros-ec.txt to yaml format
  ...
2020-04-03 13:22:40 -07:00
Linus Torvalds
79f51b7b9c SCSI misc on 20200402
update changing all our txt files to rst ones.  Excluding that, we
 have the usual driver updates (qla2xxx, ufs, lpfc, zfcp, ibmvfc,
 pm80xx, aacraid), a treewide update for scnprintf and some other minor
 updates.  The major core update is Hannes moving functions out of the
 aacraid driver and into the core.
 
 Signed-off-by: James E.J. Bottomley <jejb@linux.ibm.com>
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Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI updates from James Bottomley:
 "This series has a huge amount of churn because it pulls in Mauro's doc
  update changing all our txt files to rst ones.

  Excluding that, we have the usual driver updates (qla2xxx, ufs, lpfc,
  zfcp, ibmvfc, pm80xx, aacraid), a treewide update for scnprintf and
  some other minor updates.

  The major core change is Hannes moving functions out of the aacraid
  driver and into the core"

* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (223 commits)
  scsi: aic7xxx: aic97xx: Remove FreeBSD-specific code
  scsi: ufs: Do not rely on prefetched data
  scsi: dc395x: remove dc395x_bios_param
  scsi: libiscsi: Fix error count for active session
  scsi: hpsa: correct race condition in offload enabled
  scsi: message: fusion: Replace zero-length array with flexible-array member
  scsi: qedi: Add PCI shutdown handler support
  scsi: qedi: Add MFW error recovery process
  scsi: ufs: Enable block layer runtime PM for well-known logical units
  scsi: ufs-qcom: Override devfreq parameters
  scsi: ufshcd: Let vendor override devfreq parameters
  scsi: ufshcd: Update the set frequency to devfreq
  scsi: ufs: Resume ufs host before accessing ufs device
  scsi: ufs-mediatek: customize the delay for enabling host
  scsi: ufs: make HCE polling more compact to improve initialization latency
  scsi: ufs: allow custom delay prior to host enabling
  scsi: ufs-mediatek: use common delay function
  scsi: ufs: introduce common and flexible delay function
  scsi: ufs: use an enum for host capabilities
  scsi: ufs: fix uninitialized tx_lanes in ufshcd_disable_tx_lcc()
  ...
2020-04-02 17:03:53 -07:00
Linus Torvalds
a776c270a0 Merge branch 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull EFI updates from Ingo Molnar:
 "The EFI changes in this cycle are much larger than usual, for two
  (positive) reasons:

   - The GRUB project is showing signs of life again, resulting in the
     introduction of the generic Linux/UEFI boot protocol, instead of
     x86 specific hacks which are increasingly difficult to maintain.
     There's hope that all future extensions will now go through that
     boot protocol.

   - Preparatory work for RISC-V EFI support.

  The main changes are:

   - Boot time GDT handling changes

   - Simplify handling of EFI properties table on arm64

   - Generic EFI stub cleanups, to improve command line handling, file
     I/O, memory allocation, etc.

   - Introduce a generic initrd loading method based on calling back
     into the firmware, instead of relying on the x86 EFI handover
     protocol or device tree.

   - Introduce a mixed mode boot method that does not rely on the x86
     EFI handover protocol either, and could potentially be adopted by
     other architectures (if another one ever surfaces where one
     execution mode is a superset of another)

   - Clean up the contents of 'struct efi', and move out everything that
     doesn't need to be stored there.

   - Incorporate support for UEFI spec v2.8A changes that permit
     firmware implementations to return EFI_UNSUPPORTED from UEFI
     runtime services at OS runtime, and expose a mask of which ones are
     supported or unsupported via a configuration table.

   - Partial fix for the lack of by-VA cache maintenance in the
     decompressor on 32-bit ARM.

   - Changes to load device firmware from EFI boot service memory
     regions

   - Various documentation updates and minor code cleanups and fixes"

* 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (114 commits)
  efi/libstub/arm: Fix spurious message that an initrd was loaded
  efi/libstub/arm64: Avoid image_base value from efi_loaded_image
  partitions/efi: Fix partition name parsing in GUID partition entry
  efi/x86: Fix cast of image argument
  efi/libstub/x86: Use ULONG_MAX as upper bound for all allocations
  efi: Fix a mistype in comments mentioning efivar_entry_iter_begin()
  efi/libstub: Avoid linking libstub/lib-ksyms.o into vmlinux
  efi/x86: Preserve %ebx correctly in efi_set_virtual_address_map()
  efi/x86: Ignore the memory attributes table on i386
  efi/x86: Don't relocate the kernel unless necessary
  efi/x86: Remove extra headroom for setup block
  efi/x86: Add kernel preferred address to PE header
  efi/x86: Decompress at start of PE image load address
  x86/boot/compressed/32: Save the output address instead of recalculating it
  efi/libstub/x86: Deal with exit() boot service returning
  x86/boot: Use unsigned comparison for addresses
  efi/x86: Avoid using code32_start
  efi/x86: Make efi32_pe_entry() more readable
  efi/x86: Respect 32-bit ABI in efi32_pe_entry()
  efi/x86: Annotate the LOADED_IMAGE_PROTOCOL_GUID with SYM_DATA
  ...
2020-03-30 16:13:08 -07:00
Linus Torvalds
59838093be Driver core patches for 5.7-rc1
Here is the "big" set of driver core changes for 5.7-rc1.
 
 Nothing huge in here, just lots of little firmware core changes and use
 of new apis, a libfs fix, a debugfs api change, and some driver core
 deferred probe rework.
 
 All of these have been in linux-next for a while with no reported
 issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core updates from Greg KH:
 "Here is the "big" set of driver core changes for 5.7-rc1.

  Nothing huge in here, just lots of little firmware core changes and
  use of new apis, a libfs fix, a debugfs api change, and some driver
  core deferred probe rework.

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'driver-core-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (44 commits)
  Revert "driver core: Set fw_devlink to "permissive" behavior by default"
  driver core: Set fw_devlink to "permissive" behavior by default
  driver core: Replace open-coded list_last_entry()
  driver core: Read atomic counter once in driver_probe_done()
  libfs: fix infoleak in simple_attr_read()
  driver core: Add device links from fwnode only for the primary device
  platform/x86: touchscreen_dmi: Add info for the Chuwi Vi8 Plus tablet
  platform/x86: touchscreen_dmi: Add EFI embedded firmware info support
  Input: icn8505 - Switch to firmware_request_platform for retreiving the fw
  Input: silead - Switch to firmware_request_platform for retreiving the fw
  selftests: firmware: Add firmware_request_platform tests
  test_firmware: add support for firmware_request_platform
  firmware: Add new platform fallback mechanism and firmware_request_platform()
  Revert "drivers: base: power: wakeup.c: Use built-in RCU list checking"
  drivers: base: power: wakeup.c: Use built-in RCU list checking
  component: allow missing unbind callback
  debugfs: remove return value of debugfs_create_file_size()
  debugfs: Check module state before warning in {full/open}_proxy_open()
  firmware: fix a double abort case with fw_load_sysfs_fallback
  arch_topology: Fix putting invalid cpu clk
  ...
2020-03-30 13:59:52 -07:00
Linus Torvalds
db34c5ffee USB / PHY patches for 5.7-rc1
Here are the big set of USB and PHY driver patches for 5.7-rc1.
 
 Nothing huge here, some new PHY drivers, loads of USB gadget fixes and
 updates, xhci updates, usb-serial driver updates and new device ids, and
 other minor things.  Full details in the shortlog.
 
 All have been in linux-next for a while with no reported issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB / PHY updates from Greg KH:
 "Here are the big set of USB and PHY driver patches for 5.7-rc1.

  Nothing huge here, some new PHY drivers, loads of USB gadget fixes and
  updates, xhci updates, usb-serial driver updates and new device ids,
  and other minor things. Full details in the shortlog.

  All have been in linux-next for a while with no reported issues"

* tag 'usb-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (239 commits)
  USB: cdc-acm: restore capability check order
  usb: cdns3: make signed 1 bit bitfields unsigned
  usb: gadget: fsl: remove unused variable 'driver_desc'
  usb: gadget: f_fs: Fix use after free issue as part of queue failure
  usb: typec: Correct the documentation for typec_cable_put()
  USB: serial: io_edgeport: fix slab-out-of-bounds read in edge_interrupt_callback
  USB: serial: option: add Wistron Neweb D19Q1
  USB: serial: option: add BroadMobi BM806U
  USB: serial: option: add support for ASKEY WWHC050
  usb: core: Add ACPI support for USB interface devices
  driver core: platform: Reimplement devm_platform_ioremap_resource
  usb: dwc2: convert to devm_platform_get_and_ioremap_resource
  usb: host: hisilicon: convert to devm_platform_get_and_ioremap_resource
  usb: host: xhci-plat: convert to devm_platform_get_and_ioremap_resource
  drivers: provide devm_platform_get_and_ioremap_resource()
  phy: qcom-qusb2: Add new overriding tuning parameters in QUSB2 V2 PHY
  phy: qcom-qusb2: Add support for overriding tuning parameters in QUSB2 V2 PHY
  dt-bindings: phy: qcom-qusb2: Add support for overriding Phy tuning parameters
  phy: qcom-qusb2: Add generic QUSB2 V2 PHY support
  dt-bindings: phy: qcom,qusb2: Add compatibles for QUSB2 V2 phy and SC7180
  ...
2020-03-30 13:54:11 -07:00
Linus Torvalds
481ed297d9 This has been a busy cycle for documentation work. Highlights include:
- Lots of RST conversion work by Mauro, Daniel ALmeida, and others.
     Maybe someday we'll get to the end of this stuff...maybe...
 
   - Some organizational work to bring some order to the core-api manual.
 
   - Various new docs and additions to the existing documentation.
 
   - Typo fixes, warning fixes, ...
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Merge tag 'docs-5.7' of git://git.lwn.net/linux

Pull documentation updates from Jonathan Corbet:
 "This has been a busy cycle for documentation work.

  Highlights include:

   - Lots of RST conversion work by Mauro, Daniel ALmeida, and others.
     Maybe someday we'll get to the end of this stuff...maybe...

   - Some organizational work to bring some order to the core-api
     manual.

   - Various new docs and additions to the existing documentation.

   - Typo fixes, warning fixes, ..."

* tag 'docs-5.7' of git://git.lwn.net/linux: (123 commits)
  Documentation: x86: exception-tables: document CONFIG_BUILDTIME_TABLE_SORT
  MAINTAINERS: adjust to filesystem doc ReST conversion
  docs: deprecated.rst: Add BUG()-family
  doc: zh_CN: add translation for virtiofs
  doc: zh_CN: index files in filesystems subdirectory
  docs: locking: Drop :c:func: throughout
  docs: locking: Add 'need' to hardirq section
  docs: conf.py: avoid thousands of duplicate label warning on Sphinx
  docs: prevent warnings due to autosectionlabel
  docs: fix reference to core-api/namespaces.rst
  docs: fix pointers to io-mapping.rst and io_ordering.rst files
  Documentation: Better document the softlockup_panic sysctl
  docs: hw-vuln: tsx_async_abort.rst: get rid of an unused ref
  docs: perf: imx-ddr.rst: get rid of a warning
  docs: filesystems: fuse.rst: supress a Sphinx warning
  docs: translations: it: avoid duplicate refs at programming-language.rst
  docs: driver.rst: supress two ReSt warnings
  docs: trace: events.rst: convert some new stuff to ReST format
  Documentation: Add io_ordering.rst to driver-api manual
  Documentation: Add io-mapping.rst to driver-api manual
  ...
2020-03-30 12:45:23 -07:00
Linus Walleij
06dd3f31cb Linux 5.6-rc7
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Merge tag 'v5.6-rc7' into devel

Linux 5.6-rc7
2020-03-27 22:36:17 +01:00
Mauro Carvalho Chehab
f8c3cea834 docs: gpio: driver.rst: don't mark literal blocks twice
Two literal blocks there are marked with both "::" and

	.. code-block:: c

This causes Sphinx (2.4.1) to do the wrong thing, causing
lots of warnings:

    Documentation/driver-api/gpio/driver.rst:425: WARNING: Unexpected indentation.
    Documentation/driver-api/gpio/driver.rst:423: WARNING: Inline emphasis start-string without end-string.
    Documentation/driver-api/gpio/driver.rst:427: WARNING: Block quote ends without a blank line; unexpected unindent.
    Documentation/driver-api/gpio/driver.rst:429: WARNING: Inline emphasis start-string without end-string.
    Documentation/driver-api/gpio/driver.rst:429: WARNING: Inline emphasis start-string without end-string.
    Documentation/driver-api/gpio/driver.rst:429: WARNING: Inline emphasis start-string without end-string.
    Documentation/driver-api/gpio/driver.rst:433: WARNING: Inline emphasis start-string without end-string.
    Documentation/driver-api/gpio/driver.rst:446: WARNING: Unexpected indentation.
    Documentation/driver-api/gpio/driver.rst:440: WARNING: Inline emphasis start-string without end-string.
    Documentation/driver-api/gpio/driver.rst:440: WARNING: Inline emphasis start-string without end-string.
    Documentation/driver-api/gpio/driver.rst:447: WARNING: Block quote ends without a blank line; unexpected unindent.
    Documentation/driver-api/gpio/driver.rst:449: WARNING: Definition list ends without a blank line; unexpected unindent.
    Documentation/driver-api/gpio/driver.rst:462: WARNING: Unexpected indentation.
    Documentation/driver-api/gpio/driver.rst:460: WARNING: Inline emphasis start-string without end-string.
    Documentation/driver-api/gpio/driver.rst:462: WARNING: Inline emphasis start-string without end-string.
    Documentation/driver-api/gpio/driver.rst:465: WARNING: Block quote ends without a blank line; unexpected unindent.
    Documentation/driver-api/gpio/driver.rst:467: WARNING: Inline emphasis start-string without end-string.
    Documentation/driver-api/gpio/driver.rst:467: WARNING: Inline emphasis start-string without end-string.
    Documentation/driver-api/gpio/driver.rst:467: WARNING: Inline emphasis start-string without end-string.
    Documentation/driver-api/gpio/driver.rst:471: WARNING: Inline emphasis start-string without end-string.
    Documentation/driver-api/gpio/driver.rst:478: WARNING: Inline emphasis start-string without end-string.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-03-25 09:50:44 +01:00
Linus Torvalds
c6ac7188c1 dmaengine-fix-5.6
Late fixes in dmaengine for v5.6:
   - move .device_release missing log warning to debug
   - couple of maintainer entries for HiSilicon and IADX drivers
   - one off fix for idxd driver
   - documentation warn fixes
   - TI k3 dma error handling fix
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Merge tag 'dmaengine-fix-5.6' of git://git.infradead.org/users/vkoul/slave-dma

Pull dmaengine fixes from Vinod Koul:
 "Late fixes in dmaengine for v5.6:

   - move .device_release missing log warning to debug

   - couple of maintainer entries for HiSilicon and IADX drivers

   - off-by-one fix for idxd driver

   - documentation warning fixes

   - TI k3 dma error handling fix"

* tag 'dmaengine-fix-5.6' of git://git.infradead.org/users/vkoul/slave-dma:
  dmaengine: ti: k3-udma-glue: Fix an error handling path in 'k3_udma_glue_cfg_rx_flow()'
  MAINTAINERS: Add maintainer for HiSilicon DMA engine driver
  dmaengine: idxd: fix off by one on cdev dwq refcount
  MAINTAINERS: rectify the INTEL IADX DRIVER entry
  dmaengine: move .device_release missing log warning to debug level
  docs: dmaengine: provider.rst: get rid of some warnings
2020-03-24 09:53:12 -07:00
Greg Kroah-Hartman
33e12f6e45 soundwire updates for v5.7-rc1
This contains updates to stream and pm handling in the core as well as
 updates to Intel drivers for hw sequencing and multi-link.
 
 Details:
 Core:
   - Updates to stream handling for state machine checks
   - Changes to handle potential races for probe/enumeration and init of the bus
   - Add no pm version of read and writes
   - Support for multiple Slave on same link
   - Add read_only_wordlength for simple/reduced ports
 
 Intel:
   - Updates to cadence lib to handle hw sequencing
   - Support for audio dai calls in intel driver
   - Multi link support for cadence lib
 
 Qualcomm:
   - Support for get_sdw_stream()
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Merge tag 'soundwire-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/soundwire into char-misc-next

Vinod writes:

soundwire updates for v5.7-rc1

This contains updates to stream and pm handling in the core as well as
updates to Intel drivers for hw sequencing and multi-link.

Details:
Core:
  - Updates to stream handling for state machine checks
  - Changes to handle potential races for probe/enumeration and init of the bus
  - Add no pm version of read and writes
  - Support for multiple Slave on same link
  - Add read_only_wordlength for simple/reduced ports

Intel:
  - Updates to cadence lib to handle hw sequencing
  - Support for audio dai calls in intel driver
  - Multi link support for cadence lib

Qualcomm:
  - Support for get_sdw_stream()

* tag 'soundwire-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/soundwire: (43 commits)
  soundwire: qcom: add support for get_sdw_stream()
  soundwire: stream: Add read_only_wordlength flag to port properties
  soundwire: cadence: clear FIFO to avoid pop noise issue on playback start
  soundwire: cadence: multi-link support
  soundwire: cadence: commit changes in the exit_reset() sequence
  soundwire: cadence: remove automatic command retries
  soundwire: cadence: remove PREQ_DELAY assignment
  soundwire: cadence: enable NORMAL operation in cdns_init()
  soundwire: cadence: reorder MCP_CONFIG settings
  soundwire: cadence: make SSP interval programmable
  soundwire: cadence: move clock/SSP related inits to dedicated function
  soundwire: cadence: merge routines to clear/set bits
  soundwire: cadence: mask Slave interrupt before stopping clock
  soundwire: cadence: fix a io timeout issue in S3 test
  soundwire: cadence: add clock_stop/restart routines
  soundwire: cadence: handle error cases with CONFIG_UPDATE
  soundwire: cadence: add interface to check clock status
  soundwire: cadence: simplifiy cdns_init()
  soundwire: cadence: s/update_config/config_update
  soundwire: stream: use sdw_write instead of update
  ...
2020-03-23 13:19:00 +01:00
Mauro Carvalho Chehab
c44166fe5f docs: prevent warnings due to autosectionlabel
Changeset 58ad30cf91 ("docs: fix reference to core-api/namespaces.rst")
enabled a new feature at Sphinx: it will now generate index for each
document title, plus to each chapter inside it.

There's a drawback, though: one document cannot have two sections
with the same name anymore.

A followup patch will change the logic of autosectionlabel to
avoid most creating references for every single section title,
but still we need to be able to reference the chapters inside
a document.

There are a few places where there are two chapters with the
same name. This patch renames one of the chapters, in order to
avoid symbol conflict within the same document.

PS.: as I don't speach Chinese, I had some help from a friend
(Wen Liu) at the Chinese translation for "publishing patches"
for this document:

	Documentation/translations/zh_CN/process/5.Posting.rst

Fixes: 58ad30cf91 ("docs: fix reference to core-api/namespaces.rst")
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/2bffb91e4a63d41bf5fae1c23e1e8b3bba0b8806.1584716446.git.mchehab+huawei@kernel.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-03-20 17:01:29 -06:00
Hans de Goede
e4c2c0ff00 firmware: Add new platform fallback mechanism and firmware_request_platform()
In some cases the platform's main firmware (e.g. the UEFI fw) may contain
an embedded copy of device firmware which needs to be (re)loaded into the
peripheral. Normally such firmware would be part of linux-firmware, but in
some cases this is not feasible, for 2 reasons:

1) The firmware is customized for a specific use-case of the chipset / use
with a specific hardware model, so we cannot have a single firmware file
for the chipset. E.g. touchscreen controller firmwares are compiled
specifically for the hardware model they are used with, as they are
calibrated for a specific model digitizer.

2) Despite repeated attempts we have failed to get permission to
redistribute the firmware. This is especially a problem with customized
firmwares, these get created by the chip vendor for a specific ODM and the
copyright may partially belong with the ODM, so the chip vendor cannot
give a blanket permission to distribute these.

This commit adds a new platform fallback mechanism to the firmware loader
which will try to lookup a device fw copy embedded in the platform's main
firmware if direct filesystem lookup fails.

Drivers which need such embedded fw copies can enable this fallback
mechanism by using the new firmware_request_platform() function.

Note that for now this is only supported on EFI platforms and even on
these platforms firmware_fallback_platform() only works if
CONFIG_EFI_EMBEDDED_FIRMWARE is enabled (this gets selected by drivers
which need this), in all other cases firmware_fallback_platform() simply
always returns -ENOENT.

Reported-by: Dave Olsthoorn <dave@bewaar.me>
Suggested-by: Peter Jones <pjones@redhat.com>
Acked-by: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20200115163554.101315-5-hdegoede@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-03-20 14:54:04 +01:00
Mauro Carvalho Chehab
e513de9936 scsi: docs: convert scsi_eh.txt to ReST
Link: https://lore.kernel.org/r/300314197f2e6a3258200711e825aa04c9e8ceaf.1583136624.git.mchehab+huawei@kernel.org
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-03-11 23:08:01 -04:00
Mauro Carvalho Chehab
99d1a38a73 docs: driver.rst: supress two ReSt warnings
Get rid of those, by marking a literal block as such:

	Documentation/driver-api/gpio/driver.rst:425: WARNING: Unexpected indentation.
	Documentation/driver-api/gpio/driver.rst:423: WARNING: Inline emphasis start-string without end-string.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/8356b02547087979f57cb71fbefb5e5f636c78f4.1583250595.git.mchehab+huawei@kernel.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-03-10 11:54:04 -06:00
Pragat Pandya
d1ce350015 Documentation: Add io_ordering.rst to driver-api manual
Add io_ordering.rst under Documentation/driver-api and reference it from
the Sphinx TOC Tree present in Documentation/driver-api/index.rst

Signed-off-by: Pragat Pandya <pragat.pandya@gmail.com>
Link: https://lore.kernel.org/r/20200303050301.5412-3-pragat.pandya@gmail.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-03-10 11:33:19 -06:00
Pragat Pandya
fcd6807271 Documentation: Add io-mapping.rst to driver-api manual
Add io-mapping.rst under Documentation/driver-api and reference it from
Sphinx TOC Tree present in Documentation/driver-api/index.rst

Signed-off-by: Pragat Pandya <pragat.pandya@gmail.com>
Link: https://lore.kernel.org/r/20200303050301.5412-2-pragat.pandya@gmail.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-03-10 11:33:15 -06:00
Jonathan Corbet
6505a18e66 docs: move core-api/ioctl.rst to driver-api/
The ioctl() documentation belongs with the rest of the driver-oriented
info, so move it there.

Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-03-10 11:21:08 -06:00
Greg Kroah-Hartman
8e567ed9e2 Merge 5.6-rc5 into usb-next
We need the USB fixes in here as well.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-03-10 08:12:46 +01:00
Heinrich Schuchardt
f9834f18f0 efi/libstub: Add libstub/mem.c to the documentation tree
Let the description of the efi/libstub/mem.c functions appear in the kernel
API documentation in the following chapters:

    The Linux driver implementer’s API guide
        Linux Firmware API
            UEFI Support
                UEFI stub library functions

Acked-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20200221035832.144960-1-xypron.glpk@gmx.de
Link: https://lore.kernel.org/r/20200308080859.21568-9-ardb@kernel.org
2020-03-08 09:58:13 +01:00
Mauro Carvalho Chehab
cf7da891b6 docs: dmaengine: provider.rst: get rid of some warnings
Get rid of those warnings by adding extra blank lines:

    Documentation/driver-api/dmaengine/provider.rst:270: WARNING: Unexpected indentation.
    Documentation/driver-api/dmaengine/provider.rst:273: WARNING: Block quote ends without a blank line; unexpected unindent.
    Documentation/driver-api/dmaengine/provider.rst:288: WARNING: Unexpected indentation.
    Documentation/driver-api/dmaengine/provider.rst:290: WARNING: Block quote ends without a blank line; unexpected unindent.

While here, use parenthesis after get_metadata_ptr/set_metadata_len,
as, if some day someone adds a kerneldoc markup for those, it
should automatically generate a cross-reference to them.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/62cf2a87b379a92c9c0e5a40c2ae8a138b01fe0a.1583250595.git.mchehab+huawei@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-03-06 19:06:32 +05:30
Linus Torvalds
6fd145da21 dmaengine fixes for v5.6-rc5
Bunch of driver fixes:
  - Doc updates to clean warnings for dmaengine
  - Fixes for newly added Intel idxd driver
  - More fixes for newly added TI k3-udma driver
  - Fixes for IMX and Tegra drivers.
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Merge tag 'dmaengine-fix-5.6-rc5' of git://git.infradead.org/users/vkoul/slave-dma

Pull dmaengine fixes from Vinod Koul:
 "A bunch of driver fixes:

   - Doc updates to clean warnings for dmaengine

   - Fixes for newly added Intel idxd driver

   - More fixes for newly added TI k3-udma driver

   - Fixes for IMX and Tegra drivers"

* tag 'dmaengine-fix-5.6-rc5' of git://git.infradead.org/users/vkoul/slave-dma:
  dmaengine: imx-sdma: Fix the event id check to include RX event for UART6
  dmaengine: tegra-apb: Prevent race conditions of tasklet vs free list
  dmaengine: tegra-apb: Fix use-after-free
  dmaengine: imx-sdma: fix context cache
  dmaengine: idxd: wq size configuration needs to check global max size
  dmaengine: idxd: sysfs input of wq incorrect wq type should return error
  dmaengine: coh901318: Fix a double lock bug in dma_tc_handle()
  dmaengine: idxd: correct reserved token calculation
  dmaengine: ti: k3-udma: Fix terminated transfer handling
  dmaengine: ti: k3-udma: Use the channel direction in pause/resume functions
  dmaengine: ti: k3-udma: Use the TR counter helper for slave_sg and cyclic
  dmaengine: ti: k3-udma: Move the TR counter calculation to helper function
  dmaengine: ti: k3-udma: Workaround for RX teardown with stale data in peer
  dmaengine: ti: k3-udma: Use ktime/usleep_range based TX completion check
  dmaengine: idxd: Fix error handling in idxd_wq_cdev_dev_setup()
  dmaengine: doc: fix warnings/issues of client.rst
  dmaengine: idxd: fix runaway module ref count on device driver bind
2020-03-05 12:19:34 -06:00
Greg Kroah-Hartman
24e6aea480 Merge 5.6-rc3 into usb-next
We need the USB fixes in here as well.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-02-24 08:48:49 +01:00
Jonathan Neuschäfer
320bfd91a9 docs: admin-guide: Move edid.rst from driver-api
This document describes actions that an admin can do, rather than
interfaces available to driver developers, so admin-guide seems to
be a more appropriate place for it.

Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-02-19 04:10:31 -07:00
Jonathan Neuschäfer
1733ec77d3 docs: driver-api: edid: Fix list formatting
Without the empty lines, Sphinx renders the list as part of the running
text.

Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-02-19 04:10:31 -07:00
Linus Torvalds
ab02b61f24 Minor bug fixes for IPMI
I know this is late; I've been travelling and, well, I've been
 distracted.
 
 This is just a few bug fixes and adding i2c support to the IPMB driver,
 which is something I wanted from the beginning for it.  It would be
 nice for the people doing IPMB to get this in.
 
 -corey
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Merge tag 'for-linus-5.6-1' of https://github.com/cminyard/linux-ipmi

Pull IPMI update from Corey Minyard:
 "Minor bug fixes for IPMI

  I know this is late; I've been travelling and, well, I've been
  distracted.

  This is just a few bug fixes and adding i2c support to the IPMB
  driver, which is something I wanted from the beginning for it"

* tag 'for-linus-5.6-1' of https://github.com/cminyard/linux-ipmi:
  drivers: ipmi: fix off-by-one bounds check that leads to a out-of-bounds write
  ipmi:ssif: Handle a possible NULL pointer reference
  drivers: ipmi: Modify max length of IPMB packet
  drivers: ipmi: Support raw i2c packet in IPMB
2020-02-16 13:05:46 -08:00
Changbin Du
83c49f7344 dmaengine: doc: fix warnings/issues of client.rst
This fixed some warnings/issues of client.rst.
 o Need a blank line for enumerated lists.
 o Do not create section in enumerated list.
 o Remove suffix ':' from section title.

Signed-off-by: Changbin Du <changbin.du@gmail.com>
Link: https://lore.kernel.org/r/20200204125115.12128-1-changbin.du@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-02-13 20:35:24 +05:30
Pierre-Louis Bossart
5952880771 soundwire: stream: update state machine and add state checks
The state machine and notes don't accurately explain or allow
transitions from STREAM_DEPREPARED and STREAM_DISABLED.

Add more explanations and allow for more transitions as a result of a
trigger_stop(), trigger_suspend() and prepare(), depending on the
ALSA/ASoC layer behavior defined by the INFO_RESUME and INFO_PAUSE
flags.

Also add basic checks to help debug inconsistent states and illegal
state machine transitions.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200114235227.14502-2-pierre-louis.bossart@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-02-13 15:57:37 +05:30
Heikki Krogerus
bbe80c9a89 usb: typec: altmode: Remove the notification chain
Using the generic notification chain is not reasonable with
the alternate modes because it would require dependencies
between the drivers of the components that need the
notifications, and the typec drivers.

There are no users for the alternate mode notifications, so
removing the chain and the API for it completely.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20200211112531.86510-6-heikki.krogerus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-02-12 10:51:21 -08:00
Linus Torvalds
18ea671ba4 dmaengine fixes for v5.6-rc1
Fixes for:
  - Documentation build error fix
  - Fix dma_request_chan() error return
  - Remove unneeded conversion in idxd driver
  - Fix pointer check for dma_async_device_channel_register()
  - Fix slave-channel symlink cleanup
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Merge tag 'dmaengine-fix-5.6-rc1' of git://git.infradead.org/users/vkoul/slave-dma

Pull dmaengine fixes from Vinod Koul:
 "Fixes for:

   - Documentation build error fix

   - Fix dma_request_chan() error return

   - Remove unneeded conversion in idxd driver

   - Fix pointer check for dma_async_device_channel_register()

   - Fix slave-channel symlink cleanup"

* tag 'dmaengine-fix-5.6-rc1' of git://git.infradead.org/users/vkoul/slave-dma:
  dmaengine: Cleanups for the slave <-> channel symlink support
  dmaengine: fix null ptr check for __dma_async_device_channel_register()
  dmaengine: idxd: fix boolconv.cocci warnings
  dmaengine: Fix return value for dma_request_chan() in case of failure
  dmaengine: doc: Properly indent metadata title
2020-02-05 18:07:39 +00:00
Linus Torvalds
68b62e5d96 - Fix a SEVERE docs build failure for cpu idle cooling device (Randy Dunlap)
- Fix a spelling mistake in the error message for the stm32 (Colin Ian King)
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Merge tag 'thermal-v5.6-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/thermal/linux

Pull thermal fixes from Daniel Lezcano:

 - Fix a severe docs build failure for cpu idle cooling device (Randy
   Dunlap)

 - Fix a spelling mistake in the error message for the stm32 (Colin Ian
   King)

* tag 'thermal-v5.6-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/thermal/linux:
  thermal: stm32: fix spelling mistake "preprare" -> "prepare"
  Documentation: cpu-idle-cooling: fix a SEVERE docs build failure
2020-01-31 14:39:21 -08:00
Randy Dunlap
fe27f13d67 Documentation: cpu-idle-cooling: fix a SEVERE docs build failure
Sphinx ('make htmldocs') stops with a SEVERE error:

Sphinx parallel build error:
SystemMessage: /home/rdunlap/lnx/next/linux-next-20200120/Documentation/driver-api/thermal/cpu-idle-cooling.rst:69: (SEVERE/4) Unexpected section title.

^
|

so fix the .rst file so that the SEVERE build error does not happen.
Also fix another minor formatting warning (unexpected unindent).

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Amit Kucheria <amit.kucheria@verdurent.com>
Cc: linux-pm@vger.kernel.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/712c1152-56b5-307f-b3f3-ed03a30b804a@infradead.org
2020-01-31 10:50:33 +01:00
Linus Torvalds
701a9c8092 Char/Misc driver changes for 5.6-rc1
Here is the big char/misc/whatever driver changes for 5.6-rc1
 
 Included in here are loads of things from a variety of different driver
 subsystems:
 	- soundwire updates
 	- binder updates
 	- nvmem updates
 	- firmware drivers updates
 	- extcon driver updates
 	- various misc driver updates
 	- fpga driver updates
 	- interconnect subsystem and driver updates
 	- bus driver updates
 	- uio driver updates
 	- mei driver updates
 	- w1 driver cleanups
 	- various other small driver updates
 
 All of these have been in linux-next for a while with no reported
 issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc driver updates from Greg KH:
 "Here is the big char/misc/whatever driver changes for 5.6-rc1

  Included in here are loads of things from a variety of different
  driver subsystems:
   - soundwire updates
   - binder updates
   - nvmem updates
   - firmware drivers updates
   - extcon driver updates
   - various misc driver updates
   - fpga driver updates
   - interconnect subsystem and driver updates
   - bus driver updates
   - uio driver updates
   - mei driver updates
   - w1 driver cleanups
   - various other small driver updates

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'char-misc-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (86 commits)
  mei: me: add jasper point DID
  char: hpet: Use flexible-array member
  binder: fix log spam for existing debugfs file creation.
  mei: me: add comet point (lake) H device ids
  nvmem: add QTI SDAM driver
  dt-bindings: nvmem: add binding for QTI SPMI SDAM
  dt-bindings: imx-ocotp: Add i.MX8MP compatible
  dt-bindings: soundwire: fix example
  soundwire: cadence: fix kernel-doc parameter descriptions
  soundwire: intel: report slave_ids for each link to SOF driver
  siox: Use the correct style for SPDX License Identifier
  w1: omap-hdq: Simplify driver with PM runtime autosuspend
  firmware: stratix10-svc: Remove unneeded semicolon
  firmware: google: Probe for a GSMI handler in firmware
  firmware: google: Unregister driver_info on failure and exit in gsmi
  firmware: google: Release devices before unregistering the bus
  slimbus: qcom: add missed clk_disable_unprepare in remove
  slimbus: Use the correct style for SPDX License Identifier
  slimbus: qcom-ngd-ctrl: Use dma_request_chan() instead dma_request_slave_channel()
  dt-bindings: SLIMBus: add slim devices optional properties
  ...
2020-01-29 10:35:54 -08:00
Linus Torvalds
6ba3d7066c This is the bulk of pin control changes for the v5.6 kernel cycle:
Core changes:
 
 - Dropped the chained IRQ setup callback into GPIOLIB as we
   got rid of the last users of that in this changeset.
 
 New drivers:
 
 - New driver for Ingenic X1830.
 
 - New driver for Freescale i.MX8MP.
 
 Driver enhancements:
 
 - Fix all remaining Intel drivers to pass their IRQ chips
   along with the GPIO chips.
 
 - Intel Baytrail allocates its irqchip dynamically.
 
 - Intel Lynxpoint is thoroughly rewritten and modernized.
 
 - Aspeed AST2600 pin muxing and configuration is much
   improved.
 
 - Qualcomm SC7180 functions are updated and wakeup interrupt
   map is provided.
 
 - A whole slew of Renesas SH-PFC cleanups and improvements.
 
 - Fix up the Intel DT bindings to use the generic YAML
   DT bindings schema. (A first user of this.)
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Merge tag 'pinctrl-v5.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl

Pull pin control updates from Linus Walleij:
 "This is the bulk of pin control changes, nothing too exciting about
  this.

  Some changes hit arch/sh and arch/arm but are well isolated and
  acknowledged by the respective arch maintainers.

  Core changes:

   - Dropped the chained IRQ setup callback into GPIOLIB as we got rid
     of the last users of that in this changeset.

  New drivers:

   - New driver for Ingenic X1830.

   - New driver for Freescale i.MX8MP.

  Driver enhancements:

   - Fix all remaining Intel drivers to pass their IRQ chips along with
     the GPIO chips.

   - Intel Baytrail allocates its irqchip dynamically.

   - Intel Lynxpoint is thoroughly rewritten and modernized.

   - Aspeed AST2600 pin muxing and configuration is much improved.

   - Qualcomm SC7180 functions are updated and wakeup interrupt map is
     provided.

   - A whole slew of Renesas SH-PFC cleanups and improvements.

   - Fix up the Intel DT bindings to use the generic YAML DT bindings
     schema (a first user of this)"

* tag 'pinctrl-v5.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (99 commits)
  pinctrl: madera: Remove extra blank line
  pinctrl: qcom: Don't lock around irq_set_irq_wake()
  pinctrl: mvebu: armada-37xx: use use platform api
  gpio: Drop the chained IRQ handler assign function
  pinctrl: freescale: Add i.MX8MP pinctrl driver support
  dt-bindings: imx: Add pinctrl binding doc for i.MX8MP
  pinctrl: tigerlake: Tiger Lake uses _HID enumeration
  pinctrl: sunrisepoint: Add Coffee Lake-S ACPI ID
  pinctrl: iproc: Use platform_get_irq_optional() to avoid error message
  pinctrl: dt-bindings: Fix some errors in the lgm and pinmux schema
  pinctrl: intel: Pass irqchip when adding gpiochip
  pinctrl: intel: Add GPIO <-> pin mapping ranges via callback
  pinctrl: baytrail: Replace WARN with dev_info_once when setting direct-irq pin to output
  pinctrl: baytrail: Do not clear IRQ flags on direct-irq enabled pins
  pinctrl: sunrisepoint: Add missing Interrupt Status register offset
  pinctrl: sh-pfc: Split R-Car H3 support in two independent drivers
  pinctrl: artpec6: fix __iomem on reg in set
  pinctrl: ingenic: Use devm_platform_ioremap_resource()
  pinctrl: ingenic: Factorize irq_set_type function
  pinctrl: ingenic: Remove duplicated ingenic_chip_info structures
  ...
2020-01-29 09:51:36 -08:00
Linus Torvalds
fa889d8555 This is the bulk of GPIO changes for the v5.6 kernel cycle
Core changes:
 
 - Document the usecases for the kernelspace vs userspace
   handling of GPIOs.
 
 - Handle MSI (message signalled interrupts) properly in the
   core hierarchical irqdomain code.
 
 - Fix a rare race condition while initializing the descriptor
   array.
 
 New drivers:
 
 - Xylon LogiCVC GPIO driver.
 
 - WDC934x GPIO controller driver.
 
 Driver improvements:
 
 - Implemented suspend/resume in the Tegra driver.
 
 - MPC8xx edge detection fixup.
 
 - Properly convert ThunderX to use hierarchical irqdomain
   with GPIOLIB_IRQCHIP on top of the revert of the previous
   buggy switchover. This time it works (hopefully).
 
 Misc:
 
 - Drop a FMC remnant file <linux/ipmi-fru.h>
 
 - A slew of fixes.
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Merge tag 'gpio-v5.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO updates from Linus Walleij:
 "This is the bulk of GPIO changes for the v5.6 kernel cycle.

  This is a pretty calm cycle so far, nothing special going on really.
  Some more changes will come in from the irqchip and pin control trees.

  I also deleted an orphan include file for FMC that was dangling since
  subsystem was removed.

  Core changes:

   - Document the usecases for the kernelspace vs userspace handling of
     GPIOs.

   - Handle MSI (message signalled interrupts) properly in the core
     hierarchical irqdomain code.

   - Fix a rare race condition while initializing the descriptor array.

  New drivers:

   - Xylon LogiCVC GPIO driver.

   - WDC934x GPIO controller driver.

  Driver improvements:

   - Implemented suspend/resume in the Tegra driver.

   - MPC8xx edge detection fixup.

   - Properly convert ThunderX to use hierarchical irqdomain with
     GPIOLIB_IRQCHIP on top of the revert of the previous buggy
     switchover. This time it works (hopefully).

  Misc:

   - Drop a FMC remnant file <linux/ipmi-fru.h>

   - A slew of fixes"

* tag 'gpio-v5.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (48 commits)
  MAINTAINERS: Replace Tien Hock Loh as Altera PIO maintainer
  gpiolib: hold gpio devices lock until ->descs array is initialised
  gpio: aspeed-sgpio: fixed typos
  gpio: mvebu: clear irq in edge cause register before unmask edge irq
  gpiolib: Lower verbosity when allocating hierarchy irq
  gpiolib: Remove duplicated function gpio_do_set_config()
  gpio: Fix the no return statement warning
  gpio: wcd934x: Add support to wcd934x gpio controller
  gpiolib: remove set but not used variable 'config'
  gpio: vx855: fixed a typo
  gpio: mockup: sort headers alphabetically
  gpio: mockup: update the license tag
  gpio: Remove the unused flags
  gpiolib: Set lockdep class for hierarchical irq domains
  gpio: thunderx: Switch to GPIOLIB_IRQCHIP
  gpiolib: Add the support for the msi parent domain
  gpiolib: Add support for the irqdomain which doesn't use irq_fwspec as arg
  gpio: Add use guidance documentation
  dt-bindings: gpio: wcd934x: Add bindings for gpio
  gpio: altera: change to platform_get_irq_optional to avoid false-positive error
  ...
2020-01-29 09:43:39 -08:00
Linus Torvalds
abb22e44cf - Depromote debug print on the db8500 platform (Linus Walleij)
- Fix compilation warning when compiling with make W=1 (Amit Kucheria)
 
 - Code cleanup and refactoring, regmap conversion and add hwmon
   support on Qoriq (Andrey Smirnov)
 
 - Add an idle injection cpu cooling device and its documentation,
   rename the cpu_cooling device to cpufreq_cooling device (Daniel
   Lezcano)
 
 - Convert unexported functions to static, add the __init annotation in
   the thermal-of code and remove the pointless wrapper functions
   (Daniel Lezcano)
 
 - Fix register offset for Armada XP and register reset bit
   initialization (Zak Hays)
 
 - Enable hwmon on the rockchip (Stefan Schaeckeler)
 
 - Add the thermal sensor for the H6/H5/H3/A64/A83T/R40 sun8i platform
   and their device tree bindings, followed by a fix for the ths number
   and the sparse warnings (Yangtao Li)
 
 - Code cleansup for the sun8i and hwmon support (Yangtao Li)
 
 - Silent some messages which are misleading given the changes made in
   the previous version on generic-adc (Martin Blumenstingl)
 
 - Rename exynos to Exynos (Krzysztof Kozlowski)
 
 - Add the bcm2711 thermal driver with the device tree bindings (Stefan
   Wahren)
 
 - Use usleep_range() instead of udelay() as the call is always done in
   a sleep-able context (Geert Uytterhoeven)
 
 - Do code cleanup and re-organization to set the scene for a new
   process for the brcmstb (Florian Fainelli)
 
 - Fix bindings check issues on brcm (Stefan Wahren)
 
 - Add Jasper Lake support on int340x (Nivedita Swaminathan)
 
 - Add Comet Lake support on intel pch (Gayatri Kammela)
 
 - Fix unmatched pci_release_region() on x86 (Chuhong Yuan)
 
 - Remove temperature boundaries for rcar and rcar3 (Niklas Söderlund)
 
 - Fix return value to -ENODEV when thermal_zone_of_sensor_register()
   is called with the of-node is missing (Peter Mamonov)
 
 - Code cleanup, interrupt bouncing, and better support on stm32
   (Pascal Paillet)
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Merge tag 'thermal-v5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thermal/linux

Pull thermal updates from Daniel Lezcano:

 - Depromote debug print on the db8500 platform (Linus Walleij)

 - Fix compilation warning when compiling with make W=1 (Amit Kucheria)

 - Code cleanup and refactoring, regmap conversion and add hwmon support
   on Qoriq (Andrey Smirnov)

 - Add an idle injection cpu cooling device and its documentation,
   rename the cpu_cooling device to cpufreq_cooling device (Daniel
   Lezcano)

 - Convert unexported functions to static, add the __init annotation in
   the thermal-of code and remove the pointless wrapper functions
   (Daniel Lezcano)

 - Fix register offset for Armada XP and register reset bit
   initialization (Zak Hays)

 - Enable hwmon on the rockchip (Stefan Schaeckeler)

 - Add the thermal sensor for the H6/H5/H3/A64/A83T/R40 sun8i platform
   and their device tree bindings, followed by a fix for the ths number
   and the sparse warnings (Yangtao Li)

 - Code cleansup for the sun8i and hwmon support (Yangtao Li)

 - Silent some messages which are misleading given the changes made in
   the previous version on generic-adc (Martin Blumenstingl)

 - Rename exynos to Exynos (Krzysztof Kozlowski)

 - Add the bcm2711 thermal driver with the device tree bindings (Stefan
   Wahren)

 - Use usleep_range() instead of udelay() as the call is always done in
   a sleep-able context (Geert Uytterhoeven)

 - Do code cleanup and re-organization to set the scene for a new
   process for the brcmstb (Florian Fainelli)

 - Fix bindings check issues on brcm (Stefan Wahren)

 - Add Jasper Lake support on int340x (Nivedita Swaminathan)

 - Add Comet Lake support on intel pch (Gayatri Kammela)

 - Fix unmatched pci_release_region() on x86 (Chuhong Yuan)

 - Remove temperature boundaries for rcar and rcar3 (Niklas Söderlund)

 - Fix return value to -ENODEV when thermal_zone_of_sensor_register() is
   called with the of-node is missing (Peter Mamonov)

 - Code cleanup, interrupt bouncing, and better support on stm32 (Pascal
   Paillet)

* tag 'thermal-v5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thermal/linux: (66 commits)
  thermal: stm32: Fix low threshold interrupt flood
  thermal: stm32: Improve temperature computing
  thermal: stm32: Handle multiple trip points
  thermal: stm32: Disable interrupts at probe
  thermal: stm32: Rework sensor mode management
  thermal: stm32: Fix icifr register name
  thermal: of: Make thermal_zone_of_sensor_register return -ENODEV if a sensor OF node is missing
  thermal: rcar_gen3_thermal: Remove temperature bound
  thermal: rcar_thermal: Remove temperature bound
  thermal: intel: intel_pch_thermal: Add Comet Lake (CML) platform support
  thermal: intel: Fix unmatched pci_release_region
  thermal: int340x: processor_thermal: Add Jasper Lake support
  dt-bindings: brcm,avs-ro-thermal: Fix binding check issues
  thermal: brcmstb_thermal: Register different ops per process
  thermal: brcmstb_thermal: Restructure interrupt registration
  thermal: brcmstb_thermal: Add 16nm process thermal parameters
  dt-bindings: thermal: Define BCM7216 thermal sensor compatible
  thermal: brcmstb_thermal: Prepare to support a different process
  thermal: brcmstb_thermal: Do not use DT coefficients
  thermal: rcar_thermal: Use usleep_range() instead of udelay()
  ...
2020-01-28 16:31:08 -08:00
Vinod Koul
08607e8319 dmaengine: doc: Properly indent metadata title
The newly added metadata documentation title was not properly indented
resulting in doc build break:

  Sphinx parallel build error:
  docutils.utils.SystemMessage: /linux/Documentation/driver-api/dmaengine/client.rst:155: (SEVERE/4) Unexpected section title.

  Optional: per descriptor metadata
  ---------------------------------

Fix this by doing the right indent

Reported-by: Michael Ellerman <mpe@ellerman.id.au>
Fixes: 7d083ae983 ("dmaengine: doc: Add sections for per descriptor metadata support")
Link: https://lore.kernel.org/r/20200128125032.1650816-1-vkoul@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-01-28 18:33:39 +05:30
Linus Torvalds
6a1000bd27 ioremap changes for 5.6
- remove ioremap_nocache given that is is equivalent to
    ioremap everywhere
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Merge tag 'ioremap-5.6' of git://git.infradead.org/users/hch/ioremap

Pull ioremap updates from Christoph Hellwig:
 "Remove the ioremap_nocache API (plus wrappers) that are always
  identical to ioremap"

* tag 'ioremap-5.6' of git://git.infradead.org/users/hch/ioremap:
  remove ioremap_nocache and devm_ioremap_nocache
  MIPS: define ioremap_nocache to ioremap
2020-01-27 13:03:00 -08:00
Krzysztof Kozlowski
ca07ee4e3d thermal: exynos: Rename Samsung and Exynos to lowercase
Fix up inconsistent usage of upper and lowercase letters in "Samsung"
and "Exynos" names.

"SAMSUNG" and "EXYNOS" are not abbreviations but regular trademarked
names.  Therefore they should be written with lowercase letters starting
with capital letter.

The lowercase "Exynos" name is promoted by its manufacturer Samsung
Electronics Co., Ltd., in advertisement materials and on website.

Although advertisement materials usually use uppercase "SAMSUNG", the
lowercase version is used in all legal aspects (e.g. on Wikipedia and in
privacy/legal statements on
https://www.samsung.com/semiconductor/privacy-global/).

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20200104152107.11407-7-krzk@kernel.org
2020-01-27 10:24:32 +01:00
Daniel Lezcano
23affa2e29 thermal/drivers/cpu_cooling: Rename to cpufreq_cooling
As we introduced the idle injection cooling device called
cpuidle_cooling, let's be consistent and rename the cpu_cooling to
cpufreq_cooling as this one mitigates with OPPs changes.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org>
Link: https://lore.kernel.org/r/20191219225317.17158-3-daniel.lezcano@linaro.org
2020-01-27 10:24:32 +01:00
Daniel Lezcano
0a1990a2d1 thermal/drivers/cpu_cooling: Add idle cooling device documentation
Provide some documentation for the idle injection cooling effect in
order to let people to understand the rational of the approach for the
idle injection CPU cooling device.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Link: https://lore.kernel.org/r/20191219225317.17158-1-daniel.lezcano@linaro.org
2020-01-27 10:24:32 +01:00
Linus Walleij
72780ce5f1 gpio: Drop the chained IRQ handler assign function
gpiochip_set_chained_irqchip() would assign a chained handler
to a GPIO chip. We now populate struct gpio_irq_chip for all
chained GPIO irqchips so drop this function.

Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20200113220800.77817-1-linus.walleij@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-01-23 15:54:32 +01:00
Peter Ujfalusi
7d083ae983 dmaengine: doc: Add sections for per descriptor metadata support
Update the provider and client documentation with details about the
metadata support.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Reviewed-by: Tero Kristo <t-kristo@ti.com>
Tested-by: Keerthy <j-keerthy@ti.com>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Link: https://lore.kernel.org/r/20191223110458.30766-4-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-01-21 11:06:12 +05:30
Linus Walleij
ddb4e53fc7 gpio: Add use guidance documentation
The text in this new document is a response to recurring questions
about the GPIO in-kernel API vs the userspace ABI. When do you use
one or the other? It can be a bit intuitive, but I tried to sum it
all up.

Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Link: https://lore.kernel.org/r/20200108001712.47500-1-linus.walleij@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-01-15 11:11:43 +01:00