DB8540 support was removed in commit b6d09f780761 ("pinctrl: nomadik:
Drop U8540/9540 support"), but a couple small pieces of related code
remained in <gpio/gpio-nomadik.h>. Remove them.

Discovered while searching for CONFIG_* symbols referenced in code but
not defined in any Kconfig file.

Signed-off-by: Ethan Nelson-Moore <enelsonmoore@gmail.com>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Link: https://patch.msgid.link/20260610205007.44881-1-enelsonmoore@gmail.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>

On some regmapped GPIOs apparently only a sparser selection of the lines
(not all) are actually fixed direction.

Support this situation by adding an optional bitmap indicating which
GPIOs are actually fixed direction and which are not.

Link: https://lore.kernel.org/linux-gpio/20260501155421.3329862-10-elder@riscstar.com/
Tested-by: Alex Elder <elder@riscstar.com>
Signed-off-by: Linus Walleij <linusw@kernel.org>
Reviewed-by: Michael Walle <mwalle@kernel.org>
Reviewed-by: Alex Elder <elder@riscstar.com>
Link: https://patch.msgid.link/20260511-regmap-gpio-sparse-fixed-dir-v3-1-1429ec453be7@kernel.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>

Immutable branch betweeb the GPIO and I2C trees for v7.2-rc1

- add the gpiod_is_single_ended() helper function

The direction of a single-ended (open-drain or open-source) GPIO line
cannot always be reliably determined by reading hardware registers.
In true open-drain implementations, the "high" state is achieved by
entering a high-impedance mode, which many hardware controllers report
as "input" even if the software intends to use it as an output.

This creates issues for consumer drivers (like I2C) that rely on
gpiod_get_direction() to decide if a line can be driven.

Introduce gpiod_is_single_ended() to allow consumers to check the
software configuration (GPIO_FLAG_OPEN_DRAIN/GPIO_FLAG_OPEN_SOURCE) of
a descriptor. This provides a robust way to identify lines that are
capable of being driven, regardless of their instantaneous hardware state.

Signed-off-by: Jie Li <jie.i.li@nokia.com>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Link: https://patch.msgid.link/20260511113726.49041-2-jie.i.li@nokia.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>

Immutable branch between the GPIO and PCI trees for v7.2

- add fwnode_gpiod_get() helper to GPIOLIB

Add fwnode_gpiod_get() as a convenience wrapper around
fwnode_gpiod_get_index() for the common case where only the
first GPIO is required.

This mirrors existing gpiod_get() and devm_gpiod_get() helpers
and avoids open-coding index 0 at call sites.

Suggested-by: Manivannan Sadhasivam <mani@kernel.org>
Acked-by: Manivannan Sadhasivam <mani@kernel.org>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Acked-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@oss.qualcomm.com>
Link: https://patch.msgid.link/20260511-wakeirq_support-v10-1-c10af9c9eb8c@oss.qualcomm.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>

Split the old contents from gpio.h for clarity. Ideally any driver
that still includes linux/gpio.h can now be ported over to use
either linux/gpio/legacy.h or linux/gpio/consumer.h, with the
original file getting removed once that is complete.

No functional changes intended for now.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://patch.msgid.link/20260428154522.2861492-1-arnd@kernel.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>

Pull gpio updates from Bartosz Golaszewski:
 "For this merge window we have two new drivers: support for
  GPIO-signalled ACPI events on Intel platforms and a generic
  GPIO-over-pinctrl driver using the ARM SCMI protocol for
  controlling pins.

  Several things have been reworked in GPIO core: we unduplicated GPIO
  hog handling, reduced the number of SRCU locks and dereferences,
  improved support for software-node-based lookup and removed more
  legacy code after converting remaining users to modern alternatives.

  There's also a number of driver reworks and refactoring, documentation
  updates, some bug-fixes and new tests.

  GPIO core:
   - defer probe on software node lookups when the remote software node
     exists but has not been registered as a firmware node yet
   - unify GPIO hog handling by moving code duplicated in OF and ACPI
     modules into GPIO core and allow setting up hogs with software
     nodes
   - allow matching GPIO controllers by secondary firmware node if
     matching by primary does not succeed
   - demote deferral warnings to debug level as they are quite normal
     when using software nodes which don't support fw_devlink yet
   - disable the legacy GPIO character device uAPI v1 supprt in Kconfig
     by default
   - rework several core functions in preparation for the upcoming
     Revocable helper library for protecting resources against sudden
     removal, this reduces the number of SRCU dereferences in GPIO core
   - simplify file descriptor logic in GPIO character device code by
     using FD_PREPARE()
   - introduce a header defining symbols used by both GPIO consumers and
     providers to avoid having to include provider-specific headers from
     drivers which only consume GPIOs
   - replace snprintf() with strscpy() where formatting is not required

  New drivers:
   - add the gpio-by-pinctrl generic driver using the ARM SCMI protocol
     to control GPIOs (along with SCMI changes pulled from the pinctrl
     tree)
   - add a driver providing support for handling of platform events via
     GPIO-signalled ACPI events (used on Intel Nova Lake and later
     platforms)

  Driver changes:
   - extend the gpio-kempld driver with support for more recent models,
     interrupts and setting/getting multiple values at once
   - improve interrupt handling in gpio-brcmstb
   - add support for multi-SoC systems in gpio-tegra186
   - make sure we return correct values from the .get() callbacks in
     several GPIO drivers by normalizing any values other than 0, 1 or
     negative error numbers
   - use flexible arrays in several drivers to reduce the number of
     required memory allocations
   - simplify synchronous waiting for virtual drivers to probe and
     remove the dedicated, a bit overengineered helper library
     dev-sync-probe
   - remove unneeded Kconfig dependencies on OF_GPIO in several drivers
     and subsystems
   - convert the two remaining users of of_get_named_gpio() to using
     GPIO descriptors and remove the (no longer used) function along
     with the header that declares it
   - add missing includes in gpio-mmio
   - shrink and simplify code in gpio-max732x by using guard(mutex)
   - remove duplicated code handling the 'ngpios' property from
     gpio-ts4800, it's already handled in GPIO core
   - use correct variable type in gpio-aspeed
   - add support for a new model in gpio-realtek-otto
   - allow to specify the active-low setting of simulated hogs over the
     configfs interface (in addition to existing devicetree support) in
     gpio-sim

  Bug fixes:
   - clear the OF_POPULATED flag on hog nodes in GPIO chip remove path
     on OF systems
   - fix resource leaks in error path in gpiochip_add_data_with_key()
   - drop redundant device reference in gpio-mpsse

  Tests:
   - add selftests for use-after-free cases in GPIO character device
     code

  DT bindings:
   - add a DT binding document for SCMI based, gpio-over-pinctrl devices
   - fix interrupt description in microchip,mpfs-gpio
   - add new compatible for gpio-realtek-otto
   - describe the resets of the mpfs-gpio controller
   - fix maintainer's email in gpio-delay bindings
   - remove the binding document for cavium,thunder-8890 as the
     corresponding device is bound over PCI and not firmware nodes

  Documentation:
   - update the recommended way of converting legacy boards to using
     software nodes for GPIO description
   - describe GPIO line value semantics
   - misc updates to kerneldocs

  Misc:
   - convert OMAP1 ams-delta board to using GPIO hogs described with
     software nodes"

* tag 'gpio-updates-for-v7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux: (79 commits)
  gpio: swnode: defer probe on references to unregistered software nodes
  dt-bindings: gpio: cavium,thunder-8890: Remove DT binding
  Documentation: gpio: update the preferred method for using software node lookup
  gpio: gpio-by-pinctrl: s/used to do/is used to do/
  gpio: aspeed: fix unsigned long int declaration
  gpio: rockchip: convert to dynamic GPIO base allocation
  gpio: remove dev-sync-probe
  gpio: virtuser: stop using dev-sync-probe
  gpio: aggregator: stop using dev-sync-probe
  gpio: sim: stop using dev-sync-probe
  gpio: Add Intel Nova Lake ACPI GPIO events driver
  gpiolib: Make deferral warnings debug messages
  gpiolib: fix hogs with multiple lines
  gpio: fix up CONFIG_OF dependencies
  gpio: gpio-by-pinctrl: add pinctrl based generic GPIO driver
  gpio: dt-bindings: Add GPIO on top of generic pin control
  firmware: arm_scmi: Allow PINCTRL_REQUEST to return EOPNOTSUPP
  pinctrl: scmi: ignore PIN_CONFIG_PERSIST_STATE
  pinctrl: scmi: Delete PIN_CONFIG_OUTPUT_IMPEDANCE_OHMS support
  pinctrl: scmi: Add SCMI_PIN_INPUT_VALUE
  ...

With no more users, remove legacy machine hog API from the kernel.

Reviewed-by: Linus Walleij <linusw@kernel.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/20260309-gpio-hog-fwnode-v2-5-4e61f3dbf06a@oss.qualcomm.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>

It is not clearly documented that the GPIO driver API expect the
driver to get/set the physical level of the GPIO line and the
consumer API will get/set the logic level. Document this in
relevant places.

Reported-by: David Jander <david@protonic.nl>
Signed-off-by: Linus Walleij <linusw@kernel.org>
Link: https://patch.msgid.link/20260306-gpio-doc-levels-v1-1-19928739e400@kernel.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>