linux-toradex.git/drivers/gpio/TODO, branch master

gpio: remove of_get_named_gpio() and

2026-03-09T09:25:34+00:00

All in-tree consumers have been converted to the descriptor-based API.
Remove the deprecated of_get_named_gpio() helper, delete the
 header, and drop the corresponding entry from
MAINTAINERS.

Also remove the completed TODO item for this cleanup.

Signed-off-by: Jialu Xu 
Reviewed-by: Linus Walleij 
Link: https://patch.msgid.link/02ABDA1F9E3FAF1F+20260307030623.3495092-6-xujialu@vimux.org
Signed-off-by: Bartosz Golaszewski

gpiolib: of: Get rid of

2025-10-16T14:47:18+00:00

Last user of linux/gpio/legacy-of-mm-gpiochip.h is gone.

Remove linux/gpio/legacy-of-mm-gpiochip.h and
CONFIG_OF_GPIO_MM_GPIOCHIP

Signed-off-by: Christophe Leroy 
Signed-off-by: Bartosz Golaszewski

gpio: move gpio-mmio-specific fields out of struct gpio_chip

2025-09-12T07:22:45+00:00

With all users of bgpio_init() converted to using the modernized generic
GPIO chip API, we can now move the gpio-mmio-specific fields out of
struct gpio_chip and into the dedicated struct gpio_generic_chip. To
that end: adjust the gpio-mmio driver to the new layout, update the
docs, etc.

The changes in gpio-mlxbf2.c and gpio-mpc8xxx.c are here and not in their
respective conversion commits because the former passes the address of
the generic chip's lock to the __releases() annotation and we cannot
really hide it while gpio-mpc8xxx.c accesses the shadow registers in a
driver-specific workaround and there's no reason to make them available
in a public API.

Also: drop the relevant task from TODO as it's now done.

Reviewed-by: Linus Walleij 
Link: https://lore.kernel.org/r/20250910-gpio-mmio-gpio-conv-part4-v2-15-f3d1a4c57124@linaro.org
Signed-off-by: Bartosz Golaszewski

gpio: TODO: remove the task for converting to the new line setters

2025-08-11T13:03:57+00:00

The task is complete, but this was not reflected in the TODO file.

Fixes: d9d87d90cc0b10cd ("treewide: rename GPIO set callbacks back to their original names")
Signed-off-by: Geert Uytterhoeven 
Link: https://lore.kernel.org/r/417af7e5a110c527eb759289bd5d2fd6885f4e01.1754917104.git.geert+renesas@glider.be
Signed-off-by: Bartosz Golaszewski

gpio: TODO: remove the task for the sysfs rework

2025-07-16T08:27:08+00:00

Remove the completed task tracking the rework of the sysfs interface and
add a new task to track the removal of the legacy bits and pieces.

Reviewed-by: Linus Walleij 
Link: https://lore.kernel.org/r/20250704-gpio-sysfs-chip-export-v4-10-9289d8758243@linaro.org
Signed-off-by: Bartosz Golaszewski

gpio: TODO: add a task for removing MMIO-specific fields from gpio_chip

2025-06-10T09:41:01+00:00

Currently for CONFIG_GPIO_GENERIC=y each struct gpio_chip object
contains the fields relevant only for gpio-mmio users. It's not an
insignificant number either as it's several pointers and integers.

It makes sense to remove these fields from struct gpio_chip into a
dedicated structure but this is not trivial due to how the bgpio_init()
function is implemented.

Add a task for tracking this rework.

Reviewed-by: Linus Walleij 
Link: https://lore.kernel.org/r/20250527111353.71540-1-brgl@bgdev.pl
Signed-off-by: Bartosz Golaszewski

Merge tag 'gpio-updates-for-v6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux

2025-05-27T22:22:01+00:00

Pull gpio updates from Bartosz Golaszewski:
 "We have three new drivers, some refactoring in the GPIO core, lots of
  various changes across many drivers, new configfs interface for the
  virtual gpio-aggregator module and DT-bindings updates.

  The treewide conversion of GPIO drivers to using the new value setter
  callbacks is ongoing with another round of GPIO drivers updated. You
  will also see these commits coming in from other subsystems as with
  the relevant changes merged into mainline last cycle, I've started
  converting GPIO providers located elsewhere than drivers/gpio/.

  GPIO core:
   - use more lock guards where applicable
   - refactor GPIO ACPI code and shrink it in the process by 8%
   - move GPIO ACPI quirks into a separate file
   - remove unneeded #ifdef
   - convert GPIO devres helpers to using devm_add_action() where
     applicable which shrinks and simplifies the code
   - refactor GPIO descriptor validation in GPIO consumer interfaces
   - don't allow setting values on input lines in the GPIO core which
     will take off the burden from GPIO drivers of checking this down
     the line
   - provide gpiod_is_equal() as a way of safely comparing two GPIO
     descriptors (the only current user is in regulator core)

  New drivers:
   - add the GPIO module for the max77759 multifunction device
   - add the GPIO driver for the VeriSilicon BLZP1600 GPIO controller
   - add the GPIO driver for the Spacemit K1 SoC

  Driver improvements:
   - convert more drivers to using the new GPIO line value setter
     callbacks
   - convert more drivers to making the irq_chip immutable as is
     recommended by the interrupt subsystem
   - extend build testing coverage by enabling more modules to be built
     with COMPILE_TEST=y
   - extend the gpio-aggregator module with a configfs interface that
     makes the setup easier for user-space than the existing
     driver-level sysfs attributes and also adds more advanced
     configuration features (such as referring to aggregated lines by
     their original names or modifying their names as exposed by the
     aggregated chip)
   - add a missing mutex_destroy() in gpio-imx-scu
   - add an OF polarity quirk for s5m8767
   - allow building gpio-vf610 as a loadable module
   - make gpio-mxc not hardcode its GPIO base number with GPIO SYSFS
     interface disabled (another small step towards getting rid of the
     global GPIO numberspace)
   - add support for level-triggered interrupts to gpio-pca953x
   - don't double-check the ngpios property in gpio-ds4520 as GPIO core
     already does it
   - don't double-check the number of GPIOs in gpio-imx-scu as GPIO core
     already does it
   - remove unused callbacks from gpio-max3191x

  DT bindings:
   - add device-tree bindings for max77759, spacemit,k1 and blzp1600
     (new drivers added this cycle)
   - document more properties for gpio-vf610 and gpio-tegra186
   - document a new pca95xx variant
   - fix style of examples in several GPIO DT-binding documents

  Misc:
   - TODO list updates"

* tag 'gpio-updates-for-v6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux: (123 commits)
  gpio: timberdale: select GPIOLIB_IRQCHIP
  gpio: lpc18xx: select GPIOLIB_IRQCHIP
  gpio: grgpio: select GPIOLIB_IRQCHIP
  gpio: bcm-kona: select GPIOLIB_IRQCHIP
  dt-bindings: gpio: vf610: add ngpios and gpio-reserved-ranges
  gpio: davinci: select GPIOLIB_IRQCHIP
  gpiolib-acpi: Update file references in the Documentation and MAINTAINERS
  gpiolib: acpi: Move quirks to a separate file
  gpiolib: acpi: Add acpi_gpio_need_run_edge_events_on_boot() getter
  gpiolib: acpi: Handle deferred list via new API
  gpiolib: acpi: Make sure we fill struct acpi_gpio_info
  gpiolib: acpi: Switch to use enum in acpi_gpio_in_ignore_list()
  gpiolib: acpi: Use temporary variable for struct acpi_gpio_info
  gpiolib: remove unneeded #ifdef
  gpio: mpc8xxx: select GPIOLIB_IRQCHIP
  gpio: pxa: select GPIOLIB_IRQCHIP
  gpio: pxa: Make irq_chip immutable
  gpio: timberdale: Make irq_chip immutable
  gpio: xgene-sb: Make irq_chip immutable
  gpio: davinci: Make irq_chip immutable
  ...

gpio: TODO: add item about GPIO drivers reading struct gpio_chip::base

2025-05-15T15:00:22+00:00

drivers/pinctrl/pinctrl-at91.c uses struct gpio_chip::base to find out
which bit to set in a register:

  dev_dbg(npct->dev, "enable pin %u as GPIO\n", offset);

  mask = 1 << (offset - chip->base);

This adds a non-obvious dependency on the global numberspace from the
GPIO driver itself, even if all consumers use the descriptor API.

More such instances may exist and will need to be fixed in the quest for
removal of the global numberspace, so add a reminder about it to the
TODO list.

Link: https://lore.kernel.org/all/1d00c056-3d61-4c22-bedd-3bae0bf1ddc4@pengutronix.de/
Suggested-by: Bartosz Golaszewski 
Signed-off-by: Ahmad Fatoum 
Link: https://lore.kernel.org/r/20250507-gpio-chip-base-readback-v1-1-ade56e38480b@pengutronix.de
Signed-off-by: Bartosz Golaszewski

gpio: TODO: track the removal of regulator-related workarounds

2025-04-08T08:41:59+00:00

The GPIOD_FLAGS_BIT_NONEXCLUSIVE flag and devm_gpiod_unhinge() function
should be replaced with a better solution. The pwrseq subsystem is a good
candidate. GPIOs themselves should remain a unique resource. Add a task
for tracking the removal of these deprecated symbols.

Acked-by: Linus Walleij 
Link: https://lore.kernel.org/r/20250401-gpio-todo-remove-nonexclusive-v2-4-7c1380797b0d@linaro.org
Signed-off-by: Bartosz Golaszewski

gpio: TODO: add an item to track reworking the sysfs interface

2025-03-24T09:35:10+00:00

It seems there really exists the need for a simple sysfs interface that
can be easily used from minimal initramfs images that don't contain much
more than busybox. However the current interface poses a challenge to
the removal of global GPIO numberspace. Add an item that tracks
extending the existing ABI with a per-chip export/unexport attribute
pair.

Reviewed-by: Linus Walleij 
Link: https://lore.kernel.org/r/20250321-gpio-todo-updates-v1-6-7b38f07110ee@linaro.org
Signed-off-by: Bartosz Golaszewski