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1,426,955 commits

Author SHA1 Message Date
Rosen Penev
a6e53d05ab gpio: cs5535: use dynamically allocated priv struct
Static allocation is deprecated.

Remove the FIXME as gpiochip_add_data allows using gpiod_get_data.
No need for container_of.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
Link: https://patch.msgid.link/20260313001209.117823-1-rosenp@gmail.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-03-16 10:11:02 +01:00
Tzung-Bi Shih
3518fd4c78 Revert "gpio: Access gpio_bus_type in gpiochip_setup_dev()"
This reverts commit cc11f4ef66.

Commit cc11f4ef66 ("gpio: Access `gpio_bus_type` in
gpiochip_setup_dev()") moved the bus type assignment from
gpiochip_add_data_with_key() to gpiochip_setup_dev().

This change introduced a bug where dev_printk() and friends might access
the bus name after gpiochip_add_data_with_key() but before
gpiochip_setup_dev() has run.  In this window, the bus type is not yet
initialized, leading to empty bus names in logs.

Move the bus type assignment back to gpiochip_add_data_with_key() to
ensure the bus name is available before any potential users like
dev_printk().

Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Closes: https://lore.kernel.org/all/CAMuHMdU0Xb=Moca5LUex+VxyHQa2-uYJgYf4hzHiSEjDCQQT=Q@mail.gmail.com/
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
Link: https://patch.msgid.link/20260313054112.1248074-1-tzungbi@kernel.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-03-16 10:10:02 +01:00
Linus Walleij
7673e4c7f7 Do not enable the v1 uAPI by default
It's been five years since we introduced the v2 uAPI and
the major consumer libgpiod is at v2.2.3.

Let's discourage the old ABI.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Kent Gibson <warthog618@gmail.com>
Link: https://patch.msgid.link/20260314-no-y-uapi1-default-v2-1-578f09c91b8f@kernel.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-03-16 10:08:09 +01:00
Alban Bedel
a25f48fd92 gpio: kempld: Implement the interrupt controller
Add a GPIO IRQ chip implementation for the kempld GPIO controller. Of
note is only how the parent IRQ is obtained.

The IRQ for the GPIO controller can be configured in the BIOS, along
with the IRQ for the I2C controller. These IRQ are returned by ACPI
but this information is only usable if both IRQ are configured. When
only one is configured, only one is returned making it impossible to
know which one it is.

Luckily the BIOS will set the configured IRQ in the PLD registers, so
it can be read from there instead, and that also work on platforms
without ACPI.

The vendor driver allowed to override the IRQ using a module
parameters, so there are boards in field which used this parameter
instead of properly configuring the BIOS. This implementation provides
this as well for compatibility.

Signed-off-by: Alban Bedel <alban.bedel@lht.dlh.de>
Link: https://patch.msgid.link/20260311143120.2179347-5-alban.bedel@lht.dlh.de
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-03-16 10:05:33 +01:00
Alban Bedel
2443c2e122 gpio: kempld: Add support for get/set multiple
As the bus accesses are quiet slow with this device, supporting the
get/set multiple API can help with performences. The implementation
tries to keep the number of bus access to a minimum by checking
the mask to only read or write the needed bytes.

Signed-off-by: Alban Bedel <alban.bedel@lht.dlh.de>
Link: https://patch.msgid.link/20260311143120.2179347-4-alban.bedel@lht.dlh.de
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-03-16 10:05:33 +01:00
Alban Bedel
84cb463d2f gpio: kempld: Add support for PLD version >= 2.8
Starting with version 2.8 there is a dedicated register to configure
the output level. Read the PLD version in the probe and select the
correct register to use for the set operations.

Signed-off-by: Alban Bedel <alban.bedel@lht.dlh.de>
Link: https://patch.msgid.link/20260311143120.2179347-3-alban.bedel@lht.dlh.de
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-03-16 10:05:32 +01:00
Alban Bedel
4071437cd2 gpio: kempld: Simplify the bit level register accesses
The hardware uses 8 bit registers but supports configurations with up
to 16 GPIO, so all GPIO registers come in pairs. Most accesses to
single bits is done using the kempld_gpio_bitop() and
kempld_gpio_get_bit() functions, which take a register index and bit
offset as parameter. These functions apply a modulo on the bit offset
but leave the register index as is, so callers have to use an
additional macro to fix the register index before the call.

Simplify things by also handling the register index offsetting in the
bitop functions.

Signed-off-by: Alban Bedel <alban.bedel@lht.dlh.de>
Link: https://patch.msgid.link/20260311143120.2179347-2-alban.bedel@lht.dlh.de
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-03-16 10:05:32 +01:00
Linus Walleij
803e822b00 gpiolib: Update gpiochip_find_base_unlocked() kerneldoc
This function albeit static was lacking a kerneldoc, and the
function returns a dangerous number for internal use so make
that clear in the kerneldoc.

Reported-by: Matthijs Kooijman <matthijs@stdin.nl>
Signed-off-by: Linus Walleij <linusw@kernel.org>
Link: https://patch.msgid.link/20260311-gpio-discourage-dynamic-v1-1-c8b68fc84203@kernel.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-03-16 09:53:25 +01:00
Richard Lyu
8a3613898f gpio: max732x: use guard(mutex) to simplify locking
Convert the max732x driver to use the RAII-based guard(mutex) macro from
<linux/cleanup.h>. This change replaces manual mutex_lock() and
mutex_unlock() calls, allowing the chip lock to be managed automatically
based on function scope.

Refactor max732x_gpio_set_mask() and max732x_irq_update_mask() to
improve code readability. This allows for direct returns and removes
the redundant 'out' label in the set_mask function, resulting in
cleaner and more maintainable code.

While at it: order includes alphabetically and add missing ones.

Signed-off-by: Richard Lyu <richard.lyu@suse.com>
Link: https://patch.msgid.link/20260311085924.191288-1-richard.lyu@suse.com
[Bartosz: tweak commit message, add err.h and device.h to includes]
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-03-16 09:52:51 +01:00
Bartosz Golaszewski
696e9ba9a3 gpio: sim: allow to define the active-low setting of a simulated hog
Add a new configfs attribute to the hog group allowing to configure the
active-low lookup flag for hogged lines. This will allow us to extend
tests to also cover the line config of hogs set up using software nodes.

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-v2-6-4e61f3dbf06a@oss.qualcomm.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-03-16 09:51:07 +01:00
Bartosz Golaszewski
dea046e7f4 gpio: remove machine hogs
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>
2026-03-16 09:51:06 +01:00
Bartosz Golaszewski
e627fc9fad ARM: omap1: ams-delta: convert GPIO hogs to using firmware nodes
Setup a software node hierarchy for the latch2 GPIO controller defining
the required hog and stop using legacy machine hog API.

Acked-by: Kevin Hilman <khilman@baylibre.com>
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-v2-4-4e61f3dbf06a@oss.qualcomm.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-03-16 09:51:06 +01:00
Bartosz Golaszewski
5cfbd0eb78 gpio: sim: use fwnode-based GPIO hogs
Convert gpio-sim to using software nodes for setting up simulated hogs
instead of legacy machine hogs.

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-v2-3-4e61f3dbf06a@oss.qualcomm.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-03-16 09:51:06 +01:00
Bartosz Golaszewski
d1d564ec49 gpio: move hogs into GPIO core
Refactor line hogging code by moving the parts duplicated in
gpiolib-acpi-core.c and gpiolib-of.c into gpiolib.c, leaving just the
OF-specific bits in the latter.

This makes fwnode the primary API for setting up hogs and allows to use
software nodes in addition to ACPI and OF nodes.

Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
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-v2-2-4e61f3dbf06a@oss.qualcomm.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-03-16 09:51:05 +01:00
Bartosz Golaszewski
bbee90e750 gpio: of: clear OF_POPULATED on hog nodes in remove path
The previously set OF_POPULATED flag should be cleared on the hog nodes
when removing the chip.

Cc: stable@vger.kernel.org
Fixes: 63636d956c ("gpio: of: Add DT overlay support for GPIO hogs")
Acked-by: Linus Walleij <linusw@kernel.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/20260309-gpio-hog-fwnode-v2-1-4e61f3dbf06a@oss.qualcomm.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-03-16 09:51:05 +01:00
Bartosz Golaszewski
bf017304fc regulator: drop unneeded dependencies on OF_GPIO
OF_GPIO is selected automatically on all OF systems. Any symbols it
controls also provide stubs so there's really no reason to select it
explicitly.

Acked-by: Mark Brown <broonie@kernel.org>
Link: https://patch.msgid.link/20260304-gpio-of-kconfig-v1-5-d597916e79e7@oss.qualcomm.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-03-13 14:42:53 +01:00
Bartosz Golaszewski
dd1cdfb20e powerpc: drop unneeded dependency on OF_GPIO
OF_GPIO is automatically enabled on all OF systems. There's no need to
select it explicitly.

Reviewed-by: Christophe Leroy (CS GROUP) <chleroy@kernel.org>
Link: https://patch.msgid.link/20260304-gpio-of-kconfig-v1-3-d597916e79e7@oss.qualcomm.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-03-13 14:42:53 +01:00
Bartosz Golaszewski
d2cd20f7c2 arc: axs10x: drop unneeded dependency on OF_GPIO
OF_GPIO is automatically enabled on all OF systems. There's no need to
select it explicitly.

Acked-by: Vineet Gupta <vgupta@kernel.org>
Link: https://patch.msgid.link/20260304-gpio-of-kconfig-v1-2-d597916e79e7@oss.qualcomm.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-03-13 14:42:52 +01:00
Rosen Penev
b4784adfe3 gpio: tegra186: allocate irqs with the main struct
Remove an extra kcalloc call by using a flexible array member.

Add __counted_by for extra runtime analysis.

Assign counting variable immediately after allocation as required by
__counted_by.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
Link: https://patch.msgid.link/20260309232804.331882-1-rosenp@gmail.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-03-11 09:45:48 +01:00
Rosen Penev
223d9a310c gpio: htc-egpio: allocate irq with the main struct
Use a flexible array member to combinwe allocations.

Add __counted_by for extra runtime analysis.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
Link: https://patch.msgid.link/20260309225204.44789-1-rosenp@gmail.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-03-11 09:45:22 +01:00
Rosen Penev
0258fe8721 gpio: bcm-kona: reduce the number of memory allocations
Simplify allocation by using a flexible array member.

Use __counted_by for extra runtime analysis.

Shuffle some code as __counted_by requires the counting variable to be
set right after allocation.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
Link: https://patch.msgid.link/20260311003431.31881-1-rosenp@gmail.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-03-11 09:43:23 +01:00
Rustam Adilov
8f0aecf295 gpio: realtek-otto: add rtl9607 support
The RTL9607C SoC has support for 3 GPIO banks with 32 GPIOs each and
the port order is reversed just like in RTL930x.

Signed-off-by: Rustam Adilov <adilov@disroot.org>
Reviewed-by: Sander Vanheule <sander@svanheule.net>
Link: https://patch.msgid.link/20260305161106.15999-3-adilov@disroot.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-03-10 10:10:24 +01:00
Rustam Adilov
49944d6ab7 dt-bindings: gpio: realtek-otto: add rtl9607 compatible
Add the "realtek,rtl9607-gpio" compatible for GPIO nodes
on the RTL9607C SoC series.

Signed-off-by: Rustam Adilov <adilov@disroot.org>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Reviewed-by: Sander Vanheule <sander@svanheule.net>
Link: https://patch.msgid.link/20260305161106.15999-2-adilov@disroot.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-03-10 10:10:24 +01:00
Bartosz Golaszewski
e0c8104074 Immutable branch between GPIO and net
Convert remaining users of of_gpio.h to using GPIO descriptors and
 remove the header.
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Merge tag 'ib-gpio-remove-of-gpio-h-for-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux.git into gpio/for-next

Immutable branch between GPIO and net

Convert remaining users of of_gpio.h to using GPIO descriptors and
remove the header.
2026-03-09 10:32:41 +01:00
Jialu Xu
b6420bd5aa gpio: remove of_get_named_gpio() and <linux/of_gpio.h>
All in-tree consumers have been converted to the descriptor-based API.
Remove the deprecated of_get_named_gpio() helper, delete the
<linux/of_gpio.h> header, and drop the corresponding entry from
MAINTAINERS.

Also remove the completed TODO item for this cleanup.

Signed-off-by: Jialu Xu <xujialu@vimux.org>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Link: https://patch.msgid.link/02ABDA1F9E3FAF1F+20260307030623.3495092-6-xujialu@vimux.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-03-09 10:25:34 +01:00
Jialu Xu
253350dbf3 nfc: nfcmrvl: convert to gpio descriptors
Replace the legacy of_get_named_gpio() / gpio_request_one() /
gpio_set_value() API with the descriptor-based devm_gpiod_get_optional() /
gpiod_set_value() API from <linux/gpio/consumer.h>, removing the
dependency on <linux/of_gpio.h>.

The "reset-n-io" property rename quirk already exists in gpiolib-of.c
(added in commit 9c2cc7171e), so no additional quirk is needed.

Signed-off-by: Jialu Xu <xujialu@vimux.org>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Link: https://patch.msgid.link/DD684946FD7EE161+20260307030623.3495092-4-xujialu@vimux.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-03-09 10:25:34 +01:00
Jialu Xu
b544927d75 nfc: s3fwrn5: convert to gpio descriptors
Replace the legacy of_get_named_gpio() / gpio_request_one() /
gpio_set_value() API with the descriptor-based devm_gpiod_get() /
gpiod_set_value() API from <linux/gpio/consumer.h>, removing the
dependency on <linux/of_gpio.h>.

This removes the s3fwrn5_i2c_parse_dt() and s3fwrn82_uart_parse_dt()
functions since devm_gpiod_get() handles both DT lookup and resource
management. The gpio_en and gpio_fw_wake fields in struct phy_common
are changed from int to struct gpio_desc *.

Add rename quirks in gpiolib-of.c for the deprecated "s3fwrn5,en-gpios"
and "s3fwrn5,fw-gpios" properties to maintain backward compatibility
with old device trees.

Signed-off-by: Jialu Xu <xujialu@vimux.org>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Link: https://patch.msgid.link/94FF47746A92BD6B+20260307030623.3495092-2-xujialu@vimux.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-03-09 10:25:34 +01:00
Krzysztof Kozlowski
c452588f3c dt-bindings: gpio: gpio-delay: Use Alexander's email
Group/anonymous mailboxes are not accepted for bindings maintainers, so
switch from such linux @TQ mailbox to Alexander's email.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Reviewed-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Link: https://patch.msgid.link/20260212110905.52842-2-krzysztof.kozlowski@oss.qualcomm.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-03-09 10:17:04 +01:00
Linus Walleij
5645f80592 gpio: Document line value semantics
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>
2026-03-09 10:16:00 +01:00
Johan Hovold
3671411e90 gpio: mpsse: drop redundant device reference
Driver core holds a reference to the USB interface and its parent USB
device while the interface is bound to a driver and there is no need to
take additional references unless the structures are needed after
disconnect.

Drop the redundant device reference to reduce cargo culting, make it
easier to spot drivers where an extra reference is needed, and reduce
the risk of memory leaks when drivers fail to release it.

Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Link: https://patch.msgid.link/20260305124945.10781-1-johan@kernel.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-03-09 10:15:00 +01:00
Conor Dooley
b678676b7a dt-bindings: gpio: mpfs-gpio: permit resets
Both CoreGPIO and the hardened versions of it on mpfs and pic64gx have a
reset pin. For the former, usually this is wired to a common fabric
reset not managed by software and for the latter two the platform
firmware takes them out of reset on first-party boards (or those using
modified versions of the vendor firmware), but not all boards may take
this approach. Permit providing a reset in devicetree for Linux, or
other devicetree-consuming software, to use.

Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://patch.msgid.link/20260303-irate-hungry-b54cda817e42@spud
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-03-04 09:18:29 +01:00
Tzung-Bi Shih
fdfe3e72a2 gpio: Fix lockdep warnings in gpiolib_{cdev,sysfs}_register()
A lockdep warning is reported in gpiolib-cdev driver:

  WARNING: drivers/gpio/gpiolib-cdev.c:2735 at
  gpiolib_cdev_register+0x114/0x140, CPU#1: swapper/0/1
  Modules linked in:
  CPU: 1 UID: 0 PID: 1 Comm: swapper/0 Not tainted
  7.0.0-rc1-next-20260227-00065-g6af4b9cfeded #12259 PREEMPT
  Hardware name: Samsung Exynos (Flattened Device Tree)
  Call trace:
    unwind_backtrace from show_stack+0x10/0x14
    show_stack from dump_stack_lvl+0x68/0x88
    dump_stack_lvl from __warn+0x94/0x210
    __warn from warn_slowpath_fmt+0x1b0/0x1bc
    warn_slowpath_fmt from gpiolib_cdev_register+0x114/0x140
    gpiolib_cdev_register from gpiochip_setup_dev+0x4c/0xd0
    gpiochip_setup_dev from gpiochip_add_data_with_key+0x960/0xad4
    gpiochip_add_data_with_key from devm_gpiochip_add_data_with_key+0x20/0x5c

This is because the SRCU wasn't held in gpiolib_cdev_register() when the
caller is from gpiochip_add_data_with_key() instead of
gpiochip_setup_devs().  gpiochip_sysfs_register() shares the similar
concern.

Given that both gpiolib_cdev_register() and gpiochip_sysfs_register()
are only called from gpiolib but no external users.  Remove the lockdep
checks to fix the warnings.

Reported-by: Marek Szyprowski <m.szyprowski@samsung.com>
Closes: https://lore.kernel.org/all/506ce9b3-d492-4fce-9d02-330e411911e2@samsung.com/
Fixes: cf674f1a0c ("gpio: Ensure struct gpio_chip for gpiochip_setup_dev()")
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://patch.msgid.link/20260228131430.102388-1-tzungbi@kernel.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-03-02 10:11:15 +01:00
Tzung-Bi Shih
c7f92042d3 selftests: gpio: Add gpio-cdev-uaf tests
Add tests for gpiolib-cdev to make sure accessing to dangling resources
via the opening file descriptor won't crash the system after the
underlying resource providers have gone.

Reviewed-by: Linus Walleij <linusw@kernel.org>
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
Link: https://patch.msgid.link/20260223061726.82161-7-tzungbi@kernel.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-02-27 10:05:22 +01:00
Tzung-Bi Shih
ee68f18d1f gpio: cdev: Don't check struct gpio_chip in gpio_chrdev_open()
It's harmless even if: chrdev_open() and cdev_device_del() run at the
same time, and gpio_chrdev_open() gets called after the underlying GPIO
chip has gone.  The subsequent file operations check the availability
of struct gpio_chip anyway.

Don't check struct gpio_chip in gpio_chrdev_open().

Reviewed-by: Linus Walleij <linusw@kernel.org>
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
Link: https://patch.msgid.link/20260223061726.82161-6-tzungbi@kernel.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-02-27 10:05:21 +01:00
Tzung-Bi Shih
cf674f1a0c gpio: Ensure struct gpio_chip for gpiochip_setup_dev()
Ensure struct gpio_chip for gpiochip_setup_dev().  This eliminates a few
checks for struct gpio_chip.

Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
Link: https://patch.msgid.link/20260223061726.82161-5-tzungbi@kernel.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-02-27 10:05:21 +01:00
Tzung-Bi Shih
395b8e555d gpio: sysfs: Remove redundant check for struct gpio_chip
gpiochip_sysfs_unregister() is only called by gpiochip_remove() where
the struct gpio_chip is ensured.

Remove the redundant check.

Reviewed-by: Linus Walleij <linusw@kernel.org>
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
Link: https://patch.msgid.link/20260223061726.82161-4-tzungbi@kernel.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-02-27 10:05:21 +01:00
Tzung-Bi Shih
049f711317 gpio: Remove redundant check for struct gpio_chip
gpiolib_dbg_show() is only called by gpiolib_seq_show() which has
ensured the struct gpio_chip.  Remove the redundant check in
gpiolib_dbg_show().

Reviewed-by: Linus Walleij <linusw@kernel.org>
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
Link: https://patch.msgid.link/20260223061726.82161-3-tzungbi@kernel.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-02-27 10:05:20 +01:00
Tzung-Bi Shih
cc11f4ef66 gpio: Access gpio_bus_type in gpiochip_setup_dev()
To make the intent clear, access `gpio_bus_type` only when it's ready in
gpiochip_setup_dev().

Reviewed-by: Linus Walleij <linusw@kernel.org>
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
Link: https://patch.msgid.link/20260223061726.82161-2-tzungbi@kernel.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-02-27 10:05:20 +01:00
Bartosz Golaszewski
b08b3f16bb Merge branch 'gpio/dev-init-rework' into gpio/for-next
Pull in a major rework of gpiochip_add_data_with_key()
2026-02-27 10:04:49 +01:00
Tzung-Bi Shih
16fdabe143 gpio: Fix resource leaks on errors in gpiochip_add_data_with_key()
Since commit aab5c6f200 ("gpio: set device type for GPIO chips"),
`gdev->dev.release` is unset.  As a result, the reference count to
`gdev->dev` isn't dropped on the error handling paths.

Drop the reference on errors.

Also reorder the instructions to make the error handling simpler.
Now gpiochip_add_data_with_key() roughly looks like:

   >>> Some memory allocation.  Go to ERR ZONE 1 on errors.
   >>> device_initialize().

   gpiodev_release() takes over the responsibility for freeing the
   resources of `gdev->dev`.  The subsequent error handling paths
   shouldn't go through ERR ZONE 1 again which leads to double free.

   >>> Some initialization mainly on `gdev`.
   >>> The rest of initialization.  Go to ERR ZONE 2 on errors.
   >>> Chip registration success and exit.

   >>> ERR ZONE 2.  gpio_device_put() and exit.
   >>> ERR ZONE 1.

Cc: stable@vger.kernel.org
Fixes: aab5c6f200 ("gpio: set device type for GPIO chips")
Reviewed-by: Linus Walleij <linusw@kernel.org>
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
Link: https://patch.msgid.link/20260205092840.2574840-1-tzungbi@kernel.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-02-27 10:01:51 +01:00
Bartosz Golaszewski
eb58f2b9bb gpiolib: match secondary fwnode too in gpio_device_find_by_fwnode()
In GPIOLIB, during fwnode lookup, after having resolved the consumer's
reference to a specific fwnode, we only match it against the primary
node of the controllers. Let's extend that to also the secondary node by
reworking gpio_chip_match_by_fwnode()

Suggested-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: Danilo Krummrich <dakr@kernel.org>
Reviewed-by: Rafael J. Wysocki (Intel) <rafael@kernel.org>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Link: https://patch.msgid.link/20260226-device-match-secondary-fwnode-v4-1-27bd0cfbd8c6@oss.qualcomm.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-02-27 09:53:06 +01:00
Bartosz Golaszewski
fa4a3a9513 gpio: introduce a header for symbols shared by suppliers and consumers
GPIO_LINE_DIRECTION_IN/OUT definitions are used both in supplier (GPIO
controller drivers) as well as consumer code. In order to not force the
consumers to include gpio/driver.h or - even worse - to redefine these
values, create a new header file - gpio/defs.h - and move them over
there. Include this header from both gpio/consumer.h and gpio/driver.h.

Reviewed-by: Linus Walleij <linusw@kernel.org>
Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/20260223172006.204268-1-bartosz.golaszewski@oss.qualcomm.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-02-27 09:49:43 +01:00
Andy Shevchenko
b2d51bc160 gpio: generic: Don't use 'proxy' headers
Update header inclusions to follow IWYU (Include What You Use)
principle.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Link: https://patch.msgid.link/20260226092023.4096921-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-02-27 09:49:02 +01:00
Thorsten Blum
e8fc8588d0 gpiolib: replace snprintf("%s") with strscpy
Replace snprintf("%s", ...) with strscpy() for direct string copying.

Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Link: https://patch.msgid.link/20260222170327.281576-2-thorsten.blum@linux.dev
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-02-23 10:42:55 +01:00
Andy Shevchenko
0acbe817c3 gpio: ts4800: Remove duplicate code to handle 'ngpios' property
The gpio_generic_chip_init() handles the 'ngpios' property and
assigns the respective field in struct gpio_chip either with
the value of it, or, if not found, with the default based on
the register size. There is no need to repeat this in the driver.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Link: https://patch.msgid.link/20260219134647.2258593-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-02-23 10:42:14 +01:00
Dmitry Torokhov
c08381ad56 gpio: viperboard: normalize return value of gpio_get
The GPIO get callback is expected to return 0 or 1 (or a negative error
code). Ensure that the value returned by vprbrd_gpiob_get() in the output
case is normalized to the [0, 1] range.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Link: https://patch.msgid.link/20260218190657.2974723-7-dmitry.torokhov@gmail.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-02-23 10:41:43 +01:00
Dmitry Torokhov
9eb7ecfd20 gpio: tps65086: normalize return value of gpio_get
The GPIO get callback is expected to return 0 or 1 (or a negative error
code). Ensure that the value returned by tps65086_gpio_get() is normalized
to the [0, 1] range.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Link: https://patch.msgid.link/20260218190657.2974723-6-dmitry.torokhov@gmail.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-02-23 10:41:43 +01:00
Dmitry Torokhov
e62b94a690 gpio: stp-xway: normalize return value of gpio_get
The GPIO get callback is expected to return 0 or 1 (or a negative error
code). Ensure that the value returned by xway_stp_get() is normalized
to the [0, 1] range.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Link: https://patch.msgid.link/20260218190657.2974723-5-dmitry.torokhov@gmail.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-02-23 10:41:43 +01:00
Dmitry Torokhov
5a32ebabb6 gpio: lp873x: normalize return value of gpio_get
The GPIO get callback is expected to return 0 or 1 (or a negative error
code). Ensure that the value returned by lp873x_gpio_get() is normalized
to the [0, 1] range.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Link: https://patch.msgid.link/20260218190657.2974723-4-dmitry.torokhov@gmail.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-02-23 10:41:42 +01:00
Dmitry Torokhov
4d720b0d68 gpio: da9055: normalize return value of gpio_get
The GPIO get callback is expected to return 0 or 1 (or a negative error
code). Ensure that the value returned by da9055_gpio_get() is normalized
to the [0, 1] range.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Link: https://patch.msgid.link/20260218190657.2974723-3-dmitry.torokhov@gmail.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
2026-02-23 10:41:42 +01:00