Merge tag 'gpio-updates-for-v6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux

Pull gpio updates from Bartosz Golaszewski:
"There's one new driver, lots of various updates to ex

Merge tag 'gpio-updates-for-v6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux

Pull gpio updates from Bartosz Golaszewski:
"There's one new driver, lots of various updates to existing ones, some
refactoring support for new models and misc tweaks and fixes.

The biggest new feature in GPIO core is adding support for managed,
enable-counted sharing of GPIO pins, something that - until now - was
only hacked around with the GPIOD_FLAGS_BIT_NONEXCLUSIVE request flag
which basically allowed drivers to "fight it out" for the descriptor
and provided no synchronization. It was enabled on Qualcomm platforms
(and thus is enabled on arm64 defconfig) and I plan on removing
GPIOD_FLAGS_BIT_NONEXCLUSIVE once all drivers using it are switched to
the new mechanism.

GPIO core:
- add proper support for shared GPIOs that's aiming to replace the
current sharing mechanism (which provides no synchronization ot
enable counting) and enable it for Qualcomm platforms
- improve the software node GPIO lookup by using the fwnode
representation instead of the software node's name which was prone
to bugs (GPIO controllers don't have to use the software node's
name as their kernel label)
- remove the last user of legacy-of-mm-gpiochip.h and drop the header
- move closer to removing the legacy gpio_request_one() routine
- rename some symbols for consistency
- shrink GPIO printk() helpers by reusing existing code
- remove some redundant kernel messages
- use min() instead of min_t() in GPIO ACPI code
- use system_percpu_wq instead of system_wq in GPIO character device
code

New drivers:
- add a driver for the QIXIS FPGA GPIO controller

Driver improvements:
- use modernized variants of power management macros across a wide
array of drivers in order to avoid having to use the __maybe_unused
attribute
- convert gpio-elkhartlake and reset-gpio to using the auxiliary bus
instead of the platform bus as they are not really described in
firmware
- use lock guards and update symbol prefixes in gpio-mmio
- support the bryx radio interface kit in gpio-mpsse + refactor the
driver
- use software nodes for configuring the reset-gpio driver, including
setting up the reference to the shared "reset" pin
- check and propagate the return value of gpiod_set_value() to
user-space in gpio-virtuser (this was previously not possible as
this function returned void)
- extend the gpio-regmap helper with more features (bypass cache for
aliased inputs, force writes for aliased data registers, add a new
configuration parameter)
- remove unneeded includes from gpio-aspeed and gpio-latch
- add support for Tegra410 to gpio-tegra186
- replace PCI-specific PM with generic device-level PM in gpio-bt8xx
- use dynamic GPIO range allocation in gpio-loongson-64bit
- improve handling of level-triggered interrupts in gpio-pca953x
- add suspend/resume support to gpio-fxl6408
- add support for more models to gpio-menz127
- optimize gpio-mvebu interrupt handling by avoiding unnecessary
calls to mvebu_gpio_irq_handler()
- make locking more consistent in gpio-grgpio

Device-tree bindings:
- document new NXP and Microchip models

Documentation:
- add a comprehensive compatibility and feature list for
gpio-pca953x, which is a great addition as it's probably the most
commonly used GPIO expander driver
- kernel-doc tweaks

Late fixes:
- use BYTE_CTRL_MODE for 2K2000/3000 models in gpio-loongson"

* tag 'gpio-updates-for-v6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux: (80 commits)
gpio: loongson: Switch 2K2000/3000 GPIO to BYTE_CTRL_MODE
gpio: regmap: fix kernel-doc notation
gpio: shared: fix a deadlock
gpio: shared-proxy: set suppress_bind_attrs
gpio: shared: ignore GPIO hogs when traversing the device tree
gpio: shared: ignore special __symbols__ node when traversing device tree
gpio: shared: handle the reset-gpios corner case
gpio: zynq: Use modern PM macros
gpio: xilinx: Use modern PM macros
gpio: xgene: Use modern PM macros
gpio: uniphier: Use modern PM macros
gpio: tqmx86: Use modern PM macros
gpio: pch: Use modern PM macros
gpio: omap: Use modern PM macros
gpio: msc313: Use modern PM macros
gpio: mlxbf2: Use modern PM macros
gpio: ml-ioh: Use modern PM macros
gpio: pl061: Use modern PM macros
gpio: htc-egpio: Use modern PM macros
gpio: brcmstb: Use modern PM macros
...

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gpio: qixis-fpga: Fix a NULL vs IS_ERR() bug in probe()

The devm_platform_ioremap_resource() function doesn't return NULL, it
returns error pointers. Fix the checking to match.

Fixes: e88500247dc3

gpio: qixis-fpga: Fix a NULL vs IS_ERR() bug in probe()

The devm_platform_ioremap_resource() function doesn't return NULL, it
returns error pointers. Fix the checking to match.

Fixes: e88500247dc3 ("gpio: add QIXIS FPGA GPIO controller")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Michael Walle <mwalle@kernel.org>
Link: https://lore.kernel.org/r/aPsaaf0h343Ba7c1@stanley.mountain
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

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gpio: qixis-fpga: add missing module description

A kernel module must have a license and should have a description. Add
missing MODULE_LICENSE(), MODULE_DESCRIPTION() and throw in a
MODULE_AUTHOR()

gpio: qixis-fpga: add missing module description

A kernel module must have a license and should have a description. Add
missing MODULE_LICENSE(), MODULE_DESCRIPTION() and throw in a
MODULE_AUTHOR() for good measure.

This fixes the following build issues:

ERROR: modpost: missing MODULE_LICENSE() in drivers/gpio/gpio-qixis-fpga.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/gpio/gpio-qixis-fpga.o

Reported-by: Mark Brown <broonie@kernel.org>
Closes: https://lore.kernel.org/all/aPJW8HIke5pj3doX@sirena.org.uk/
Fixes: e88500247dc3 ("gpio: add QIXIS FPGA GPIO controller")
Link: https://lore.kernel.org/r/20251020072028.21423-1-brgl@bgdev.pl
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

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gpio: add QIXIS FPGA GPIO controller

Add support for the GPIO controller found on some QIXIS FPGAs in
Layerscape boards such as LX2160ARDB and LS1046AQDS. This driver is
using gpio-regmap.

A GPIO c

gpio: add QIXIS FPGA GPIO controller

Add support for the GPIO controller found on some QIXIS FPGAs in
Layerscape boards such as LX2160ARDB and LS1046AQDS. This driver is
using gpio-regmap.

A GPIO controller has a maximum of 8 lines (all found in the same
register). Even within the same controller, the GPIO lines' direction is
fixed, which mean that both input and output lines are found in the same
register. This is why the driver also passed to gpio-regmap the newly
added .fixed_direction_output bitmap to represent the true direction of
the lines.

Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Michael Walle <mwalle@kernel.org> # for the gpio-regmap part
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

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