linux.git/include/linux/gpio/regmap.h, branch v7.2-rc1

gpio: regmap: Support sparsed fixed direction

2026-05-12T09:54:17+00:00

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 
Signed-off-by: Linus Walleij 
Reviewed-by: Michael Walle 
Reviewed-by: Alex Elder 
Link: https://patch.msgid.link/20260511-regmap-gpio-sparse-fixed-dir-v3-1-1429ec453be7@kernel.org
Signed-off-by: Bartosz Golaszewski

gpio: regmap: fix kernel-doc notation

2025-11-28T11:58:05+00:00

Add a ':' to the end of struct member names to prevent kernel-doc
warnings:

Warning: include/linux/gpio/regmap.h:108 struct member 'regmap_irq_line'
 not described in 'gpio_regmap_config'
Warning: include/linux/gpio/regmap.h:108 struct member 'regmap_irq_flags'
 not described in 'gpio_regmap_config'

Fixes: 553b75d4bfe9 ("gpio: regmap: Allow to allocate regmap-irq device")
Signed-off-by: Randy Dunlap 
Reviewed-by: Michael Walle 
Reviewed-by: Andy Shevchenko 
Link: https://lore.kernel.org/r/20251128062739.845403-1-rdunlap@infradead.org
Signed-off-by: Bartosz Golaszewski

gpio: regmap: add the .fixed_direction_output configuration parameter

2025-10-16T10:04:47+00:00

There are GPIO controllers such as the one present in the LX2160ARDB
QIXIS FPGA which have fixed-direction input and output GPIO lines mixed
together in a single register. This cannot be modeled using the
gpio-regmap as-is since there is no way to present the true direction of
a GPIO line.

In order to make this use case possible, add a new configuration
parameter - fixed_direction_output - into the gpio_regmap_config
structure. This will enable user drivers to provide a bitmap that
represents the fixed direction of the GPIO lines.

Signed-off-by: Ioana Ciornei 
Acked-by: Bartosz Golaszewski 
Reviewed-by: Michael Walle 
Signed-off-by: Bartosz Golaszewski

gpio: regmap: Allow to provide init_valid_mask callback

2025-09-16T14:24:48+00:00

Allows to populate the gpio_regmap_config structure with
init_valid_mask() callback to set on the final gpio_chip structure.

Reviewed-by: Michael Walle 
Reviewed-by: Andy Shevchenko 
Reviewed-by: Linus Walleij 
Reviewed-by: Bartosz Golaszewski 
Signed-off-by: Mathieu Dubois-Briand 
Link: https://lore.kernel.org/r/20250824-mdb-max7360-support-v14-6-435cfda2b1ea@bootlin.com
Signed-off-by: Lee Jones

gpio: regmap: Allow to allocate regmap-irq device

2025-09-16T14:24:48+00:00

GPIO controller often have support for IRQ: allow to easily allocate
both gpio-regmap and regmap-irq in one operation.

Reviewed-by: Andy Shevchenko 
Acked-by: Bartosz Golaszewski 
Signed-off-by: Mathieu Dubois-Briand 
Link: https://lore.kernel.org/r/20250824-mdb-max7360-support-v14-5-435cfda2b1ea@bootlin.com
Signed-off-by: Lee Jones

gpio: regmap: Allow ngpio to be read from the property

2025-02-21T08:42:45+00:00

GPIOLIB supports the case when number of supported GPIOs can be read
from the device property. Enable this for drivers that are using
GPIO regmap layer.

Signed-off-by: Andy Shevchenko 
Reviewed-by: Michael Walle 
Reviewed-by: Linus Walleij 
Tested-by: Mathieu Dubois-Briand 
Reviewed-by: Mathieu Dubois-Briand 
Link: https://lore.kernel.org/r/20250213195621.3133406-6-andriy.shevchenko@linux.intel.com
Signed-off-by: Bartosz Golaszewski

gpio: regmap: Group optional assignments together for better understanding

2025-02-21T08:42:45+00:00

Group ngpio_per_reg, reg_stride, and reg_mask_xlate assignments together
with the respective conditional for better understanding what's going on
in the code.

While at it, mark ngpio_per_reg as (Optional) in the kernel-doc
in accordance with what code actually does.

Signed-off-by: Andy Shevchenko 
Reviewed-by: Michael Walle 
Reviewed-by: Linus Walleij 
Tested-by: Mathieu Dubois-Briand 
Reviewed-by: Mathieu Dubois-Briand 
Link: https://lore.kernel.org/r/20250213195621.3133406-4-andriy.shevchenko@linux.intel.com
Signed-off-by: Bartosz Golaszewski

gpio: regmap: move drvdata to config data

2021-06-07T13:39:19+00:00

Drop gpio_regmap_set_drvdata() and instead add it to the configuration
data passed to gpio_regmap_register().

gpio_regmap_set_drvdata() can't really be used in a race free way. This
is because the gpio_regmap object which is needed by _set_drvdata() is
returned by gpio_regmap_register(). On the other hand, the callbacks
which use the drvdata might already be called right after the
gpiochip_add() call in gpio_regmap_register(). Therefore, we have to
provide the drvdata early before we call gpiochip_add().

Signed-off-by: Matti Vaittinen 
Signed-off-by: Michael Walle 
Reviewed-by: Linus Walleij 
Signed-off-by: Bartosz Golaszewski

gpio: regmap: set gpio_chip of_node

2021-03-29T10:20:07+00:00

This is needed for properly registering GPIO regmap as a child of a regmap
pin controller.

Signed-off-by: Álvaro Fernández Rojas 
Reviewed-by: Michael Walle 
Reviewed-by: Andy Shevchenko 
Acked-by: Bartosz Golaszewski 
Link: https://lore.kernel.org/r/20210324081923.20379-3-noltari@gmail.com
Signed-off-by: Linus Walleij

gpio: regmap: fix type clash

2020-07-26T22:27:54+00:00

GPIO_REGMAP_ADDR_ZERO() cast to unsigned long but the actual config
parameters are unsigned int. We use unsigned int here because that is
the type which is used by the underlying regmap.

Fixes: ebe363197e52 ("gpio: add a reusable generic gpio_chip using regmap")
Reported-by: kernel test robot 
Signed-off-by: Michael Walle 
Link: https://lore.kernel.org/r/20200725232337.27581-1-michael@walle.cc
Signed-off-by: Linus Walleij