linux-toradex.git/include/linux/gpio, branch v6.9-rc5

gpiolib: swnode: Remove wrong header inclusion

2024-04-17T20:48:14+00:00

The flags in the software node properties are supposed to be
the GPIO lookup flags, which are provided by gpio/machine.h,
as the software nodes are the kernel internal thing and doesn't
need to rely to any of ABIs.

Fixes: e7f9ff5dc90c ("gpiolib: add support for software nodes")
Signed-off-by: Andy Shevchenko 
Signed-off-by: Bartosz Golaszewski

gpiolib: Add stubs for GPIO lookup functions

2024-03-26T11:44:56+00:00

The gpio_device_find_by_() functions do not have stubs which means that if
they are referenced from code with an optiona dependency on gpiolib then
the code will fail to link. Add stubs for lookups via fwnode and label. I
have not added a stub for plain gpio_device_find() since it seems harder to
see a use case for that which does not depend on gpiolib.

With the addition of the GPIO reset controller (which lacks a gpiolib
dependency) to the arm64 defconfig this is causing build breaks for arm64
virtconfig in -next:

aarch64-linux-gnu-ld: drivers/reset/core.o: in function `__reset_add_reset_gpio_lookup':
 /build/stage/linux/drivers/reset/core.c:861:(.text+0xccc): undefined reference to `gpio_device_find_by_fwnode'

Signed-off-by: Mark Brown 
Reviewed-by: Krzysztof Kozlowski 
Signed-off-by: Bartosz Golaszewski

Merge tag 'pinctrl-v6.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl

2024-03-14T17:22:26+00:00

Pull pin control updates from Linus Walleij:
 "No core changes this time around.

  New drivers:

   - New driver for Renesas R8A779H0 also known as R-Car V4M.

   - New driver for the Awinic AW9523/B I2C GPIO expander. I found this
     living out-of-tree in OpenWrt as an upstream attempt had stalled on
     the finishing line, so I picked it up and finished the job.

  Improvements:

   - The Nomadik pin control driver was for years re-used out of tree
     for the ST STA chips, and now the IP was re-used in a MIPS
     automotive SoC called MobilEyeq5, so it has been split in pin
     control and GPIO drivers so the latter can be reused by MobilEyeq5.
     (Along with a long list of cleanups)

   - A lot of overall cleanup and tidying up"

* tag 'pinctrl-v6.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (87 commits)
  drivers/gpio/nomadik: move dummy nmk_gpio_dbg_show_one() to header
  gpio: nomadik: remove BUG_ON() in nmk_gpio_populate_chip()
  dt-bindings: pinctrl: qcom: update compatible name for match with driver
  pinctrl: aw9523: Make the driver tristate
  pinctrl: nomadik: fix dereference of error pointer
  gpio: nomadik: Back out some managed resources
  pinctrl: aw9523: Add proper terminator
  pinctrl: core: comment that pinctrl_add_gpio_range() is deprecated
  pinctrl: pinmux: Suppress error message for -EPROBE_DEFER
  pinctrl: Add driver for Awinic AW9523/B I2C GPIO Expander
  dt-bindings: pinctrl: Add bindings for Awinic AW9523/AW9523B
  gpio: nomadik: Finish conversion to use firmware node APIs
  gpio: nomadik: fix Kconfig dependencies inbetween pinctrl & GPIO
  pinctrl: da9062: Add OF table
  dt-bindings: pinctrl: at91: add sam9x7
  pinctrl: ocelot: remove redundant assignment to variable ret
  gpio: nomadik: grab optional reset control and deassert it at probe
  gpio: nomadik: support mobileye,eyeq5-gpio
  gpio: nomadik: handle variadic GPIO count
  gpio: nomadik: support shared GPIO IRQs
  ...

drivers/gpio/nomadik: move dummy nmk_gpio_dbg_show_one() to header

2024-03-12T11:53:35+00:00

When `CONFIG_DEBUG_FS` is disabled, nmk_gpio_dbg_show_one() is an
empty dummy function; this however triggers a `-Wmissing-prototypes`
warning and later a linker error because the function is also used by
drivers/pinctrl/nomadik/pinctrl-nomadik.c, therefore it needs to be
non-static.

To allow both sources to access this dummy function, this patch moves
it to the header, adding the `#ifdef CONFIG_DEBUG_FS` there as well.

Signed-off-by: Max Kellermann 
Link: https://lore.kernel.org/r/20240311133223.3429428-1-max.kellermann@ionos.com
Signed-off-by: Linus Walleij

Merge tag 'v6.8-rc7' into gpio/for-next

2024-03-05T18:24:34+00:00

Linux 6.8-rc7

gpio: nomadik: Finish conversion to use firmware node APIs

2024-03-03T08:43:10+00:00

Previously driver got a few updates in order to replace OF APIs by
respective firmware node, however it was not finished to the logical
end, e.g., some APIs that has been used are still require OF node
to be passed. Finish that job by converting leftovers to use firmware
node APIs.

Signed-off-by: Andy Shevchenko 
Link: https://lore.kernel.org/r/20240302173401.217830-1-andy.shevchenko@gmail.com
Signed-off-by: Linus Walleij

gpio: nomadik: support mobileye,eyeq5-gpio

2024-02-29T09:36:55+00:00

We create a custom compatible for the STA2X11 IP block as integrated
into the Mobileye EyeQ5 platform. Its wake and alternate functions have
been disabled, we want to avoid touching those registers.

We both do: (1) early return in functions that do not support the
platform, but with warnings, and (2) avoid calling those functions in
the first place.

We ensure that pinctrl-nomadik is not used with this STA2X11 variant.

Reviewed-by: Linus Walleij 
Signed-off-by: Théo Lebrun 
Link: https://lore.kernel.org/r/20240228-mbly-gpio-v2-24-3ba757474006@bootlin.com
Signed-off-by: Linus Walleij

gpio: nomadik: extract GPIO platform driver from drivers/pinctrl/nomadik/

2024-02-29T09:22:33+00:00

Previously, drivers/pinctrl/nomadik/pinctrl-nomadik.c registered two
platform drivers: pinctrl & GPIO. Move the GPIO aspect to the
drivers/gpio/ folder, as would be expected.

Both drivers are intertwined for a reason; pinctrl requires access to
GPIO registers for pinmuxing, pull-disable, disabling interrupts while
setting the muxing and wakeup control. Information sharing is done
through a shared array containing GPIO chips and a few helper
functions. That shared array is not touched from gpio-nomadik when
CONFIG_PINCTRL_NOMADIK is not defined.

Make no change to the code that moved into gpio-nomadik; there should be
no behavior change following. A few functions are shared and header
comments are added. Checkpatch warnings are addressed. NUM_BANKS is
renamed to NMK_MAX_BANKS.

It is supported to compile gpio-nomadik without pinctrl-nomadik. The
opposite is not true.

Signed-off-by: Théo Lebrun 
Link: https://lore.kernel.org/r/20240228-mbly-gpio-v2-6-3ba757474006@bootlin.com
Signed-off-by: Linus Walleij

gpio: provide for_each_hwgpio()

2024-02-26T15:43:51+00:00

We only provide iterators for requested GPIOs to provider drivers. In
order to allow them to display debug information about all GPIOs, let's
provide a variant for iterating over all GPIOs.

Signed-off-by: Bartosz Golaszewski 
Reviewed-by: Linus Walleij

gpio: constify opaque pointer "data" in gpio_device_find()

2024-02-17T19:02:22+00:00

The opaque pointer "data" in each match function used by
gpio_device_find() is a pointer to const, thus the same argument passed
to gpio_device_find() can adjusted similarly.

Signed-off-by: Krzysztof Kozlowski 
Signed-off-by: Bartosz Golaszewski