linux.git/drivers/pinctrl/nxp, branch for-next

pinctrl: s32: add missing pins definitions

2024-10-09T16:16:56+00:00

Added definitions for some pins which were missing from the
S32G2 SIUL2 pinctrl driver. These pins are used by the JTAG,
PFE and LLCE hardware modules.

Reviewed-by: Matthias Brugger 
Signed-off-by: Andrei Stefanescu 
Link: https://lore.kernel.org/20241002135920.3647322-2-andrei.stefanescu@oss.nxp.com
Signed-off-by: Linus Walleij

pinctrl: s32cc: add update and overwrite options when setting pinconf

2024-08-05T08:17:43+00:00

The previous pinconf settings(made by the bootloader) need to be
overwritten when configuring the pinctrl of a driver during the boot
process.

Configuring the bias of a GPIO at runtime (e.g. pull-up) needs to
preserve the other settings unaltered.

This patch introduces changes to differentiate between the two cases.

Signed-off-by: Radu Pirea 
Signed-off-by: Florin Buica 
Signed-off-by: Andrei Stefanescu 
Link: https://lore.kernel.org/20240723131832.1171036-4-andrei.stefanescu@oss.nxp.com
Signed-off-by: Linus Walleij

pinctrl: s32cc: configure PIN_CONFIG_DRIVE_PUSH_PULL

2024-08-05T08:17:43+00:00

Previously, it was possible to only configure the open-drain for a pin.
However, after a pin got configured with open-drain, there wasn't any
way to disable it. Add the push-pull configuration in order to reverse
the open-drain configuration.

Signed-off-by: Florin Buica 
Signed-off-by: Andrei Stefanescu 
Link: https://lore.kernel.org/20240723131832.1171036-3-andrei.stefanescu@oss.nxp.com
Signed-off-by: Linus Walleij

pinctrl: s32cc: enable the input buffer for a GPIO

2024-08-05T08:17:43+00:00

The IBE (input buffer enable) should be enabled for a GPIO. Reading the
value will return the one from the input register, writing the value
will return the one from the output register.

This offers the flexibility to check if the value intended to be set
matches the actual physical one.

Signed-off-by: Florin Buica 
Signed-off-by: Andrei Stefanescu 
Link: https://lore.kernel.org/20240723131832.1171036-2-andrei.stefanescu@oss.nxp.com
Signed-off-by: Linus Walleij

of: remove internal arguments from of_property_for_each_u32()

2024-07-25T11:53:47+00:00

The of_property_for_each_u32() macro needs five parameters, two of which
are primarily meant as internal variables for the macro itself (in the
for() clause). Yet these two parameters are used by a few drivers, and this
can be considered misuse or at least bad practice.

Now that the kernel uses C11 to build, these two parameters can be avoided
by declaring them internally, thus changing this pattern:

  struct property *prop;
  const __be32 *p;
  u32 val;

  of_property_for_each_u32(np, "xyz", prop, p, val) { ... }

to this:

  u32 val;

  of_property_for_each_u32(np, "xyz", val) { ... }

However two variables cannot be declared in the for clause even with C11,
so declare one struct that contain the two variables we actually need. As
the variables inside this struct are not meant to be used by users of this
macro, give the struct instance the noticeable name "_it" so it is visible
during code reviews, helping to avoid new code to use it directly.

Most usages are trivially converted as they do not use those two
parameters, as expected. The non-trivial cases are:

 - drivers/clk/clk.c, of_clk_get_parent_name(): easily doable anyway
 - drivers/clk/clk-si5351.c, si5351_dt_parse(): this is more complex as the
   checks had to be replicated in a different way, making code more verbose
   and somewhat uglier, but I refrained from a full rework to keep as much
   of the original code untouched having no hardware to test my changes

All the changes have been build tested. The few for which I have the
hardware have been runtime-tested too.

Reviewed-by: Andre Przywara  # drivers/clk/sunxi/clk-simple-gates.c, drivers/clk/sunxi/clk-sun8i-bus-gates.c
Acked-by: Bartosz Golaszewski  # drivers/gpio/gpio-brcmstb.c
Acked-by: Nicolas Ferre  # drivers/irqchip/irq-atmel-aic-common.c
Acked-by: Jonathan Cameron  # drivers/iio/adc/ti_am335x_adc.c
Acked-by: Uwe Kleine-König  # drivers/pwm/pwm-samsung.c
Acked-by: Richard Leitner  # drivers/usb/misc/usb251xb.c
Acked-by: Mark Brown  # sound/soc/codecs/arizona.c
Reviewed-by: Richard Fitzgerald  # sound/soc/codecs/arizona.c
Acked-by: Michael Ellerman  # arch/powerpc/sysdev/xive/spapr.c
Acked-by: Stephen Boyd  # clk
Signed-off-by: Luca Ceresoli 
Acked-by: Lee Jones 
Link: https://lore.kernel.org/r/20240724-of_property_for_each_u32-v3-1-bea82ce429e2@bootlin.com
Signed-off-by: Rob Herring (Arm)

pinctrl: s32cc: Use scope based of_node_put() cleanups

2024-06-26T09:58:05+00:00

Use scope based of_node_put() cleanup to simplify code.

Signed-off-by: Peng Fan 
Link: https://lore.kernel.org/20240504-pinctrl-cleanup-v2-12-26c5f2dc1181@nxp.com
Signed-off-by: Linus Walleij

pinctrl: s32cc: Avoid possible string truncation

2023-11-14T13:43:37+00:00

With "W=1" and "-Wformat-truncation" build options, the kernel test robot
found a possible string truncation warning in pinctrl-s32cc.c, which uses
an 8-byte char array to hold a memory region name "map%u". Since the
maximum number of digits that a u32 value can present is 10, and the "map"
string occupies 3 bytes with a termination '\0', which means the rest 4
bytes cannot fully present the integer "X" that exceeds 4 digits.

Here we check if the number >= 10000, which is the lowest value that
contains more than 4 digits.

Reported-by: kernel test robot 
Closes: https://lore.kernel.org/oe-kbuild-all/202311030159.iyUGjNGF-lkp@intel.com/
Signed-off-by: Chester Lin 
Link: https://lore.kernel.org/r/20231107141044.24058-1-clin@suse.com
Signed-off-by: Linus Walleij

pinctrl: Explicitly include correct DT includes

2023-07-20T19:41:24+00:00

The DT of_device.h and of_platform.h date back to the separate
of_platform_bus_type before it as merged into the regular platform bus.
As part of that merge prepping Arm DT support 13 years ago, they
"temporarily" include each other. They also include platform_device.h
and of.h. As a result, there's a pretty much random mix of those include
files used throughout the tree. In order to detangle these headers and
replace the implicit includes with struct declarations, users need to
explicitly include the correct includes.

Signed-off-by: Rob Herring 
Reviewed-by: Damien Le Moal 
Acked-by: Emil Renner Berthing 
Acked-by: Geert Uytterhoeven 
Link: https://lore.kernel.org/r/20230714174901.4062397-1-robh@kernel.org
Signed-off-by: Linus Walleij

pinctrl: nxp: Fix resource leaks in for_each_child_of_node() loops

2023-06-09T07:24:51+00:00

Ensure child node references are decremented properly in the error path.

Signed-off-by: Lu Hongfei 
Link: https://lore.kernel.org/r/20230606070201.14249-1-luhongfei@vivo.com
Signed-off-by: Linus Walleij

pinctrl: s32: separate const device data from struct s32_pinctrl_soc_info

2023-06-02T07:36:25+00:00

The .data field in struct of_device_id is used as a const member so it's
inappropriate to attach struct s32_pinctrl_soc_info with of_device_id
because some members in s32_pinctrl_soc_info need to be filled by
pinctrl-s32cc at runtime.

For this reason, struct s32_pinctrl_soc_info must be allocated in
pinctrl-s32cc and then create a new struct s32_pinctrl_soc_data in order
to represent const .data in of_device_id. To combine these two structures,
a s32_pinctrl_soc_data pointer is introduced in s32_pinctrl_soc_info.

Besides, use of_device_get_match_data() instead of of_match_device() since
the driver only needs to retrieve the .data from of_device_id.

Link: https://lore.kernel.org/r/20230329041630.8011-1-clin@suse.com/
Suggested-by: Andy Shevchenko 
Signed-off-by: Chester Lin 
Reviewed-by: Andy Shevchenko 
Signed-off-by: Linus Walleij