linux-toradex.git/drivers/pps, branch v6.11-rc3

Merge tag 'driver-core-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

2024-07-25T17:42:22+00:00

Pull driver core updates from Greg KH:
 "Here is the big set of driver core changes for 6.11-rc1.

  Lots of stuff in here, with not a huge diffstat, but apis are evolving
  which required lots of files to be touched. Highlights of the changes
  in here are:

   - platform remove callback api final fixups (Uwe took many releases
     to get here, finally!)

   - Rust bindings for basic firmware apis and initial driver-core
     interactions.

     It's not all that useful for a "write a whole driver in rust" type
     of thing, but the firmware bindings do help out the phy rust
     drivers, and the driver core bindings give a solid base on which
     others can start their work.

     There is still a long way to go here before we have a multitude of
     rust drivers being added, but it's a great first step.

   - driver core const api changes.

     This reached across all bus types, and there are some fix-ups for
     some not-common bus types that linux-next and 0-day testing shook
     out.

     This work is being done to help make the rust bindings more safe,
     as well as the C code, moving toward the end-goal of allowing us to
     put driver structures into read-only memory. We aren't there yet,
     but are getting closer.

   - minor devres cleanups and fixes found by code inspection

   - arch_topology minor changes

   - other minor driver core cleanups

  All of these have been in linux-next for a very long time with no
  reported problems"

* tag 'driver-core-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (55 commits)
  ARM: sa1100: make match function take a const pointer
  sysfs/cpu: Make crash_hotplug attribute world-readable
  dio: Have dio_bus_match() callback take a const *
  zorro: make match function take a const pointer
  driver core: module: make module_[add|remove]_driver take a const *
  driver core: make driver_find_device() take a const *
  driver core: make driver_[create|remove]_file take a const *
  firmware_loader: fix soundness issue in `request_internal`
  firmware_loader: annotate doctests as `no_run`
  devres: Correct code style for functions that return a pointer type
  devres: Initialize an uninitialized struct member
  devres: Fix memory leakage caused by driver API devm_free_percpu()
  devres: Fix devm_krealloc() wasting memory
  driver core: platform: Switch to use kmemdup_array()
  driver core: have match() callback in struct bus_type take a const *
  MAINTAINERS: add Rust device abstractions to DRIVER CORE
  device: rust: improve safety comments
  MAINTAINERS: add Danilo as FIRMWARE LOADER maintainer
  MAINTAINERS: add Rust FW abstractions to FIRMWARE LOADER
  firmware: rust: improve safety comments
  ...

parport: Remove parport_driver.devmodel

2024-07-03T14:44:22+00:00

'devmodel' hasn't actually been used since:
  'commit 3275158fa52a ("parport: remove use of devmodel")'
and everyone now has it set to true and has been fixed up; remove
the flag.

(There are still comments all over about it)

Signed-off-by: Dr. David Alan Gilbert 
Acked-by: Sudip Mukherjee 
Link: https://lore.kernel.org/r/20240502154823.67235-4-linux@treblig.org
Signed-off-by: Greg Kroah-Hartman

pps: clients: gpio: Convert to platform remove callback returning void

2024-05-27T08:13:55+00:00

The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is ignored (apart
from emitting a warning) and this typically results in resource leaks.

To improve here there is a quest to make the remove callback return
void. In the first step of this quest all drivers are converted to
.remove_new(), which already returns void. Eventually after all drivers
are converted, .remove_new() will be renamed to .remove().

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Acked-by: Rodolfo Giometti 
Link: https://lore.kernel.org/r/f4b9402af72e5f285c8b0f068076a76418f653f5.1709886922.git.u.kleine-koenig@pengutronix.de
Signed-off-by: Uwe Kleine-König

pps: remove usage of the deprecated ida_simple_xx() API

2024-04-29T15:20:06+00:00

ida_alloc() and ida_free() should be preferred to the deprecated
ida_simple_get() and ida_simple_remove().

This is less verbose.

Link: https://lkml.kernel.org/r/9f681747d446b874952a892491387d79ffe565a9.1713089394.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Christophe JAILLET 
Cc: Rodolfo Giometti 
Cc: Greg Kroah-Hartman 
Signed-off-by: Andrew Morton

pps: use cflags-y instead of EXTRA_CFLAGS

2024-03-07T21:51:39+00:00

Commit f77bf01425b1 ("kbuild: introduce ccflags-y, asflags-y and
ldflags-y") deprecates use of EXTRA_CFLAGS in the kernel build.

This has been cleaned up in the whole kernel tree long ago, but this one
single place must have been missed.

Replace the EXTRA_CFLAGS use by the common pattern for such debug flags.
No functional change.

Signed-off-by: Lukas Bulwahn 
Acked-by: Rodolfo Giometti 
Link: https://lore.kernel.org/r/20240306120515.15711-1-lukas.bulwahn@gmail.com
Signed-off-by: Greg Kroah-Hartman

driver core: class: remove module * from class_create()

2023-03-17T14:16:33+00:00

The module pointer in class_create() never actually did anything, and it
shouldn't have been requred to be set as a parameter even if it did
something.  So just remove it and fix up all callers of the function in
the kernel tree at the same time.

Cc: "Rafael J. Wysocki" 
Acked-by: Benjamin Tissoires 
Link: https://lore.kernel.org/r/20230313181843.1207845-4-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman

tty/serial: Make ->dcd_change()+uart_handle_dcd_change() status bool active

2023-01-19T15:04:35+00:00

Convert status parameter for ->dcd_change() and
uart_handle_dcd_change() to bool which matches to how the parameter is
used.

Rename status to active to better describe what the parameter means.

Acked-by: Rodolfo Giometti 
Reviewed-by: Jiri Slaby 
Signed-off-by: Ilpo Järvinen 
Link: https://lore.kernel.org/r/20230117090358.4796-9-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman

pps: generators: pps_gen_parport: Switch to use module_parport_driver()

2022-03-18T13:01:19+00:00

Switch to use module_parport_driver() to reduce boilerplate code.

Note, it doesn't matter when we check the module parameter. If it was
writable we even would have more flexibility of changing it at runtime
(when built-in the kernel) after this patch.

Acked-by: Rodolfo Giometti 
Signed-off-by: Andy Shevchenko 
Link: https://lore.kernel.org/r/20220210134943.62026-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman

pps: clients: gpio: Propagate return value from pps_gpio_probe

2022-02-04T14:33:42+00:00

If the pps-gpio driver was probed prior to the GPIO device it uses, the
devm_gpiod_get call returned an -EPROBE_DEFER error, but pps_gpio_probe
replaced that error code with -EINVAL, causing the pps-gpio probe to
fail and not be retried later. Propagate the error return value so that
deferred probe works properly.

Fixes: 161520451dfa (pps: new client driver using GPIO)
Reviewed-by: Andy Shevchenko 
Acked-by: Rodolfo Giometti 
Signed-off-by: Robert Hancock 
Signed-off-by: Rodolfo Giometti 
Link: https://lore.kernel.org/r/20220112205214.2060954-1-robert.hancock@calian.com
Signed-off-by: Greg Kroah-Hartman

pps: clients: parport: Switch to use module_parport_driver()

2021-07-29T15:29:14+00:00

Switch to use module_parport_driver() to reduce boilerplate code.

Acked-by: Rodolfo Giometti 
Signed-off-by: Andy Shevchenko 
Link: https://lore.kernel.org/r/20210607153729.58623-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman