linux-toradex.git/drivers/clocksource/timer-stm32.c, branch v7.0-rc5

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-22T01:09:51+00:00

This was done entirely with mindless brute force, using

    git grep -l '\

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21T09:02:28+00:00

This is the result of running the Coccinelle script from
scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to
avoid scalar types (which need careful case-by-case checking), and
instead replace kmalloc-family calls that allocate struct or union
object instances:

Single allocations:	kmalloc(sizeof(TYPE), ...)
are replaced with:	kmalloc_obj(TYPE, ...)

Array allocations:	kmalloc_array(COUNT, sizeof(TYPE), ...)
are replaced with:	kmalloc_objs(TYPE, COUNT, ...)

Flex array allocations:	kmalloc(struct_size(PTR, FAM, COUNT), ...)
are replaced with:	kmalloc_flex(*PTR, FAM, COUNT, ...)

(where TYPE may also be *VAR)

The resulting allocations no longer return "void *", instead returning
"TYPE *".

Signed-off-by: Kees Cook

clocksource/drivers/stm32: Fix all kernel-doc warnings

2024-01-22T12:15:38+00:00

Add a "Returns:" section in one function description.
Use the correct function name in another function description.

These changes prevent 2 warnings:

timer-stm32.c:79: warning: No description found for return value of 'stm32_timer_of_bits_get'
timer-stm32.c:189: warning: expecting prototype for stm32_timer_width(). Prototype was for stm32_timer_set_width() instead

Signed-off-by: Randy Dunlap 
Cc: Daniel Lezcano 
Cc: Thomas Gleixner 
Cc: Fabrice Gasnier 
Cc: linux-stm32@st-md-mailman.stormreply.com
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Daniel Lezcano 
Link: https://lore.kernel.org/r/20240120173615.14618-1-rdunlap@infradead.org

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194

2019-05-30T18:29:22+00:00

Based on 1 normalized pattern(s):

  license terms gnu general public license gpl version 2

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 161 file(s).

Signed-off-by: Thomas Gleixner 
Reviewed-by: Allison Randal 
Reviewed-by: Alexios Zavras 
Reviewed-by: Steve Winslow 
Reviewed-by: Richard Fontana 
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190528170027.447718015@linutronix.de
Signed-off-by: Greg Kroah-Hartman

clocksource/drivers/stm32: Fix error return code

2018-06-12T21:54:01+00:00

Return an error code on failure.

Problem found using Coccinelle.

Signed-off-by: Julia Lawall 
Signed-off-by: Thomas Gleixner 
Cc: Daniel Lezcano 
Cc: kernel-janitors@vger.kernel.org
Cc: Maxime Coquelin 
Cc: Alexandre Torgue 
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lkml.kernel.org/r1528640655-18948-3-git-send-email-Julia.Lawall@lip6.fr

clocksource/drivers/stm32: Start the timer's counter sooner

2018-01-08T16:57:26+00:00

As we have a lot of timers on this platform, we can have potentially all the
timers enabled in the DT, so we don't want to start the timer for every probe
otherwise they will be running for nothing as only one will be used.

Start the timer only when setting the mode or when the clocksource is
enabled.

Tested-by: Benjamin Gaignard 
Signed-off-by: Daniel Lezcano 
Acked-by: Benjamin Gaignard 
Cc: Alexandre Torgue 
Cc: Linus Torvalds 
Cc: Maxime Coquelin 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Link: http://lkml.kernel.org/r/1515418139-23276-20-git-send-email-daniel.lezcano@linaro.org
Signed-off-by: Ingo Molnar

clocksource/drivers/stm32: Add the timer delay callback

2018-01-08T16:57:26+00:00

Add the timer delay callback, that saves us ~90ms of boot time.

Tested-by: Benjamin Gaignard 
Signed-off-by: Daniel Lezcano 
Acked-by: Benjamin Gaignard 
Cc: Alexandre Torgue 
Cc: Linus Torvalds 
Cc: Maxime Coquelin 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Link: http://lkml.kernel.org/r/1515418139-23276-19-git-send-email-daniel.lezcano@linaro.org
Signed-off-by: Ingo Molnar

clocksource/drivers/stm32: Add clocksource functionality

2018-01-08T16:57:26+00:00

The scene is set for the clocksource functionality, let's add it for this driver.

Tested-by: Benjamin Gaignard 
Signed-off-by: Benjamin Gaignard 
Signed-off-by: Daniel Lezcano 
Acked-by: Benjamin Gaignard 
Cc: Alexandre Torgue 
Cc: Linus Torvalds 
Cc: Maxime Coquelin 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Link: http://lkml.kernel.org/r/1515418139-23276-18-git-send-email-daniel.lezcano@linaro.org
Signed-off-by: Ingo Molnar

clocksource/drivers/stm32: Factor out more of the clockevent code

2018-01-08T16:57:26+00:00

In order to prepare the clocksource code, let's factor out the clockevent
code, split the prescaler and timer width code into separate functions.

Tested-by: Benjamin Gaignard 
Signed-off-by: Daniel Lezcano 
Acked-by: Benjamin Gaignard 
Cc: Alexandre Torgue 
Cc: Linus Torvalds 
Cc: Maxime Coquelin 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Link: http://lkml.kernel.org/r/1515418139-23276-17-git-send-email-daniel.lezcano@linaro.org
[ Small edits. ]
Signed-off-by: Ingo Molnar

clocksource/drivers/stm32: Add oneshot mode

2018-01-08T16:57:26+00:00

The stm32 timer block is able to have a counter and a comparator.

Instead of using the auto-reload register for periodic events, we switch
to oneshot mode by using the comparator register.

The timer is able to generate an interrupt when the counter overflows but
we don't want that as this counter will be use as a clocksource in the next
patches. So it is disabled by the UDIS bit of the control register.

Tested-by: Benjamin Gaignard 
Signed-off-by: Benjamin Gaignard 
Signed-off-by: Daniel Lezcano 
Acked-by: Benjamin Gaignard 
Cc: Alexandre Torgue 
Cc: Linus Torvalds 
Cc: Maxime Coquelin 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Link: http://lkml.kernel.org/r/1515418139-23276-16-git-send-email-daniel.lezcano@linaro.org
Signed-off-by: Ingo Molnar