[0/8] counter: fix, improvements and stm32 timer events support

Message

Fabrice Gasnier Aug. 29, 2023, 1:40 p.m. UTC

This series combines some fix and improvements to the counter interface,
found while stm32 timer counter driver developements.
It also introduces a new tool that can be used for testing.

Then, it improves the stm32 timer counter driver by introducing new signals,
e.g. counting frequency, and missing channels.
It also adds support for interrupt based events using the chrdev interface.
Two event types are added in this series: overflows and capture.

Up to now, stm32 timer counter driver focused mainly on quadrature
encoder feature. With this series, all timer instances can be enabled
for simple counting (with overflow and capture events).

Fabrice Gasnier (8):
  counter: chrdev: fix getting array extensions
  counter: chrdev: remove a typo in header file comment
  tools/counter: add a flexible watch events tool
  mfd: stm32-timers: add support for interrupts
  counter: stm32-timer-cnt: rename quadrature signal
  counter: stm32-timer-cnt: introduce clock signal
  counter: stm32-timer-cnt: populate capture channels and check encoder
  counter: stm32-timer-cnt: add support for events

 drivers/counter/counter-chrdev.c     |   4 +-
 drivers/counter/stm32-timer-cnt.c    | 585 ++++++++++++++++++++++++++-
 drivers/mfd/stm32-timers.c           |  46 +++
 include/linux/mfd/stm32-timers.h     |  26 ++
 include/uapi/linux/counter.h         |   2 +-
 tools/counter/Build                  |   1 +
 tools/counter/Makefile               |   8 +-
 tools/counter/counter_watch_events.c | 348 ++++++++++++++++
 8 files changed, 998 insertions(+), 22 deletions(-)
 create mode 100644 tools/counter/counter_watch_events.c

Comments

William Breathitt Gray Sept. 4, 2023, 7:31 p.m. UTC | #1

On Tue, Aug 29, 2023 at 03:40:21PM +0200, Fabrice Gasnier wrote:
> This series combines some fix and improvements to the counter interface,
> found while stm32 timer counter driver developements.
> It also introduces a new tool that can be used for testing.
> 
> Then, it improves the stm32 timer counter driver by introducing new signals,
> e.g. counting frequency, and missing channels.
> It also adds support for interrupt based events using the chrdev interface.
> Two event types are added in this series: overflows and capture.
> 
> Up to now, stm32 timer counter driver focused mainly on quadrature
> encoder feature. With this series, all timer instances can be enabled
> for simple counting (with overflow and capture events).
> 
> Fabrice Gasnier (8):
>   counter: chrdev: fix getting array extensions
>   counter: chrdev: remove a typo in header file comment
>   tools/counter: add a flexible watch events tool
>   mfd: stm32-timers: add support for interrupts
>   counter: stm32-timer-cnt: rename quadrature signal
>   counter: stm32-timer-cnt: introduce clock signal
>   counter: stm32-timer-cnt: populate capture channels and check encoder
>   counter: stm32-timer-cnt: add support for events
> 
>  drivers/counter/counter-chrdev.c     |   4 +-
>  drivers/counter/stm32-timer-cnt.c    | 585 ++++++++++++++++++++++++++-
>  drivers/mfd/stm32-timers.c           |  46 +++
>  include/linux/mfd/stm32-timers.h     |  26 ++
>  include/uapi/linux/counter.h         |   2 +-
>  tools/counter/Build                  |   1 +
>  tools/counter/Makefile               |   8 +-
>  tools/counter/counter_watch_events.c | 348 ++++++++++++++++
>  8 files changed, 998 insertions(+), 22 deletions(-)
>  create mode 100644 tools/counter/counter_watch_events.c
> 
> -- 
> 2.25.1
> 

Hi Fabrice,

There are a number of precursor changes in this series that are somewhat
independent, so I'll be taking some patches separately to simplify
things and review this patchset a little at a time.

Thanks,

William Breathitt Gray