Re: [PATCH] Add Altera hardware mutex driver

[Arnd Bergmann]

On Thu, Mar 31, 2022 at 11:49 PM <niravkumar.l.rabara@xxxxxxxxx> wrote:
>
> From: Niravkumar L Rabara <niravkumar.l.rabara@xxxxxxxxx>
>
> Altera hardware mutex soft IP provides hardware assistance for
> synchronization and mutual exclusion between processors in
> asymmetric/symmetric multiprocessing (AMP/SMP) system or
> multi processes/threads in uniprocessor system.
>
> Signed-off-by: Niravkumar L Rabara <niravkumar.l.rabara@xxxxxxxxx>
> ---
>  .../bindings/misc/altera-hwmutex.yaml         |  47 +++
>  drivers/misc/Kconfig                          |   6 +
>  drivers/misc/Makefile                         |   1 +
>  drivers/misc/altera_hwmutex.c                 | 321 ++++++++++++++++++
>  include/linux/altera_hwmutex.h                |  42 +++

Why does this use a custom interface rather than the generic drivers/hwspinlock/
subsystem?

        Arnd