[PATCH v8 01/10] arm64: Add config for Microchip SoC platforms

[Robert Marko]

On Wed, Jul 2, 2025 at 9:57 PM Arnd Bergmann <arnd at kernel.org> wrote:
>
> On Wed, Jul 2, 2025, at 20:35, Robert Marko wrote:
> > Currently, Microchip SparX-5 SoC is supported and it has its own symbol.
> >
> > However, this means that new Microchip platforms that share drivers need
> > to constantly keep updating depends on various drivers.
> >
> > So, to try and reduce this lets add ARCH_MICROCHIP symbol that drivers
> > could instead depend on.
>
> Thanks for updating the series to my suggestion!
>
> > @@ -174,6 +160,27 @@ config ARCH_MESON
> >         This enables support for the arm64 based Amlogic SoCs
> >         such as the s905, S905X/D, S912, A113X/D or S905X/D2
> >
> > +menuconfig ARCH_MICROCHIP
> > +     bool "Microchip SoC support"
> > +
> > +if ARCH_MICROCHIP
> > +
> > +config ARCH_SPARX5
> > +     bool "Microchip Sparx5 SoC family"
>
> This part is the one bit I'm not sure about: The user-visible
> arm64 CONFIG_ARCH_* symbols are usually a little higher-level,
> so I don't think we want both ARCH_MICROCHIP /and/ ARCH_SPARX5
> here, or more generally speaking any of the nested ARCH_*
> symbols.
>
> This version of your patch is going to be slightly annoying
> to existing sparx5 users because updating an old .config
> breaks when ARCH_MICROCHIP is not enabled.
>
> The two options that I would prefer here are
>
> a) make ARCH_SPARX5 a hidden symbol in order to keep the
>    series bisectable, remove it entirely once all references
>    are moved over to ARCH_MICROCHIP
>
> b) Make ARCH_MICROCHIP a hidden symbol that is selected by
>    ARCH_SPARX5 but keep the menu unchanged.

Hi Arnd,
Ok, I see the issue, and I would prefer to go with option b and do
what I did for
AT91 with the hidden ARCH_MICROCHIP symbol to avoid breaking current configs.

>
> Let's see what the sparx5 and at91 maintainers think about
> these options.

Sounds good, let's give them some time before I respin this series.

Regards,
Robert
>
> The other patches all look fine to me.
>
>      Arnd



-- 
Robert Marko
Staff Embedded Linux Engineer
Sartura d.d.
Lendavska ulica 16a
10000 Zagreb, Croatia
Email: robert.marko at sartura.hr
Web: www.sartura.hr