Re: [RFC PATCH v2 0/3] gpio: add PMIO support to gpio-mmio

[Linus Walleij]

On Mon, Apr 13, 2026 at 12:24 PM Jose Javier Rodriguez Barbarin
<dev-josejavier.rodriguez@xxxxxxxxxx> wrote:

> This series is an RFC for adding port-mapped I/O (PMIO) support to
> gpio-mmio.
>
> This v2 comes with all suggestions done by Linux Walleij in the
> initial review [1].

That name! ;)

> For keeping compatibility with gpio_generic_chip, a new _config struct
> was added instead of extending gpio_generic_chip_config. Using such new
> _config struct, called gpio_generic_chip_port_config, requires a new API
> function gpio_generic_chip_port_init() to access to that new structure.
>
> Besides, structure gpio_chip_reg has been transformed to union. It reflects
> better that MMIO and PMIO chips will only use one of them, saving memory
> as well.
>
> I'm still sending this as RFC but I don't know if I should send this as a
> regular PATCH series.

I think we will usually only merge infrastructure if there is also a
consumer/user of it going in at the same time so these patches will
need to be prepended to a driver patch.

Yours,
Linus Walleij