Re: [PATCH 6/7] pinctrl: pinmux: Introduce API to check if a pin is requested

[Linus Walleij <linus.walleij@xxxxxxxxxx>]

On Thu, Oct 17, 2024 at 1:39 PM Prabhakar <prabhakar.csengg@xxxxxxxxx> wrote:

> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
>
> Introduce `pin_requested` API to check if a pin is currently requested.
> This API allows pinctrl drivers to verify whether a pin is requested or
> not by checking if the pin is owned by either `gpio_owner` or `mux_owner`.
>
> GPIO pins used as interrupts through the `interrupts` DT property do not
> follow the usual `gpio_request`/`pin_request` path, unlike GPIO pins used
> as interrupts via the `gpios` property. As a result, such pins were
> reported as `UNCLAIMED` in the `pinmux-pins` sysfs file, even though they
> were in use as interrupts.
>
> With the newly introduced API, pinctrl drivers can check if a pin is
> already requested by the pinctrl core and ensure that pin is requested
> during when using as irq. This helps to ensure that the `pinmux-pins`
> sysfs file reflects the correct status of the pin.
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>

Provided that Geert applies 7/7:
Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx>

Yours,
Linus Walleij