Re: [PATCH v4 4/7] gpio: gpiolib: Dont assume child_offset_to_irq callback always succeeds

[Linus Walleij]

On Wed, May 18, 2022 at 9:30 PM Lad Prabhakar
<prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx> wrote:

> On Renesas RZ/G2L SoC not all the GPIO pins can be simultaneously used as
> interrupts. The SoC allows 32 interrupts which is first come first serve
> basis and is dynamic i.e. if there is a free slot (after rmmod) this can
> be used by other GPIO pins being used as an interrupt.
>
> To handle such cases change child_offset_to_irq() callback to return error
> codes in case of failure. All the users of child_offset_to_irq() callback
> are also updated with this API change.
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>

This looks very useful!
Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx>

Yours,
Linus Walleij