Re: [PATCH v2] gpio: pca953x: Override IRQ for one of the expanders on Galileo Gen 2

[Linus Walleij <linus.walleij@xxxxxxxxxx>]

On Tue, May 26, 2020 at 3:11 PM Andy Shevchenko
<andriy.shevchenko@xxxxxxxxxxxxxxx> wrote:
> On Tue, May 26, 2020 at 08:31:01AM +0300, Mika Westerberg wrote:
> > On Mon, May 25, 2020 at 10:08:45PM +0300, Andy Shevchenko wrote:
>
> ...
>
> > > +   dev_info(dev, "Applying ACPI interrupt quirk (GPIO %d)\n", pin);
> > > +   return gpiod_to_irq(gpio_to_desc(pin));
> >
> > You need to request the GPIO as well, I missed that from my example.
>
> How? I can't find a function to request GPIO by its descriptor in
> include/linux/gpio/*.

If a gpiochip need to request one of its own GPIOs it should use
gpiochip_request_own_desc() but I don't know if you have all
info at hand to use that in this driver.

Yours,
Linus Walleij