Re: [PATCH v3 2/7] gpio: regmap: add gpio_regmap_get_gpiochip() accessor

[Andy Shevchenko]

On Fri, Jun 19, 2026 at 11:08:30PM +0200, Linus Walleij wrote:
> On Mon, Jun 8, 2026 at 4:41 PM Michael Walle <mwalle@xxxxxxxxxx> wrote:
> 
> > >>> Without an accessor like gpio_regmap_get_gpiochip(), we cannot retrieve the
> > >>> gpio_chip instantiated inside gpio-regmap.c to fulfill these requirements in our
> > >>> map() function.
> >
> > Why is gpiochip_irq_reqres() called in the first place? Isn't that
> > only called if the irq handling is set up via gc->irq.chip and not
> > via gpiochip_irqchip_add_domain() like in gpio-regmap?
> 
> Not really, the gpiochip_irq_reqres() is called to mark that a
> GPIO line is used for IRQ, so the gpiolib cannot turn this
> GPIO into an output line, gpiod_direction_out() will fail
> on lines used for IRQ. So it's a failsafe.
> 
> You can live without it of course, but then you don't get
> this failsafe.

So, when we instantiate our own domain in regmap GPIO, we should have those
callbacks be defined somewhere?

-- 
With Best Regards,
Andy Shevchenko