linux-kernel - Re: [PATCH] gpio: regmap: disable IRQ domain without GPIOLIB

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Date:   Thu, 4 Mar 2021 09:54:28 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Michael Walle <michael@...le.cc>
Cc:     Álvaro Fernández Rojas <noltari@...il.com>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] gpio: regmap: disable IRQ domain without GPIOLIB_IRQCHIP

On Thu, Mar 4, 2021 at 9:29 AM Michael Walle <michael@...le.cc> wrote:
> Am 2021-03-04 08:05, schrieb Álvaro Fernández Rojas:

> > The current code doesn't check if GPIOLIB_IRQCHIP is enabled, which
> > results in
> > a compilation error when trying to build gpio-regmap without having
> > selected
> > CONFIG_GPIOLIB_IRQCHIP.
> >
> > Fixes: ebe363197e52 ("gpio: add a reusable generic gpio_chip using
> > regmap")
> > Signed-off-by: Álvaro Fernández Rojas <noltari@...il.com>
>
> Nice catch.
>
> However, instead of having that ifdef, commit 6a45b0e2589f ("gpiolib:
> Introduce gpiochip_irqchip_add_domain()") could be fixed. That one is
> missing a stub if CONFIG_GPIOLIB_IRQCHIP is not defined.
>
> --- a/include/linux/gpio/driver.h
> +++ b/include/linux/gpio/driver.h
> @@ -624,8 +624,16 @@ void gpiochip_irq_domain_deactivate(struct
> irq_domain *domain,
>   bool gpiochip_irqchip_irq_valid(const struct gpio_chip *gc,
>                                  unsigned int offset);
>
> +#ifdef CONFIG_GPIOLIB_IRQCHIP
>   int gpiochip_irqchip_add_domain(struct gpio_chip *gc,
>                                  struct irq_domain *domain);
> +#else
> +static inline int gpiochip_irqchip_add_domain(struct gpio_chip *gc,
> +                                             struct irq_domain *domain)
> +{
> +       return 0;
> +}
> +#endif /* CONFIG_GPIOLIB_IRQCHIP */
>
> Linus, do you agree?

Oh that is a better fix. Please go with this Álvaro!

Yours,
Linus Walleij