linux-kernel - Re: [PATCH] gpio: mxc: use dynamic allocation of base

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Date:   Mon, 6 Mar 2023 11:03:38 +0100
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Dario Binacchi <dario.binacchi@...rulasolutions.com>,
        Linus Walleij <linus.walleij@...aro.org>
Cc:     linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org
Subject: Re: [PATCH] gpio: mxc: use dynamic allocation of base

On Sun, Feb 26, 2023 at 9:53 PM Dario Binacchi
<dario.binacchi@...rulasolutions.com> wrote:
>
> Since commit 502df79b860563d7 ("gpiolib: Warn on drivers still using static
> gpiobase allocation"), one or more warnings are printed during boot on
> systems where static allocation of GPIO base is used:
>
> [    1.611480] gpio gpiochip0: Static allocation of GPIO base is deprecated, use dynamic allocation.
> [    1.622893] gpio gpiochip1: Static allocation of GPIO base is deprecated, use dynamic allocation.
> [    1.633272] gpio gpiochip2: Static allocation of GPIO base is deprecated, use dynamic allocation.
> [    1.643388] gpio gpiochip3: Static allocation of GPIO base is deprecated, use dynamic allocation.
> [    1.653474] gpio gpiochip4: Static allocation of GPIO base is deprecated, use dynamic allocation.
>
> So let's follow the suggestion and use dynamic allocation.
>
> Signed-off-by: Dario Binacchi <dario.binacchi@...rulasolutions.com>
> ---
>
>  drivers/gpio/gpio-mxc.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/gpio/gpio-mxc.c b/drivers/gpio/gpio-mxc.c
> index 9d0cec4b82a3..abc129a88a62 100644
> --- a/drivers/gpio/gpio-mxc.c
> +++ b/drivers/gpio/gpio-mxc.c
> @@ -462,8 +462,7 @@ static int mxc_gpio_probe(struct platform_device *pdev)
>         port->gc.request = gpiochip_generic_request;
>         port->gc.free = gpiochip_generic_free;
>         port->gc.to_irq = mxc_gpio_to_irq;
> -       port->gc.base = (pdev->id < 0) ? of_alias_get_id(np, "gpio") * 32 :
> -                                            pdev->id * 32;
> +       port->gc.base = -1;
>
>         err = devm_gpiochip_add_data(&pdev->dev, &port->gc, port);
>         if (err)
> --
> 2.32.0
>

Linus,

I'm afraid we'll need to do something about this warning, because
we're getting the same patch for like 4th time already...

Bart