MIME-Version: 1.0
References: <20211110225808.16388-1-prabhakar.mahadev-lad.rj@bp.renesas.com> <20211110225808.16388-6-prabhakar.mahadev-lad.rj@bp.renesas.com>
In-Reply-To: <20211110225808.16388-6-prabhakar.mahadev-lad.rj@bp.renesas.com>
From:   Andy Shevchenko <andy.shevchenko@gmail.com>
Date:   Thu, 11 Nov 2021 22:52:06 +0200
Message-ID: <CAHp75VcM-BWoLmS8yBm9uVcbUb6bZr--+m5qXx=WFe024sWJoQ@mail.gmail.com>
Subject: Re: [RFC PATCH v3 5/7] gpio: gpiolib: Add ngirq member to struct gpio_irq_chip
To:     Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Cc:     Marc Zyngier <maz@kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Rob Herring <robh+dt@kernel.org>,
        Linus Walleij <linus.walleij@linaro.org>,
        Geert Uytterhoeven <geert+renesas@glider.be>,
        Magnus Damm <magnus.damm@gmail.com>,
        Bartosz Golaszewski <bgolaszewski@baylibre.com>,
        Philipp Zabel <p.zabel@pengutronix.de>,
        devicetree <devicetree@vger.kernel.org>,
        Linux-Renesas <linux-renesas-soc@vger.kernel.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Prabhakar <prabhakar.csengg@gmail.com>,
        Biju Das <biju.das.jz@bp.renesas.com>
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

On Thu, Nov 11, 2021 at 12:59 AM Lad Prabhakar
<prabhakar.mahadev-lad.rj@bp.renesas.com> wrote:
>
> Number of GPIO IRQ's supported by the chip is not always

supported GPIO IRQs by the chip

> equal to the number of GPIO pins. For example on Renesas RZ/G2L
> SoC where it has GPIO0-122 pins but at a give point a maximum
> of only 32 GPIO pins can be used as IRQ lines in the IRQC domain.
>
> This patch adds ngirq member to struct gpio_irq_chip and passes
> this as a size to irq_domain_create_hierarchy()/irq_domain_create_simple()
> if it is being set in the driver otherwise fallbacks to using ngpio.

...

>         gc->irq.domain = irq_domain_create_hierarchy(
>                 gc->irq.parent_domain,
>                 0,
> -               gc->ngpio,
> +               gc->irq.ngirq ? gc->irq.ngirq : gc->ngpio,

You may use ?: instead as it's done somewhere else in this module.

>                 gc->irq.fwnode,
>                 &gc->irq.child_irq_domain_ops,
>                 gc);

...

>                 gc->irq.domain = irq_domain_create_simple(fwnode,
> -                       gc->ngpio,
> +                       gc->irq.ngirq ? gc->irq.ngirq : gc->ngpio,

Ditto.

>                         gc->irq.first,
>                         gc->irq.domain_ops ?: &gpiochip_domain_ops,

(^^^ You see?)

>                         gc);

...

> +       /**
> +        * @ngirq:
> +        *
> +        * The number of GPIO IRQ's handled by this IRQ domain; usually is

handled GPIO IRQs

> +        * equal to ngpio

Missed period.

> +        */

-- 
With Best Regards,
Andy Shevchenko