linux-kernel - Re: [PATCH v3 2/5] irqchip: Add RZ/G2L IA55 Interrupt Controller driver

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Date:   Thu, 12 May 2022 09:26:31 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Marc Zyngier <maz@...nel.org>
Cc:     Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Phil Edworthy <phil.edworthy@...esas.com>,
        Biju Das <biju.das.jz@...renesas.com>,
        Prabhakar <prabhakar.csengg@...il.com>
Subject: Re: [PATCH v3 2/5] irqchip: Add RZ/G2L IA55 Interrupt Controller driver

Hi Marc,

On Thu, May 12, 2022 at 9:23 AM Marc Zyngier <maz@...nel.org> wrote:
> On Wed, 11 May 2022 19:32:07 +0100,
> Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com> wrote:
> >
> > Add a driver for the Renesas RZ/G2L Interrupt Controller.
> >
> > This supports external pins being used as interrupts. It supports
> > one line for NMI, 8 external pins and 32 GPIO pins (out of 123)
> > to be used as IRQ lines.
> >
> > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>

> > +static int rzg2l_irqc_init(struct device_node *node, struct device_node *parent)
> > +{
> > +     struct irq_domain *irq_domain, *parent_domain;
> > +     struct reset_control *resetn;
> > +     struct rzg2l_irqc_priv *priv;
> > +     struct clk *clk;
> > +     struct clk *pclk;
> > +     int ret;
> > +
> > +     priv = kzalloc(sizeof(*priv), GFP_KERNEL);
> > +     if (!priv)
> > +             return -ENOMEM;
>
> Since you are implementing this as a platform driver, consider
> converting this to the devm_* helpers (you can obtain the device
> structure via of_find_device_by_node()).

So that's the missing piece.
Still, it would be more efficient to just pass the pointer, as
platform_irqchip_probe() already has the pointer.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds