linux-kernel - Re: [PATCH RFC 3/5] arm64: dts: renesas: r9a07g043[u]: Add IRQC node

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Date:   Thu, 17 Nov 2022 12:30:54 +0000
From:   "Lad, Prabhakar" <prabhakar.csengg@...il.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <maz@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Magnus Damm <magnus.damm@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-gpio@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Biju Das <biju.das.jz@...renesas.com>,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: Re: [PATCH RFC 3/5] arm64: dts: renesas: r9a07g043[u]: Add IRQC node

Hi Geert,

Thank you for the review.

On Thu, Nov 17, 2022 at 11:13 AM Geert Uytterhoeven
<geert@...ux-m68k.org> wrote:
>
> Hi Prabhakar,
>
> On Mon, Nov 7, 2022 at 6:53 PM Prabhakar <prabhakar.csengg@...il.com> wrote:
> > From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> >
> > Add IRQC node to R9A07G043 (RZ/G2UL) SoC DTSI.
> >
> > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
>
> Thanks for your patch!
>
> > ---
> > Note,
> > - clocks and resets are differnt when compared to RZ/Five hence its added
> >   in r9a07g043u.dtsi
> > - We have additional interrupt on RZ/Five hence interrupts are added in
> >   r9a07g043u.dtsi
>
> Which additional interrupts?
> Do you already have the r9a06g043f-variant ready, so we can compare?
>
I missed this RZ/G2UL has this interrupt too. So ignore this point.

> > - clock-names is also added in r9a07g043u.dtsi to avoid dtbs_check warning
>
> Why does this warn?
>
If we add the clock-names property in the base dtsi we get a
dtbs_check warning "clocks is a dependency of clock-names" for RZ/Five
as we haven't added the clocks property to it.

> > --- a/arch/arm64/boot/dts/renesas/r9a07g043.dtsi
> > +++ b/arch/arm64/boot/dts/renesas/r9a07g043.dtsi
> > @@ -538,6 +538,14 @@ pinctrl: pinctrl@...30000 {
> >                                  <&cpg R9A07G043_GPIO_SPARE_RESETN>;
> >                 };
> >
> > +               irqc: interrupt-controller@...a0000 {
> > +                       #interrupt-cells = <2>;
> > +                       #address-cells = <0>;
> > +                       interrupt-controller;
> > +                       reg = <0 0x110a0000 0 0x10000>;
>
> The size of the "reg" property will be 0x20000 on RZ/Five, to cover the
> extra [NIT]MSK registers, so I think this belongs in r9a07g043u.dtsi, too.
>
Agreed.

Cheers,
Prabhakar