linux-kernel - Re: [PATCH v3 2/3] dt-bindings: interrupt-controller: renesas,rzg2l-irqc: Update description for '#interrupt-cells' property

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Date:   Fri, 8 Sep 2023 11:31:35 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Marc Zyngier <maz@...nel.org>
Cc:     Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Magnus Damm <magnus.damm@...il.com>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Prabhakar <prabhakar.csengg@...il.com>,
        Biju Das <biju.das.jz@...renesas.com>
Subject: Re: [PATCH v3 2/3] dt-bindings: interrupt-controller:
 renesas,rzg2l-irqc: Update description for '#interrupt-cells' property

Hi Marc,

On Thu, Aug 11, 2022 at 4:50 PM Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
> On Sun, Jul 24, 2022 at 1:01 PM Marc Zyngier <maz@...nel.org> wrote:
> > On Fri, 22 Jul 2022 16:11:54 +0100,
> > Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com> wrote:
> > >
> > > Update description for '#interrupt-cells' property to utilize the
> > > RZG2L_{NMI,IRQX} for the first cell defined in the
> > > include/dt-bindings/interrupt-controller/irqc-rzg2l.h file.
> > >
> > > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> > > ---
> > > v3:
> > > * New patch
>
> > > --- a/Documentation/devicetree/bindings/interrupt-controller/renesas,rzg2l-irqc.yaml
> > > +++ b/Documentation/devicetree/bindings/interrupt-controller/renesas,rzg2l-irqc.yaml
> > > @@ -31,8 +31,9 @@ properties:
> > >        - const: renesas,rzg2l-irqc
> > >
> > >    '#interrupt-cells':
> > > -    description: The first cell should contain external interrupt number (IRQ0-7) and the
> > > -                 second cell is used to specify the flag.
> > > +    description: The first cell should contain a macro RZG2L_{NMI,IRQX} included in the
> > > +                 include/dt-bindings/interrupt-controller/irqc-rzg2l.h and the second
> > > +                 cell is used to specify the flag.
> >
> > I think a binding should be self describing, and not rely on an opaque
> > macro. Mentioning that there is a macro that encodes it is fine, but
> > the values are what matter, specially when considering that other OSs
> > could (and should be able to) write their own DTs from scratch without
> > depending on something that is very much Linux-specific.
>
> The macros are not Linux-specific, and are part of the bindings.
> But the only hard dependency on <dt-bindings/interrupt-controller/irqc-rzg2l.h>
> is the DT source file describing the board.
>
> Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>

Looks like this fell through the cracks?
The two other patches from this series were applied in v6.1.

Note that the current DT bindings are incorrect, as they do not take into
account that the value of zero is used to represent the NMI.

Fixes: 96fed779d3d4cb3c ("dt-bindings: interrupt-controller: Add
Renesas RZ/G2L Interrupt Controller")

Should we resend instead?
Thanks!

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