linux-kernel - Re: Similar SoCs with different CPUs and interrupt bindings

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Message-ID: <CAMuHMdXaWz4zP-Zrc4drxwVmbMjmGZHABVbUtO91fZXKawathw@mail.gmail.com>
Date:   Wed, 21 Sep 2022 12:08:11 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     "Lad, Prabhakar" <prabhakar.csengg@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Andre Przywara <andre.przywara@....com>,
        Conor Dooley <conor.dooley@...rochip.com>,
        Samuel Holland <samuel@...lland.org>,
        Biju Das <biju.das.jz@...renesas.com>,
        Chris Paterson <Chris.Paterson2@...esas.com>,
        Atish Patra <atishp@...shpatra.org>,
        "Lad, Prabhakar" <prabhakar.mahadev-lad.rj@...renesas.com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        linux-riscv <linux-riscv@...ts.infradead.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Arnd Bergmann <arnd@...db.de>, Olof Johansson <olof@...om.net>
Subject: Re: Similar SoCs with different CPUs and interrupt bindings

Hi Krzysztof,

On Wed, Sep 21, 2022 at 11:26 AM Krzysztof Kozlowski
<krzysztof.kozlowski@...aro.org> wrote:
> On 21/09/2022 11:20, Lad, Prabhakar wrote:
> >> What do you mean? Macros support string concatenation and simple
> >> arithmetic like adding numbers. I just tested it.
> >>
> > I did try the below:
> >
> > diff --git a/arch/arm64/boot/dts/renesas/r9a07g043.dtsi
> > b/arch/arm64/boot/dts/renesas/r9a07g043.dtsi
> > index 689aa4ba416b..0f923c276cd3 100644
> > --- a/arch/arm64/boot/dts/renesas/r9a07g043.dtsi
> > +++ b/arch/arm64/boot/dts/renesas/r9a07g043.dtsi
> > @@ -8,6 +8,8 @@
> >  #include <dt-bindings/interrupt-controller/arm-gic.h>
> >  #include <dt-bindings/clock/r9a07g043-cpg.h>
> >
> > +#define SOC_PERIPHERAL_IRQ(nr, na) GIC_SPI nr na
> > +
> >  / {
> >      compatible = "renesas,r9a07g043";
> >      #address-cells = <2>;
> > @@ -128,7 +130,7 @@ ssi1: ssi@...4a000 {
> >              compatible = "renesas,r9a07g043-ssi",
> >                       "renesas,rz-ssi";
> >              reg = <0 0x1004a000 0 0x400>;
> > -            interrupts = <GIC_SPI 330 IRQ_TYPE_LEVEL_HIGH>,
> > +            interrupts = <SOC_PERIPHERAL_IRQ(330, IRQ_TYPE_LEVEL_HIGH)>,
> >                       <GIC_SPI 331 IRQ_TYPE_EDGE_RISING>,
> >                       <GIC_SPI 332 IRQ_TYPE_EDGE_RISING>,
> >                       <GIC_SPI 333 IRQ_TYPE_EDGE_RISING>;
> >
> > This worked as expected, but couldn't get the arithmetic operation
> > working. Could you please provide an example?
>
> diff --git a/arch/arm64/boot/dts/renesas/r9a07g043.dtsi b/arch/arm64/boot/dts/renesas/r9a07g043.dtsi
> index ff6aab388eb7..0ecca775fa3f 100644
> --- a/arch/arm64/boot/dts/renesas/r9a07g043.dtsi
> +++ b/arch/arm64/boot/dts/renesas/r9a07g043.dtsi
> @@ -8,6 +8,8 @@
>  #include <dt-bindings/interrupt-controller/arm-gic.h>
>  #include <dt-bindings/clock/r9a07g043-cpg.h>
>
> +#define SOC_PERIPHERAL_IRQ_NUMBER(na)  (na + 32)
> +#define SOC_PERIPHERAL_IRQ(nr, na) GIC_SPI nr SOC_PERIPHERAL_IRQ_NUMBER(na)

#define SOC_PERIPHERAL_IRQ(nr, flags) GIC_SPI
SOC_PERIPHERAL_IRQ_NUMBER(nr) flags

>  / {
>         compatible = "renesas,r9a07g043";
>         #address-cells = <2>;
> @@ -128,7 +130,7 @@ ssi1: ssi@...4a000 {
>                         compatible = "renesas,r9a07g043-ssi",
>                                      "renesas,rz-ssi";
>                         reg = <0 0x1004a000 0 0x400>;
> -                       interrupts = <GIC_SPI 330 IRQ_TYPE_LEVEL_HIGH>,
> +                       interrupts = <SOC_PERIPHERAL_IRQ(330, IRQ_TYPE_LEVEL_HIGH)>,
>
>
>
> Or any other method like that....

Oh cool, seems like arithmetic is supported.
No idea what I did wrong last time I tried...

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