linux-kernel - Re: [RFC RESEND PATCH 1/2] arm64: dts: renesas: r9a07g043: Introduce SOC_PERIPHERAL_IRQ() macro to specify interrupt property

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Date:   Tue, 25 Oct 2022 14:28:34 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Prabhakar <prabhakar.csengg@...il.com>
Cc:     Magnus Damm <magnus.damm@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Arnd Bergmann <arnd@...db.de>, Olof Johansson <olof@...om.net>,
        soc@...nel.org, linux-arm-kernel@...ts.infradead.org,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        linux-riscv@...ts.infradead.org,
        Conor Dooley <conor.dooley@...rochip.com>,
        Samuel Holland <samuel@...lland.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: [RFC RESEND PATCH 1/2] arm64: dts: renesas: r9a07g043: Introduce
 SOC_PERIPHERAL_IRQ() macro to specify interrupt property

Hi Prabhakar,

On Mon, Oct 17, 2022 at 11:12 AM Prabhakar <prabhakar.csengg@...il.com> wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
>
> Introduce SOC_PERIPHERAL_IRQ() macro to specify interrupt property so
> that we can share the common parts of the SoC DTSI with the RZ/Five
> (RISC-V) SoC and the RZ/G2UL (ARM64) SoC.
>
> This patch adds a new file r9a07g043u.dtsi to separate out RZ/G2UL
> (ARM64) SoC specific parts. No functional changes (same DTB).
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>

Thanks for your patch!

> --- /dev/null
> +++ b/arch/arm64/boot/dts/renesas/r9a07g043u.dtsi
> @@ -0,0 +1,12 @@
> +// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +/*
> + * Device Tree Source for the RZ/G2UL SoC
> + *
> + * Copyright (C) 2022 Renesas Electronics Corp.
> + */
> +
> +#include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> +#define SOC_PERIPHERAL_IRQ(nr, na)     GIC_SPI nr na

s/na/flags/

Originally, when I assumed incorrectly that dtc does not support
arithmetic, I used "nr" and "na" in the macro I proposed to mean RISC-V
("r") resp. ARM ("a") interrupt number.  Apparently the names stuck,
although the second parameter now has a completely different meaning ;-)

However, as the NCEPLIC does support interrupt flags, unlike the SiFive
PLIC, there is no need to have the flags parameter in the macro.

> +
> +#include "r9a07g043.dtsi"

The rest LGTM.

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