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From:   Geert Uytterhoeven <geert@linux-m68k.org>
Date:   Mon, 4 Jan 2021 11:51:31 +0100
Message-ID: <CAMuHMdX2ruikh4voRrHPmi=ti+eHVxXh6N05s1XH6+r5MeeqQw@mail.gmail.com>
Subject: Re: [PATCH] can: rcar: Update help description for CAN_RCAR_CANFD config
To:     Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Cc:     Wolfgang Grandegger <wg@grandegger.com>,
        Marc Kleine-Budde <mkl@pengutronix.de>,
        "David S. Miller" <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>,
        Masahiro Yamada <masahiroy@kernel.org>,
        linux-can@vger.kernel.org, netdev <netdev@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux-Renesas <linux-renesas-soc@vger.kernel.org>,
        Prabhakar <prabhakar.csengg@gmail.com>
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Hi Prabhakar,

On Thu, Dec 31, 2020 at 5:00 PM Lad Prabhakar
<prabhakar.mahadev-lad.rj@bp.renesas.com> wrote:
> The rcar_canfd driver supports R-Car Gen3 and RZ/G2 SoC's, update the
> description to reflect this.
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>

> --- a/drivers/net/can/rcar/Kconfig
> +++ b/drivers/net/can/rcar/Kconfig
> @@ -10,13 +10,13 @@ config CAN_RCAR
>           be called rcar_can.
>
>  config CAN_RCAR_CANFD
> -       tristate "Renesas R-Car CAN FD controller"
> +       tristate "Renesas R-Car Gen3 and RZ/G2 CAN FD controller"
>         depends on ARCH_RENESAS || ARM

Not introduced by this patch, but the "|| ARM" looks strange to me.
Is this meant for compile-testing? Doesn't the driver compile on all
platforms (it does on m68k), so "|| COMPILE_TEST" is not appropriate?
Is the CAN FD controller present on some Renesas arm32 SoCs (but
not yet supported by this driver)?

>         help
>           Say Y here if you want to use CAN FD controller found on
> -         Renesas R-Car SoCs. The driver puts the controller in CAN FD only
> -         mode, which can interoperate with CAN2.0 nodes but does not support
> -         dedicated CAN 2.0 mode.
> +         Renesas R-Car Gen3 and RZ/G2 SoCs. The driver puts the
> +         controller in CAN FD only mode, which can interoperate with
> +         CAN2.0 nodes but does not support dedicated CAN 2.0 mode.
>
>           To compile this driver as a module, choose M here: the module will
>           be called rcar_canfd.

Gr{oetje,eeting}s,

                        Geert


--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-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