linux-kernel - Re: [PATCH 08/18] arm64: dts: renesas: beacon: Enable SCIF4

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Date:   Thu, 17 Dec 2020 12:20:05 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Adam Ford <aford173@...il.com>
Cc:     Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        Adam Ford-BE <aford@...conembedded.com>,
        Magnus Damm <magnus.damm@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 08/18] arm64: dts: renesas: beacon: Enable SCIF4

Hi Adam,

On Sun, Dec 13, 2020 at 7:38 PM Adam Ford <aford173@...il.com> wrote:
> The baseboard supports SCIF4, enable the pins and the node for it.
>
> Signed-off-by: Adam Ford <aford173@...il.com>

Thanks for your patch!

> --- a/arch/arm64/boot/dts/renesas/beacon-renesom-baseboard.dtsi
> +++ b/arch/arm64/boot/dts/renesas/beacon-renesom-baseboard.dtsi
> @@ -578,6 +578,11 @@ pwm2_pins: pwm2 {
>                 function = "pwm2";
>         };
>
> +       scif4_pins: scif4 {
> +               groups = "scif4_data_c";
> +               function = "scif4";
> +       };
> +
>         sdhi0_pins: sd0 {
>                 groups = "sdhi0_data4", "sdhi0_ctrl";
>                 function = "sdhi0";
> @@ -706,6 +711,12 @@ &scif0 {
>         status = "okay";
>  };
>
> +&scif4 {
> +       pinctrl-0 = <&scif4_pins>;
> +       pinctrl-names = "default";
> +       status = "okay";
> +};
> +
>  &scif5 {
>         pinctrl-0 = <&scif5_pins>;
>         pinctrl-names = "default";

As mixing SCIF ports with and without aliases may lead to failures,
depending on probe order, you want to add an aliases for scif4 to
arch/arm64/boot/dts/renesas/r8a774a1-beacon-rzg2m-kit.dts.
I see you did that for the rzg2h and rzg2n kits, but rzh2m lacks it.

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