linux-kernel - Re: [PATCH 17/18] arm64: dts: renesas: Introduce r8a774b1-beacon-rzg2n-kit

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Date:   Tue, 22 Dec 2020 07:58:33 -0600
From:   Adam Ford <aford173@...il.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
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 17/18] arm64: dts: renesas: Introduce r8a774b1-beacon-rzg2n-kit

On Thu, Dec 17, 2020 at 5:49 AM Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
>
> Hi Adam,
>
> On Sun, Dec 13, 2020 at 7:38 PM Adam Ford <aford173@...il.com> wrote:
> > Beacon EmebeddedWorks is introducing a new kit based on the
> > RZ/G2N SoC from Renesas.
> >
> > The SOM supports eMMC, WiFi and Bluetooth, along with a Cat-M1
> > cellular radio.
> >
> > The Baseboard has Ethernet, USB, HDMI, stereo audio in and out,
> > along with a variety of push buttons and LED's, and support for
> > a parallel RGB and an LVDS display.  It uses the same baseboard
> > and SOM as the RZ/G2M.
> >
> > Signed-off-by: Adam Ford <aford173@...il.com>
>
> Thanks for your patch!

Thank you for the review!

>
> > --- /dev/null
> > +++ b/arch/arm64/boot/dts/renesas/r8a774b1-beacon-rzg2n-kit.dts
> > @@ -0,0 +1,43 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * Copyright 2020, Compass Electronics Group, LLC
> > + */
> > +
> > +/dts-v1/;
> > +
> > +#include "r8a774b1.dtsi"
> > +#include "beacon-renesom-som.dtsi"
> > +#include "beacon-renesom-baseboard.dtsi"
> > +
> > +/ {
> > +       model = "Beacon Embedded Works RZ/G2N Development Kit";
> > +       compatible =    "beacon,beacon-rzg2n", "renesas,r8a774b1";
> > +
> > +       aliases {
> > +               serial0 = &scif2;
> > +               serial1 = &hscif0;
> > +               serial2 = &hscif1;
> > +               serial3 = &scif0;
> > +               serial4 = &hscif2;
> > +               serial5 = &scif5;
> > +               serial6 = &scif4;
> > +               ethernet0 = &avb;
> > +       };
> > +
> > +       chosen {
> > +               stdout-path = "serial0:115200n8";
> > +       };
>
> No memory nodes? Are you relying on U-Boot to fill them in?
> If yes, why do you have them in the other board DTS files?

There is already a memory node included in the beacon-renesom.dtsi
file which is defining memory@...00000 node which is common to the M,
N and H.   If I understand it correctly, the extra memory nodes
defined in the higher-level dts for M and H variation are not
applicable on the N.

>
> > +};
> > +
> > +&du {
> > +       status = "okay";
>
> Missing pinctrl properties?
>
oops.  I'll fix.
> > +
> > +       clocks = <&cpg CPG_MOD 724>,
> > +               <&cpg CPG_MOD 723>,
> > +               <&cpg CPG_MOD 721>,
> > +               <&versaclock5 1>,
> > +               <&x302_clk>,
> > +               <&versaclock5 2>;
> > +       clock-names = "du.0", "du.1", "du.3",
> > +               "dclkin.0", "dclkin.1", "dclkin.3";
> > +};
>
> 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