linux-kernel - Re: [PATCH 0/8] R-Car M3-N: Enable EtherAVB device node

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Message-ID: <20180227082838.GA23738@w540>
Date:   Tue, 27 Feb 2018 09:28:38 +0100
From:   jacopo mondi <jacopo@...ndi.org>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Jacopo Mondi <jacopo+renesas@...ndi.org>,
        Simon Horman <horms@...ge.net.au>,
        Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
        Magnus Damm <magnus.damm@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        iommu@...ts.linux-foundation.org, netdev <netdev@...r.kernel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/8] R-Car M3-N: Enable EtherAVB device node

Hi Geert,

On Mon, Feb 26, 2018 at 07:28:47PM +0100, Geert Uytterhoeven wrote:
> Hi Jacopo,
>
> On Mon, Feb 26, 2018 at 6:57 PM, Jacopo Mondi <jacopo+renesas@...ndi.org> wrote:
> >   as discussed with you Sergei and Geert, in order to enable EtherAVB for
> > R8A77965 we first wanted to make the phy-mode "rgmii-txid" a board specific
> > property for all other SoCs.
>
> Thanks for your series!
>
> > This series adds  the phy-mode property to salvator-common.dtsi and reset the
> > one for R8A77965/R8A7796/R8A77995 to "rgmii".
>
> I forgot that r8a7795.dtsi and r8a7796.dtsi are used for the ULCB boards, too.
> So to avoid regressions, you need to make a similar change to ulcb.dtsi like you
> made for salvator-common.dtsi.
>
> In addition, r8a77995.dtsi is only used for the Draak board.
> So you have to update r8a7795-draak.dtsi first, too.

Of course! I forgot about ULCB (and had a patch for Draak I lost while
rebasing :/ )
>
> > Then, in order to enable EtherAVB for R-Car M3-N, iommu nodes had to be added
> > as they are referenced by the "avb" device node (CC the iommu list for the
> > series for that reason).
>
> I don't think we need the iommu properties and nodes at this early stage.
> Ethernet works fine without them. Simon, do you agree?

I'll wait for Simon reply and then resend, possibly without iommu and
ULCB and Draak patches!

Thanks
   j

>
> P.S. scripts/dtc/dtx_diff is a great tool to compare DTBs before and after your
>       changes. It would have revealed the changes for ULCB and Draak.
>
> 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