linux-kernel - Re: [PATCH v2 2/2] ARM: dts: r9a06g032: add r9a06g032-rzn1d400-eb board device-tree

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Message-ID: <CAMuHMdVhGFyrWx6oD-K9WhZRtYT_xJ_kWRA+vhdvB_JubFk8YA@mail.gmail.com>
Date:   Wed, 15 Feb 2023 12:31:52 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Clément Léger <clement.leger@...tlin.com>
Cc:     Magnus Damm <magnus.damm@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Herve Codina <herve.codina@...tlin.com>,
        Miquèl Raynal <miquel.raynal@...tlin.com>,
        Milan Stevanovic <milan.stevanovic@...com>,
        Jimmy Lalande <jimmy.lalande@...com>,
        Pascal Eberhard <pascal.eberhard@...com>,
        linux-renesas-soc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Gareth Williams <gareth.williams.jx@...esas.com>
Subject: Re: [PATCH v2 2/2] ARM: dts: r9a06g032: add r9a06g032-rzn1d400-eb
 board device-tree

Hi Clément,

On Wed, Feb 15, 2023 at 11:52 AM Clément Léger
<clement.leger@...tlin.com> wrote:
> Le Wed, 15 Feb 2023 09:29:33 +0100,
> Clément Léger <clement.leger@...tlin.com> a écrit :
> > Le Tue, 14 Feb 2023 17:25:14 +0100,
> > Geert Uytterhoeven <geert@...ux-m68k.org> a écrit :
> > > On Thu, Feb 9, 2023 at 2:32 PM Clément Léger <clement.leger@...tlin.com> wrote:
> > > > The EB board (Expansion board) supports both RZ/N1D and RZ-N1S. Since this
> > > > configuration targets only the RZ/N1D, it is named r9a06g032-rzn1d400-eb.
> > > > It adds support for the 2 additional switch ports (port C and D) that are
> > > > available on that board.
> > > >
> > > > Signed-off-by: Clément Léger <clement.leger@...tlin.com>
> > >
> > > Thanks for your patch!
> > >
> > > > --- /dev/null
> > > > +++ b/arch/arm/boot/dts/r9a06g032-rzn1d400-eb.dts

> > > > +       pinctrl-0 = <&pins_eth1>, <&pins_eth2>, <&pins_eth3>, <&pins_eth4>,
> > > > +                   <&pins_mdio1>;
> > > > +
> > > > +       mdio {
> > > > +               /* CN15 and CN16 switches must be configured in MDIO2 mode */
> > > > +               switch0phy1: ethernet-phy@1 {
> > > > +                       reg = <1>;
> > > > +                       marvell,reg-init = <3 16 0 0x1010>;
> > >
> > > marvell,reg-init is not documented in any DT bindings document?
> >
> > Indeed, this is not somethiong that should be made available here. It's
> > only inverting the LED polarity but supported by some internal patch.
> > I'll remove that.

> I actually was confused by a property I added in another device-tree but
> marvell,reg-init exists, is handled by the marvell phy driver and used
> in a few device-trees. Strangely, it is not documented anywhere. So I
> can either remove that (and the LED won't work properly) or let it live
> depending on what you prefer.

In that case, please keep it.
But the property really should be documented, one day...

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