linux-kernel - Re: [PATCH resend v4 1/3] dt-bindings: phy: Add lan966x-serdes binding

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Message-ID: <20211130161141.pat3h5sojddr2ne6@soft-dev3-1.localhost>
Date:   Tue, 30 Nov 2021 17:11:41 +0100
From:   Horatiu Vultur <horatiu.vultur@...rochip.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
CC:     Kishon Vijay Abraham I <kishon@...com>, Vinod <vkoul@...nel.org>,
        Rob Herring <robh+dt@...nel.org>, Andrew Lunn <andrew@...n.ch>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Jakub Kicinski <kuba@...nel.org>,
        <linux-phy@...ts.infradead.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Rob Herring <robh@...nel.org>
Subject: Re: [PATCH resend v4 1/3] dt-bindings: phy: Add lan966x-serdes
 binding

The 11/30/2021 15:02, Geert Uytterhoeven wrote:
> 
> Hi Horatio,

Hi Geert,

> 
> On Tue, Nov 16, 2021 at 11:16 AM Horatiu Vultur
> <horatiu.vultur@...rochip.com> wrote:
> > Document the lan966x ethernet serdes phy driver bindings.
> >
> > Reviewed-by: Rob Herring <robh@...nel.org>
> > Signed-off-by: Horatiu Vultur <horatiu.vultur@...rochip.com>
> 
> Thanks for your patch, which is now commit fd66e57e46a3d1b7
> ("dt-bindings: phy: Add lan966x-serdes binding") in phy/next.
> 
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/phy/microchip,lan966x-serdes.yaml
> 
> > +examples:
> > +  - |
> > +    serdes: serdes@...04010 {
> > +      compatible = "microchip,lan966x-serdes";
> > +      reg = <0xe202c000 0x9c>, <0xe2004010 0x4>;
> > +      #phy-cells = <2>;
> > +    };
> 
> So this overlaps with the switch registers, cfr.
> Documentation/devicetree/bindings/net/microchip,lan966x-switch.yaml
> in net-next/master?
> 
>     switch: switch@...00000 {
>       compatible = "microchip,lan966x-switch";
>       reg =  <0xe0000000 0x0100000>,
>              <0xe2000000 0x0800000>;
>       ...
>     };

Well, they will overlap, but the switch will not use the registers used
by the the serdes. The 'lan966x_main_iomap' inside lan966x_main.c will
decide which parts of the resource will be used.

> 
> 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

-- 
/Horatiu