linux-kernel - Re: [PATCH 10/14] arm64: renesas: r9a08g045: Add Ethernet nodes

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Message-ID: <b3701927-e41a-44d8-8f91-da245b76f532@tuxon.dev>
Date:   Mon, 4 Dec 2023 10:38:20 +0200
From:   claudiu beznea <claudiu.beznea@...on.dev>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     s.shtylyov@....ru, davem@...emloft.net, edumazet@...gle.com,
        kuba@...nel.org, pabeni@...hat.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        linux@...linux.org.uk, magnus.damm@...il.com,
        mturquette@...libre.com, sboyd@...nel.org,
        linus.walleij@...aro.org, p.zabel@...gutronix.de, arnd@...db.de,
        m.szyprowski@...sung.com, alexandre.torgue@...s.st.com, afd@...com,
        broonie@...nel.org, alexander.stein@...tq-group.com,
        eugen.hristev@...labora.com, sergei.shtylyov@...il.com,
        prabhakar.mahadev-lad.rj@...renesas.com,
        biju.das.jz@...renesas.com, linux-renesas-soc@...r.kernel.org,
        netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-clk@...r.kernel.org, linux-gpio@...r.kernel.org,
        Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
Subject: Re: [PATCH 10/14] arm64: renesas: r9a08g045: Add Ethernet nodes



On 04.12.2023 10:02, Geert Uytterhoeven wrote:
> Hi Claudiu,
> 
> On Mon, Dec 4, 2023 at 8:41 AM claudiu beznea <claudiu.beznea@...on.dev> wrote:
>> On 01.12.2023 19:35, Geert Uytterhoeven wrote:
>>> On Mon, Nov 20, 2023 at 8:01 AM Claudiu <claudiu.beznea@...on.dev> wrote:
>>>> From: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
>>>>
>>>> Add Ethernet nodes available on RZ/G3S (R9A08G045).
>>>>
>>>> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
>>>
>>> Thanks for your patch!
>>>
>>>> --- a/arch/arm64/boot/dts/renesas/r9a08g045.dtsi
>>>> +++ b/arch/arm64/boot/dts/renesas/r9a08g045.dtsi
>>>> @@ -149,6 +149,38 @@ sdhi2: mmc@...20000 {
>>>>                         status = "disabled";
>>>>                 };
>>>>
>>>> +               eth0: ethernet@...30000 {
>>>> +                       compatible = "renesas,r9a08g045-gbeth", "renesas,rzg2l-gbeth";
>>>> +                       reg = <0 0x11c30000 0 0x10000>;
>>>> +                       interrupts = <GIC_SPI 68 IRQ_TYPE_LEVEL_HIGH>,
>>>> +                                    <GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH>,
>>>> +                                    <GIC_SPI 70 IRQ_TYPE_LEVEL_HIGH>;
>>>> +                       interrupt-names = "mux", "fil", "arp_ns";
>>>> +                       clocks = <&cpg CPG_MOD R9A08G045_ETH0_CLK_AXI>,
>>>> +                                <&cpg CPG_MOD R9A08G045_ETH0_CLK_CHI>,
>>>> +                                <&cpg CPG_MOD R9A08G045_ETH0_REFCLK>;
>>>> +                       clock-names = "axi", "chi", "refclk";
>>>> +                       resets = <&cpg R9A08G045_ETH0_RST_HW_N>;
>>>> +                       power-domains = <&cpg>;
>>>
>>> Perhaps add a default phy mode, like on other SoCs?
>>>
>>>     phy-mode = "rgmii"';
>>
>> I skipped this (even it was available on the other SoCs) as I consider the
>> phy-mode is board specific.
> 
> IC.  Still, it's good to have some consistency across boards.
> 
>>> Also missing:
>>>
>>>     #address-cells = <1>;
>>>     #size-cells = <0>;
>>
>> Same for these.
> 
> These are required, and always have the same values, so it makes more
> sense to have them in the SoC .dtsi file, once.

I remember I had a compilation warning with an Ethernet controller
configured with fixed-link having #address-cells, #size-cells. With
fixed-link these were not needed.

Anyway... I'll keep all in dtsi if you prefer it this way.

Thank you,
Claudiu Beznea

> 
> Gr{oetje,eeting}s,
> 
>                         Geert
>