linux-kernel - Re: [PATCH net-next 14/15] net: dsa: mt7530: introduce driver for MT7988 built-in switch

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Date:   Sat, 1 Apr 2023 05:05:51 -0300
From:   Luiz Angelo Daros de Luca <luizluca@...il.com>
To:     Arınç ÜNAL <arinc.unal@...nc9.com>
Cc:     Daniel Golle <daniel@...rotopia.org>, netdev@...r.kernel.org,
        linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux@...linux.org.uk,
        linux-kernel@...r.kernel.org, Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Sean Wang <sean.wang@...iatek.com>,
        Landen Chao <Landen.Chao@...iatek.com>,
        DENG Qingfang <dqfext@...il.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Sam Shih <Sam.Shih@...iatek.com>,
        Lorenzo Bianconi <lorenzo@...nel.org>,
        John Crispin <john@...ozen.org>, Felix Fietkau <nbd@....name>
Subject: Re: [PATCH net-next 14/15] net: dsa: mt7530: introduce driver for
 MT7988 built-in switch

> >> The mmio driver could be useful in the future for the MT7530 on the MT7620
> >> SoCs or generally new hardware that would use MMIO to be controlled.
> >>
> >
> > Sure, it would be a bit confusing once we add support for MT7620A/N (if
> > that ever happens...), then CONFIG_NET_DSA_MT7988 would need to be
> > selected to support this ancient MIPS SoC...
> >
> > If you are planning to work on support for MT7620A/N feel free to suggest
> > a better way to name the Kconfig symbols.
>
> I don't plan to but Luiz may. Onto my suggestions.

I did start a branch to bring mt7620 ethernet+dsa upstream, but since
I burned my test device's serial port, my mt7620 and rtl8367s dev days
are over. After me, I wouldn't bet someone else will invest the
required amount of time that mt7620 needs just to support an outdated
SoC. Its internal MT7530 still only supports FastEthernet, so to have
GbE, you need to add a second switch connected to its single Gigabit
RGMII port. If you need GbE, you can just use an mt7621.

Regards,

Luiz