netdev - Re: mt7530: dsa_switch_parse_of() fails, causes probe code to run twice

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Message-ID: <20230415142014.katsq5axop6gov3i@skbuf>
Date:   Sat, 15 Apr 2023 17:20:14 +0300
From:   Vladimir Oltean <olteanv@...il.com>
To:     Daniel Golle <daniel@...rotopia.org>
Cc:     Arınç ÜNAL <arinc.unal@...nc9.com>,
        Frank Wunderlich <frank-w@...lic-files.de>,
        netdev <netdev@...r.kernel.org>, erkin.bozoglu@...ont.com,
        Thibaut <hacks@...shdirt.org>
Subject: Re: mt7530: dsa_switch_parse_of() fails, causes probe code to run
 twice

On Sat, Apr 15, 2023 at 03:02:10PM +0100, Daniel Golle wrote:
> As the PHYs are accessed over the MDIO bus which is exposed by the mt7530.c
> DSA driver the only middle ground would possibly be to introduce a MFD
> driver taking care of creating the bus access regmap (MDIO vs. MDIO) and
> expose the mt7530-controlled MDIO bus.

Which is something I had already mentioned as a possible way forward in
the other thread. One would need to take care of ensuring a reasonable
migration path in terms of device tree compatibility though.

> 
> Obviously that'd be a bit more work than just moving some things from the
> switch setup function to the probe function...

On the other hand, it would actually work reliably, and would not depend
on whomever wanted to reorder things just a little bit differently for
his system to probe faster.