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Date: Sun, 29 Jan 2012 11:00:22 -0800
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From: Adrian Chadd <adrian@freebsd.org>
To: Marius Strobl <marius@alchemy.franken.de>
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Cc: FreeBSD Net <freebsd-net@freebsd.org>, Aleksandr Rybalko <ray@ddteam.net>,
	Stefan Bethke <stb@lassitu.de>, FreeBSD-arch <freebsd-arch@freebsd.org>
Subject: Re: Ethernet Switch Framework
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I think for switches, that doesn't necessarily hold.

ie, mii_attach() for single-PHY devices may work that way, but the weird
and wonderful world of embedded switch SoC's doesn't. You're lucky in most
instances since the bootloader does give you a mostly-working switch
config. But I doubt that's a guarantee on all platforms.

So for those (ethernet) devices, splitting out the mii/mdio stuff and _not_
necessarily presenting a working PHY may be acceptable. For now it's going
to be a subset, to having it export an MDIO bus and doing late MII
attachment may not be as architecturally "no-no" as I interpret your post.


Adrian