netdev - Supporting C45 PHY without ID registers

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Message-ID: <CAAtXAHdfL07C+p-FcafHL5s0Noqh4Br1VP6dcyBr89wWidvsJQ@mail.gmail.com>
Date:	Mon, 27 Jun 2016 16:36:20 -0700
From:	Moritz Fischer <moritz.fischer@...us.com>
To:	netdev@...r.kernel.org
Subject: Supporting C45 PHY without ID registers

Hi all,

I have a 10GigE PHY that I'm working with that has most of it's
functionality availabile via MDIO
in a clause 45 compliant fashion, however the usual probe method fails
since the id registers
are not implemented.

I hacked up drivers/of/of_mdio.c to include something similar to of_get_phy_id()
for c45 phys but I was wondering if someone else has a better idea
than this in my dt:

ethernet_phy1: ethernet-phy@4 {
    compatible = "ethernet-phy-id0000.0000",
                        "ethernet-phy-id4242.4242",
                        "ethernet-phy-id0000.0000",
                        "ethernet-phy-id4343.4343",
                        "ethernet-phy-ieee802.3-c45";
    reg = <4>;
};

Where I made up 42424242 and 43434343 as ids for my PCS / PMA. Ideas?

Cheers,

Moritz