netdev - Re: [PATCH 2/2] net: mdio: support c45 peripherals on c22 busses

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Date:   Sun, 4 Apr 2021 20:25:39 +0200
From:   Danilo Krummrich <danilokrummrich@...develop.de>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Russell King - ARM Linux admin <linux@...linux.org.uk>,
        davem@...emloft.net, hkallweit1@...il.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, jeremy.linton@....com
Subject: Re: [PATCH 2/2] net: mdio: support c45 peripherals on c22 busses

On Fri, Apr 02, 2021 at 02:28:54PM +0200, Andrew Lunn wrote:
> > > Do you actually have a requirement for this?
> > >
> > Yes, the Marvell 88Q2112 1000Base-T1 PHY. But actually, I just recognize that it
> > should be possible to just register it with the compatible string
> > "ethernet-phy-ieee802.3-c22" instead of "ethernet-phy-ieee802.3-c45", this
> > should result in probing it as c22 PHY and doing indirect accesses through
> > phy_*_mmd().
> 
> Hi Danilo
> 
> Do you plan to submit a driver for this?
> 
Hi Andrew,

Yes, I'll get it ready once I got some spare time.
> Does this device have an ID in register 2 and 3 in C22 space?
> 
Currently, I don't have access to the datasheet and I don't remember.
In a couple of days I should have access to the HW again and I will try.
>      Andrew
Cheers,
Danilo