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Date:   Thu, 21 Feb 2019 02:49:38 +0100
From:   Andrew Lunn <>
To:     Paul Kocialkowski <>
Cc:     Florian Fainelli <>,
        Heiner Kallweit <>,,
        Thomas Petazzoni <>,
        Mylène Josserand 
Subject: Re: Handling an Extra Signal at PHY Reset

On Tue, Feb 19, 2019 at 10:14:20AM +0100, Paul Kocialkowski wrote:
> Hi,
> We are dealing with an Ethernet PHY (Marvell 88E1512) that comes with a
> CONFIG pin that must be connected to one of the other pins of the PHY
> to configure the LSB of the PHY address as well as I/O voltages (see
> section 2.18.1 Hardware Configuration of the datasheet). It must be
> connected "soon after reset" for the PHY to be correctly configured.

Hi Paul

Turns out the datasheet is publicly available.

So you can at run-time configure the voltage. Page 2, register 24, bit

So back to my last question. Can you address the PHY without using the
switch? Even if it has the wrong voltage?

If you can, you could set the correct voltage in the probe() function.


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