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Date:   Fri, 18 Sep 2020 03:58:40 +0300
From:   Sergej Bauer <>
To:     Florian Fainelli <>
Cc:     "David S. Miller" <>,
        Andrew Lunn <>, Jakub Kicinski <>,
        Bryan Whitehead <>,
        Microchip Linux Driver Support <>,
        Mauro Carvalho Chehab <>,
        Rob Herring <>,,
Subject: Re: [PATCH] add virtual PHY for PHY-less devices

Hi Florian

  The fixed-PHY driver looks a little bit hardly tunable, please look at
  This is not my idea. This is a request of HW team, and I thnk it will be
useful for someone else. But I'll try to combine fixed-phy with virtual-PHY
tomorrow. It just to rearrange some lines in lan743x_phy_open.


On Friday, September 18, 2020 1:16:30 AM MSK Florian Fainelli wrote:
> On 9/17/2020 2:40 PM, Sergej Bauer wrote:
> > From:
> > 
> >      Here is a kernel related part of my work which was helps to develop
> >      brand
> > 
> > new PHY device.
> > 
> >      It is migth be helpful for developers work with PHY-less lan743x
> > 
> > (7431:0011 in my case). It's just a fake virtual PHY which can change
> > speed of network card processing as a loopback device. Baud rate can be
> > tuned with ethtool from command line or by means of SIOCSMIIREG ioctl.
> > Duplex mode not configurable and it's allways DUPLEX_FULL.
> > 
> >      It also provides module parameter mii_regs for setting initial values
> >      of
> > 
> > IEEE 802.3 Control Register.
> You appear to have re-implemented the fixed PHY driver, please use that
> instead of rolling your own.

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