netdev - Re: [PATCH] add virtual PHY for PHY-less devices

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Message-ID: <2016817.gfEZhycloL@metabook>
Date:   Fri, 18 Sep 2020 03:58:40 +0300
From:   Sergej Bauer <sbauer@...ckbox.su>
To:     Florian Fainelli <f.fainelli@...il.com>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Andrew Lunn <andrew@...n.ch>, Jakub Kicinski <kuba@...nel.org>,
        Bryan Whitehead <bryan.whitehead@...rochip.com>,
        Microchip Linux Driver Support <UNGLinuxDriver@...rochip.com>,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        Rob Herring <robh@...nel.org>, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org
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
https://www.lkml.org/lkml/2020/9/17/1424
  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.

-- 
                                                Sergej

On Friday, September 18, 2020 1:16:30 AM MSK Florian Fainelli wrote:
> On 9/17/2020 2:40 PM, Sergej Bauer wrote:
> > From: sbauer@...ckbox.su
> > 
> >      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.