netdev - Re: [PATCH 1/9] net: dsa: allow switch drivers to override default slave PHY addresses

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Date:   Tue, 8 Nov 2022 11:34:35 +0100
From:   Lukasz Majewski <lukma@...x.de>
To:     Vladimir Oltean <olteanv@...il.com>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org,
        Matthias Schiffer <matthias.schiffer@...tq-group.com>
Subject: Re: [PATCH 1/9] net: dsa: allow switch drivers to override default
 slave PHY addresses

Hi Vladimir,

> Hi Lukasz,
> 
> On Tue, Nov 08, 2022 at 09:23:22AM +0100, Lukasz Majewski wrote:
> > From: Matthias Schiffer <matthias.schiffer@...tq-group.com>
> > 
> > Avoid having to define a PHY for every physical port when PHY
> > addresses are fixed, but port index != PHY address.
> > 
> > Signed-off-by: Matthias Schiffer <matthias.schiffer@...tq-group.com>
> > Signed-off-by: Lukasz Majewski <lukma@...x.de>
> > [Adjustments for newest kernel upstreaming]  
> 
> (I got reminded by the message)
> How are things going with the imx28 MTIP L2 switch? Upstreaming went
> silent on that.

Yes, this task has been postponed as:

- Customer decided to use Linux 4.19 CIP for which I've forward ported
  the original NXP patches [1][2]

- Considering the above - I would need to change the structure of the
  switch driver (which up till now is based on old - i.e. 2.6.3x - FEC
  driver) and modify the current FEC to add acceleration in similar way
  to TI's driver.

  This is IMHO quite time consuming task ...

  (The attempt to add it as DSA [2] was a bit less intrusive, but is
  conceptually wrong).

Links:
[1] - https://github.com/lmajewski/linux-imx28-l2switch/tree/master

[2] -
https://github.com/lmajewski/linux-imx28-l2switch/tree/imx28-v5.12-L2-upstream-RFC_v1

Best regards,

Lukasz Majewski

--

DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
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Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email: lukma@...x.de

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