Re: [PATCH v3 net-next 05/10] net: dsa: microchip: add DSA support for microchip lan937x

On Wed, Aug 11, 2021 at 09:14:14PM +0100, Russell King (Oracle) wrote:

On Wed, Aug 11, 2021 at 08:23:04PM +0200, Andrew Lunn wrote:

quoted

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I hope that using "*-internal-delay-ps" for Mac would be the right option.
Shall i include these changes as we discussed in next revision of the patch? 

Yes, that seems sensible. But please limit them to the CPU port. Maybe
return -EINVAL for other ports.

Hmm. Don't we want ports that are "MAC like" to behave "MAC like" ?
In other words, shouldn't a DSA port that can be connected to an
external PHY should accept the same properties as a conventional
Ethernet MAC e.g. in a SoC device?

+1, I thought the whole purpose of the discussion was to stop singling
out the CPU port as being special in any way w.r.t. RGMII delays.