[PATCH V2 net 1/2] b53: deal with Northstar devices using CPU port 5 or 7

[Vladimir Oltean]

On Tue, Aug 11, 2026 at 09:36:57PM +0200, Rafał Miłecki wrote:
> From: Rafał Miłecki <rafal at milecki.pl>
> 
> Northstar devices have 3 CPU ports. Ports 5 and 7 may be used but have
> their limitations. Warn user when CPU port 8 isn't used and add EAP
> setup workaround to avoid non-functional standalone ports.
> 
> Fixes: 4227ea91e265 ("net: dsa: b53: prevent standalone from trying to forward to other ports")
> Cc: Semih Baskan <strst.gs at gmail.com>
> Signed-off-by: Rafał Miłecki <rafal at milecki.pl>
> Tested-by: Semih Baskan <strst.gs at gmail.com>
> ---
> V2: Print warning on switch setup instead of on actual EAP mode change
> 
> I added PATCH 2/2 as requested but I'm not sure what DT maintainers will
> say about it. I'd suggest to take this fix if there are not more
> objections on net changes so regression can be fixed. I believe we can
> take more time to improve Linux dealing with switch to be more optimal.

It's a good thing you added it, it created a better perspective into
what problem you are trying to fix.

Please look into implementing a solution based on commit b79d7c14f480
("net: dsa: introduce preferred_default_local_cpu_port and use on
MT7530").

pw-bot: cr