[PATCH net] net: dsa: mt7530: do not advertise EEE on MT7621 switch

[Andrew Lunn]

On Tue, Aug 18, 2026 at 09:28:29PM +0300, Vladislav Karmanov wrote:
> From: Shiji Yang <yangshiji66 at outlook.com>
> Date: Sat, 28 Mar 2026 23:29:56 +0800
> 
> There are hardware defects in the MT7621 (MT7530) EEE support: with EEE
> advertised, some link partners cannot establish a stable connection.
> Notably, on a 2-pair (4-wire) cable where both ends advertise gigabit,
> 1000BASE-T training cannot succeed, and instead of falling back to
> 100 Mbps the port flaps in a loop and no link/DHCP lease is obtained.
> This is confined to the WAN / phylib bring-up path; the DSA/LAN side on
> the same device is unaffected.

Do we know what is broken here? MAC or PHY?

If it is the PHY which is broken, it would be better to put the
workaround into the PHY driver.

	Andrew