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

[Benjamin Larsson]

Hi.

On 18/08/2026 20:42, Daniel Golle wrote:
> Hi,
> 

> 
> It'd be very surprising if this limitation doesn't also apply for the
> nearly identical decicated MT7530 IC (found eg. on BananaPi R2).
> 
> I'd recommend disabling EEE advertisement on MT7621 and MT7530; and I
> suspect that some of the older Trendnet/Econet SoCs which share common
> linage with the MediaTek's Ethernet switch and PHY designs could also
> be affected.

The phy should be similar to Vitesse also.

> 
> Hence I'd suggest to extend 'struct mt753x_info' with a 'broken_eee'
> bool instead of maintining an in-code list of EEE-broken silicon IDs.
> 
>> +		/* Disable EEE advertisement on the switch PHYs. */
>> +		for (i = MT753X_CTRL_PHY_ADDR(priv->mdiodev->addr);
>> +		     i < MT753X_CTRL_PHY_ADDR(priv->mdiodev->addr) + MT7530_NUM_PHYS;
>> +		     i++) {
>> +			mt7530_phy_write_c45(priv, i, MDIO_MMD_AN, MDIO_AN_EEE_ADV, 0);
>> +		}
>> +	}
>> +
> 
> 

MvH
Benjamin Larsson