[PATCH net-next] net: phy: mediatek: support MT7530 PHYs on EN71221 MCM

[Caleb James DeLisle]

On 10/09/2026 01:02, Daniel Golle wrote:
> On Wed, Sep 09, 2026 at 09:32:50PM +0000, Caleb James DeLisle wrote:
>> The EcoNet EN751221 multi-chip module implementation of the MT7530
>> requires some additional configuration of the PHYs on startup.
>> The reason for this is not known, but it is possible that it has
>> to do with the fact that the EN751221 MCM implementation of the
>> MT7530 runs at an abnormal PLL frequency (362.5Mhz).
>>
>> Detect whether the MT7530 PHY is attached to the MDIO bus of an
>> EcoNet EN751221 switch and if so, apply the necessary register
>> updates.
>>
>> Co-developed-by: Matheus Sampaio Queiroga <srherobrine20 at gmail.com>
>> Signed-off-by: Matheus Sampaio Queiroga <srherobrine20 at gmail.com>
>> Signed-off-by: Caleb James DeLisle <cjd at cjdns.fr>
>> ---
>>   drivers/net/phy/mediatek/mtk-ge.c | 61 +++++++++++++++++++++++++++++++
>>   1 file changed, 61 insertions(+)
>>
>> diff --git a/drivers/net/phy/mediatek/mtk-ge.c b/drivers/net/phy/mediatek/mtk-ge.c
>> index 73d9b72f9d9e..42b06c40d703 100644
>> --- a/drivers/net/phy/mediatek/mtk-ge.c
>> +++ b/drivers/net/phy/mediatek/mtk-ge.c
>> [...]
>>   static int mt7530_phy_config_init(struct phy_device *phydev)
>>   {
>> +	int ret;
>> +
>> +	if (mt7530_phy_is_en751221_companion(phydev)) {
> Please introduce a `.match_phy_device` operation for both, actual
> MT7530 and EN751221, similar eg. to `ksz8051_match_phy_device` in
> micrel.c.

Sounds good, since this will certainly collide with 
https://lore.kernel.org/netdev/20260827065930.2618729-2-cjd@cjdns.fr/ 
would you prefer them in the same patch, or as a patch set? If you'd 
like I can do this and the FE phy as a common patch set. Let me know 
what you prefer.

Thanks,

Caleb