On 3/14/24 05:20, Arınç ÜNAL via B4 Relay wrote:
From: Arınç ÜNAL <arinc.unal@xxxxxxxxxx> The MT7531 switch listens on PHY address 0x1f on an MDIO bus. I've got two findings that support this. There's no bootstrapping option to change the PHY address of the switch. The Linux driver hardcodes 0x1f as the PHY address of the switch. So the reg property on the device tree is currently ignored by the Linux driver. Therefore, describe the correct PHY address on boards that have this switch.
Can we call it a pseudo PHY to use a similar terminology as what is done through drivers/net/dsa/{bcm_sf2,b53}*?
This is not a real PHY as in it has no actual transceiver/digital signal processing logic, this is a piece of logic that snoops for MDIO transactions at that specific address and lets you access the switch's internal register as if it was a MDIO device.
LGTM otherwise! -- Florian
