Hi Andrew, On Thu, 19 Nov 2020 16:16:41 +0100 Andrew Lunn <and...@lunn.ch> wrote:
>Hi Maxime > >> The way this works is that the PHY is internally configured by chaining >> 2 internal PHYs back to back. One PHY deals with the Host interface and >> is configured as an SGMII to QSGMII converter (the QSGMII is only used >> from within the PHY), and the other PHY acts as the Media-side PHY, >> configured in QSGMII to auto-media (RJ45 or Fiber (SFP)) : >> >> +- 88e1543 -----------------------+ >> +-----+ | +--------+ +--------+ | /-- Copper (RJ45) >> | |--SGMII----| Port 0 |--QSGMII--| Port 1 |----< >> | | | +--------+ +--------+ | \--- Fiber >> | MAC | | | >> | | | +--------+ +--------+ | /-- Copper (RJ45) >> | |--SGMII----| Port 2 |--QSGMII--| Port 3 |----< >> +-----+ | +--------+ +--------+ | \-- Fiber >> +---------------------------------+ > >Does this mean you need a dual port MAC as well? > >Do we need to configure the MUX in the MAC? No, it's my schematic that is misleading in that case :) The 2 ports are independent of each other. There isn't any configuration on the MAC part for that setup. Thanks, Maxime -- Maxime Chevallier, Bootlin Embedded Linux and kernel engineering https://bootlin.com
