Hi Andrew, > > > Here I just focus on GMAC since there are other LAN interfaces that S32 > > > family > > > uses [e.g. PFE]. According to the public GMACSUBSYS ref manual rev2[1] > > > provided > > > on NXP website, theoretically GMAC can run SGMII in 1000Mbps and > > > 2500Mbps so I > > > assume that supporting 1000BASE-X could be achievable. I'm not sure if > any > > > S32 > > > board variant might have SFP ports but RJ-45 [1000BASE-T] should be the > > > major > > > type used on S32G-EVB and S32G-RDB2. > > > > > > @NXP, please feel free to correct me if anything wrong. > > > > > > > NXP eval boards (EVB or RDB) have also 2.5G PHYs, so together with SerDes > > driver we support 100M/1G/2.5G on such copper PHYs. > > Hi Jan > > Does the SERDES clock need to change when going between 1000BaseX and > 2500BaseX? > > If so, it sounds like Linux not having control of that clock is going > to limit what can be supported. No, the SerDes clock remains the same, the change is done internally, without any necessity of clock change intervention by GMAC driver. /Jan
