On Mon, Mar 19, 2018 at 02:08:23PM +0100, Andrew Lunn wrote: > > > If they don't have PHYs, how are the connected to the outside world? > > > > By external SFP or direct attached cable. > > Maybe i'm missing something, but don't you just need to add an SFP > device in the device tree. The SFP code and PHYLINK will work > together, query what the SFP module is, use the GPIOs to determine > link up/down and module present, and tell the MAC how to configure the > MAC-SFP link?
This would definitively work for SFP connectors with a PHY, but would that work when using direct attached cable? As in the second case phylink wouldn't be able to ask the SFP PHY for the link state. Antoine -- Antoine Ténart, Bootlin (formerly Free Electrons) Embedded Linux and Kernel engineering https://bootlin.com
