Re: [EXT] Re: [PATCH net-next 02/10] net: phy: phylink: allow 10GKR interface to use in-band negotiation
From: Antoine Tenart <hidden>
Date: 2018-03-19 13:13:46
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linux-arm-kernel, lkml
On Mon, Mar 19, 2018 at 02:08:23PM +0100, Andrew Lunn wrote:
quoted
quoted
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