Re: [PATCH RFC] Providing a helper for PCS inband negotiation

Andrew Lunn
2023-05-15T13:59:14Z

> 2. XLGMII.. Looking at the XPCS driver, it's unclear whether Clause 73
> AN gets used for this. A quick scan of IEEE 802.3 suggests that
> XLGMII doesn't have any support for any inband signalling, and it's
> just an intermediary protocol between the MAC (more specifically the
> RS, but for the purposes of this I'll just refer to MAC) and the
> attached PCS, and any autonegotiation happens after the XLGMII link.

So isn't XLGMII then a generic PHY thing, not a phylink thing?

Or am i not correctly understanding how
drivers/phy/marvell/phy-*-comphy.c and
drivers/phy/microchip/*_serdev.c fit into the overall picture?

Andrew