Messages in this thread | | | Date | Tue, 8 Feb 2022 03:09:48 +0100 | From | Andrew Lunn <> | Subject | Re: [PATCH] net: phy: mscc: enable MAC SerDes autonegotiation |
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> MAC implementation[1] in a lot of NXP SoCs comes with in-band aneg enabled > by default, and it does expect Clause 37 auto-negotiation to complete > between MAC and PHY before the actual data transfer happens. > > [1] https://community.nxp.com/pwmxy87654/attachments/pwmxy87654/t-series/3241/1/AN3869(1).pdf > > I faced such issue while integrating VSC85xx PHY > with one of the recent NXP SoC having similar MAC implementation. > Not sure if this is a problem on MAC side or PHY side, > But having Clause 37 support should help in most cases I believe.
So please use this information in the commit message.
The only danger with this change is, is the PHY O.K with auto-neg turned on, with a MAC which does not actually perform auto-neg? It could be we have boards which work now because PHY autoneg is turned off.
Andrew
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