| Date | Sun, 8 Oct 2017 11:12:29 -0400 | From | Richard Cochran <> | Subject | Re: [PATCH net-next RFC 8/9] net: dsa: mv88e6xxx: add rx/tx timestamping support |
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On Thu, Sep 28, 2017 at 10:25:40AM -0500, Brandon Streiff wrote: > We also utilize a feature of the "generation 3" PTP hardware that lets > us to embed the timestamp value into one of the reserved fields in the > PTP header. This lets us extract the timestamp out of the header and > avoid an SMI access in the RX codepath. (This implementation does not > presently support the older generations.)
That is fine for the later models, but we really need the code to read over MDIO as well. You added .ptp_support = true for those older switches, and so the present series won't work.
If it helps, maybe I can adapt the relevant code from my driver to your work.
Thanks, Richard
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