On Fri, Feb 27, 2015 at 05:09:24PM +0000, Stathis Voukelatos wrote: > To summarize (and confirm my understanding) your suggestion is for the > sniffer to be configured to match PTP packets and (similarly to the > dp83640) return the Message Type and Sequence Id fields that will allow > them to be matched to an sk_buf that has been passed from the stack. > Then the sk_buf can be timestamped using the sniffer timestamp. Yes. > The H/W does have the capability to do that. However, in order to > implement it there will be some architectural changes needed > in the kernel. This module cannot really pretend to be a PHY. > In the real world it sits between the MAC and the PHY. Right. Here is one idea. Put a link to the TS device in the PHY's DT node. Then, in phy_probe, check if the PHY's four methods, ts_info, hwtstamp, rxtstamp, and txtstamp, are all null. If so, check for a DT link from the PHY's node to a TS device driver. If found, then set the four methods to call into the TS driver's callbacks. Just off of the top of my head. Thanks, Richard -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
