I quick update. I got the DP83640 up and running as PTP-slave with my Cyclone V SoC. Kernel 4.1.22 did not work for me, I had to change to 4.18 and do the following change in stmmac_main.c in function stmmac_ioctl: -- case SIOCSHWTSTAMP: ret = phy_mii_ioctl(dev->phydev, rq, cmd); //ret = stmmac_hwtstamp_ioctl(dev, rq); break; --
I used the ptp-mmi-tool to enable a 1PPS signal out of the DP83640: In ptp-mmi-tool.c I replaced TWOTO32 with TWOTO16 : //#define TWOTO32 4294967296 #define TWOTO16 65536 to get correct time values when enabling 1PPS. Now I have a master using MAC-timestamp and a slave using PHY-timestamping. However, the 1PPS accuracy/jitter is the same (180ns measured over 15min) as when using MAC timestamp for both master and slave. BR AD Sent: Thursday, January 24, 2019 at 4:52 PM From: "Richard Cochran" <richardcoch...@gmail.com> To: "Arthur Dent" <arthurd...@cyberdude.com> Cc: "Wolfgang Hennig" <when...@xia.com>, linuxptp-users@lists.sourceforge.net Subject: Re: [Linuxptp-users] PHYs supporting HW timestamping On Thu, Jan 24, 2019 at 03:22:58PM +0100, Arthur Dent wrote: > I addition to /dev/ptp0 I also have/dev/ptp1 (for the MAC). Can this confuse > the system? I read somewhere that the MACs PHC must be disabled...? Yes, that is right. Disable the MAC's PHC driver or rip out its code. Thanks, Richard _______________________________________________ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
