On Mon, Aug 07, 2017 at 03:47:58PM +0000, Ian Thompson wrote: > I first thought that application code may be stamping on some > configuration registers, and that might be the case, but to have the > glitch always be a second and not some random time is a bit weird.
On the contrary, the Altera HPS EMAC stores the time in two 32-bit registers, one representing seconds and the other nanoseconds. AFAICT, the hardware does not latch the time into the two registers on read, and so a one second error is to be expected. > Thoughts? The HW is broken by design. Your out-of-tree driver is probably also buggy. Sorry, Richard ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
