The use case, PTP is used just as a TOD source and the PHC is disciplined using PPS.
Regards Saravanan From: Miroslav Lichvar <mlich...@redhat.com> Date: Monday, July 24, 2023 at 12:22 AM To: Arun Saravanan <sa...@nvidia.com> Cc: linuxptp-devel@lists.sourceforge.net <linuxptp-devel@lists.sourceforge.net> Subject: Re: [Linuxptp-devel] [PATCH] PHC Index is invalid in phc2sys when ptp4l is in free_running mode. External email: Use caution opening links or attachments On Sun, Jul 23, 2023 at 12:09:52PM -0700, Saravanan Arunachalam via Linuxptp-devel wrote: > The pmc call to ptp4l to get phc_index returns invalid value since in > free_running mode, ptp4l sets phc_index to -1. Adding a socket call in > phc2sys to get the phc_index. Can you please describe the use case? It's not clear to me why should be a free-running PHC adjusted or or used as a source clock. -- Miroslav Lichvar
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