The API to obtain the time stamp of a PPS source indicates the validity of
the returned value. However, the current code does not ever test the
validity information in any way. This patch lets the clients ignore PPS
values that lack a valid time stamp.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Each slave creates an instance of a servo. However, when cleaning up, the
code neglected to free the servo, resulting in a memory leak. This patch
fixes the issue by calling the appropriate method to destroy the servo.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
When creating a ts2phc slave, a clock is obtained by invoking the
posix_clock_open() method. However, in case of an error, the same clock
is closed again by calling close(2) on the associated file descriptor
directly. While not incorrect, still the code should instead use the
close function that matches the open method.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Some PTP Hardware Clocks have input pins that can generate time stamps
on the edges of external signals. This functionality can be used in
various ways. For example, one can synchronize a PHC device to a
global time source by taking a Pulse Per Second signal from the source
into the PHC. This patch adds support for synchronizing one or more
PHC slaves to a given master clock.
The implementation follows a modular design that allows adding
different kinds of master clocks in the future. This patch starts off
with a single "generic" PPS master, meaning a PPS signal that lacks
and time or date information. The generic master assumes that the
Linux system time is approximately correct (by NTP or RTC for example)
in order to calculate the time of the incoming PPS edges.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: Balint Ferencz <fernya@gmail.com>
Richard Cochran