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refclock: add option to treat non-PPS refclocks as PPS

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Add pps option to the refclock directive to force chronyd to treat any
refclock as a PPS refclock. This is intended for refclocks that may
provide time off by a whole number of seconds due to missing or wrong
TAI/GPS->UTC conversion.
This commit is contained in:
Miroslav Lichvar
2017-05-11 13:58:17 +02:00
parent cff15f91d4
commit f31f68ae8e
3 changed files with 12 additions and 1 deletions
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5
refclock.c
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@@ -75,6 +75,7 @@ struct RCL_Instance_Record {
int driver_polled;
int poll;
int leap_status;
int pps_forced;
int pps_rate;
int pps_active;
int max_lock_age;
@@ -198,6 +199,7 @@ RCL_AddRefclock(RefclockParameters *params)
inst->poll = params->poll;
inst->driver_polled = 0;
inst->leap_status = LEAP_Normal;
inst->pps_forced = params->pps_forced;
inst->pps_rate = params->pps_rate;
inst->pps_active = 0;
inst->max_lock_age = params->max_lock_age;
@@ -362,6 +364,9 @@ RCL_AddSample(RCL_Instance instance, struct timespec *sample_time, double offset
double correction, dispersion;
struct timespec cooked_time;
if (instance->pps_forced)
return RCL_AddPulse(instance, sample_time, -offset);
LCL_GetOffsetCorrection(sample_time, &correction, &dispersion);
UTI_AddDoubleToTimespec(sample_time, correction, &cooked_time);
dispersion += instance->precision;