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ptp: increase maximum adjustment of virtual clocks. 

Increase the maximum frequency offset of virtual clocks to 50% to enable
faster slewing corrections.

This value cannot be represented as scaled ppm when long has 32 bits,
but that is already the case for other drivers, even those that provide
the adjfine() function, i.e. 32-bit applications are expected to check
for the limit.

Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Cc: Yangbo Lu <yangbo.lu@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Miroslav Lichvar 2022-02-02 10:33:56 +01:00 committed by David S. Miller
parent bfcbb76b0f
commit f77222d693
1 changed files with 1 additions and 2 deletions
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3
drivers/ptp/ptp_vclock.c
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@ -84,8 +84,7 @@ static long ptp_vclock_refresh(struct ptp_clock_info *ptp)
static const struct ptp_clock_info ptp_vclock_info = {
.owner = THIS_MODULE,
.name = "ptp virtual clock",
/* The maximum ppb value that long scaled_ppm can support */
.max_adj = 32767999,
.max_adj = 500000000,
.adjfine = ptp_vclock_adjfine,
.adjtime = ptp_vclock_adjtime,
.gettime64 = ptp_vclock_gettime,