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authorRichard Cochran <richardcochran@gmail.com>2020-05-24 21:27:10 +0300
committerDavid S. Miller <davem@davemloft.net>2020-05-26 03:55:17 +0300
commiteabd5c9dd0c0b8d471d144801c8302a4eff6eb27 (patch)
tree9f3a0283aed87fe5cd117a49e7dc9eeb5439e3db /drivers/ptp
parent45af29ca761c275e350cca659856bc56f1035ef9 (diff)
downloadlinux-eabd5c9dd0c0b8d471d144801c8302a4eff6eb27.tar.xz
ptp_clock: Let the ADJ_OFFSET interface respect the ADJ_NANO flag for PHC devices.
In commit 184ecc9eb260d5a3bcdddc5bebd18f285ac004e9 ("ptp: Add adjphase function to support phase offset control.") the PTP Hardware Clock interface expanded to support the ADJ_OFFSET offset mode. However, the implementation did not respect the traditional yet pedantic distinction between units of microseconds and nanoseconds signaled by the ADJ_NANO flag. This patch fixes the issue by adding logic to handle that flag. Signed-off-by: Richard Cochran <richardcochran@gmail.com> Reviewed-by: Vincent Cheng <vincent.cheng.xh@renesas.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/ptp')
-rw-r--r--drivers/ptp/ptp_clock.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/ptp/ptp_clock.c b/drivers/ptp/ptp_clock.c
index fc984a8828fb..03a246e60fd9 100644
--- a/drivers/ptp/ptp_clock.c
+++ b/drivers/ptp/ptp_clock.c
@@ -147,8 +147,14 @@ static int ptp_clock_adjtime(struct posix_clock *pc, struct __kernel_timex *tx)
err = ops->adjfreq(ops, ppb);
ptp->dialed_frequency = tx->freq;
} else if (tx->modes & ADJ_OFFSET) {
- if (ops->adjphase)
- err = ops->adjphase(ops, tx->offset);
+ if (ops->adjphase) {
+ s32 offset = tx->offset;
+
+ if (!(tx->modes & ADJ_NANO))
+ offset *= NSEC_PER_USEC;
+
+ err = ops->adjphase(ops, offset);
+ }
} else if (tx->modes == 0) {
tx->freq = ptp->dialed_frequency;
err = 0;