[PATCH V3 net-next 1/4] ptp: remember the adjusted frequency
From: Richard Cochran <richardcochran@gmail.com>
Date: 2012-09-22 17:02:19
Subsystem:
networking drivers, ptp hardware clock support, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Richard Cochran, Linus Torvalds
This patch adds a field to the representation of a PTP hardware clock in order to remember the frequency adjustment value dialed by the user. Adding this field will let us answer queries in the manner of adjtimex in a follow on patch. Signed-off-by: Richard Cochran <richardcochran@gmail.com> --- drivers/ptp/ptp_clock.c | 1 + drivers/ptp/ptp_private.h | 1 + 2 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/drivers/ptp/ptp_clock.c b/drivers/ptp/ptp_clock.c
index 966875d..67e628e 100644
--- a/drivers/ptp/ptp_clock.c
+++ b/drivers/ptp/ptp_clock.c@@ -147,6 +147,7 @@ static int ptp_clock_adjtime(struct posix_clock *pc, struct timex *tx) } else if (tx->modes & ADJ_FREQUENCY) { err = ops->adjfreq(ops, scaled_ppm_to_ppb(tx->freq)); + ptp->dialed_frequency = tx->freq; } return err;
diff --git a/drivers/ptp/ptp_private.h b/drivers/ptp/ptp_private.h
index 4d5b508..69d3207 100644
--- a/drivers/ptp/ptp_private.h
+++ b/drivers/ptp/ptp_private.h@@ -45,6 +45,7 @@ struct ptp_clock { dev_t devid; int index; /* index into clocks.map */ struct pps_device *pps_source; + long dialed_frequency; /* remembers the frequency adjustment */ struct timestamp_event_queue tsevq; /* simple fifo for time stamps */ struct mutex tsevq_mux; /* one process at a time reading the fifo */ wait_queue_head_t tsev_wq;
--
1.7.2.5