From 39a8cbd9ca051fb164db70315e7972de5c153c33 Mon Sep 17 00:00:00 2001 From: Richard Cochran Date: Sat, 22 Sep 2012 07:02:01 +0000 Subject: ptp: remember the adjusted frequency 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 Signed-off-by: David S. Miller --- drivers/ptp/ptp_clock.c | 1 + drivers/ptp/ptp_private.h | 1 + 2 files changed, 2 insertions(+) (limited to 'drivers/ptp') diff --git a/drivers/ptp/ptp_clock.c b/drivers/ptp/ptp_clock.c index 966875dcda5..67e628ee036 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 4d5b5082c3b..69d32070cc6 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; -- cgit v1.2.3-18-g5258