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| author | Richard Cochran <richardcochran@gmail.com> | 2012-09-22 07:02:01 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-09-22 15:41:29 -0400 |
| commit | 39a8cbd9ca051fb164db70315e7972de5c153c33 (patch) | |
| tree | c273bdec9420a47bf34a6e8985b102481d41bca3 /drivers/ptp | |
| parent | 717ecc276dadf31cd858d4e56ac71c3cc479fc19 (diff) | |
| download | lwn-39a8cbd9ca051fb164db70315e7972de5c153c33.tar.gz lwn-39a8cbd9ca051fb164db70315e7972de5c153c33.zip | |
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 <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/ptp')
| -rw-r--r-- | drivers/ptp/ptp_clock.c | 1 | ||||
| -rw-r--r-- | 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 966875dcda56..67e628ee0365 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 4d5b5082c3b1..69d32070cc65 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; |