diff options
| author | Radu Pirea (NXP OSS) <radu-nicolae.pirea@oss.nxp.com> | 2021-05-10 18:34:32 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-05-10 14:54:23 -0700 |
| commit | 9d9d415f0048e4f7a6109595e2d1657850569c6c (patch) | |
| tree | 225109473aea67be3c15d38685495d80da1d6972 /drivers | |
| parent | 532062b099563cba7a93bd9bd50554948661f013 (diff) | |
| download | linux-9d9d415f0048e4f7a6109595e2d1657850569c6c.tar.bz2 | |
ptp: ptp_clock: make scaled_ppm_to_ppb static inline
Make scaled_ppm_to_ppb static inline to be able to build drivers that
use this function even with PTP_1588_CLOCK disabled.
Signed-off-by: Radu Pirea (NXP OSS) <radu-nicolae.pirea@oss.nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/ptp/ptp_clock.c | 21 |
1 files changed, 0 insertions, 21 deletions
diff --git a/drivers/ptp/ptp_clock.c b/drivers/ptp/ptp_clock.c index 03a246e60fd9..a780435331c8 100644 --- a/drivers/ptp/ptp_clock.c +++ b/drivers/ptp/ptp_clock.c @@ -63,27 +63,6 @@ static void enqueue_external_timestamp(struct timestamp_event_queue *queue, spin_unlock_irqrestore(&queue->lock, flags); } -s32 scaled_ppm_to_ppb(long ppm) -{ - /* - * The 'freq' field in the 'struct timex' is in parts per - * million, but with a 16 bit binary fractional field. - * - * We want to calculate - * - * ppb = scaled_ppm * 1000 / 2^16 - * - * which simplifies to - * - * ppb = scaled_ppm * 125 / 2^13 - */ - s64 ppb = 1 + ppm; - ppb *= 125; - ppb >>= 13; - return (s32) ppb; -} -EXPORT_SYMBOL(scaled_ppm_to_ppb); - /* posix clock implementation */ static int ptp_clock_getres(struct posix_clock *pc, struct timespec64 *tp) |