diff options
| -rw-r--r-- | drivers/ptp/ptp_clock.c | 3 | ||||
| -rw-r--r-- | include/linux/ptp_clock_kernel.h | 8 |
2 files changed, 10 insertions, 1 deletions
diff --git a/drivers/ptp/ptp_clock.c b/drivers/ptp/ptp_clock.c index e189fa1be21e..e60eab7f8a61 100644 --- a/drivers/ptp/ptp_clock.c +++ b/drivers/ptp/ptp_clock.c @@ -63,7 +63,7 @@ static void enqueue_external_timestamp(struct timestamp_event_queue *queue, spin_unlock_irqrestore(&queue->lock, flags); } -static s32 scaled_ppm_to_ppb(long ppm) +s32 scaled_ppm_to_ppb(long ppm) { /* * The 'freq' field in the 'struct timex' is in parts per @@ -82,6 +82,7 @@ static s32 scaled_ppm_to_ppb(long ppm) ppb >>= 13; return (s32) ppb; } +EXPORT_SYMBOL(scaled_ppm_to_ppb); /* posix clock implementation */ diff --git a/include/linux/ptp_clock_kernel.h b/include/linux/ptp_clock_kernel.h index 28eb9c792522..93cc4f1d444a 100644 --- a/include/linux/ptp_clock_kernel.h +++ b/include/linux/ptp_clock_kernel.h @@ -213,6 +213,14 @@ extern void ptp_clock_event(struct ptp_clock *ptp, extern int ptp_clock_index(struct ptp_clock *ptp); /** + * scaled_ppm_to_ppb() - convert scaled ppm to ppb + * + * @ppm: Parts per million, but with a 16 bit binary fractional field + */ + +extern s32 scaled_ppm_to_ppb(long ppm); + +/** * ptp_find_pin() - obtain the pin index of a given auxiliary function * * @ptp: The clock obtained from ptp_clock_register(). |