[PATCH 4.19 042/109] ptp: ptp_clock: Publish scaled_ppm_to_ppb
From: Sasha Levin <sashal@kernel.org>
Date: 2021-06-28 14:55:17
Also in:
lkml
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
From: Shalom Toledo <redacted> [ Upstream commit 4368dada5b37e74a13b892ca5cef8a7d558e9a5f ] Publish scaled_ppm_to_ppb to allow drivers to use it. Signed-off-by: Shalom Toledo <redacted> Reviewed-by: Petr Machata <redacted> Signed-off-by: Ido Schimmel <redacted> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/ptp/ptp_clock.c | 3 ++- include/linux/ptp_clock_kernel.h | 8 ++++++++ 2 files changed, 10 insertions(+), 1 deletion(-)
diff --git a/drivers/ptp/ptp_clock.c b/drivers/ptp/ptp_clock.c
index e232233beb8f..863958f3bb57 100644
--- a/drivers/ptp/ptp_clock.c
+++ b/drivers/ptp/ptp_clock.c@@ -76,7 +76,7 @@ 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
@@ -95,6 +95,7 @@ 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 51349d124ee5..40ea83fcfdd5 100644
--- a/include/linux/ptp_clock_kernel.h
+++ b/include/linux/ptp_clock_kernel.h@@ -204,6 +204,14 @@ 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 *
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2.30.2