ptp: Add a method for obtaining the device index.

This commit adds a method that MAC drivers may call in order to find out
the device number of their associated PTP Hardware Clock.

Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/ptp/ptp_clock.c b/drivers/ptp/ptp_clock.c
index f519a131238d..1e528b539a07 100644
--- a/drivers/ptp/ptp_clock.c
+++ b/drivers/ptp/ptp_clock.c
@@ -304,6 +304,12 @@ void ptp_clock_event(struct ptp_clock *ptp, struct ptp_clock_event *event)
 }
 EXPORT_SYMBOL(ptp_clock_event);
 
+int ptp_clock_index(struct ptp_clock *ptp)
+{
+        return ptp->index;
+}
+EXPORT_SYMBOL(ptp_clock_index);
+
 /* module operations */
 
 static void __exit ptp_exit(void)