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>

diff --git a/drivers/ptp/ptp_clock.c b/drivers/ptp/ptp_clock.c
index f519a131238d7df6a38cd7326c36f2f2cc4369d7..1e528b539a07f202a04b9e9dbdfbffbac6656703 100644 (file)
--- 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)

diff --git a/include/linux/ptp_clock_kernel.h b/include/linux/ptp_clock_kernel.h
index dd2e44fba63e769ef6315d654e566f5b178193b1..945704c2ed65307bb8ec47c39cbd24d364b40fa3 100644 (file)
--- a/include/linux/ptp_clock_kernel.h
+++ b/include/linux/ptp_clock_kernel.h
@@ -136,4 +136,12 @@ struct ptp_clock_event {
 extern void ptp_clock_event(struct ptp_clock *ptp,
                            struct ptp_clock_event *event);
 
+/**
+ * ptp_clock_index() - obtain the device index of a PTP clock
+ *
+ * @ptp:    The clock obtained from ptp_clock_register().
+ */
+
+extern int ptp_clock_index(struct ptp_clock *ptp);
+
 #endif