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-rw-r--r--drivers/ptp/ptp_clock.c6
-rw-r--r--include/linux/ptp_clock_kernel.h8
2 files changed, 14 insertions, 0 deletions
diff --git a/drivers/ptp/ptp_clock.c b/drivers/ptp/ptp_clock.c
index f519a131238..1e528b539a0 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)
diff --git a/include/linux/ptp_clock_kernel.h b/include/linux/ptp_clock_kernel.h
index dd2e44fba63..945704c2ed6 100644
--- 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