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Diffstat (limited to 'include/linux/ptp_clock_kernel.h')
-rw-r--r--include/linux/ptp_clock_kernel.h33
1 files changed, 33 insertions, 0 deletions
diff --git a/include/linux/ptp_clock_kernel.h b/include/linux/ptp_clock_kernel.h
index 51349d124ee5..7121bbe76979 100644
--- a/include/linux/ptp_clock_kernel.h
+++ b/include/linux/ptp_clock_kernel.h
@@ -39,6 +39,15 @@ struct ptp_clock_request {
};
struct system_device_crosststamp;
+
+/**
+ * struct ptp_system_timestamp - system time corresponding to a PHC timestamp
+ */
+struct ptp_system_timestamp {
+ struct timespec64 pre_ts;
+ struct timespec64 post_ts;
+};
+
/**
* struct ptp_clock_info - decribes a PTP hardware clock
*
@@ -73,8 +82,18 @@ struct system_device_crosststamp;
* parameter delta: Desired change in nanoseconds.
*
* @gettime64: Reads the current time from the hardware clock.
+ * This method is deprecated. New drivers should implement
+ * the @gettimex64 method instead.
* parameter ts: Holds the result.
*
+ * @gettimex64: Reads the current time from the hardware clock and optionally
+ * also the system clock.
+ * parameter ts: Holds the PHC timestamp.
+ * parameter sts: If not NULL, it holds a pair of timestamps from
+ * the system clock. The first reading is made right before
+ * reading the lowest bits of the PHC timestamp and the second
+ * reading immediately follows that.
+ *
* @getcrosststamp: Reads the current time from the hardware clock and
* system clock simultaneously.
* parameter cts: Contains timestamp (device,system) pair,
@@ -124,6 +143,8 @@ struct ptp_clock_info {
int (*adjfreq)(struct ptp_clock_info *ptp, s32 delta);
int (*adjtime)(struct ptp_clock_info *ptp, s64 delta);
int (*gettime64)(struct ptp_clock_info *ptp, struct timespec64 *ts);
+ int (*gettimex64)(struct ptp_clock_info *ptp, struct timespec64 *ts,
+ struct ptp_system_timestamp *sts);
int (*getcrosststamp)(struct ptp_clock_info *ptp,
struct system_device_crosststamp *cts);
int (*settime64)(struct ptp_clock_info *p, const struct timespec64 *ts);
@@ -247,4 +268,16 @@ static inline int ptp_schedule_worker(struct ptp_clock *ptp,
#endif
+static inline void ptp_read_system_prets(struct ptp_system_timestamp *sts)
+{
+ if (sts)
+ ktime_get_real_ts64(&sts->pre_ts);
+}
+
+static inline void ptp_read_system_postts(struct ptp_system_timestamp *sts)
+{
+ if (sts)
+ ktime_get_real_ts64(&sts->post_ts);
+}
+
#endif