[PATCH v3 10/11] timecounter.h: Add _Timecounter_Discipline()
Gabriel Moyano
gabriel.moyano at dlr.de
Wed May 4 12:12:06 UTC 2022
---
cpukit/include/rtems/score/timecounter.h | 17 +++++++++++++++++
cpukit/include/sys/timepps.h | 3 +++
2 files changed, 20 insertions(+)
diff --git a/cpukit/include/rtems/score/timecounter.h b/cpukit/include/rtems/score/timecounter.h
index fdade06128..95e0839cff 100644
--- a/cpukit/include/rtems/score/timecounter.h
+++ b/cpukit/include/rtems/score/timecounter.h
@@ -300,6 +300,23 @@ void _Timecounter_NTP_update_second(int64_t *adjustment, time_t *newsec);
*/
uint64_t _Timecounter_Get_frequency(void);
+/**
+ * @brief Updates the timecounter frequency adjustment used by
+ * _Timecounter_Set_NTP_update_second().
+ *
+ * This function is part of the time synchronization using a PPS
+ * (Pulse Per Second) signal.
+ *
+ * When an event (a rising or falling edge of the PPS signal) occurs, the
+ * functions pps_capture() and pps_event() are executed. Only if the kernel
+ * consumer is configured to be PPS_KC_HARDPPS, the timecounter is disciplined.
+ *
+ * @param[in] tsp is the time at PPS event
+ *
+ * @param[i] nsec is the time in nanoseconds from the last PPS event
+ */
+void _Timecounter_Discipline(struct timespec *tsp, long nsec);
+
/** @} */
#ifdef __cplusplus
diff --git a/cpukit/include/sys/timepps.h b/cpukit/include/sys/timepps.h
index 56c1cc43ca..0eb4246a39 100644
--- a/cpukit/include/sys/timepps.h
+++ b/cpukit/include/sys/timepps.h
@@ -27,6 +27,7 @@
#ifdef __rtems__
#include <rtems/score/atomic.h>
#define PPS_SYNC
+#define hardpps _Timecounter_Discipline
#endif /* __rtems__ */
#define PPS_API_VERS_1 1
@@ -200,7 +201,9 @@ void pps_event(struct pps_state *pps, int event);
void pps_init(struct pps_state *pps);
void pps_init_abi(struct pps_state *pps);
int pps_ioctl(unsigned long cmd, caddr_t data, struct pps_state *pps);
+#ifndef __rtems__
void hardpps(struct timespec *tsp, long nsec);
+#endif /* __rtems__ */
#else /* !_KERNEL */
--
2.25.1
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