*-r*, *--raw*::
Use raw output format.
-*-r*, *--time* _clock_
+*-r*, *--time* _clock_::
Show current time of one specific clocks.
-*--no-discover-dynamic*
+*--no-discover-dynamic*::
Do not try to discover dynamic clocks.
-*-d*, *--dynamic-clock* _path_
+*-d*, *--dynamic-clock* _path_::
Also display specified dynamic clock.
Can be specified multiple times.
-*-c*, *--cpu-clock* _pid_
+*--no-discover-rtc*::
+Do not try to discover RTCs.
+
+*-x*, *--rtc* _path_::
+Also display specified RTC.
+Can be specified multiple times.
+
+*-c*, *--cpu-clock* _pid_::
Also display CPU clock of specified process.
Can be specified multiple times.