1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * PTP 1588 clock support - User space test program
35 #define CLOCK_INVALID -1
105 	 * we simply use double precision math, in order to avoid the  in ppb_to_scaled_ppm()
113 	return t->sec * 1000000000LL + t->nsec;  in pctns()
120 		" -c         query the ptp clock's capabilities\n"  in usage()
121 		" -d name    device to open\n"  in usage()
122 		" -e val     read 'val' external time stamp events\n"  in usage()
123 		" -f val     adjust the ptp clock frequency by 'val' ppb\n"  in usage()
124 		" -g         get the ptp clock time\n"  in usage()
125 		" -h         prints this message\n"  in usage()
126 		" -i val     index for event/trigger\n"  in usage()
127 		" -k val     measure the time offset between system and phc clock\n"  in usage()
129 		" -l         list the current pin configuration\n"  in usage()
130 		" -L pin,val configure pin index 'pin' with function 'val'\n"  in usage()
131 		"            the channel index is taken from the '-i' option\n"  in usage()
133 		"            0 - none\n"  in usage()
134 		"            1 - external time stamp\n"  in usage()
135 		"            2 - periodic output\n"  in usage()
136 		" -p val     enable output with a period of 'val' nanoseconds\n"  in usage()
137 		" -H val     set output phase to 'val' nanoseconds (requires -p)\n"  in usage()
138 		" -w val     set output pulse width to 'val' nanoseconds (requires -p)\n"  in usage()
139 		" -P val     enable or disable (val=1|0) the system clock PPS\n"  in usage()
140 		" -s         set the ptp clock time from the system time\n"  in usage()
141 		" -S         set the system time from the ptp clock time\n"  in usage()
142 		" -t val     shift the ptp clock time by 'val' seconds\n"  in usage()
143 		" -T val     set the ptp clock time to 'val' seconds\n"  in usage()
144 		" -z         test combinations of rising/falling external time stamp flags\n",  in usage()
176 	int pin_index = -1, pin_func;  in main()
177 	int pps = -1;  in main()
183 	int64_t perout_phase = -1;  in main()
184 	int64_t pulsewidth = -1;  in main()
185 	int64_t perout = -1;  in main()
223 				return -1;  in main()
257 			return -1;  in main()
264 		return -1;  in main()
270 		return -1;  in main()
367 		for (; extts; extts--) {  in main()
407 		puts("-w can only be specified together with -p");  in main()
408 		return -1;  in main()
412 		puts("-H can only be specified together with -p");  in main()
413 		return -1;  in main()
419 			return -1;  in main()
433 			perout_request.phase.sec = perout_phase / NSEC_PER_SEC;  in main()
434 			perout_request.phase.nsec = perout_phase % NSEC_PER_SEC;  in main()
459 	if (pps != -1) {  in main()
472 			return -1;  in main()
478 			return -1;  in main()
480 		sysoff->n_samples = n_samples;  in main()
487 		pct = &sysoff->ts[0];  in main()
488 		for (i = 0; i < sysoff->n_samples; i++) {  in main()
492 			interval = t2 - t1;  in main()
493 			offset = (t2 + t1) / 2 - tp;  in main()
496 				(pct+2*i)->sec, (pct+2*i)->nsec);  in main()
498 				(pct+2*i+1)->sec, (pct+2*i+1)->nsec);  in main()
500 				(pct+2*i+2)->sec, (pct+2*i+2)->nsec);  in main()