selftests/ptp: Add -X option for testing PTP_SYS_OFFSET_PRECISE

The -X option was chosen because X looks like a cross, and the underlying
callback is 'get cross timestamp'.
Signed-off-by: Alex Maftei <alex.maftei@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

tools/testing/selftests/ptp/testptp.c

@@ -144,6 +144,7 @@ static void usage(char *progname)
 		" -t val     shift the ptp clock time by 'val' seconds\n"
 		" -T val     set the ptp clock time to 'val' seconds\n"
 		" -x val     get an extended ptp clock time with the desired number of samples (up to %d)\n"
+		" -X         get a ptp clock cross timestamp\n"
 		" -z         test combinations of rising/falling external time stamp flags\n",
 		progname, PTP_MAX_SAMPLES);
 }
@@ -160,6 +161,7 @@ int main(int argc, char *argv[])
 	struct ptp_clock_time *pct;
 	struct ptp_sys_offset *sysoff;
 	struct ptp_sys_offset_extended *soe;
+	struct ptp_sys_offset_precise *xts;
 
 	char *progname;
 	unsigned int i;
@@ -179,6 +181,7 @@ int main(int argc, char *argv[])
 	int list_pins = 0;
 	int pct_offset = 0;
 	int getextended = 0;
+	int getcross = 0;
 	int n_samples = 0;
 	int pin_index = -1, pin_func;
 	int pps = -1;
@@ -193,7 +196,7 @@ int main(int argc, char *argv[])
 
 	progname = strrchr(argv[0], '/');
 	progname = progname ? 1+progname : argv[0];
-	while (EOF != (c = getopt(argc, argv, "cd:e:f:ghH:i:k:lL:n:o:p:P:sSt:T:w:x:z"))) {
+	while (EOF != (c = getopt(argc, argv, "cd:e:f:ghH:i:k:lL:n:o:p:P:sSt:T:w:x:Xz"))) {
 		switch (c) {
 		case 'c':
 			capabilities = 1;
@@ -267,6 +270,9 @@ int main(int argc, char *argv[])
 				return -1;
 			}
 			break;
+		case 'X':
+			getcross = 1;
+			break;
 		case 'z':
 			flagtest = 1;
 			break;
@@ -575,6 +581,29 @@ int main(int argc, char *argv[])
 		free(soe);
 	}
 
+	if (getcross) {
+		xts = calloc(1, sizeof(*xts));
+		if (!xts) {
+			perror("calloc");
+			return -1;
+		}
+
+		if (ioctl(fd, PTP_SYS_OFFSET_PRECISE, xts)) {
+			perror("PTP_SYS_OFFSET_PRECISE");
+		} else {
+			puts("system and phc crosstimestamping request okay");
+
+			printf("device time: %lld.%09u\n",
+			       xts->device.sec, xts->device.nsec);
+			printf("system time: %lld.%09u\n",
+			       xts->sys_realtime.sec, xts->sys_realtime.nsec);
+			printf("monoraw time: %lld.%09u\n",
+			       xts->sys_monoraw.sec, xts->sys_monoraw.nsec);
+		}
+
+		free(xts);
+	}
+
 	close(fd);
 	return 0;
 }