@@ -147,10 +147,13 @@ 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"
+		" -a val     get extended timestamps with attributes (error_bound,\n"
+		"            clock_status, timescale, counter), up to %d samples\n"
 		" -X         get a ptp clock cross timestamp\n"
+		" -A         get a precise cross timestamp with attributes\n"
 		" -y val     pre/post tstamp timebase to use {realtime|monotonic|monotonic-raw}\n"
 		" -z         test combinations of rising/falling external time stamp flags\n",
-		progname, PTP_MAX_SAMPLES);
+		progname, PTP_MAX_SAMPLES, PTP_MAX_SAMPLES);
 }
 
 static void print_system_timestamp(int sample_num, __kernel_clockid_t clockid,

@@ -171,6 +174,8 @@ static void print_system_timestamp(int sample_num, __kernel_clockid_t clockid,
 		       sample_num, when, sec, nsec);
 		break;
 	default:
+		printf("sample #%2d: unknown clock %d %s: %lld.%09u\n",
+		       sample_num, clockid, when, sec, nsec);
 		break;
 	}
 }

@@ -188,6 +193,7 @@ int main(int argc, char *argv[])
 	struct ptp_sys_offset *sysoff;
 	struct ptp_sys_offset_extended *soe;
 	struct ptp_sys_offset_precise *xts;
+	struct ptp_sys_offset_attrs *attrs_data;
 
 	char *progname;
 	unsigned int i;

@@ -208,7 +214,9 @@ int main(int argc, char *argv[])
 	int list_pins = 0;
 	int pct_offset = 0;
 	int getextended = 0;
+	int getextendedattrs = 0;
 	int getcross = 0;
+	int getcrossattrs = 0;
 	int n_samples = 0;
 	int pin_index = -1, pin_func;
 	int pps = -1;

@@ -226,7 +234,8 @@ int main(int argc, char *argv[])
 
 	progname = strrchr(argv[0], '/');
 	progname = progname ? 1+progname : argv[0];
-	while (EOF != (c = getopt(argc, argv, "cd:e:E:f:F:ghH:i:k:lL:n:o:p:P:rsSt:T:w:x:Xy:z"))) {
+	while (EOF != (c = getopt(argc, argv,
+				  "a:Acd:e:E:f:F:ghH:i:k:lL:n:o:p:P:rsSt:T:w:x:Xy:z"))) {
 		switch (c) {
 		case 'c':
 			capabilities = 1;

@@ -311,9 +320,22 @@ int main(int argc, char *argv[])
 				return -1;
 			}
 			break;
+		case 'a':
+			getextendedattrs = atoi(optarg);
+			if (getextendedattrs < 1 ||
+			    getextendedattrs > PTP_MAX_SAMPLES) {
+				fprintf(stderr,
+					"number of extended attrs timestamp samples must be between 1 and %d; was asked for %d\n",
+					PTP_MAX_SAMPLES, getextendedattrs);
+				return -1;
+			}
+			break;
 		case 'X':
 			getcross = 1;
 			break;
+		case 'A':
+			getcrossattrs = 1;
+			break;
 		case 'y':
 			if (!strcasecmp(optarg, "realtime"))
 				ext_clockid = CLOCK_REALTIME;

@@ -367,6 +389,8 @@ int main(int argc, char *argv[])
 			       "  %d programmable pins\n"
 			       "  %d cross timestamping\n"
 			       "  %d adjust_phase\n"
+			       "  %d extended_attrs\n"
+			       "  %d precise_attrs\n"
 			       "  %d maximum phase adjustment (ns)\n",
 			       caps.max_adj,
 			       caps.n_alarm,

@@ -376,6 +400,8 @@ int main(int argc, char *argv[])
 			       caps.n_pins,
 			       caps.cross_timestamping,
 			       caps.adjust_phase,
+			       caps.extended_attrs,
+			       caps.precise_attrs,
 			       caps.max_phase_adj);
 		}
 	}

@@ -648,6 +674,49 @@ int main(int argc, char *argv[])
 		free(soe);
 	}
 
+	if (getextendedattrs) {
+		attrs_data = calloc(1, sizeof(*attrs_data) +
+				    getextendedattrs * sizeof(struct ptp_timestamp));
+		if (!attrs_data) {
+			perror("calloc");
+			return -1;
+		}
+
+		attrs_data->request.num_samples = getextendedattrs;
+		attrs_data->request.clock_id = ext_clockid;
+
+		if (ioctl(fd, PTP_SYS_OFFSET_EXTENDED_ATTRS, attrs_data)) {
+			perror("PTP_SYS_OFFSET_EXTENDED_ATTRS");
+		} else {
+			printf("extended attrs timestamp request returned %d samples\n",
+			       getextendedattrs);
+
+			for (i = 0; i < getextendedattrs; i++) {
+				struct ptp_timestamp *ts = &attrs_data->timestamps[i];
+
+				printf("  sample #%u:\n", i);
+				printf("    sys before: %lld ns\n",
+				       (long long)ts->pre_systime.sys_time);
+				printf("    phc time:   %lld.%09u\n",
+				       ts->devtime.device_time.sec,
+				       ts->devtime.device_time.nsec);
+				if (ts->devtime.attrs.valid & PTP_ATTRS_VALID_ERROR_BOUND)
+					printf("    error_bound: %u ns\n",
+					       ts->devtime.attrs.error_bound);
+				if (ts->devtime.attrs.valid & PTP_ATTRS_VALID_STATUS)
+					printf("    status: %u\n",
+					       ts->devtime.attrs.status);
+				if (ts->devtime.attrs.valid & PTP_ATTRS_VALID_TIMESCALE)
+					printf("    timescale: %u\n",
+					       ts->devtime.attrs.timescale);
+				printf("    sys after:  %lld ns\n",
+				       (long long)ts->post_systime.sys_time);
+			}
+		}
+
+		free(attrs_data);
+	}
+
 	if (getcross) {
 		xts = calloc(1, sizeof(*xts));
 		if (!xts) {

@@ -671,6 +740,44 @@ int main(int argc, char *argv[])
 		free(xts);
 	}
 
+	if (getcrossattrs) {
+		attrs_data = calloc(1, sizeof(*attrs_data) +
+				    sizeof(struct ptp_timestamp));
+		if (!attrs_data) {
+			perror("calloc");
+			return -1;
+		}
+
+		attrs_data->request.num_samples = 1;
+		attrs_data->request.clock_id = ext_clockid;
+
+		if (ioctl(fd, PTP_SYS_OFFSET_PRECISE_ATTRS, attrs_data)) {
+			perror("PTP_SYS_OFFSET_PRECISE_ATTRS");
+		} else {
+			struct ptp_timestamp *ts = &attrs_data->timestamps[0];
+
+			puts("precise attrs crosstimestamp request okay");
+			printf("device time: %lld.%09u\n",
+			       ts->devtime.device_time.sec,
+			       ts->devtime.device_time.nsec);
+			printf("system time: %lld ns\n",
+			       (long long)ts->systime.sys_time);
+			printf("raw time:    %lld ns\n",
+			       (long long)ts->systime.sys_rawtime);
+			if (ts->devtime.attrs.valid & PTP_ATTRS_VALID_ERROR_BOUND)
+				printf("error_bound: %u ns\n",
+				       ts->devtime.attrs.error_bound);
+			if (ts->devtime.attrs.valid & PTP_ATTRS_VALID_STATUS)
+				printf("status: %u\n",
+				       ts->devtime.attrs.status);
+			if (ts->devtime.attrs.valid & PTP_ATTRS_VALID_TIMESCALE)
+				printf("timescale: %u\n",
+				       ts->devtime.attrs.timescale);
+		}
+
+		free(attrs_data);
+	}
+
 	if (channel >= 0) {
 		if (ioctl(fd, PTP_MASK_CLEAR_ALL)) {
 			perror("PTP_MASK_CLEAR_ALL");