[PATCH 6.1 085/280] selftests/ptp: Add -X option for testing PTP_SYS_OFFSET_PRECISE

Greg Kroah-Hartman
2026-02-04T15:10:21Z

From: Alex Maftei <alex.maftei@amd.com>

[ Upstream commit 3cf119ad5dc2b5c11385106d6d0ba86fbb47324c ]

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>
Stable-dep-of: 76868642e427 ("testptp: Add option to open PHC in readonly mode")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
tools/testing/selftests/ptp/testptp.c | 31 ++++++++++++++++++++++++++-
1 file changed, 30 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/ptp/testptp.c b/tools/testing/selftests/ptp/testptp.c
index 2db6ff0316e7a..863699434296a 100644
--- a/tools/testing/selftests/ptp/testptp.c
+++ b/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;
@@ -573,6 +579,29 @@ 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;
}
--
2.51.0