Hello.
On 09/14/2013 12:03 PM, Dong Zhu wrote:
This patch add a method into testptp.c to measure the time offset
between phc and system clock through the ioctl PTP_SYS_OFFSET.
Signed-off-by: Dong Zhu <bluezhudong@xxxxxxxxx>
---
Documentation/ptp/testptp.c | 40 ++++++++++++++++++++++++++++++++++++++--
1 file changed, 38 insertions(+), 2 deletions(-)
diff --git a/Documentation/ptp/testptp.c b/Documentation/ptp/testptp.c
index f59ded0..72bb030 100644
--- a/Documentation/ptp/testptp.c
+++ b/Documentation/ptp/testptp.c
[...]
@@ -376,6 +387,31 @@ int main(int argc, char *argv[])
}
}
+ if (offset) {
+ sysoff = calloc(1, sizeof(*sysoff));
+ if (!sysoff) {
+ perror("calloc");
+ return -1;
+ }
+ sysoff->n_samples = n_samples;
+
+ if (ioctl(fd, PTP_SYS_OFFSET, sysoff))
+ perror("PTP_SYS_OFFSET");
+ else
+ puts("time offset between PHC and
+ system clock request okay");
Don't break the string constant that way, there'll be all spaces between
"and" and "system" included in it. Do it like this:
puts("time offset between PHC and "
"system clock request okay");
WBR, Sergei
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