Re: [PATCH] ptp: measure the time offset between PHC and system clock
From: Sergei Shtylyov <hidden>
Date: 2013-09-14 19:21:47
Also in:
lkml
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 <redacted> --- Documentation/ptp/testptp.c | 40 ++++++++++++++++++++++++++++++++++++++-- 1 file changed, 38 insertions(+), 2 deletions(-)
quoted hunk ↗ jump to hunk
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
[...]
quoted hunk ↗ jump to hunk
@@ -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