Take double precision floating point representation of an offset value in
seconds. Feed this value to the PHC's phase control keyword.
Signed-off-by: Rahul Rameshbabu <rrameshb...@nvidia.com>
---
phc_ctl.8 | 4 ++++
phc_ctl.c | 55 ++++++++++++++++++++++++++++++++++++++++++++++++-------
2 files changed, 52 insertions(+), 7 deletions(-)
diff --git a/phc_ctl.8 b/phc_ctl.8
index 650e661..b10566e 100644
--- a/phc_ctl.8
+++ b/phc_ctl.8
@@ -62,6 +62,10 @@ Adjust the frequency of the PHC clock by the specified parts
per billion. If no
argument is provided, it will attempt to read the current frequency and report
it.
.TP
+.BI phase " seconds"
+Pass an amount in seconds to the PHC clock's phase control keyword. This
+argument is required.
+.TP
.BI cmp
Compare the PHC clock device to CLOCK_REALTIME, using the best method
available.
.TP
diff --git a/phc_ctl.c b/phc_ctl.c
index db89f01..c5430d8 100644
--- a/phc_ctl.c
+++ b/phc_ctl.c
@@ -106,13 +106,14 @@ static void usage(const char *progname)
" specify commands with arguments. Can specify multiple\n"
" commands to be executed in order. Seconds are read as\n"
" double precision floating point values.\n"
- " set [seconds] set PHC time (defaults to time on
CLOCK_REALTIME)\n"
- " get get PHC time\n"
- " adj <seconds> adjust PHC time by offset\n"
- " freq [ppb] adjust PHC frequency (default returns
current offset)\n"
- " cmp compare PHC offset to CLOCK_REALTIME\n"
- " caps display device capabilities (default if no
command given)\n"
- " wait <seconds> pause between commands\n"
+ " set [seconds] set PHC time (defaults to time on
CLOCK_REALTIME)\n"
+ " get get PHC time\n"
+ " adj <seconds> adjust PHC time by offset\n"
+ " freq [ppb] adjust PHC frequency (default returns
current offset)\n"
+ " phase <seconds> pass offset to PHC phase control keyword\n"
+ " cmp compare PHC offset to CLOCK_REALTIME\n"
+ " caps display device capabilities (default if no
command given)\n"
+ " wait <seconds> pause between commands\n"
"\n",
progname);
}
@@ -277,6 +278,45 @@ static int do_freq(clockid_t clkid, int cmdc, char *cmdv[])
return 1;
}
+static int do_phase(clockid_t clkid, int cmdc, char *cmdv[])
+{
+ double offset_arg;
+ long nsecs;
+ enum parser_result r;
+
+ if (cmdc < 1 || name_is_a_command(cmdv[0])) {
+ pr_err("phase: missing required time argument");
+ return -2;
+ }
+
+ /* parse the double time offset argument */
+ r = get_ranged_double(cmdv[0], &offset_arg, -DBL_MAX, DBL_MAX);
+ switch (r) {
+ case PARSED_OK:
+ break;
+ case MALFORMED:
+ pr_err("phase: '%s' is not a valid double", cmdv[0]);
+ return -2;
+ case OUT_OF_RANGE:
+ pr_err("phase: '%s' is out of range.", cmdv[0]);
+ return -2;
+ default:
+ pr_err("phase: couldn't process '%s'", cmdv[0]);
+ return -2;
+ }
+
+ nsecs = (long)(NSEC_PER_SEC * offset_arg);
+
+ clockadj_init(clkid);
+ clockadj_set_phase(clkid, nsecs);
+
+ pr_notice("offset of %lf seconds provided to PHC phase control keyword",
+ offset_arg);
+
+ /* phase offset always consumes one argument */
+ return 1;
+}
+
static int do_caps(clockid_t clkid, int cmdc, char *cmdv[])
{
struct ptp_clock_caps caps;
@@ -399,6 +439,7 @@ static const struct cmd_t all_commands[] = {
{ "get", &do_get },
{ "adj", &do_adj },
{ "freq", &do_freq },
+ { "phase", &do_phase },
{ "cmp", &do_cmp },
{ "caps", &do_caps },
{ "wait", &do_wait },
--
2.40.1
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