Add an option to report REALTIME in RTC time format for
rtc_show_time() function.
Feature activated by CONFIG_RTC_SHOW_TIME_RTC.
Signed-off-by: Mark Salyzyn <salyzyn@xxxxxxxxxxx>
---
kernel/time/Kconfig | 17 +++++++++++++++++
kernel/time/rtc_show_time.c | 12 ++++++++++++
2 files changed, 29 insertions(+)
diff --git a/kernel/time/Kconfig b/kernel/time/Kconfig
index 2dc891056635..3c2920b8825c 100644
--- a/kernel/time/Kconfig
+++ b/kernel/time/Kconfig
@@ -221,4 +221,21 @@ choice
continues, and the timestamps help re-orient post-analysis.
Print boottime <s>.<ns> timestamp in rtc_show_time
+ config RTC_SHOW_TIME_RTC
+ bool "realtime in wall clock format"
+ select RTC_SHOW_TIME
+ select RTC_LIB
+ help
+ Activate optional rtc_show_time(const char *msg) wall clock
+ time instrumentation.
+
+ The primary use of the instrumentation is to aid field
+ analysis of Battery and Power usage. The instrumentation
+ may also help triage and synchronize kernel logs and user
+ space activity logs at key displacements. For instance
+ CLOCK_MONOTONIC stops while suspended, while CLOCK_REALTIME
+ continues, and the timestamps help re-orient post-analysis.
+
+ Print realtime YYYY-MM-DD hh:mm:ss.<ns> timestamp in
+ rtc_show_time.
endchoice
diff --git a/kernel/time/rtc_show_time.c b/kernel/time/rtc_show_time.c
index 6c7b8ae6be0c..d861a30aef77 100644
--- a/kernel/time/rtc_show_time.c
+++ b/kernel/time/rtc_show_time.c
@@ -24,9 +24,21 @@ void rtc_show_time(const char *prefix_msg)
struct timespec64 ts;
getnstimeofday64(&ts);
+#if defined(CONFIG_RTC_SHOW_TIME_RTC)
+ {
+ struct rtc_time tm;
+
+ rtc_time64_to_tm(ts.tv_sec, &tm);
+ pr_info("%s %d-%02d-%02d %02d:%02d:%02d.%09lu UTC\n",
+ prefix_msg ? prefix_msg : "Time:",
+ tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
+ tm.tm_hour, tm.tm_min, tm.tm_sec, ts.tv_nsec);
+ }
+#else
pr_info("%s %lu.%09lu UTC\n",
prefix_msg ? prefix_msg : "Time:", ts.tv_sec, ts.tv_nsec);
#endif
+#endif
}
EXPORT_SYMBOL(rtc_show_time);
--
2.14.0.rc0.284.gd933b75aa4-goog
