Helpful for post-mortem analysis to synchronize CLOCK_MONOTONIC kernel logs with CLOCK_REALTIME user space logs. Post-mortem analysis for Battery and Power diagnosis. Improved reporting of suspension times against the rtc wallclock, which is persistent even at the lowest power management states. analyze_suspend.py requires a configured kernel to debug, these prints can remain in a field product with CONFIG_RTC_TIME_SHOW. Signed-off-by: Mark Salyzyn <salyzyn@xxxxxxxxxxx> v2: - move implementation to kernel timekeeping from rtc_lib files - use rtc_time64_to_tm() instead of rtc_time_to_tm() - use inline in include/linux/rtc.h for !CONFIG_RTC_SHOW_TIME - use late_initcall to ensure rtc_lib driver(s) are loaded --- include/linux/rtc.h | 5 ++ kernel/power/hibernate.c | 4 +- kernel/power/suspend.c | 3 + kernel/time/Kconfig | 11 +++++ kernel/time/Makefile | 1 kernel/time/rtc_show_time.c | 82 ++++++++++++++++++++++++++++++++++++++++++++ 6 files changed, 105 insertions(+), 1 deletion(-)
