diff options
| author | Todd Poynor <toddpoynor@google.com> | 2012-05-29 17:33:56 -0700 |
|---|---|---|
| committer | Arve Hjønnevåg <arve@android.com> | 2013-04-29 14:42:54 -0700 |
| commit | aaab799fed66d1bd349038fdaab6effd592e7d70 (patch) | |
| tree | 2327eb34de828c4520450fe685b4244a8661d881 /kernel | |
| parent | 27146c4e997b7851c5476d3f8c0b6945a504815f (diff) | |
PM / Suspend: Print wall time at suspend entry and exit
Change-Id: I92f252414c013b018b9a392eae1ee039aa0e89dc
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/power/suspend.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c index d4feda084a3..947175af798 100644 --- a/kernel/power/suspend.c +++ b/kernel/power/suspend.c @@ -25,6 +25,7 @@ #include <linux/suspend.h> #include <linux/syscore_ops.h> #include <linux/ftrace.h> +#include <linux/rtc.h> #include <trace/events/power.h> #include "power.h" @@ -346,6 +347,18 @@ static int enter_state(suspend_state_t state) return error; } +static void pm_suspend_marker(char *annotation) +{ + struct timespec ts; + struct rtc_time tm; + + getnstimeofday(&ts); + rtc_time_to_tm(ts.tv_sec, &tm); + pr_info("PM: suspend %s %d-%02d-%02d %02d:%02d:%02d.%09lu UTC\n", + annotation, tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, + tm.tm_hour, tm.tm_min, tm.tm_sec, ts.tv_nsec); +} + /** * pm_suspend - Externally visible function for suspending the system. * @state: System sleep state to enter. @@ -360,6 +373,7 @@ int pm_suspend(suspend_state_t state) if (state <= PM_SUSPEND_ON || state >= PM_SUSPEND_MAX) return -EINVAL; + pm_suspend_marker("entry"); error = enter_state(state); if (error) { suspend_stats.fail++; @@ -367,6 +381,7 @@ int pm_suspend(suspend_state_t state) } else { suspend_stats.success++; } + pm_suspend_marker("exit"); return error; } EXPORT_SYMBOL(pm_suspend); |