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PM / Suspend: Print wall time at suspend entry and exit

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Change-Id: I92f252414c013b018b9a392eae1ee039aa0e89dc
Signed-off-by: Todd Poynor <toddpoynor@google.com>
This commit is contained in:
Todd Poynor
2012-05-29 17:33:56 -07:00
parent 6411d5781d
commit 23016defd7
1 changed files with 15 additions and 0 deletions
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15
kernel/power/suspend.c
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@@ -24,6 +24,7 @@
#include <linux/export.h>
#include <linux/suspend.h>
#include <linux/syscore_ops.h>
#include <linux/rtc.h>
#include <trace/events/power.h>
#include "power.h"
@@ -300,6 +301,18 @@ 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.
@@ -314,6 +327,7 @@ 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++;
@@ -321,6 +335,7 @@ int pm_suspend(suspend_state_t state)
} else {
suspend_stats.success++;
}
pm_suspend_marker("exit");
return error;
}
EXPORT_SYMBOL(pm_suspend);