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| author | Rafael J. Wysocki <rjw@sisk.pl> | 2012-04-30 00:53:32 +0400 |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2012-05-01 23:25:49 +0400 |
| commit | 55850945e872531644f31fefd217d61dd15dcab8 (patch) | |
| tree | 412ee1338d0b69e4d6e2a5e518e30e6660704921 /drivers/base/power/sysfs.c | |
| parent | 7483b4a4d9abf9dcf1ffe6e805ead2847ec3264e (diff) | |
| download | linux-55850945e872531644f31fefd217d61dd15dcab8.tar.xz | |
PM / Sleep: Add "prevent autosleep time" statistics to wakeup sources
Android uses one wakelock statistics that is only necessary for
opportunistic sleep. Namely, the prevent_suspend_time field
accumulates the total time the given wakelock has been locked
while "automatic suspend" was enabled. Add an analogous field,
prevent_sleep_time, to wakeup sources and make it behave in a similar
way.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/base/power/sysfs.c')
| -rw-r--r-- | drivers/base/power/sysfs.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c index 13e40b9021b9..48be2ad4dd2c 100644 --- a/drivers/base/power/sysfs.c +++ b/drivers/base/power/sysfs.c @@ -417,6 +417,27 @@ static ssize_t wakeup_last_time_show(struct device *dev, } static DEVICE_ATTR(wakeup_last_time_ms, 0444, wakeup_last_time_show, NULL); + +#ifdef CONFIG_PM_AUTOSLEEP +static ssize_t wakeup_prevent_sleep_time_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + s64 msec = 0; + bool enabled = false; + + spin_lock_irq(&dev->power.lock); + if (dev->power.wakeup) { + msec = ktime_to_ms(dev->power.wakeup->prevent_sleep_time); + enabled = true; + } + spin_unlock_irq(&dev->power.lock); + return enabled ? sprintf(buf, "%lld\n", msec) : sprintf(buf, "\n"); +} + +static DEVICE_ATTR(wakeup_prevent_sleep_time_ms, 0444, + wakeup_prevent_sleep_time_show, NULL); +#endif /* CONFIG_PM_AUTOSLEEP */ #endif /* CONFIG_PM_SLEEP */ #ifdef CONFIG_PM_ADVANCED_DEBUG @@ -511,6 +532,9 @@ static struct attribute *wakeup_attrs[] = { &dev_attr_wakeup_total_time_ms.attr, &dev_attr_wakeup_max_time_ms.attr, &dev_attr_wakeup_last_time_ms.attr, +#ifdef CONFIG_PM_AUTOSLEEP + &dev_attr_wakeup_prevent_sleep_time_ms.attr, +#endif #endif NULL, }; |