diff options
Diffstat (limited to 'kernel/power/main.c')
| -rw-r--r-- | kernel/power/main.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/kernel/power/main.c b/kernel/power/main.c index b58800b21fc0..bfb684a4d412 100644 --- a/kernel/power/main.c +++ b/kernel/power/main.c @@ -229,11 +229,47 @@ pm_trace_store(struct kobject *kobj, struct kobj_attribute *attr, power_attr(pm_trace); #endif /* CONFIG_PM_TRACE */ +#ifdef CONFIG_SUSPEND_DEVICE_TIME_DEBUG +/* + * threshold of device suspend time consumption in microsecond(0.5ms), the + * driver suspend/resume time longer than this threshold will be + * print to console, 0 to disable */ +int device_suspend_time_threshold; + +static ssize_t +device_suspend_time_threshold_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + if (device_suspend_time_threshold == 0) + return sprintf(buf, "off\n"); + else + return sprintf(buf, "%d usecs\n", + device_suspend_time_threshold); +} + +static ssize_t +device_suspend_time_threshold_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t n) +{ + int val; + if (sscanf(buf, "%d", &val) > 0) { + device_suspend_time_threshold = val; + return n; + } + return -EINVAL; +} +power_attr(device_suspend_time_threshold); +#endif + static struct attribute * g[] = { &state_attr.attr, #ifdef CONFIG_PM_TRACE &pm_trace_attr.attr, #endif +#ifdef CONFIG_SUSPEND_DEVICE_TIME_DEBUG + &device_suspend_time_threshold_attr.attr, +#endif #ifdef CONFIG_PM_SLEEP &pm_async_attr.attr, #ifdef CONFIG_PM_DEBUG |