PM / Runtime: Add runtime PM statistics (v3)

[mirror_ubuntu-artful-kernel.git] / drivers / base / power / sysfs.c

diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c
index 1eca50c8e7ca36dab412e1c455c245022d1ee1da..e56b4388fe61004a1f85e0209cbc59bd60f4d1fb 100644 (file)
--- a/drivers/base/power/sysfs.c
+++ b/drivers/base/power/sysfs.c
@@ -6,6 +6,7 @@
 #include <linux/string.h>
 #include <linux/pm_runtime.h>
 #include <asm/atomic.h>
+#include <linux/jiffies.h>
 #include "power.h"
 
 /*
@@ -111,6 +112,33 @@ static ssize_t control_store(struct device * dev, struct device_attribute *attr,
 
 static DEVICE_ATTR(control, 0644, control_show, control_store);
 
+static ssize_t rtpm_active_time_show(struct device *dev,
+                               struct device_attribute *attr, char *buf)
+{
+       int ret;
+       spin_lock_irq(&dev->power.lock);
+       update_pm_runtime_accounting(dev);
+       ret = sprintf(buf, "%i\n", jiffies_to_msecs(dev->power.active_jiffies));
+       spin_unlock_irq(&dev->power.lock);
+       return ret;
+}
+
+static DEVICE_ATTR(runtime_active_time, 0444, rtpm_active_time_show, NULL);
+
+static ssize_t rtpm_suspended_time_show(struct device *dev,
+                               struct device_attribute *attr, char *buf)
+{
+       int ret;
+       spin_lock_irq(&dev->power.lock);
+       update_pm_runtime_accounting(dev);
+       ret = sprintf(buf, "%i\n",
+               jiffies_to_msecs(dev->power.suspended_jiffies));
+       spin_unlock_irq(&dev->power.lock);
+       return ret;
+}
+
+static DEVICE_ATTR(runtime_suspended_time, 0444, rtpm_suspended_time_show, NULL);
+
 static ssize_t rtpm_status_show(struct device *dev,
                                struct device_attribute *attr, char *buf)
 {
@@ -254,6 +282,8 @@ static struct attribute * power_attrs[] = {
 #ifdef CONFIG_PM_RUNTIME
        &dev_attr_control.attr,
        &dev_attr_runtime_status.attr,
+       &dev_attr_runtime_suspended_time.attr,
+       &dev_attr_runtime_active_time.attr,
 #endif
        &dev_attr_wakeup.attr,
 #ifdef CONFIG_PM_SLEEP