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authorLinus Torvalds <torvalds@linux-foundation.org>2010-10-21 14:53:17 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-10-21 14:53:17 -0700
commita8cbf22559ceefdcdfac00701e8e6da7518b7e8e (patch)
tree63ebd5779a37f809f7daed77dbf27aa3f1e1110c /drivers/base/power/sysfs.c
parente36f561a2c88394ef2708f1ab300fe8a79e9f651 (diff)
parent9c034392533f3e9f00656d5c58478cff2560ef81 (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6: (26 commits) PM / Wakeup: Show wakeup sources statistics in debugfs PM: Introduce library for device-specific OPPs (v7) PM: Add sysfs attr for rechecking dev hash from PM trace PM: Lock PM device list mutex in show_dev_hash() PM / Runtime: Remove idle notification after failing suspend PM / Hibernate: Modify signature used to mark swap PM / Runtime: Reduce code duplication in core helper functions PM: Allow wakeup events to abort freezing of tasks PM: runtime: add missed pm_request_autosuspend PM / Hibernate: Make some boot messages look less scary PM / Runtime: Implement autosuspend support PM / Runtime: Add no_callbacks flag PM / Runtime: Combine runtime PM entry points PM / Runtime: Merge synchronous and async runtime routines PM / Runtime: Replace boolean arguments with bitflags PM / Runtime: Move code in drivers/base/power/runtime.c sysfs: Add sysfs_merge_group() and sysfs_unmerge_group() PM: Fix potential issue with failing asynchronous suspend PM / Wakeup: Introduce wakeup source objects and event statistics (v3) PM: Fix signed/unsigned warning in dpm_show_time() ...
Diffstat (limited to 'drivers/base/power/sysfs.c')
-rw-r--r--drivers/base/power/sysfs.c217
1 files changed, 208 insertions, 9 deletions
diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c
index e56b4388fe6..0b1e46bf3e5 100644
--- a/drivers/base/power/sysfs.c
+++ b/drivers/base/power/sysfs.c
@@ -75,12 +75,27 @@
* attribute is set to "enabled" by bus type code or device drivers and in
* that cases it should be safe to leave the default value.
*
+ * autosuspend_delay_ms - Report/change a device's autosuspend_delay value
+ *
+ * Some drivers don't want to carry out a runtime suspend as soon as a
+ * device becomes idle; they want it always to remain idle for some period
+ * of time before suspending it. This period is the autosuspend_delay
+ * value (expressed in milliseconds) and it can be controlled by the user.
+ * If the value is negative then the device will never be runtime
+ * suspended.
+ *
+ * NOTE: The autosuspend_delay_ms attribute and the autosuspend_delay
+ * value are used only if the driver calls pm_runtime_use_autosuspend().
+ *
* wakeup_count - Report the number of wakeup events related to the device
*/
static const char enabled[] = "enabled";
static const char disabled[] = "disabled";
+const char power_group_name[] = "power";
+EXPORT_SYMBOL_GPL(power_group_name);
+
#ifdef CONFIG_PM_RUNTIME
static const char ctrl_auto[] = "auto";
static const char ctrl_on[] = "on";
@@ -170,6 +185,33 @@ static ssize_t rtpm_status_show(struct device *dev,
}
static DEVICE_ATTR(runtime_status, 0444, rtpm_status_show, NULL);
+
+static ssize_t autosuspend_delay_ms_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ if (!dev->power.use_autosuspend)
+ return -EIO;
+ return sprintf(buf, "%d\n", dev->power.autosuspend_delay);
+}
+
+static ssize_t autosuspend_delay_ms_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t n)
+{
+ long delay;
+
+ if (!dev->power.use_autosuspend)
+ return -EIO;
+
+ if (strict_strtol(buf, 10, &delay) != 0 || delay != (int) delay)
+ return -EINVAL;
+
+ pm_runtime_set_autosuspend_delay(dev, delay);
+ return n;
+}
+
+static DEVICE_ATTR(autosuspend_delay_ms, 0644, autosuspend_delay_ms_show,
+ autosuspend_delay_ms_store);
+
#endif
static ssize_t
@@ -210,11 +252,122 @@ static DEVICE_ATTR(wakeup, 0644, wake_show, wake_store);
static ssize_t wakeup_count_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "%lu\n", dev->power.wakeup_count);
+ unsigned long count = 0;
+ bool enabled = false;
+
+ spin_lock_irq(&dev->power.lock);
+ if (dev->power.wakeup) {
+ count = dev->power.wakeup->event_count;
+ enabled = true;
+ }
+ spin_unlock_irq(&dev->power.lock);
+ return enabled ? sprintf(buf, "%lu\n", count) : sprintf(buf, "\n");
}
static DEVICE_ATTR(wakeup_count, 0444, wakeup_count_show, NULL);
-#endif
+
+static ssize_t wakeup_active_count_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ unsigned long count = 0;
+ bool enabled = false;
+
+ spin_lock_irq(&dev->power.lock);
+ if (dev->power.wakeup) {
+ count = dev->power.wakeup->active_count;
+ enabled = true;
+ }
+ spin_unlock_irq(&dev->power.lock);
+ return enabled ? sprintf(buf, "%lu\n", count) : sprintf(buf, "\n");
+}
+
+static DEVICE_ATTR(wakeup_active_count, 0444, wakeup_active_count_show, NULL);
+
+static ssize_t wakeup_hit_count_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ unsigned long count = 0;
+ bool enabled = false;
+
+ spin_lock_irq(&dev->power.lock);
+ if (dev->power.wakeup) {
+ count = dev->power.wakeup->hit_count;
+ enabled = true;
+ }
+ spin_unlock_irq(&dev->power.lock);
+ return enabled ? sprintf(buf, "%lu\n", count) : sprintf(buf, "\n");
+}
+
+static DEVICE_ATTR(wakeup_hit_count, 0444, wakeup_hit_count_show, NULL);
+
+static ssize_t wakeup_active_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ unsigned int active = 0;
+ bool enabled = false;
+
+ spin_lock_irq(&dev->power.lock);
+ if (dev->power.wakeup) {
+ active = dev->power.wakeup->active;
+ enabled = true;
+ }
+ spin_unlock_irq(&dev->power.lock);
+ return enabled ? sprintf(buf, "%u\n", active) : sprintf(buf, "\n");
+}
+
+static DEVICE_ATTR(wakeup_active, 0444, wakeup_active_show, NULL);
+
+static ssize_t wakeup_total_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->total_time);
+ enabled = true;
+ }
+ spin_unlock_irq(&dev->power.lock);
+ return enabled ? sprintf(buf, "%lld\n", msec) : sprintf(buf, "\n");
+}
+
+static DEVICE_ATTR(wakeup_total_time_ms, 0444, wakeup_total_time_show, NULL);
+
+static ssize_t wakeup_max_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->max_time);
+ enabled = true;
+ }
+ spin_unlock_irq(&dev->power.lock);
+ return enabled ? sprintf(buf, "%lld\n", msec) : sprintf(buf, "\n");
+}
+
+static DEVICE_ATTR(wakeup_max_time_ms, 0444, wakeup_max_time_show, NULL);
+
+static ssize_t wakeup_last_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->last_time);
+ enabled = true;
+ }
+ spin_unlock_irq(&dev->power.lock);
+ return enabled ? sprintf(buf, "%lld\n", msec) : sprintf(buf, "\n");
+}
+
+static DEVICE_ATTR(wakeup_last_time_ms, 0444, wakeup_last_time_show, NULL);
+#endif /* CONFIG_PM_SLEEP */
#ifdef CONFIG_PM_ADVANCED_DEBUG
#ifdef CONFIG_PM_RUNTIME
@@ -279,19 +432,20 @@ static DEVICE_ATTR(async, 0644, async_show, async_store);
#endif /* CONFIG_PM_ADVANCED_DEBUG */
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
&dev_attr_wakeup_count.attr,
+ &dev_attr_wakeup_active_count.attr,
+ &dev_attr_wakeup_hit_count.attr,
+ &dev_attr_wakeup_active.attr,
+ &dev_attr_wakeup_total_time_ms.attr,
+ &dev_attr_wakeup_max_time_ms.attr,
+ &dev_attr_wakeup_last_time_ms.attr,
#endif
#ifdef CONFIG_PM_ADVANCED_DEBUG
&dev_attr_async.attr,
#ifdef CONFIG_PM_RUNTIME
+ &dev_attr_runtime_status.attr,
&dev_attr_runtime_usage.attr,
&dev_attr_runtime_active_kids.attr,
&dev_attr_runtime_enabled.attr,
@@ -300,10 +454,53 @@ static struct attribute * power_attrs[] = {
NULL,
};
static struct attribute_group pm_attr_group = {
- .name = "power",
+ .name = power_group_name,
.attrs = power_attrs,
};
+#ifdef CONFIG_PM_RUNTIME
+
+static struct attribute *runtime_attrs[] = {
+#ifndef CONFIG_PM_ADVANCED_DEBUG
+ &dev_attr_runtime_status.attr,
+#endif
+ &dev_attr_control.attr,
+ &dev_attr_runtime_suspended_time.attr,
+ &dev_attr_runtime_active_time.attr,
+ &dev_attr_autosuspend_delay_ms.attr,
+ NULL,
+};
+static struct attribute_group pm_runtime_attr_group = {
+ .name = power_group_name,
+ .attrs = runtime_attrs,
+};
+
+int dpm_sysfs_add(struct device *dev)
+{
+ int rc;
+
+ rc = sysfs_create_group(&dev->kobj, &pm_attr_group);
+ if (rc == 0 && !dev->power.no_callbacks) {
+ rc = sysfs_merge_group(&dev->kobj, &pm_runtime_attr_group);
+ if (rc)
+ sysfs_remove_group(&dev->kobj, &pm_attr_group);
+ }
+ return rc;
+}
+
+void rpm_sysfs_remove(struct device *dev)
+{
+ sysfs_unmerge_group(&dev->kobj, &pm_runtime_attr_group);
+}
+
+void dpm_sysfs_remove(struct device *dev)
+{
+ rpm_sysfs_remove(dev);
+ sysfs_remove_group(&dev->kobj, &pm_attr_group);
+}
+
+#else /* CONFIG_PM_RUNTIME */
+
int dpm_sysfs_add(struct device * dev)
{
return sysfs_create_group(&dev->kobj, &pm_attr_group);
@@ -313,3 +510,5 @@ void dpm_sysfs_remove(struct device * dev)
{
sysfs_remove_group(&dev->kobj, &pm_attr_group);
}
+
+#endif