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authorAlan Stern <stern@rowland.harvard.edu>2010-07-08 00:05:37 +0200
committerRafael J. Wysocki <rjw@sisk.pl>2010-07-19 02:00:36 +0200
commit0fcb4eef8294492c8f1de8236b1ed81f09e42922 (patch)
tree23c96ecfc5a85c1870d85c5db9421b6c09763fa8 /drivers/base
parent4eb241e5691363c391aac8a5051d0d013188ec84 (diff)
downloadop-kernel-dev-0fcb4eef8294492c8f1de8236b1ed81f09e42922.zip
op-kernel-dev-0fcb4eef8294492c8f1de8236b1ed81f09e42922.tar.gz
PM / Runtime: Make runtime_status attribute not debug-only (v. 2)
This patch (as1404b) makes the runtime_status sysfs attribute available even in the absence of CONFIG_PM_ADVANCED_DEBUG, and it changes the routine to display "unsupported" when runtime PM is disabled for a device. Although not strictly 100% accurate, this will almost always be correct. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Acked-by: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'drivers/base')
-rw-r--r--drivers/base/power/sysfs.c53
1 files changed, 33 insertions, 20 deletions
diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c
index 81d344e..1eca50c 100644
--- a/drivers/base/power/sysfs.c
+++ b/drivers/base/power/sysfs.c
@@ -110,6 +110,38 @@ 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_status_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ const char *p;
+
+ if (dev->power.runtime_error) {
+ p = "error\n";
+ } else if (dev->power.disable_depth) {
+ p = "unsupported\n";
+ } else {
+ switch (dev->power.runtime_status) {
+ case RPM_SUSPENDED:
+ p = "suspended\n";
+ break;
+ case RPM_SUSPENDING:
+ p = "suspending\n";
+ break;
+ case RPM_RESUMING:
+ p = "resuming\n";
+ break;
+ case RPM_ACTIVE:
+ p = "active\n";
+ break;
+ default:
+ return -EIO;
+ }
+ }
+ return sprintf(buf, p);
+}
+
+static DEVICE_ATTR(runtime_status, 0444, rtpm_status_show, NULL);
#endif
static ssize_t
@@ -184,27 +216,8 @@ static ssize_t rtpm_enabled_show(struct device *dev,
return sprintf(buf, "enabled\n");
}
-static ssize_t rtpm_status_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- if (dev->power.runtime_error)
- return sprintf(buf, "error\n");
- switch (dev->power.runtime_status) {
- case RPM_SUSPENDED:
- return sprintf(buf, "suspended\n");
- case RPM_SUSPENDING:
- return sprintf(buf, "suspending\n");
- case RPM_RESUMING:
- return sprintf(buf, "resuming\n");
- case RPM_ACTIVE:
- return sprintf(buf, "active\n");
- }
- return -EIO;
-}
-
static DEVICE_ATTR(runtime_usage, 0444, rtpm_usagecount_show, NULL);
static DEVICE_ATTR(runtime_active_kids, 0444, rtpm_children_show, NULL);
-static DEVICE_ATTR(runtime_status, 0444, rtpm_status_show, NULL);
static DEVICE_ATTR(runtime_enabled, 0444, rtpm_enabled_show, NULL);
#endif
@@ -240,6 +253,7 @@ static DEVICE_ATTR(async, 0644, async_show, async_store);
static struct attribute * power_attrs[] = {
#ifdef CONFIG_PM_RUNTIME
&dev_attr_control.attr,
+ &dev_attr_runtime_status.attr,
#endif
&dev_attr_wakeup.attr,
#ifdef CONFIG_PM_SLEEP
@@ -250,7 +264,6 @@ static struct attribute * power_attrs[] = {
#ifdef CONFIG_PM_RUNTIME
&dev_attr_runtime_usage.attr,
&dev_attr_runtime_active_kids.attr,
- &dev_attr_runtime_status.attr,
&dev_attr_runtime_enabled.attr,
#endif
#endif
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