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| author | Alan Stern <stern@rowland.harvard.edu> | 2010-07-08 00:05:37 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2010-07-19 02:00:36 +0200 |
| commit | 0fcb4eef8294492c8f1de8236b1ed81f09e42922 (patch) | |
| tree | 23c96ecfc5a85c1870d85c5db9421b6c09763fa8 /drivers/base | |
| parent | 4eb241e5691363c391aac8a5051d0d013188ec84 (diff) | |
| download | kernel_samsung_smdk4412-0fcb4eef8294492c8f1de8236b1ed81f09e42922.tar.gz kernel_samsung_smdk4412-0fcb4eef8294492c8f1de8236b1ed81f09e42922.tar.bz2 kernel_samsung_smdk4412-0fcb4eef8294492c8f1de8236b1ed81f09e42922.zip | |
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.c | 53 |
1 files changed, 33 insertions, 20 deletions
diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c index 81d344e0e95..1eca50c8e7c 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 |