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author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-04 11:14:36 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-04 11:14:36 -0700 |
commit | f46e9913faeebcb6bd29edf795f12b60acbff171 (patch) | |
tree | 1ed8871d0ebd638094d27317de1d8a53712ae15a /drivers/base/power/sysfs.c | |
parent | 8d91530c5fd7f0b1e8c4ddfea2905e55a178569b (diff) | |
parent | 8d4b9d1bfef117862a2889dec4dac227068544c9 (diff) | |
download | linux-f46e9913faeebcb6bd29edf795f12b60acbff171.tar.bz2 |
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:
PM / Runtime: Add runtime PM statistics (v3)
PM / Runtime: Make runtime_status attribute not debug-only (v. 2)
PM: Do not use dynamically allocated objects in pm_wakeup_event()
PM / Suspend: Fix ordering of calls in suspend error paths
PM / Hibernate: Fix snapshot error code path
PM / Hibernate: Fix hibernation_platform_enter()
pm_qos: Get rid of the allocation in pm_qos_add_request()
pm_qos: Reimplement using plists
plist: Add plist_last
PM: Make it possible to avoid races between wakeup and system sleep
PNPACPI: Add support for remote wakeup
PM: describe kernel policy regarding wakeup defaults (v. 2)
PM / Hibernate: Fix typos in comments in kernel/power/swap.c
Diffstat (limited to 'drivers/base/power/sysfs.c')
-rw-r--r-- | drivers/base/power/sysfs.c | 98 |
1 files changed, 78 insertions, 20 deletions
diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c index a4c33bc51257..e56b4388fe61 100644 --- 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" /* @@ -73,6 +74,8 @@ * device are known to the PM core. However, for some devices this * 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. + * + * wakeup_count - Report the number of wakeup events related to the device */ static const char enabled[] = "enabled"; @@ -108,6 +111,65 @@ 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) +{ + 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 @@ -144,6 +206,16 @@ wake_store(struct device * dev, struct device_attribute *attr, static DEVICE_ATTR(wakeup, 0644, wake_show, wake_store); +#ifdef CONFIG_PM_SLEEP +static ssize_t wakeup_count_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return sprintf(buf, "%lu\n", dev->power.wakeup_count); +} + +static DEVICE_ATTR(wakeup_count, 0444, wakeup_count_show, NULL); +#endif + #ifdef CONFIG_PM_ADVANCED_DEBUG #ifdef CONFIG_PM_RUNTIME @@ -172,27 +244,8 @@ 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 @@ -228,14 +281,19 @@ 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, + &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, +#endif #ifdef CONFIG_PM_ADVANCED_DEBUG &dev_attr_async.attr, #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 |