diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/base/power/sysfs.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/base/power/sysfs.c | 634 |
1 files changed, 0 insertions, 634 deletions
diff --git a/ANDROID_3.4.5/drivers/base/power/sysfs.c b/ANDROID_3.4.5/drivers/base/power/sysfs.c deleted file mode 100644 index 48be2ad4..00000000 --- a/ANDROID_3.4.5/drivers/base/power/sysfs.c +++ /dev/null @@ -1,634 +0,0 @@ -/* - * drivers/base/power/sysfs.c - sysfs entries for device PM - */ - -#include <linux/device.h> -#include <linux/string.h> -#include <linux/export.h> -#include <linux/pm_qos.h> -#include <linux/pm_runtime.h> -#include <linux/atomic.h> -#include <linux/jiffies.h> -#include "power.h" - -/* - * control - Report/change current runtime PM setting of the device - * - * Runtime power management of a device can be blocked with the help of - * this attribute. All devices have one of the following two values for - * the power/control file: - * - * + "auto\n" to allow the device to be power managed at run time; - * + "on\n" to prevent the device from being power managed at run time; - * - * The default for all devices is "auto", which means that devices may be - * subject to automatic power management, depending on their drivers. - * Changing this attribute to "on" prevents the driver from power managing - * the device at run time. Doing that while the device is suspended causes - * it to be woken up. - * - * wakeup - Report/change current wakeup option for device - * - * Some devices support "wakeup" events, which are hardware signals - * used to activate devices from suspended or low power states. Such - * devices have one of three values for the sysfs power/wakeup file: - * - * + "enabled\n" to issue the events; - * + "disabled\n" not to do so; or - * + "\n" for temporary or permanent inability to issue wakeup. - * - * (For example, unconfigured USB devices can't issue wakeups.) - * - * Familiar examples of devices that can issue wakeup events include - * keyboards and mice (both PS2 and USB styles), power buttons, modems, - * "Wake-On-LAN" Ethernet links, GPIO lines, and more. Some events - * will wake the entire system from a suspend state; others may just - * wake up the device (if the system as a whole is already active). - * Some wakeup events use normal IRQ lines; other use special out - * of band signaling. - * - * It is the responsibility of device drivers to enable (or disable) - * wakeup signaling as part of changing device power states, respecting - * the policy choices provided through the driver model. - * - * Devices may not be able to generate wakeup events from all power - * states. Also, the events may be ignored in some configurations; - * for example, they might need help from other devices that aren't - * active, or which may have wakeup disabled. Some drivers rely on - * wakeup events internally (unless they are disabled), keeping - * their hardware in low power modes whenever they're unused. This - * saves runtime power, without requiring system-wide sleep states. - * - * async - Report/change current async suspend setting for the device - * - * Asynchronous suspend and resume of the device during system-wide power - * state transitions can be enabled by writing "enabled" to this file. - * Analogously, if "disabled" is written to this file, the device will be - * suspended and resumed synchronously. - * - * All devices have one of the following two values for power/async: - * - * + "enabled\n" to permit the asynchronous suspend/resume of the device; - * + "disabled\n" to forbid it; - * - * NOTE: It generally is unsafe to permit the asynchronous suspend/resume - * of a device unless it is certain that all of the PM dependencies of the - * 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. - * - * 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"; - -static ssize_t control_show(struct device *dev, struct device_attribute *attr, - char *buf) -{ - return sprintf(buf, "%s\n", - dev->power.runtime_auto ? ctrl_auto : ctrl_on); -} - -static ssize_t control_store(struct device * dev, struct device_attribute *attr, - const char * buf, size_t n) -{ - char *cp; - int len = n; - - cp = memchr(buf, '\n', n); - if (cp) - len = cp - buf; - device_lock(dev); - if (len == sizeof ctrl_auto - 1 && strncmp(buf, ctrl_auto, len) == 0) - pm_runtime_allow(dev); - else if (len == sizeof ctrl_on - 1 && strncmp(buf, ctrl_on, len) == 0) - pm_runtime_forbid(dev); - else - n = -EINVAL; - device_unlock(dev); - return n; -} - -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); - -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; - - device_lock(dev); - pm_runtime_set_autosuspend_delay(dev, delay); - device_unlock(dev); - return n; -} - -static DEVICE_ATTR(autosuspend_delay_ms, 0644, autosuspend_delay_ms_show, - autosuspend_delay_ms_store); - -static ssize_t pm_qos_latency_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - return sprintf(buf, "%d\n", dev->power.pq_req->node.prio); -} - -static ssize_t pm_qos_latency_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t n) -{ - s32 value; - int ret; - - if (kstrtos32(buf, 0, &value)) - return -EINVAL; - - if (value < 0) - return -EINVAL; - - ret = dev_pm_qos_update_request(dev->power.pq_req, value); - return ret < 0 ? ret : n; -} - -static DEVICE_ATTR(pm_qos_resume_latency_us, 0644, - pm_qos_latency_show, pm_qos_latency_store); -#endif /* CONFIG_PM_RUNTIME */ - -#ifdef CONFIG_PM_SLEEP -static ssize_t -wake_show(struct device * dev, struct device_attribute *attr, char * buf) -{ - return sprintf(buf, "%s\n", device_can_wakeup(dev) - ? (device_may_wakeup(dev) ? enabled : disabled) - : ""); -} - -static ssize_t -wake_store(struct device * dev, struct device_attribute *attr, - const char * buf, size_t n) -{ - char *cp; - int len = n; - - if (!device_can_wakeup(dev)) - return -EINVAL; - - cp = memchr(buf, '\n', n); - if (cp) - len = cp - buf; - if (len == sizeof enabled - 1 - && strncmp(buf, enabled, sizeof enabled - 1) == 0) - device_set_wakeup_enable(dev, 1); - else if (len == sizeof disabled - 1 - && strncmp(buf, disabled, sizeof disabled - 1) == 0) - device_set_wakeup_enable(dev, 0); - else - return -EINVAL; - return n; -} - -static DEVICE_ATTR(wakeup, 0644, wake_show, wake_store); - -static ssize_t wakeup_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->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); - -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_abort_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->wakeup_count; - enabled = true; - } - spin_unlock_irq(&dev->power.lock); - return enabled ? sprintf(buf, "%lu\n", count) : sprintf(buf, "\n"); -} - -static DEVICE_ATTR(wakeup_abort_count, 0444, wakeup_abort_count_show, NULL); - -static ssize_t wakeup_expire_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->expire_count; - enabled = true; - } - spin_unlock_irq(&dev->power.lock); - return enabled ? sprintf(buf, "%lu\n", count) : sprintf(buf, "\n"); -} - -static DEVICE_ATTR(wakeup_expire_count, 0444, wakeup_expire_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); - -#ifdef CONFIG_PM_AUTOSLEEP -static ssize_t wakeup_prevent_sleep_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->prevent_sleep_time); - enabled = true; - } - spin_unlock_irq(&dev->power.lock); - return enabled ? sprintf(buf, "%lld\n", msec) : sprintf(buf, "\n"); -} - -static DEVICE_ATTR(wakeup_prevent_sleep_time_ms, 0444, - wakeup_prevent_sleep_time_show, NULL); -#endif /* CONFIG_PM_AUTOSLEEP */ -#endif /* CONFIG_PM_SLEEP */ - -#ifdef CONFIG_PM_ADVANCED_DEBUG -#ifdef CONFIG_PM_RUNTIME - -static ssize_t rtpm_usagecount_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - return sprintf(buf, "%d\n", atomic_read(&dev->power.usage_count)); -} - -static ssize_t rtpm_children_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - return sprintf(buf, "%d\n", dev->power.ignore_children ? - 0 : atomic_read(&dev->power.child_count)); -} - -static ssize_t rtpm_enabled_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - if ((dev->power.disable_depth) && (dev->power.runtime_auto == false)) - return sprintf(buf, "disabled & forbidden\n"); - else if (dev->power.disable_depth) - return sprintf(buf, "disabled\n"); - else if (dev->power.runtime_auto == false) - return sprintf(buf, "forbidden\n"); - return sprintf(buf, "enabled\n"); -} - -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_enabled, 0444, rtpm_enabled_show, NULL); - -#endif - -static ssize_t async_show(struct device *dev, struct device_attribute *attr, - char *buf) -{ - return sprintf(buf, "%s\n", - device_async_suspend_enabled(dev) ? enabled : disabled); -} - -static ssize_t async_store(struct device *dev, struct device_attribute *attr, - const char *buf, size_t n) -{ - char *cp; - int len = n; - - cp = memchr(buf, '\n', n); - if (cp) - len = cp - buf; - if (len == sizeof enabled - 1 && strncmp(buf, enabled, len) == 0) - device_enable_async_suspend(dev); - else if (len == sizeof disabled - 1 && strncmp(buf, disabled, len) == 0) - device_disable_async_suspend(dev); - else - return -EINVAL; - return n; -} - -static DEVICE_ATTR(async, 0644, async_show, async_store); -#endif /* CONFIG_PM_ADVANCED_DEBUG */ - -static struct attribute *power_attrs[] = { -#ifdef CONFIG_PM_ADVANCED_DEBUG -#ifdef CONFIG_PM_SLEEP - &dev_attr_async.attr, -#endif -#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, -#endif -#endif /* CONFIG_PM_ADVANCED_DEBUG */ - NULL, -}; -static struct attribute_group pm_attr_group = { - .name = power_group_name, - .attrs = power_attrs, -}; - -static struct attribute *wakeup_attrs[] = { -#ifdef CONFIG_PM_SLEEP - &dev_attr_wakeup.attr, - &dev_attr_wakeup_count.attr, - &dev_attr_wakeup_active_count.attr, - &dev_attr_wakeup_abort_count.attr, - &dev_attr_wakeup_expire_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, -#ifdef CONFIG_PM_AUTOSLEEP - &dev_attr_wakeup_prevent_sleep_time_ms.attr, -#endif -#endif - NULL, -}; -static struct attribute_group pm_wakeup_attr_group = { - .name = power_group_name, - .attrs = wakeup_attrs, -}; - -static struct attribute *runtime_attrs[] = { -#ifdef CONFIG_PM_RUNTIME -#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, -#endif /* CONFIG_PM_RUNTIME */ - NULL, -}; -static struct attribute_group pm_runtime_attr_group = { - .name = power_group_name, - .attrs = runtime_attrs, -}; - -static struct attribute *pm_qos_attrs[] = { -#ifdef CONFIG_PM_RUNTIME - &dev_attr_pm_qos_resume_latency_us.attr, -#endif /* CONFIG_PM_RUNTIME */ - NULL, -}; -static struct attribute_group pm_qos_attr_group = { - .name = power_group_name, - .attrs = pm_qos_attrs, -}; - -int dpm_sysfs_add(struct device *dev) -{ - int rc; - - rc = sysfs_create_group(&dev->kobj, &pm_attr_group); - if (rc) - return rc; - - if (pm_runtime_callbacks_present(dev)) { - rc = sysfs_merge_group(&dev->kobj, &pm_runtime_attr_group); - if (rc) - goto err_out; - } - - if (device_can_wakeup(dev)) { - rc = sysfs_merge_group(&dev->kobj, &pm_wakeup_attr_group); - if (rc) { - if (pm_runtime_callbacks_present(dev)) - sysfs_unmerge_group(&dev->kobj, - &pm_runtime_attr_group); - goto err_out; - } - } - return 0; - - err_out: - sysfs_remove_group(&dev->kobj, &pm_attr_group); - return rc; -} - -int wakeup_sysfs_add(struct device *dev) -{ - return sysfs_merge_group(&dev->kobj, &pm_wakeup_attr_group); -} - -void wakeup_sysfs_remove(struct device *dev) -{ - sysfs_unmerge_group(&dev->kobj, &pm_wakeup_attr_group); -} - -int pm_qos_sysfs_add(struct device *dev) -{ - return sysfs_merge_group(&dev->kobj, &pm_qos_attr_group); -} - -void pm_qos_sysfs_remove(struct device *dev) -{ - sysfs_unmerge_group(&dev->kobj, &pm_qos_attr_group); -} - -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_unmerge_group(&dev->kobj, &pm_wakeup_attr_group); - sysfs_remove_group(&dev->kobj, &pm_attr_group); -} |