#include <linux/cpufreq.h>
#include <linux/cpuidle.h>
#include <linux/timer.h>
+#include <linux/wakeup_reason.h>
#include "../base.h"
#include "power.h"
{
pr_debug("PM: Adding info for %s:%s\n",
dev->bus ? dev->bus->name : "No Bus", dev_name(dev));
+ device_pm_check_callbacks(dev);
mutex_lock(&dpm_list_mtx);
if (dev->parent && dev->parent->power.is_prepared)
dev_warn(dev, "parent %s should not be sleeping\n",
mutex_unlock(&dpm_list_mtx);
device_wakeup_disable(dev);
pm_runtime_remove(dev);
+ device_pm_check_callbacks(dev);
}
/**
list_move_tail(&dev->power.entry, &dpm_list);
}
-static ktime_t initcall_debug_start(struct device *dev)
+static ktime_t initcall_debug_start(struct device *dev, void *cb)
{
ktime_t calltime = ktime_set(0, 0);
if (pm_print_times_enabled) {
- pr_info("calling %s+ @ %i, parent: %s\n",
+ pr_info("calling %s+ @ %i, parent: %s, cb: %pf\n",
dev_name(dev), task_pid_nr(current),
- dev->parent ? dev_name(dev->parent) : "none");
+ dev->parent ? dev_name(dev->parent) : "none", cb);
calltime = ktime_get();
}
if (!cb)
return 0;
- calltime = initcall_debug_start(dev);
+ calltime = initcall_debug_start(dev, cb);
pm_dev_dbg(dev, state, info);
trace_device_pm_callback_start(dev, info, state.event);
TRACE_DEVICE(dev);
TRACE_SUSPEND(0);
+ dpm_wait_for_children(dev, async);
+
if (async_error)
goto Complete;
if (dev->power.syscore || dev->power.direct_complete)
goto Complete;
- dpm_wait_for_children(dev, async);
-
if (dev->pm_domain) {
info = "noirq power domain ";
callback = pm_noirq_op(&dev->pm_domain->ops, state);
__pm_runtime_disable(dev, false);
+ dpm_wait_for_children(dev, async);
+
if (async_error)
goto Complete;
if (dev->power.syscore || dev->power.direct_complete)
goto Complete;
- dpm_wait_for_children(dev, async);
-
if (dev->pm_domain) {
info = "late power domain ";
callback = pm_late_early_op(&dev->pm_domain->ops, state);
int error;
ktime_t calltime;
- calltime = initcall_debug_start(dev);
+ calltime = initcall_debug_start(dev, cb);
trace_device_pm_callback_start(dev, info, state.event);
error = cb(dev, state);
pm_callback_t callback = NULL;
char *info = NULL;
int error = 0;
+ char suspend_abort[MAX_SUSPEND_ABORT_LEN];
DECLARE_DPM_WATCHDOG_ON_STACK(wd);
TRACE_DEVICE(dev);
pm_wakeup_event(dev, 0);
if (pm_wakeup_pending()) {
+ pm_get_active_wakeup_sources(suspend_abort,
+ MAX_SUSPEND_ABORT_LEN);
+ log_suspend_abort_reason(suspend_abort);
async_error = -EBUSY;
goto Complete;
}
dev->power.wakeup_path = device_may_wakeup(dev);
+ if (dev->power.no_pm_callbacks) {
+ ret = 1; /* Let device go direct_complete */
+ goto unlock;
+ }
+
if (dev->pm_domain) {
info = "preparing power domain ";
callback = dev->pm_domain->ops.prepare;
if (callback)
ret = callback(dev);
+unlock:
device_unlock(dev);
if (ret < 0) {
device_pm_unlock();
}
EXPORT_SYMBOL_GPL(dpm_for_each_dev);
+
+static bool pm_ops_is_empty(const struct dev_pm_ops *ops)
+{
+ if (!ops)
+ return true;
+
+ return !ops->prepare &&
+ !ops->suspend &&
+ !ops->suspend_late &&
+ !ops->suspend_noirq &&
+ !ops->resume_noirq &&
+ !ops->resume_early &&
+ !ops->resume &&
+ !ops->complete;
+}
+
+void device_pm_check_callbacks(struct device *dev)
+{
+ spin_lock_irq(&dev->power.lock);
+ dev->power.no_pm_callbacks =
+ (!dev->bus || pm_ops_is_empty(dev->bus->pm)) &&
+ (!dev->class || pm_ops_is_empty(dev->class->pm)) &&
+ (!dev->type || pm_ops_is_empty(dev->type->pm)) &&
+ (!dev->pm_domain || pm_ops_is_empty(&dev->pm_domain->ops)) &&
+ (!dev->driver || pm_ops_is_empty(dev->driver->pm));
+ spin_unlock_irq(&dev->power.lock);
+}