Device Drivers Power Management

dpm_resume_start — Execute noirq and early device callbacks.
dpm_resume_end — Execute resume callbacks and complete system transition.
dpm_suspend_end — Execute late and noirq device suspend callbacks.
dpm_suspend_start — Prepare devices for PM transition and suspend them.
device_pm_wait_for_dev — Wait for suspend/resume of a device to complete.
dpm_for_each_dev — device iterator.