Sent to notify a driver of a power management event. The driver should determine the type of event and take appropriate action.
CONFIG_APM_TEST_STANDBY | Request for permission to change to standby operation. |
CONFIG_APM_TEST_SUSPEND | Request for permission to change to suspend operation. |
CONFIG_APM_TEST_STANDBY_FAILED | Standby request denied. |
CONFIG_APM_TEST_SUSPEND_FAILED | Suspend request denied. |
CONFIG_APM_TEST_STANDBY_SUCCEEDED | Standby request granted. |
CONFIG_APM_TEST_SUSPEND_SUCCEEDED | Suspend request granted. |
CONFIG_APM_RESUME_STANDBY | Standby operation resuming. |
CONFIG_APM_RESUME_SUSPEND | Suspend operation resuming. |
CONFIG_APM_RESUME_CRITICAL | Critical operation resuming. |
In standby operation, all devices remain generally responsive although in a lower power state. In suspend operation, you should assume that power and state of the device may be lost.