CONFIG

CONFIG_APM

Sent to notify a driver of a power management event. The driver should determine the type of event and take appropriate action.

Return CR_SUCCESS. On a request for permission, return CR_SUCCESS to grant permission, CR_FAILURE to deny it.

scfSubFunc

APM subfunction number. Can be one of these values:

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.