EcWaitEvent
acpi_status status = EcWaitEvent(sc, EC_EVENT_INPUT_BUFFER_EMPTY, 0);
status = EcWaitEvent(sc, event, generationCount);
status = EcWaitEvent(sc, EC_EVENT_OUTPUT_BUFFER_FULL, generationCount);
status = EcWaitEvent(sc, EC_EVENT_INPUT_BUFFER_EMPTY, generationCount);
status = EcWaitEvent(sc, EC_EVENT_INPUT_BUFFER_EMPTY, generationCount);
static acpi_status EcWaitEvent(struct acpi_ec_cookie *sc, EC_EVENT event,