FAN_AMBIENT
tp->fan_todo[FAN_AMBIENT] = FAN_FULLBLAST;
tp->fan_todo[FAN_AMBIENT] = FAN_SAME;
tp->fan_todo[FAN_AMBIENT] = FAN_SLOWER;
tp->fan_todo[FAN_AMBIENT] = FAN_FASTER;
tp->fan_todo[FAN_AMBIENT] = FAN_SAME;
enum fan_action decision = prioritize_fan_action(FAN_AMBIENT);
tp->fan_todo[FAN_AMBIENT] = FAN_SAME;