FAN_CTRL_MODE
fanmode &= ~(3 << FAN_CTRL_MODE(nr));
fanmode |= (3 << FAN_CTRL_MODE(nr));
fanmode |= (3 << FAN_CTRL_MODE(nr));
fanmode |= (1 << FAN_CTRL_MODE(nr));
switch ((mode >> FAN_CTRL_MODE(nr)) & 3) {