FEAT_OLD_AUTOPWM
.features = FEAT_OLD_AUTOPWM | FEAT_FANCTL_ONOFF,
.features = FEAT_OLD_AUTOPWM | FEAT_VID | FEAT_FANCTL_ONOFF,
data->features &= ~FEAT_OLD_AUTOPWM;
data->features &= ~FEAT_OLD_AUTOPWM;
#define has_old_autopwm(data) ((data)->features & FEAT_OLD_AUTOPWM)