PWM_CTL_USEF1
sc->sc_channels[0].ctlmask = PWM_CTL_MSEN1 | PWM_CTL_USEF1 |
if ((w & (PWM_CTL_USEF1|PWM_CTL_USEF2)) == 0 &&
(ctl & (PWM_CTL_USEF1|PWM_CTL_USEF2)) != 0)
#define PWM_CTL_USEF PWM_CTL_USEF1