vrc4172pwm_read
sc->sc_raw_freq = vrc4172pwm_read(sc, VRC2_PWM_LCDFREQ);
sc->sc_raw_duty = vrc4172pwm_read(sc, VRC2_PWM_LCDDUTY);
return (VRC2_PWM_LCDEN_MASK&vrc4172pwm_read(sc, VRC2_PWM_LCDDUTYEN));
en = vrc4172pwm_read(sc, VRC2_PWM_LCDDUTYEN);
freq = vrc4172pwm_read(sc, VRC2_PWM_LCDFREQ);
duty = vrc4172pwm_read(sc, VRC2_PWM_LCDDUTY);
static unsigned short vrc4172pwm_read(struct vrc4172pwm_softc *, int);