CMS_IREG_FREQ_CTL
reg = CMS_READ(sc, chip, CMS_IREG_FREQ_CTL);
CMS_WRITE(sc, chip, CMS_IREG_FREQ_CTL, reg);
reg = CMS_READ(sc, chip, CMS_IREG_FREQ_CTL);
CMS_WRITE(sc, chip, CMS_IREG_FREQ_CTL, reg);
CMS_WRITE(sc, 0, CMS_IREG_FREQ_CTL, 0x00);
CMS_WRITE(sc, 1, CMS_IREG_FREQ_CTL, 0x00);