XADC_REG_VPVN
XADC_7S_CHAN_VOLTAGE(8, 11, XADC_REG_VPVN, NULL, false),
XADC_US_CHAN_VOLTAGE(8, 11, XADC_REG_VPVN, NULL, false),
ext_mux_chan = XADC_REG_VPVN;
chan->address = XADC_REG_VPVN;
return XADC_REG_VPVN;