xadc_write_adc_reg
ret = xadc_write_adc_reg(xadc, XADC_REG_CONF0, conf0);
ret = xadc_write_adc_reg(xadc, XADC_REG_INPUT_MODE(0), bipolar_mask);
ret = xadc_write_adc_reg(xadc, XADC_REG_INPUT_MODE(1),
ret = xadc_write_adc_reg(xadc, XADC_REG_SEQ(0), scan_mask & 0xffff);
ret = xadc_write_adc_reg(xadc, XADC_REG_SEQ(1), scan_mask >> 16);
ret = xadc_write_adc_reg(xadc, XADC_REG_SEQ(0), scan_mask & 0xffff);
ret = xadc_write_adc_reg(xadc, XADC_REG_SEQ(1), scan_mask >> 16);