REG_FIFO0
yvals[i] = titsc_readl(ts_dev, REG_FIFO0);
*z1 = titsc_readl(ts_dev, REG_FIFO0);
*z2 = titsc_readl(ts_dev, REG_FIFO0);
xvals[i] = titsc_readl(ts_dev, REG_FIFO0);