4 - compatible : "axis,etraxfs-uart"
5 - reg: offset and length of the register set for the device.
6 - interrupts: device interrupt
9 - {dtr,dsr,ri,cd}-gpios: specify a GPIO for DTR/DSR/RI/CD
15 compatible = "axis,etraxfs-uart";
16 reg = <0xb0026000 0x1000>;