1 * Energymicro efm32 UART
4 - compatible : Should be "efm32,uart"
5 - reg : Address and length of the register set
6 - interrupts : Should contain uart interrupt
9 - location : Decides the location of the USART I/O pins.
10 Allowed range : [0 .. 5]
16 compatible = "efm32,uart";
17 reg = <0x4000c400 0x400>;