linux/Documentation/devicetree/bindings/tty/serial/via,vt8500-uart.txt
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   1VIA/Wondermedia VT8500 UART Controller
   2-----------------------------------------------------
   3
   4Required properties:
   5- compatible : "via,vt8500-uart"
   6- reg : Should contain 1 register ranges(address and length)
   7- interrupts : UART interrupt
   8- clocks : phandle to the uart source clock (usually a 24Mhz fixed clock)
   9
  10Example:
  11
  12        uart@d8210000 {
  13                compatible = "via,vt8500-uart";
  14                reg = <0xd8210000 0x1040>;
  15                interrupts = <47>;
  16                clocks = <&ref24>;
  17        };
  18