linux/Documentation/devicetree/bindings/rtc/spear-rtc.txt
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   1* SPEAr RTC
   2
   3Required properties:
   4- compatible : "st,spear600-rtc"
   5- reg : Address range of the rtc registers
   6- interrupt-parent: Should be the phandle for the interrupt controller
   7  that services interrupts for this device
   8- interrupt: Should contain the rtc interrupt number
   9
  10Example:
  11
  12        rtc@fc000000 {
  13                compatible = "st,spear600-rtc";
  14                reg = <0xfc000000 0x1000>;
  15                interrupt-parent = <&vic1>;
  16                interrupts = <12>;
  17        };
  18