linux/Documentation/devicetree/bindings/rtc/pxa-rtc.txt
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Prefs
   1* PXA RTC
   2
   3PXA specific RTC driver.
   4
   5Required properties:
   6- compatible : Should be "marvell,pxa-rtc"
   7
   8Examples:
   9
  10rtc@40900000 {
  11        compatible = "marvell,pxa-rtc";
  12        reg = <0x40900000 0x3c>;
  13        interrupts = <30 31>;
  14};
  15