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* i.MX25 Real Time Clock controller

Required properties:
- compatible: should be: "fsl,imx25-rtc"
- reg: physical base address of the controller and length of memory mapped
  region.
- clocks: should contain the phandle for the rtc clock
- interrupts: rtc alarm interrupt

Optional properties:
- interrupts: dryice security violation interrupt (second entry)

Example:

rtc@53ffc000 {
	compatible = "fsl,imx25-rtc";
	reg = <0x53ffc000 0x4000>;
	clocks = <&clks 81>;
	interrupts = <25 56>;
};