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* Dallas DS1339		I2C Serial Real-Time Clock

Required properties:
- compatible: Should contain "dallas,ds1339".
- reg: I2C address for chip

Optional properties:
- trickle-resistor-ohms : Selected resistor for trickle charger
	Values usable for ds1339 are 250, 2000, 4000
	Should be given if trickle charger should be enabled
- trickle-diode-disable : Do not use internal trickle charger diode
	Should be given if internal trickle charger diode should be disabled
Example:
	ds1339: rtc@68 {
		compatible = "dallas,ds1339";
		trickle-resistor-ohms = <250>;
		reg = <0x68>;
	};