1Dallas DS1307 and compatible RTC
2
3Required properties:
4- compatible: should be one of:
5	"dallas,ds1307",
6	"dallas,ds1308",
7	"dallas,ds1337",
8	"dallas,ds1338",
9	"dallas,ds1339",
10	"dallas,ds1388",
11	"dallas,ds1340",
12	"dallas,ds1341",
13	"maxim,ds3231",
14	"st,m41t0",
15	"st,m41t00",
16	"st,m41t11",
17	"microchip,mcp7940x",
18	"microchip,mcp7941x",
19	"pericom,pt7c4338",
20	"epson,rx8025",
21	"isil,isl12057"
22	"epson,rx8130"
23- reg: I2C bus address of the device
24
25Optional properties:
26- interrupts: rtc alarm interrupt.
27- clock-output-names: From common clock binding to override the default output
28                      clock name
29- wakeup-source: Enables wake up of host system on alarm
30- trickle-resistor-ohms : ds1339, ds1340 and ds 1388 only
31	Selected resistor for trickle charger
32	Possible values are 250, 2000, 4000
33	Should be given if trickle charger should be enabled
34- aux-voltage-chargeable: ds1339, ds1340, ds1388 and rx8130 only
35	Tells whether the battery/supercap of the RTC (if any) is
36	chargeable or not.
37	Possible values are 0 (not chargeable), 1 (chargeable)
38
39Deprecated properties:
40- trickle-diode-disable : ds1339, ds1340 and ds1388 only
41	Do not use internal trickle charger diode
42	Should be given if internal trickle charger diode should be disabled
43	(superseded by aux-voltage-chargeable)
44
45Example:
46	ds1339: rtc@68 {
47		compatible = "dallas,ds1339";
48		reg = <0x68>;
49		interrupt-parent = <&gpio4>;
50		interrupts = <20 0>;
51		trickle-resistor-ohms = <250>;
52	};
53