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Dallas DS1307 and compatible RTC
Required properties:
- compatible: should be one of:
"dallas,ds1307",
"dallas,ds1308",
"dallas,ds1337",
"dallas,ds1338",
"dallas,ds1339",
"dallas,ds1388",
"dallas,ds1340",
"dallas,ds1341",
"maxim,ds3231",
"st,m41t0",
"st,m41t00",
"st,m41t11",
"microchip,mcp7940x",
"microchip,mcp7941x",
"pericom,pt7c4338",
"epson,rx8025",
"isil,isl12057"
- reg: I2C bus address of the device
Optional properties:
- interrupts: rtc alarm interrupt.
- clock-output-names: From common clock binding to override the default output
clock name
- wakeup-source: Enables wake up of host system on alarm
- trickle-resistor-ohms : ds1339, ds1340 and ds 1388 only
Selected resistor for trickle charger
Possible values are 250, 2000, 4000
Should be given if trickle charger should be enabled
- trickle-diode-disable : ds1339, ds1340 and ds 1388 only
Do not use internal trickle charger diode
Should be given if internal trickle charger diode should be disabled
Example:
rtc1: ds1339@68 {
compatible = "dallas,ds1339";
reg = <0x68>;
interrupt-parent = <&gpio4>;
interrupts = <20 0>;
trickle-resistor-ohms = <250>;
};
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