The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/rtc/rtc-ds1307.txt

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    1 Dallas DS1307 and compatible RTC
    2 
    3 Required 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 
   25 Optional 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 
   39 Deprecated 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   43         (superseded by aux-voltage-chargeable)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 
   45 Example:
   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         };

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