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/abracon,abx80x.txt

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    1 Abracon ABX80X I2C ultra low power RTC/Alarm chip
    2 
    3 The Abracon ABX80X family consist of the ab0801, ab0803, ab0804, ab0805, ab1801,
    4 ab1803, ab1804 and ab1805. The ab0805 is the superset of ab080x and the ab1805
    5 is the superset of ab180x.
    6 
    7 Required properties:
    8 
    9  - "compatible": should one of:
   10         "abracon,abx80x"
   11         "abracon,ab0801"
   12         "abracon,ab0803"
   13         "abracon,ab0804"
   14         "abracon,ab0805"
   15         "abracon,ab1801"
   16         "abracon,ab1803"
   17         "abracon,ab1804"
   18         "abracon,ab1805"
   19         "microcrystal,rv1805"
   20         Using "abracon,abx80x" will enable chip autodetection.
   21  - "reg": I2C bus address of the device
   22 
   23 Optional properties:
   24 
   25 The abx804 and abx805 have a trickle charger that is able to charge the
   26 connected battery or supercap. Both the following properties have to be defined
   27 and valid to enable charging:
   28 
   29  - "abracon,tc-diode": should be "standard" (0.6V) or "schottky" (0.3V)
   30  - "abracon,tc-resistor": should be <0>, <3>, <6> or <11>. 0 disables the output
   31                           resistor, the other values are in kOhm.

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