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/gpio/gpio-ts4800.txt

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    1 * TS-4800 FPGA's GPIO controller bindings
    2 
    3 Required properties:
    4 - compatible: Must be "technologic,ts4800-gpio".
    5 - #gpio-cells: Should be two. The first cell is the pin number.
    6 - reg: Physical base address of the controller and length
    7        of memory mapped region.
    8 
    9 Optional property:
   10 - ngpios: See "gpio.txt"
   11 
   12 Example:
   13 
   14 gpio1: gpio {
   15         compatible = "technologic,ts4800-gpio";
   16         reg = <0x10020 0x6>;
   17         ngpios = <8>;
   18         gpio-controller;
   19         #gpio-cells = <2>;
   20 };

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