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/nintendo,hollywood-gpio.txt

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    1 Nintendo Wii (Hollywood) GPIO controller
    2 
    3 Required properties:
    4 - compatible: "nintendo,hollywood-gpio"
    5 - reg: Physical base address and length of the controller's registers.
    6 - gpio-controller: Marks the device node as a GPIO controller.
    7 - #gpio-cells: Should be <2>. The first cell is the pin number and the
    8   second cell is used to specify optional parameters:
    9    - bit 0 specifies polarity (0 for normal, 1 for inverted).
   10 
   11 Optional properties:
   12 - ngpios: see Documentation/devicetree/bindings/gpio/gpio.txt
   13 - interrupt-controller: Marks the device node as an interrupt controller.
   14 - #interrupt-cells: Should be two.
   15 - interrupts: Interrupt specifier for the controller's Broadway (PowerPC)
   16   interrupt.
   17 
   18 Example:
   19 
   20         GPIO: gpio@d8000c0 {
   21                 #gpio-cells = <2>;
   22                 compatible = "nintendo,hollywood-gpio";
   23                 reg = <0x0d8000c0 0x40>;
   24                 gpio-controller;
   25                 ngpios = <24>;
   26         }

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