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-twl4030.txt

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    1 twl4030 GPIO controller bindings
    2 
    3 Required properties:
    4 - compatible:
    5   - "ti,twl4030-gpio" for twl4030 GPIO controller
    6 - #gpio-cells : Should be two.
    7   - first cell is the pin number
    8   - second cell is used to specify optional parameters (unused)
    9 - gpio-controller : Marks the device node as a GPIO controller.
   10 - #interrupt-cells : Should be 2.
   11 - interrupt-controller: Mark the device node as an interrupt controller
   12   The first cell is the GPIO number.
   13   The second cell is not used.
   14 - ti,use-leds : Enables LEDA and LEDB outputs if set
   15 - ti,debounce : if n-th bit is set, debounces GPIO-n
   16 - ti,mmc-cd : if n-th bit is set, GPIO-n controls VMMC(n+1)
   17 - ti,pullups : if n-th bit is set, set a pullup on GPIO-n
   18 - ti,pulldowns : if n-th bit is set, set a pulldown on GPIO-n
   19 
   20 Example:
   21 
   22 twl_gpio: gpio {
   23     compatible = "ti,twl4030-gpio";
   24     #gpio-cells = <2>;
   25     gpio-controller;
   26     #interrupt-cells = <2>;
   27     interrupt-controller;
   28     ti,use-leds;
   29 };

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