linux/Documentation/devicetree/bindings/gpio/gpio-twl4030.txt
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   1twl4030 GPIO controller bindings
   2
   3Required 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
  20Example:
  21
  22twl_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};
  30