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-nmk.txt

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    1 Nomadik GPIO controller
    2 
    3 Required properties:
    4 - compatible            : Should be "st,nomadik-gpio".
    5 - reg                   : Physical base address and length of the controller's registers.
    6 - interrupts            : The interrupt outputs from the controller.
    7 - #gpio-cells           : Should be two:
    8                             The first cell is the pin number.
    9                             The second cell is used to specify optional parameters:
   10                               - bits[3:0] trigger type and level flags:
   11                                   1 = low-to-high edge triggered.
   12                                   2 = high-to-low edge triggered.
   13                                   4 = active high level-sensitive.
   14                                   8 = active low level-sensitive.
   15 - gpio-controller       : Marks the device node as a GPIO controller.
   16 - interrupt-controller  : Marks the device node as an interrupt controller.
   17 - gpio-bank             : Specifies which bank a controller owns.
   18 - st,supports-sleepmode : Specifies whether controller can sleep or not
   19 
   20 Example:
   21 
   22                 gpio1: gpio@8012e080 {
   23                         compatible = "st,nomadik-gpio";
   24                         reg =  <0x8012e080 0x80>;
   25                         interrupts = <0 120 0x4>;
   26                         #gpio-cells = <2>;
   27                         gpio-controller;
   28                         interrupt-controller;
   29                         st,supports-sleepmode;
   30                         gpio-bank = <1>;
   31                 };

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