intel,ixp4xx-gpio.txt

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    1 Intel IXP4xx XScale Networking Processors GPIO
    2 
    3 This GPIO controller is found in the Intel IXP4xx processors.
    4 It supports 16 GPIO lines.
    5 
    6 The interrupt portions of the GPIO controller is hierarchical:
    7 the synchronous edge detector is part of the GPIO block, but the
    8 actual enabling/disabling of the interrupt line is done in the
    9 main IXP4xx interrupt controller which has a 1:1 mapping for
   10 the first 12 GPIO lines to 12 system interrupts.
   11 
   12 The remaining 4 GPIO lines can not be used for receiving
   13 interrupts.
   14 
   15 The interrupt parent of this GPIO controller must be the
   16 IXP4xx interrupt controller.
   17 
   18 Required properties:
   19 
   20 - compatible : Should be
   21   "intel,ixp4xx-gpio"
   22 - reg : Should contain registers location and length
   23 - gpio-controller : marks this as a GPIO controller
   24 - #gpio-cells : Should be 2, see gpio/gpio.txt
   25 - interrupt-controller : marks this as an interrupt controller
   26 - #interrupt-cells : a standard two-cell interrupt, see
   27   interrupt-controller/interrupts.txt
   28 
   29 Example:
   30 
   31 gpio0: gpio@c8004000 {
   32         compatible = "intel,ixp4xx-gpio";
   33         reg = <0xc8004000 0x1000>;
   34         gpio-controller;
   35         #gpio-cells = <2>;
   36         interrupt-controller;
   37         #interrupt-cells = <2>;
   38 };

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/gpio/intel,ixp4xx-gpio.txt

FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/gpio/intel,ixp4xx-gpio.txt