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/ni,169445-nand-gpio.txt

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    1 Bindings for the National Instruments 169445 GPIO NAND controller
    2 
    3 The 169445 GPIO NAND controller has two memory mapped GPIO registers, one
    4 for input (the ready signal) and one for output (control signals).  It is
    5 intended to be used with the GPIO NAND driver.
    6 
    7 Required properties:
    8         - compatible: should be "ni,169445-nand-gpio"
    9         - reg-names: must contain
   10                 "dat" - data register
   11         - reg: address + size pairs describing the GPIO register sets;
   12                 order must correspond with the order of entries in reg-names
   13         - #gpio-cells: must be set to 2. The first cell is the pin number and
   14                         the second cell is used to specify the gpio polarity:
   15                         0 = active high
   16                         1 = active low
   17         - gpio-controller: Marks the device node as a gpio controller.
   18 
   19 Optional properties:
   20         - no-output: disables driving output on the pins
   21 
   22 Examples:
   23         gpio1: nand-gpio-out@1f300010 {
   24                 compatible = "ni,169445-nand-gpio";
   25                 reg = <0x1f300010 0x4>;
   26                 reg-names = "dat";
   27                 gpio-controller;
   28                 #gpio-cells = <2>;
   29         };
   30 
   31         gpio2: nand-gpio-in@1f300014 {
   32                 compatible = "ni,169445-nand-gpio";
   33                 reg = <0x1f300014 0x4>;
   34                 reg-names = "dat";
   35                 gpio-controller;
   36                 #gpio-cells = <2>;
   37                 no-output;
   38         };

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