gpio-74x164.txt

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    1 * Generic 8-bits shift register GPIO driver
    2 
    3 Required properties:
    4 - compatible: Should contain one of the following:
    5     "fairchild,74hc595"
    6     "nxp,74lvc594"
    7 - reg : chip select number
    8 - gpio-controller : Marks the device node as a gpio controller.
    9 - #gpio-cells : Should be two.  The first cell is the pin number and
   10   the second cell is used to specify the gpio polarity:
   11       0 = active high
   12       1 = active low
   13 - registers-number: Number of daisy-chained shift registers
   14 
   15 Optional properties:
   16 - enable-gpios: GPIO connected to the OE (Output Enable) pin.
   17 
   18 Example:
   19 
   20 gpio5: gpio5@0 {
   21         compatible = "fairchild,74hc595";
   22         reg = <0>;
   23         gpio-controller;
   24         #gpio-cells = <2>;
   25         registers-number = <4>;
   26         spi-max-frequency = <100000>;
   27 };

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/gpio/gpio-74x164.txt

FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/gpio/gpio-74x164.txt