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-max77620.txt

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    1 GPIO driver for MAX77620 Power management IC from Maxim Semiconductor.
    2 
    3 Device has 8 GPIO pins which can be configured as GPIO as well as the
    4 special IO functions.
    5 
    6 Required properties:
    7 -------------------
    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 For more details, please refer generic GPIO DT binding document
   14 <devicetree/bindings/gpio/gpio.txt>.
   15 
   16 Example:
   17 --------
   18 #include <dt-bindings/mfd/max77620.h>
   19 ...
   20 max77620@3c {
   21         compatible = "maxim,max77620";
   22 
   23         gpio-controller;
   24         #gpio-cells = <2>;
   25 };

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