ibm,ppc4xx-gpio.txt

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    1 * IBM/AMCC/APM GPIO Controller for PowerPC 4XX series and compatible SoCs
    2 
    3 All GPIOs are pin-shared with other functions. DCRs control whether a
    4 particular pin that has GPIO capabilities acts as a GPIO or is used for
    5 another purpose. GPIO outputs are separately programmable to emulate
    6 an open-drain driver.
    7 
    8 Required properties:
    9         - compatible: must be "ibm,ppc4xx-gpio"
   10         - reg: address and length of the register set for the device
   11         - #gpio-cells: must be set to 2. The first cell is the pin number
   12                 and the second cell is used to specify the gpio polarity:
   13                 0 = active high
   14                 1 = active low
   15         - gpio-controller: marks the device node as a gpio controller.
   16 
   17 Example:
   18 
   19 GPIO0: gpio@ef600b00 {
   20         compatible = "ibm,ppc4xx-gpio";
   21         reg = <0xef600b00 0x00000048>;
   22         #gpio-cells = <2>;
   23         gpio-controller;
   24 };

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/gpio/ibm,ppc4xx-gpio.txt

FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/gpio/ibm,ppc4xx-gpio.txt