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/brcm,bcm6345-gpio.txt

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    1 Bindings for the Broadcom's brcm,bcm6345-gpio memory-mapped GPIO controllers.
    2 
    3 These bindings can be used on any BCM63xx SoC. However, BCM6338 and BCM6345
    4 are the only ones which don't need a pinctrl driver.
    5 BCM6338 have 8-bit data and dirout registers, where GPIO state can be read
    6 and/or written, and the direction changed from input to output.
    7 BCM6345 have 16-bit data and dirout registers, where GPIO state can be read
    8 and/or written, and the direction changed from input to output.
    9 
   10 Required properties:
   11         - compatible: should be "brcm,bcm6345-gpio"
   12         - reg-names: must contain
   13                 "dat" - data register
   14                 "dirout" - direction (output) register
   15         - reg: address + size pairs describing the GPIO register sets;
   16                 order must correspond with the order of entries in reg-names
   17         - #gpio-cells: must be set to 2. The first cell is the pin number and
   18                         the second cell is used to specify the gpio polarity:
   19                         0 = active high
   20                         1 = active low
   21         - gpio-controller: Marks the device node as a gpio controller.
   22 
   23 Optional properties:
   24         - native-endian: use native endian memory.
   25 
   26 Examples:
   27         - BCM6338:
   28         gpio: gpio-controller@fffe0407 {
   29                 compatible = "brcm,bcm6345-gpio";
   30                 reg-names = "dirout", "dat";
   31                 reg = <0xfffe0407 1>, <0xfffe040f 1>;
   32 
   33                 #gpio-cells = <2>;
   34                 gpio-controller;
   35         };
   36 
   37         - BCM6345:
   38         gpio: gpio-controller@fffe0406 {
   39                 compatible = "brcm,bcm6345-gpio";
   40                 reg-names = "dirout", "dat";
   41                 reg = <0xfffe0406 2>, <0xfffe040a 2>;
   42                 native-endian;
   43 
   44                 #gpio-cells = <2>;
   45                 gpio-controller;
   46         };

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