brcm,nsp-gpio.txt

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    1 Broadcom Northstar plus (NSP) GPIO/PINCONF Controller
    2 
    3 Required properties:
    4 - compatible:
    5     Must be "brcm,nsp-gpio-a"
    6 
    7 - reg:
    8     Should contain the register physical address and length for each of
    9     GPIO base, IO control registers
   10 
   11 - #gpio-cells:
   12     Must be two. The first cell is the GPIO pin number (within the
   13     controller's pin space) and the second cell is used for the following:
   14     bit[0]: polarity (0 for active high and 1 for active low)
   15 
   16 - gpio-controller:
   17     Specifies that the node is a GPIO controller
   18 
   19 - ngpios:
   20     Number of gpios supported (58x25 supports 32 and 58x23 supports 24)
   21 
   22 Optional properties:
   23 - interrupts:
   24     Interrupt ID
   25 
   26 - interrupt-controller:
   27     Specifies that the node is an interrupt controller
   28 
   29 - gpio-ranges:
   30     Specifies the mapping between gpio controller and pin-controllers pins.
   31     This requires 4 fields in cells defined as -
   32     1. Phandle of pin-controller.
   33     2. GPIO base pin offset.
   34     3  Pin-control base pin offset.
   35     4. number of gpio pins which are linearly mapped from pin base.
   36 
   37 Supported generic PINCONF properties in child nodes:
   38 - pins:
   39     The list of pins (within the controller's own pin space) that properties
   40     in the node apply to. Pin names are "gpio-<pin>"
   41 
   42 - bias-disable:
   43     Disable pin bias
   44 
   45 - bias-pull-up:
   46     Enable internal pull up resistor
   47 
   48 - bias-pull-down:
   49     Enable internal pull down resistor
   50 
   51 - drive-strength:
   52     Valid drive strength values include 2, 4, 6, 8, 10, 12, 14, 16 (mA)
   53 
   54 Example:
   55 
   56         gpioa: gpio@18000020 {
   57                 compatible = "brcm,nsp-gpio-a";
   58                 reg = <0x18000020 0x100>,
   59                       <0x1803f1c4 0x1c>;
   60                 #gpio-cells = <2>;
   61                 gpio-controller;
   62                 ngpios = <32>;
   63                 gpio-ranges = <&pinctrl 0 0 31>;
   64                 interrupt-controller;
   65                 interrupts = <GIC_SPI 85 IRQ_TYPE_LEVEL_HIGH>;
   66 
   67                 /* Hog a few default settings */
   68                 pinctrl-names = "default";
   69                 pinctrl-0 = <&led>;
   70                 led: led {
   71                         pins = "gpio-1";
   72                         bias-pull-up;
   73                 };
   74 
   75                 pwr: pwr {
   76                         gpio-hog;
   77                         gpios = <3 1>;
   78                         output-high;
   79                 };
   80         };

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/pinctrl/brcm,nsp-gpio.txt

FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/pinctrl/brcm,nsp-gpio.txt