FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/pinctrl/pinctrl-sirf.txt

     CSR SiRFprimaII pinmux controller
     
     Required properties:
     - compatible    : "sirf,prima2-pinctrl"
     - reg           : Address range of the pinctrl registers
     - interrupts    : Interrupts used by every GPIO group
     - gpio-controller : Indicates this device is a GPIO controller
     - interrupt-controller  : Marks the device node as an interrupt controller
     Optional properties:
    - sirf,pullups : if n-th bit of m-th bank is set, set a pullup on GPIO-n of bank m
    - sirf,pulldowns : if n-th bit of m-th bank is set, set a pulldown on GPIO-n of bank m
    
    Please refer to pinctrl-bindings.txt in this directory for details of the common
    pinctrl bindings used by client devices.
    
    SiRFprimaII's pinmux nodes act as a container for an arbitrary number of subnodes.
    Each of these subnodes represents some desired configuration for a group of pins.
    
    Required subnode-properties:
    - sirf,pins : An array of strings. Each string contains the name of a group.
    - sirf,function: A string containing the name of the function to mux to the
      group.
    
      Valid values for group and function names can be found from looking at the
      group and function arrays in driver files:
      drivers/pinctrl/pinctrl-sirf.c
    
    For example, pinctrl might have subnodes like the following:
     uart2_pins_a: uart2@0 {
             uart {
                     sirf,pins = "uart2grp";
                     sirf,function = "uart2";
             };
     };
     uart2_noflow_pins_a: uart2@1 {
             uart {
                     sirf,pins = "uart2_nostreamctrlgrp";
                     sirf,function = "uart2_nostreamctrl";
             };
     };
    
    For a specific board, if it wants to use uart2 without hardware flow control,
    it can add the following to its board-specific .dts file.
    uart2: uart@b0070000 {
            pinctrl-names = "default";
            pinctrl-0 = <&uart2_noflow_pins_a>;
    }

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