FreeBSD/Linux Kernel Cross Reference
sys/dev/fdt/fdt_pinctrl.h

     /*-
      * Copyright (c) 2014 Ian Lepore <ian@freebsd.org>
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
      *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     *
     * $FreeBSD$
     */
    
    #ifndef DEV_FDT_PINCTRL_H
    #define DEV_FDT_PINCTRL_H
    
    #include "fdt_pinctrl_if.h"
    
    /*
     * Configure pins by name or index.  This looks up the pinctrl-N property in
     * client's fdt data by index or name, and passes each handle in it to the
     * pinctrl driver for configuration.
     */
    int fdt_pinctrl_configure(device_t client, u_int index);
    int fdt_pinctrl_configure_by_name(device_t client, const char * name);
    
    /*
     * Register a pinctrl driver so that it can be used by other devices which call
     * fdt_pinctrl_configure().  The pinprop argument is the name of a property that
     * identifies each descendent of the pinctrl node which is a pin configuration
     * node whose xref phandle can be passed to FDT_PINCTRL_CONFIGURE().  If this is
     * NULL, every descendant node is registered.
     */
    int fdt_pinctrl_register(device_t pinctrl, const char *pinprop);
    
    /*
     * Walk the device tree and configure pins for each enabled device whose
     * pinctrl-0 property contains references to nodes which are children of the
     * given pinctrl device.  This helper routine is for use by pinctrl drivers.
     */
    int fdt_pinctrl_configure_tree(device_t pinctrl);
    
    #endif /* DEV_FDT_PINCTRL_H */
    

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