FreeBSD/Linux Kernel Cross Reference
sys/dev/extres/syscon/syscon.h

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2017 Kyle Evans <kevans@FreeBSD.org>
      *
      * 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_SYSCON_H
    #define DEV_SYSCON_H
    
    #include "opt_platform.h"
    
    #include <sys/types.h>
    #include <sys/kobj.h>
    #ifdef FDT
    #include <dev/ofw/ofw_bus.h>
    #endif
    
    struct syscon {
            KOBJ_FIELDS;
    
            TAILQ_ENTRY(syscon)     syscon_link;   /* Global list entry */
    
            device_t                pdev;           /* provider device */
    #ifdef FDT
            phandle_t               ofw_node;       /* OFW node for syscon */
    #endif
            void                    *softc;         /* provider softc */
    };
    
    /*
     * Shorthands for constructing method tables.
     */
    #define SYSCONMETHOD            KOBJMETHOD
    #define SYSCONMETHOD_END        KOBJMETHOD_END
    #define syscon_method_t         kobj_method_t
    #define syscon_class_t          kobj_class_t
    DECLARE_CLASS(syscon_class);
    
    void *syscon_get_softc(struct syscon *syscon);
    
    /*
     * Provider interface
     */
    struct syscon *syscon_create(device_t pdev, syscon_class_t syscon_class);
    struct syscon *syscon_register(struct syscon *syscon);
    int syscon_unregister(struct syscon *syscon);
    
    #ifdef FDT
    struct syscon *syscon_create_ofw_node(device_t pdev,
        syscon_class_t syscon_class, phandle_t node);
    phandle_t syscon_get_ofw_node(struct syscon *syscon);
    int syscon_get_by_ofw_property(device_t consumer, phandle_t node, char *name,
        struct syscon **syscon);
    int syscon_get_by_ofw_node(device_t cdev, phandle_t node, struct syscon **syscon);
    #endif
    
    #endif /* DEV_SYSCON_H */

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