FreeBSD/Linux Kernel Cross Reference
sys/dev/extres/regulator/regulator_bus.c

     /*-
      * Copyright 2016 Michal Meloun <mmel@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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    #include <sys/bus.h>
    
    #include <dev/fdt/simplebus.h>
    
    #include <dev/ofw/openfirm.h>
    #include <dev/ofw/ofw_bus_subr.h>
    
    struct ofw_regulator_bus_softc {
            struct simplebus_softc simplebus_sc;
    };
    
    static int
    ofw_regulator_bus_probe(device_t dev)
    {
            const char      *name;
    
            name = ofw_bus_get_name(dev);
            if (name == NULL || strcmp(name, "regulators") != 0)
                    return (ENXIO);
            device_set_desc(dev, "OFW regulators bus");
    
            return (0);
    }
    
    static int
    ofw_regulator_bus_attach(device_t dev)
    {
            phandle_t node, child;
    
            node  = ofw_bus_get_node(dev);
            simplebus_init(dev, node);
    
            for (child = OF_child(node); child > 0; child = OF_peer(child)) {
                    simplebus_add_device(dev, child, 0, NULL, -1, NULL);
            }
    
            return (bus_generic_attach(dev));
    }
    
    static device_method_t ofw_regulator_bus_methods[] = {
            /* Device interface */
            DEVMETHOD(device_probe,         ofw_regulator_bus_probe),
            DEVMETHOD(device_attach,        ofw_regulator_bus_attach),
    
            DEVMETHOD_END
    };
    
    DEFINE_CLASS_1(ofw_regulator_bus, ofw_regulator_bus_driver,
        ofw_regulator_bus_methods, sizeof(struct ofw_regulator_bus_softc),
        simplebus_driver);
    EARLY_DRIVER_MODULE(ofw_regulator_bus, simplebus, ofw_regulator_bus_driver,
        0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
    MODULE_VERSION(ofw_regulator_bus, 1);

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