FreeBSD/Linux Kernel Cross Reference
sys/arm64/rockchip/rk_grf.c

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2018 Emmanuel Vadot <manu@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 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/bus.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    #include <sys/mutex.h>
    #include <sys/rman.h>
    #include <machine/bus.h>
    
    #include <dev/ofw/openfirm.h>
    #include <dev/ofw/ofw_bus.h>
    #include <dev/ofw/ofw_bus_subr.h>
    
    #include <dev/extres/syscon/syscon.h>
    #include <dev/fdt/simple_mfd.h>
    
    static struct ofw_compat_data compat_data[] = {
            {"rockchip,rk3288-grf", 1},
            {"rockchip,rk3328-grf", 1},
            {"rockchip,rk3399-grf", 1},
            {"rockchip,rk3399-pmugrf", 1},
            {"rockchip,rk3568-grf", 1},
            {"rockchip,rk3568-pmugrf", 1},
            {"rockchip,rk3568-usb2phy-grf", 1},
            {"rockchip,rk3566-pipe-grf", 1},
            {"rockchip,rk3568-pipe-grf", 1},
            {"rockchip,rk3568-pipe-phy-grf", 1},
            {"rockchip,rk3568-pcie3-phy-grf", 1},
            {NULL,             0}
    };
    
    static int
    rk_grf_probe(device_t dev)
    {
    
            if (!ofw_bus_status_okay(dev))
                    return (ENXIO);
            if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
                    return (ENXIO);
    
            device_set_desc(dev, "RockChip General Register Files");
            return (BUS_PROBE_DEFAULT);
    }
    
    static device_method_t rk_grf_methods[] = {
            DEVMETHOD(device_probe, rk_grf_probe),
    
            DEVMETHOD_END
    };
    
    DEFINE_CLASS_1(rk_grf, rk_grf_driver, rk_grf_methods,
        sizeof(struct simple_mfd_softc), simple_mfd_driver);
    
    EARLY_DRIVER_MODULE(rk_grf, simplebus, rk_grf_driver, 0, 0,
        BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
    MODULE_VERSION(rk_grf, 1);

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