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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/sys/arm/allwinner/aw_syscon.c
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/*-

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 * SPDX-License-Identifier: BSD-2-Clause

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 *

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 * Copyright (c) 2018 Kyle Evans <[email protected]>

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 *

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 * Redistribution and use in source and binary forms, with or without

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 * modification, are permitted provided that the following conditions

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 * are met:

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 * 1. Redistributions of source code must retain the above copyright

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 *    notice, this list of conditions and the following disclaimer.

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 * 2. Redistributions in binary form must reproduce the above copyright

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 *    notice, this list of conditions and the following disclaimer in the

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 *    documentation and/or other materials provided with the distribution.

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 *

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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND

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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

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 * SUCH DAMAGE.

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 */

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/*

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 * Allwinner syscon driver

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 */

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#include <sys/param.h>

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#include <sys/bus.h>

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#include <sys/kernel.h>

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#include <sys/module.h>

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#include <sys/mutex.h>

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#include <sys/rman.h>

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#include <machine/bus.h>

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#include <dev/ofw/openfirm.h>

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#include <dev/ofw/ofw_bus.h>

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#include <dev/ofw/ofw_bus_subr.h>

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#include <dev/syscon/syscon.h>

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#include <dev/syscon/syscon_generic.h>

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static struct ofw_compat_data compat_data[] = {

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	{"allwinner,sun50i-a64-system-controller", 1},

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	{"allwinner,sun50i-a64-system-control", 1},

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	{"allwinner,sun8i-a83t-system-controller", 1},

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	{"allwinner,sun8i-h3-system-controller", 1},

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	{"allwinner,sun8i-h3-system-control", 1},

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	{"allwinner,sun50i-h5-system-control", 1},

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	{"allwinner,sun20i-d1-system-control", 1},

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	{NULL,             0}

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};

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static int

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aw_syscon_probe(device_t dev)

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{

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	if (!ofw_bus_status_okay(dev))

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		return (ENXIO);

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	if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)

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		return (ENXIO);

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	device_set_desc(dev, "Allwinner syscon");

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	return (BUS_PROBE_DEFAULT);

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}

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static device_method_t aw_syscon_methods[] = {

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	DEVMETHOD(device_probe, aw_syscon_probe),

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	DEVMETHOD_END

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};

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DEFINE_CLASS_1(aw_syscon, aw_syscon_driver, aw_syscon_methods,

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    sizeof(struct syscon_generic_softc), syscon_generic_driver);

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/* aw_syscon needs to attach prior to if_awg */

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EARLY_DRIVER_MODULE(aw_syscon, simplebus, aw_syscon_driver, 0, 0,

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    BUS_PASS_SCHEDULER + BUS_PASS_ORDER_LAST);

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MODULE_VERSION(aw_syscon, 1);

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