e1f3a8ce54
platform specific drivers a chance to override the generic driver. Reviewed by: mmel, adrian (mentor) Approved by: adrian (mentor) Differential Revision: https://reviews.freebsd.org/D5701
94 lines
2.8 KiB
C
94 lines
2.8 KiB
C
/*-
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* Copyright 2016 Michal Meloun <mmel@FreeBSD.org>
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* All rights reserved.
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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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <dev/fdt/simplebus.h>
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#include <dev/ofw/openfirm.h>
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#include <dev/ofw/ofw_bus_subr.h>
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struct ofw_clkbus_softc {
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struct simplebus_softc simplebus_sc;
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};
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static int
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ofw_clkbus_probe(device_t dev)
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{
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const char *name;
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name = ofw_bus_get_name(dev);
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if (name == NULL || strcmp(name, "clocks") != 0)
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return (ENXIO);
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device_set_desc(dev, "OFW clocks bus");
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return (BUS_PROBE_GENERIC);
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}
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static int
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ofw_clkbus_attach(device_t dev)
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{
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struct ofw_clkbus_softc *sc;
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phandle_t node, child;
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device_t cdev;
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sc = device_get_softc(dev);
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node = ofw_bus_get_node(dev);
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simplebus_init(dev, node);
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for (child = OF_child(node); child > 0; child = OF_peer(child)) {
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cdev = simplebus_add_device(dev, child, 0, NULL, -1, NULL);
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if (cdev != NULL)
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device_probe_and_attach(cdev);
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}
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return (bus_generic_attach(dev));
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}
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static device_method_t ofw_clkbus_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, ofw_clkbus_probe),
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DEVMETHOD(device_attach, ofw_clkbus_attach),
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DEVMETHOD_END
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};
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DEFINE_CLASS_1(ofw_clkbus, ofw_clkbus_driver, ofw_clkbus_methods,
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sizeof(struct ofw_clkbus_softc), simplebus_driver);
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static devclass_t ofw_clkbus_devclass;
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EARLY_DRIVER_MODULE(ofw_clkbus, simplebus, ofw_clkbus_driver,
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ofw_clkbus_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
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MODULE_VERSION(ofw_clkbus, 1);
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