49755fc6d2
RockChip GRF (General Register Files) is present on almost all RockChip SoC and is used to control some area of the system like iomuxing, gpio or usb phy. We need it to be probed and attached early in the boot process so subclass syscon_generic and set the pass to BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE.
82 lines
2.6 KiB
C
82 lines
2.6 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2018 Emmanuel Vadot <manu@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/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/extres/syscon/syscon.h>
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#include <dev/extres/syscon/syscon_generic.h>
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#include "opt_soc.h"
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static struct ofw_compat_data compat_data[] = {
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#ifdef SOC_ROCKCHIP_RK3328
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{"rockchip,rk3328-grf", 1},
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#endif
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{NULL, 0}
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};
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static int
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rk_grf_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, "RockChip General Register Files");
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return (BUS_PROBE_DEFAULT);
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}
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static device_method_t rk_grf_methods[] = {
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DEVMETHOD(device_probe, rk_grf_probe),
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DEVMETHOD_END
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};
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DEFINE_CLASS_1(rk_grf, rk_grf_driver, rk_grf_methods,
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sizeof(struct syscon_generic_softc), syscon_generic_driver);
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static devclass_t rk_grf_devclass;
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EARLY_DRIVER_MODULE(rk_grf, simplebus, rk_grf_driver, rk_grf_devclass,
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0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
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MODULE_VERSION(rk_grf, 1);
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