1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2018 Emmanuel Vadot <manu@FreeBSD.org>
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/cdefs.h>
29 #include <sys/param.h>
30 #include <sys/bus.h>
31 #include <sys/kernel.h>
32 #include <sys/module.h>
33 #include <sys/mutex.h>
34 #include <sys/rman.h>
35 #include <machine/bus.h>
36
37 #include <dev/ofw/openfirm.h>
38 #include <dev/ofw/ofw_bus.h>
39 #include <dev/ofw/ofw_bus_subr.h>
40
41 #include <dev/extres/syscon/syscon.h>
42 #include <dev/fdt/simple_mfd.h>
43
44 static struct ofw_compat_data compat_data[] = {
45 {"rockchip,rk3288-grf", 1},
46 {"rockchip,rk3328-grf", 1},
47 {"rockchip,rk3399-grf", 1},
48 {"rockchip,rk3399-pmugrf", 1},
49 {NULL, 0}
50 };
51
52 static int
rk_grf_probe(device_t dev)53 rk_grf_probe(device_t dev)
54 {
55
56 if (!ofw_bus_status_okay(dev))
57 return (ENXIO);
58 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
59 return (ENXIO);
60
61 device_set_desc(dev, "RockChip General Register Files");
62 return (BUS_PROBE_DEFAULT);
63 }
64
65 static device_method_t rk_grf_methods[] = {
66 DEVMETHOD(device_probe, rk_grf_probe),
67
68 DEVMETHOD_END
69 };
70
71 DEFINE_CLASS_1(rk_grf, rk_grf_driver, rk_grf_methods,
72 sizeof(struct simple_mfd_softc), simple_mfd_driver);
73
74 static devclass_t rk_grf_devclass;
75 EARLY_DRIVER_MODULE(rk_grf, simplebus, rk_grf_driver, rk_grf_devclass,
76 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
77 MODULE_VERSION(rk_grf, 1);
78