1 /*-
2 * Copyright 2016 Michal Meloun <mmel@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/kernel.h>
33 #include <sys/module.h>
34 #include <sys/bus.h>
35
36 #include <dev/fdt/simplebus.h>
37
38 #include <dev/ofw/openfirm.h>
39 #include <dev/ofw/ofw_bus_subr.h>
40
41 struct ofw_regulator_bus_softc {
42 struct simplebus_softc simplebus_sc;
43 };
44
45 static int
ofw_regulator_bus_probe(device_t dev)46 ofw_regulator_bus_probe(device_t dev)
47 {
48 const char *name;
49
50 name = ofw_bus_get_name(dev);
51 if (name == NULL || strcmp(name, "regulators") != 0)
52 return (ENXIO);
53 device_set_desc(dev, "OFW regulators bus");
54
55 return (0);
56 }
57
58 static int
ofw_regulator_bus_attach(device_t dev)59 ofw_regulator_bus_attach(device_t dev)
60 {
61 struct ofw_regulator_bus_softc *sc;
62 phandle_t node, child;
63
64 sc = device_get_softc(dev);
65 node = ofw_bus_get_node(dev);
66 simplebus_init(dev, node);
67
68 for (child = OF_child(node); child > 0; child = OF_peer(child)) {
69 simplebus_add_device(dev, child, 0, NULL, -1, NULL);
70 }
71
72 return (bus_generic_attach(dev));
73 }
74
75 static device_method_t ofw_regulator_bus_methods[] = {
76 /* Device interface */
77 DEVMETHOD(device_probe, ofw_regulator_bus_probe),
78 DEVMETHOD(device_attach, ofw_regulator_bus_attach),
79
80 DEVMETHOD_END
81 };
82
83 DEFINE_CLASS_1(ofw_regulator_bus, ofw_regulator_bus_driver,
84 ofw_regulator_bus_methods, sizeof(struct ofw_regulator_bus_softc),
85 simplebus_driver);
86 static devclass_t ofw_regulator_bus_devclass;
87 EARLY_DRIVER_MODULE(ofw_regulator_bus, simplebus, ofw_regulator_bus_driver,
88 ofw_regulator_bus_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
89 MODULE_VERSION(ofw_regulator_bus, 1);
90