1 /*-
2 * Copyright 2016 Michal Meloun <[email protected]>
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 #include <sys/param.h>
29 #include <sys/systm.h>
30 #include <sys/kernel.h>
31 #include <sys/module.h>
32 #include <sys/bus.h>
33
34 #include <dev/fdt/simplebus.h>
35
36 #include <dev/ofw/openfirm.h>
37 #include <dev/ofw/ofw_bus_subr.h>
38
39 struct ofw_regulator_bus_softc {
40 struct simplebus_softc simplebus_sc;
41 };
42
43 static int
ofw_regulator_bus_probe(device_t dev)44 ofw_regulator_bus_probe(device_t dev)
45 {
46 const char *name;
47
48 name = ofw_bus_get_name(dev);
49 if (name == NULL || strcmp(name, "regulators") != 0)
50 return (ENXIO);
51 device_set_desc(dev, "OFW regulators bus");
52
53 return (0);
54 }
55
56 static int
ofw_regulator_bus_attach(device_t dev)57 ofw_regulator_bus_attach(device_t dev)
58 {
59 phandle_t node, child;
60
61 node = ofw_bus_get_node(dev);
62 simplebus_init(dev, node);
63
64 for (child = OF_child(node); child > 0; child = OF_peer(child)) {
65 simplebus_add_device(dev, child, 0, NULL, -1, NULL);
66 }
67
68 return (bus_generic_attach(dev));
69 }
70
71 static device_method_t ofw_regulator_bus_methods[] = {
72 /* Device interface */
73 DEVMETHOD(device_probe, ofw_regulator_bus_probe),
74 DEVMETHOD(device_attach, ofw_regulator_bus_attach),
75
76 DEVMETHOD_END
77 };
78
79 DEFINE_CLASS_1(ofw_regulator_bus, ofw_regulator_bus_driver,
80 ofw_regulator_bus_methods, sizeof(struct ofw_regulator_bus_softc),
81 simplebus_driver);
82 EARLY_DRIVER_MODULE(ofw_regulator_bus, simplebus, ofw_regulator_bus_driver,
83 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
84 MODULE_VERSION(ofw_regulator_bus, 1);
85