1/* $NetBSD: fdt_power.c,v 1.2 2018/06/30 20:34:43 jmcneill Exp $ */
2
3/*-
4 * Copyright (c) 2017 Jared McNeill <jmcneill@invisible.ca>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30__KERNEL_RCSID(0, "$NetBSD: fdt_power.c,v 1.2 2018/06/30 20:34:43 jmcneill Exp $");
31
32#include <sys/param.h>
33#include <sys/bus.h>
34#include <sys/kmem.h>
35#include <sys/queue.h>
36
37#include <libfdt.h>
38#include <dev/fdt/fdtvar.h>
39
40struct fdtbus_power_controller {
41	device_t power_dev;
42	int power_phandle;
43	const struct fdtbus_power_controller_func *power_funcs;
44
45	LIST_ENTRY(fdtbus_power_controller) power_next;
46};
47
48static LIST_HEAD(, fdtbus_power_controller) fdtbus_power_controllers =
49    LIST_HEAD_INITIALIZER(fdtbus_power_controllers);
50
51int
52fdtbus_register_power_controller(device_t dev, int phandle,
53    const struct fdtbus_power_controller_func *funcs)
54{
55	struct fdtbus_power_controller *power;
56
57	power = kmem_alloc(sizeof(*power), KM_SLEEP);
58	power->power_dev = dev;
59	power->power_phandle = phandle;
60	power->power_funcs = funcs;
61
62	LIST_INSERT_HEAD(&fdtbus_power_controllers, power, power_next);
63
64	return 0;
65}
66
67void
68fdtbus_power_reset(void)
69{
70	struct fdtbus_power_controller *power;
71
72	LIST_FOREACH(power, &fdtbus_power_controllers, power_next) {
73		if (power->power_funcs->reset)
74			power->power_funcs->reset(power->power_dev);
75	}
76}
77
78void
79fdtbus_power_poweroff(void)
80{
81	struct fdtbus_power_controller *power;
82
83	LIST_FOREACH(power, &fdtbus_power_controllers, power_next) {
84		if (power->power_funcs->poweroff)
85			power->power_funcs->poweroff(power->power_dev);
86	}
87}
88