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
40 struct 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
48 static LIST_HEAD(, fdtbus_power_controller) fdtbus_power_controllers =
49 LIST_HEAD_INITIALIZER(fdtbus_power_controllers);
50
51 int
fdtbus_register_power_controller(device_t dev,int phandle,const struct fdtbus_power_controller_func * funcs)52 fdtbus_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
67 void
fdtbus_power_reset(void)68 fdtbus_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
78 void
fdtbus_power_poweroff(void)79 fdtbus_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