Merge git://git.infradead.org/mtd-2.6
[linux-2.6] / drivers / base / power / shutdown.c
1 /*
2  * shutdown.c - power management functions for the device tree.
3  *
4  * Copyright (c) 2002-3 Patrick Mochel
5  *               2002-3 Open Source Development Lab
6  *
7  * This file is released under the GPLv2
8  *
9  */
10
11 #include <linux/device.h>
12 #include <asm/semaphore.h>
13
14 #include "../base.h"
15 #include "power.h"
16
17 #define to_dev(node) container_of(node, struct device, kobj.entry)
18
19
20 /**
21  * We handle system devices differently - we suspend and shut them
22  * down last and resume them first. That way, we don't do anything stupid like
23  * shutting down the interrupt controller before any devices..
24  *
25  * Note that there are not different stages for power management calls -
26  * they only get one called once when interrupts are disabled.
27  */
28
29
30 /**
31  * device_shutdown - call ->shutdown() on each device to shutdown.
32  */
33 void device_shutdown(void)
34 {
35         struct device * dev, *devn;
36
37         list_for_each_entry_safe_reverse(dev, devn, &devices_subsys.list,
38                                 kobj.entry) {
39                 if (dev->bus && dev->bus->shutdown) {
40                         dev_dbg(dev, "shutdown\n");
41                         dev->bus->shutdown(dev);
42                 } else if (dev->driver && dev->driver->shutdown) {
43                         dev_dbg(dev, "shutdown\n");
44                         dev->driver->shutdown(dev);
45                 }
46         }
47
48         sysdev_shutdown();
49 }
50