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 */
33void 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