2 * shutdown.c - power management functions for the device tree.
4 * Copyright (c) 2002-3 Patrick Mochel
5 * 2002-3 Open Source Development Lab
7 * This file is released under the GPLv2
11 #include <linux/device.h>
12 #include <asm/semaphore.h>
17 * We handle system devices differently - we suspend and shut them
18 * down last and resume them first. That way, we don't do anything stupid like
19 * shutting down the interrupt controller before any devices..
21 * Note that there are not different stages for power management calls -
22 * they only get one called once when interrupts are disabled.
27 * device_shutdown - call ->shutdown() on each device to shutdown.
29 void device_shutdown(void)
31 struct device * dev, *devn;
33 list_for_each_entry_safe_reverse(dev, devn, &devices_kset->list,
35 if (dev->bus && dev->bus->shutdown) {
36 dev_dbg(dev, "shutdown\n");
37 dev->bus->shutdown(dev);
38 } else if (dev->driver && dev->driver->shutdown) {
39 dev_dbg(dev, "shutdown\n");
40 dev->driver->shutdown(dev);