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/config.h>
12 #include <linux/device.h>
13 #include <asm/semaphore.h>
17 #define to_dev(node) container_of(node, struct device, kobj.entry)
19 extern struct subsystem devices_subsys;
23 * We handle system devices differently - we suspend and shut them
24 * down last and resume them first. That way, we don't do anything stupid like
25 * shutting down the interrupt controller before any devices..
27 * Note that there are not different stages for power management calls -
28 * they only get one called once when interrupts are disabled.
31 extern int sysdev_shutdown(void);
34 * device_shutdown - call ->shutdown() on each device to shutdown.
36 void device_shutdown(void)
40 down_write(&devices_subsys.rwsem);
41 list_for_each_entry_reverse(dev, &devices_subsys.kset.list,
43 if (dev->driver && dev->driver->shutdown) {
44 dev_dbg(dev, "shutdown\n");
45 dev->driver->shutdown(dev);
48 up_write(&devices_subsys.rwsem);