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