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/*
* shutdown.c - power management functions for the device tree.
*
* Copyright (c) 2002-3 Patrick Mochel
* 2002-3 Open Source Development Lab
*
* This file is released under the GPLv2
*
*/
#include <linux/config.h>
#include <linux/device.h>
#include <asm/semaphore.h>
#include "power.h"
#define to_dev(node) container_of(node, struct device, kobj.entry)
extern struct subsystem devices_subsys;
int device_detach_shutdown(struct device * dev)
{
if (!dev->detach_state)
return 0;
if (dev->detach_state == DEVICE_PM_OFF) {
if (dev->driver && dev->driver->shutdown) {
dev_dbg(dev, "shutdown\n");
dev->driver->shutdown(dev);
}
return 0;
}
return dpm_runtime_suspend(dev, dev->detach_state);
}
/**
* We handle system devices differently - we suspend and shut them
* down last and resume them first. That way, we don't do anything stupid like
* shutting down the interrupt controller before any devices..
*
* Note that there are not different stages for power management calls -
* they only get one called once when interrupts are disabled.
*/
extern int sysdev_shutdown(void);
/**
* device_shutdown - call ->shutdown() on each device to shutdown.
*/
void device_shutdown(void)
{
struct device * dev;
down_write(&devices_subsys.rwsem);
list_for_each_entry_reverse(dev, &devices_subsys.kset.list,
kobj.entry) {
if (dev->driver && dev->driver->shutdown) {
dev_dbg(dev, "shutdown\n");
dev->driver->shutdown(dev);
}
}
up_write(&devices_subsys.rwsem);
sysdev_shutdown();
}
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