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/*
* drivers/base/power/main.c - Where the driver meets power management.
*
* Copyright (c) 2003 Patrick Mochel
* Copyright (c) 2003 Open Source Development Lab
*
* This file is released under the GPLv2
*
*
* The driver model core calls device_pm_add() when a device is registered.
* This will intialize the embedded device_pm_info object in the device
* and add it to the list of power-controlled devices. sysfs entries for
* controlling device power management will also be added.
*
* A different set of lists than the global subsystem list are used to
* keep track of power info because we use different lists to hold
* devices based on what stage of the power management process they
* are in. The power domain dependencies may also differ from the
* ancestral dependencies that the subsystem list maintains.
*/
#include <linux/device.h>
#include <linux/mutex.h>
#include "power.h"
LIST_HEAD(dpm_active);
LIST_HEAD(dpm_off);
LIST_HEAD(dpm_off_irq);
DEFINE_MUTEX(dpm_mtx);
DEFINE_MUTEX(dpm_list_mtx);
int (*platform_enable_wakeup)(struct device *dev, int is_on);
int device_pm_add(struct device *dev)
{
int error;
pr_debug("PM: Adding info for %s:%s\n",
dev->bus ? dev->bus->name : "No Bus",
kobject_name(&dev->kobj));
mutex_lock(&dpm_list_mtx);
list_add_tail(&dev->power.entry, &dpm_active);
error = dpm_sysfs_add(dev);
if (error)
list_del(&dev->power.entry);
mutex_unlock(&dpm_list_mtx);
return error;
}
void device_pm_remove(struct device *dev)
{
pr_debug("PM: Removing info for %s:%s\n",
dev->bus ? dev->bus->name : "No Bus",
kobject_name(&dev->kobj));
mutex_lock(&dpm_list_mtx);
dpm_sysfs_remove(dev);
list_del_init(&dev->power.entry);
mutex_unlock(&dpm_list_mtx);
}
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