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