84 lines
2.5 KiB
C
84 lines
2.5 KiB
C
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/* Copyright (c) 2011, 2013, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*
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* Subsystem restart notifier API header
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*
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*/
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#ifndef _SUBSYS_NOTIFIER_H
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#define _SUBSYS_NOTIFIER_H
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#include <linux/notifier.h>
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enum subsys_notif_type {
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SUBSYS_BEFORE_SHUTDOWN,
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SUBSYS_AFTER_SHUTDOWN,
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SUBSYS_BEFORE_POWERUP,
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SUBSYS_AFTER_POWERUP,
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SUBSYS_RAMDUMP_NOTIFICATION,
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SUBSYS_NOTIF_TYPE_COUNT
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};
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#if defined(CONFIG_MSM_SUBSYSTEM_RESTART)
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/* Use the subsys_notif_register_notifier API to register for notifications for
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* a particular subsystem. This API will return a handle that can be used to
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* un-reg for notifications using the subsys_notif_unregister_notifier API by
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* passing in that handle as an argument.
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*
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* On receiving a notification, the second (unsigned long) argument of the
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* notifier callback will contain the notification type, and the third (void *)
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* argument will contain the handle that was returned by
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* subsys_notif_register_notifier.
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*/
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void *subsys_notif_register_notifier(
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const char *subsys_name, struct notifier_block *nb);
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int subsys_notif_unregister_notifier(void *subsys_handle,
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struct notifier_block *nb);
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/* Use the subsys_notif_init_subsys API to initialize the notifier chains form
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* a particular subsystem. This API will return a handle that can be used to
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* queue notifications using the subsys_notif_queue_notification API by passing
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* in that handle as an argument.
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*/
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void *subsys_notif_add_subsys(const char *);
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int subsys_notif_queue_notification(void *subsys_handle,
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enum subsys_notif_type notif_type,
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void *data);
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#else
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static inline void *subsys_notif_register_notifier(
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const char *subsys_name, struct notifier_block *nb)
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{
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return NULL;
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}
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static inline int subsys_notif_unregister_notifier(void *subsys_handle,
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struct notifier_block *nb)
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{
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return 0;
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}
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static inline void *subsys_notif_add_subsys(const char *subsys_name)
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{
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return NULL;
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}
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static inline int subsys_notif_queue_notification(void *subsys_handle,
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enum subsys_notif_type notif_type,
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void *data)
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{
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return 0;
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}
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#endif /* CONFIG_MSM_SUBSYSTEM_RESTART */
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#endif
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