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