51 lines
1.3 KiB
C
51 lines
1.3 KiB
C
/*
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* -------------------------------------------------------------------------
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* <linux_root>/drivers/stm/pm_notify.c
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* -------------------------------------------------------------------------
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* Copyright (C) 2010 STMicroelectronics
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* Author: Francesco M. Virlinzi <francesco.virlinzi@st.com>
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*
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* May be copied or modified under the terms of the GNU General Public
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* License V.2 ONLY. See linux/COPYING for more information.
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*
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* ------------------------------------------------------------------------- */
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#include <linux/irqflags.h>
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/mutex.h>
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#include <linux/stm/pm_notify.h>
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static DEFINE_MUTEX(pm_notify_mutex);
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static struct stm_pm_notify *stm_notifier;
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enum stm_pm_notify_return
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stm_pm_prepare_enter(enum stm_pm_type type)
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{
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if (stm_notifier && stm_notifier->pre_enter)
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return stm_notifier->pre_enter(type);
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return STM_PM_RET_OK;
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}
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enum stm_pm_notify_return
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stm_pm_post_enter(enum stm_pm_type type, int wkirq)
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{
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if (stm_notifier && stm_notifier->post_enter)
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return stm_notifier->post_enter(type, wkirq);
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return STM_PM_RET_OK;
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}
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int stm_register_pm_notify(struct stm_pm_notify *notify)
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{
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if (stm_notifier || !notify)
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return -EINVAL;
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mutex_lock(&pm_notify_mutex);
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stm_notifier = notify;
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mutex_unlock(&pm_notify_mutex);
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return 0;
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}
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EXPORT_SYMBOL(stm_register_pm_notify);
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