c6569bab0e
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4490 42af7a65-404d-4744-a932-0658087f49c3
108 lines
4.0 KiB
C
108 lines
4.0 KiB
C
/****************************************************************************
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* arch/arm/src/stm32/stm32_pminitialize.c
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*
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* Copyright (C) 2012 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/power/pm.h>
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#include "up_internal.h"
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#include "stm32_pm.h"
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#ifdef CONFIG_PM
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/* Before any power state transition is made, the caller should hold this
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* semaphore to assure that there are no concurrent, contradictory power
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* state activities.
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*/
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sem_t g_pmsem;
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: up_pminitialize
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*
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* Description:
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* This function is called by MCU-specific logic at power-on reset in
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* order to provide one-time initialization the power management subystem.
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* This function must be called *very* early in the intialization sequence
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* *before* any other device drivers are initialized (since they may
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* attempt to register with the power management subsystem).
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*
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* Input parameters:
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* None.
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*
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* Returned value:
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* None.
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*
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****************************************************************************/
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void up_pminitialize(void)
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{
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/* Initialize the PM semaphore to assure that no more than one power-related
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* action occurs at a time.
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*/
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sem_init(&g_pmsem, 0, 1);
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/* Then initialize the NuttX power management subsystem proper */
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pm_initialize();
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}
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#endif /* CONFIG_PM */
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