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Diffstat (limited to 'nuttx/drivers/power/pm_initialize.c')
-rw-r--r-- | nuttx/drivers/power/pm_initialize.c | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/nuttx/drivers/power/pm_initialize.c b/nuttx/drivers/power/pm_initialize.c new file mode 100644 index 000000000..9401fba9e --- /dev/null +++ b/nuttx/drivers/power/pm_initialize.c @@ -0,0 +1,112 @@ +/**************************************************************************** + * drivers/power/pm_initialize.c + * + * Copyright (C) 2011-2012 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <semaphore.h> + +#include <nuttx/power/pm.h> + +#include "pm_internal.h" + +#ifdef CONFIG_PM + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +/* All PM global data: */ + +struct pm_global_s g_pmglobals; + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: pm_initialize + * + * Description: + * This function is called by MCU-specific one-time at power on reset in + * order to initialize the power management capabilities. This function + * must be called *very* early in the intialization sequence *before* any + * other device drivers are initialize (since they may attempt to register + * with the power management subsystem). + * + * Input parameters: + * None. + * + * Returned value: + * None. + * + ****************************************************************************/ + +void pm_initialize(void) +{ + /* Initialize the registry and the PM global data structures. The PM + * global data structure resides in .bss which is zeroed at boot time. So + * it is only required to initialize non-zero elements of the PM global + * data structure here. + */ + + sq_init(&g_pmglobals.registry); + sem_init(&g_pmglobals.regsem, 0, 1); +} + +#endif /* CONFIG_PM */
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