nuttx/drivers/power/pm/pm_initialize.c

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/****************************************************************************
* drivers/power/pm/pm_initialize.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/power/pm.h>
#include <nuttx/semaphore.h>
#include <nuttx/sched.h>
#include "pm.h"
#ifdef CONFIG_PM
/****************************************************************************
* Public Data
****************************************************************************/
/* All PM global data: */
/* Initialize the registry and the PM global data structures. The PM
* global data structure resides in .data which is zeroed at boot time. So
* it is only required to initialize non-zero elements of the PM global
* data structure here.
*/
struct pm_global_s g_pmglobals =
{
SEM_INITIALIZER(1)
};
/****************************************************************************
* 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
2018-08-19 19:19:43 +02:00
* must be called *very* early in the initialization 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)
{
FAR const struct pm_governor_s *gov;
#if CONFIG_PM_GOVERNOR_EXPLICIT_RELAX
int state;
#endif
int i;
pm_wakelock_global_init();
/* Select governor */
for (i = 0; i < CONFIG_PM_NDOMAINS; i++)
{
#if defined(CONFIG_PM_GOVERNOR_GREEDY)
gov = pm_greedy_governor_initialize();
#elif defined(CONFIG_PM_GOVERNOR_ACTIVITY)
gov = pm_activity_governor_initialize();
#else
static struct pm_governor_s null;
gov = &null;
#endif
pm_set_governor(i, gov);
nxrmutex_init(&g_pmglobals.domain[i].lock);
#if CONFIG_PM_GOVERNOR_EXPLICIT_RELAX
for (state = 0; state < PM_COUNT; state++)
{
# if CONFIG_PM_GOVERNOR_EXPLICIT_RELAX < 0
pm_stay(i, state);
# else
pm_staytimeout(i, state, CONFIG_PM_GOVERNOR_EXPLICIT_RELAX);
# endif
}
#endif
}
}
#endif /* CONFIG_PM */