137 lines
4.0 KiB
C
137 lines
4.0 KiB
C
/****************************************************************************
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* drivers/power/pm.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __DRIVERS_POWER_PM_H
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#define __DRIVERS_POWER_PM_H
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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 <queue.h>
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#include <nuttx/semaphore.h>
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#include <nuttx/clock.h>
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#include <nuttx/power/pm.h>
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#include <nuttx/wdog.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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* Name: pm_lock
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*
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* Description:
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* Lock the power management registry. NOTE: This function may return
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* an error if a signal is received while what (errno == EINTR).
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*
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****************************************************************************/
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#define pm_lock() nxsem_wait(&g_pmglobals.regsem);
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/****************************************************************************
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* Name: pm_unlock
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*
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* Description:
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* Unlock the power management registry.
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*
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****************************************************************************/
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#define pm_unlock() nxsem_post(&g_pmglobals.regsem);
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/****************************************************************************
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* Public Types
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****************************************************************************/
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/* This describes the activity and state for one domain */
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struct pm_domain_s
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{
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/* The current state for this PM domain (as determined by an
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* explicit call to pm_changestate())
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*/
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uint8_t state;
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/* The power state lock count */
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uint16_t stay[PM_COUNT];
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};
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/* This structure encapsulates all of the global data used by the PM system */
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struct pm_global_s
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{
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/* This semaphore manages mutually exclusive access to the power management
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* registry. It must be initialized to the value 1.
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*/
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sem_t regsem;
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/* registry is a doubly-linked list of registered power management
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* callback structures. To ensure mutually exclusive access, this list
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* must be locked by calling pm_lock() before it is accessed.
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*/
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dq_queue_t registry;
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/* The state information for each PM domain */
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struct pm_domain_s domain[CONFIG_PM_NDOMAINS];
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/* A pointer to the PM governor instance */
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FAR const struct pm_governor_s *governor;
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};
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/****************************************************************************
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* Public Data
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****************************************************************************/
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#undef EXTERN
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#if defined(__cplusplus)
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# define EXTERN extern "C"
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extern "C"
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{
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#else
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# define EXTERN extern
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#endif
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/* All PM global data: */
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EXTERN struct pm_global_s g_pmglobals;
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* CONFIG_PM */
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#endif /* #define __DRIVERS_POWER_PM_H */
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