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/************************************************************************************
* arch/arm/src/efm32/efm32_pm.h
*
* Copyright (C) 2014 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.
*
************************************************************************************/
#ifndef __ARCH_ARM_SRC_EFM32_EFM32_PM_H
#define __ARCH_ARM_SRC_EFM32_EFM32_PM_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdbool.h>
#include "chip.h"
#include "up_internal.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Public Types
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
#ifndef __ASSEMBLY__
#ifdef __cplusplus
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/****************************************************************************
* Name: efm32_pmstop
*
* Description:
* Enter STOP mode.
*
* REVISIT: This power management interface was taken with no modification
* from the EFM32 implementation and needs to be reviewed against EFM32
* reduced power modes. Comments here apply to the EFM32!
*
* Input Parameters:
* lpds - true: To further reduce power consumption in Stop mode, put the
* internal voltage regulator in low-power mode using the LPDS bit
* of the Power control register (PWR_CR).
*
* Returned Value:
* Zero means that the STOP was successfully entered and the system has
* been re-awakened. The internal voltage regulator is back to its
* original state. Otherwise, STOP mode did not occur and a negated
* errno value is returned to indicate the cause of the failure.
*
****************************************************************************/
int efm32_pmstop(bool lpds);
/****************************************************************************
* Name: efm32_pmstandby
*
* Description:
* Enter STANDBY mode.
*
* REVISIT: This power management interface was taken with no modification
* from the EFM32 implementation and needs to be reviewed against EFM32
* reduced power modes. Comments here apply to the EFM32!
*
* Input Parameters:
* None
*
* Returned Value.
* On success, this function will not return (STANDBY mode can only be
* terminated with a reset event). Otherwise, STANDBY mode did not occur
* and a negated errno value is returned to indicate the cause of the
* failure.
*
****************************************************************************/
int efm32_pmstandby(void);
/****************************************************************************
* Name: efm32_pmsleep
*
* Description:
* Enter SLEEP mode.
*
* REVISIT: This power management interface was taken with no modification
* from the EFM32 implementation and needs to be reviewed against EFM32
* reduced power modes. Comments here apply to the EFM32!
*
* Input Parameters:
* sleeponexit - true: SLEEPONEXIT bit is set when the WFI instruction is
* executed, the MCU enters Sleep mode as soon as it
* exits the lowest priority ISR.
* - false: SLEEPONEXIT bit is cleared, the MCU enters Sleep mode
* as soon as WFI or WFE instruction is executed.
* Returned Value:
* Zero means that the STOP was successfully entered and the system has
* been re-awakened. The internal voltage regulator is back to its
* original state. Otherwise, STOP mode did not occur and a negated
* errno value is returned to indicate the cause of the failure.
*
****************************************************************************/
void efm32_pmsleep(bool sleeponexit);
#undef EXTERN
#ifdef __cplusplus
}
#endif
#endif /* __ASSEMBLY__ */
#endif /* __ARCH_ARM_SRC_EFM32_EFM32_PM_H */
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