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EFM32: Add IDLE power management hooks. Nothing implemented; just define the hooks

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This commit is contained in:
Gregory Nutt 2014-10-22 07:26:31 -06:00
parent caaa73e8b5
commit 0196b77961
6 changed files with 257 additions and 11 deletions
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9
arch/arm/src/armv7-m/up_itm.c
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@ -93,7 +93,7 @@
* ch - Character to transmit.
*
* Returned Value:
* Character to transmit.
* Character to transmit.
*
*****************************************************************************/
@ -141,11 +141,12 @@ int32_t itm_receivechar(void)
* Description:
*
* Input Parameters:
* The function checks whether a character is pending for reading in the variable g_itm_rxbuffer.
* The function checks whether a character is pending for reading in the
* variable g_itm_rxbuffer.
*
* Returned Value:
* 0 No character available.
* 1 Character available.
* 0 No character available.
* 1 Character available.
*
*****************************************************************************/

89
arch/arm/src/efm32/efm32_idle.c
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@ -40,6 +40,8 @@
#include <arch/board/board.h>
#include <nuttx/config.h>
#include <debug.h>
#include <nuttx/arch.h>
#include <nuttx/power/pm.h>
@ -47,6 +49,7 @@
#include "chip.h"
#include "up_internal.h"
#include "efm32_pm.h"
/****************************************************************************
* Pre-processor Definitions
@ -72,6 +75,85 @@
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: up_idlepm
*
* Description:
* Perform IDLE state power management.
*
* REVISIT: These power management hooks were taken with no modification
* from the STM32 implementation and need review against EFM32 reduced
* power modes.
*
****************************************************************************/
#ifdef CONFIG_PM
static void up_idlepm(void)
{
static enum pm_state_e oldstate = PM_NORMAL;
enum pm_state_e newstate;
irqstate_t flags;
int ret;
/* Decide, which power saving level can be obtained */
newstate = pm_checkstate();
/* Check for state changes */
if (newstate != oldstate)
{
flags = irqsave();
/* Perform board-specific, state-dependent logic here */
llvdbg("newstate= %d oldstate=%d\n", newstate, oldstate);
/* Then force the global state change */
ret = pm_changestate(newstate);
if (ret < 0)
{
/* The new state change failed, revert to the preceding state */
(void)pm_changestate(oldstate);
}
else
{
/* Save the new state */
oldstate = newstate;
}
/* MCU-specific power management logic */
switch (newstate)
{
case PM_NORMAL:
break;
case PM_IDLE:
break;
case PM_STANDBY:
efm32_pmstop(true);
break;
case PM_SLEEP:
(void)efm32_pmstandby();
break;
default:
break;
}
irqrestore(flags);
}
}
#else
# define up_idlepm()
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
@ -92,5 +174,12 @@
void up_idle(void)
{
/* Perform IDLE mode power management */
up_idlepm();
/* Sleep until an interrupt occurs to save power. */
BEGIN_IDLE();
asm("WFI");
END_IDLE();
}

155
arch/arm/src/efm32/efm32_pm.h Normal file
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@ -0,0 +1,155 @@
/************************************************************************************
* 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 STM32 implementation and needs to be reviewed against EFM32
* reduced power modes. Comments here apply to the STM32!
*
* 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 STM32 implementation and needs to be reviewed against EFM32
* reduced power modes. Comments here apply to the STM32!
*
* 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 STM32 implementation and needs to be reviewed against EFM32
* reduced power modes. Comments here apply to the STM32!
*
* 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 */

1
arch/arm/src/stm32/stm32_idle.c
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@ -211,4 +211,3 @@ void up_idle(void)
#endif
#endif
}

13
arch/arm/src/stm32/stm32_pm.h
View File

@ -62,7 +62,8 @@
#ifndef __ASSEMBLY__
#ifdef __cplusplus
#define EXTERN extern "C"
extern "C" {
extern "C"
{
#else
#define EXTERN extern
#endif
@ -84,13 +85,13 @@ extern "C" {
*
* Returned Value:
* Zero means that the STOP was successfully entered and the system has
* been re-awakened. The internal volatage regulator is back to its
* 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.
*
****************************************************************************/
EXTERN int stm32_pmstop(bool lpds);
int stm32_pmstop(bool lpds);
/****************************************************************************
* Name: stm32_pmstandby
@ -109,7 +110,7 @@ EXTERN int stm32_pmstop(bool lpds);
*
****************************************************************************/
EXTERN int stm32_pmstandby(void);
int stm32_pmstandby(void);
/****************************************************************************
* Name: stm32_pmsleep
@ -125,13 +126,13 @@ EXTERN int stm32_pmstandby(void);
* 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 volatage regulator is back to its
* 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.
*
****************************************************************************/
EXTERN void stm32_pmsleep(bool sleeponexit);
void stm32_pmsleep(bool sleeponexit);
#undef EXTERN
#ifdef __cplusplus

1
drivers/power/battery.c
View File

@ -249,6 +249,7 @@ int battery_register(FAR const char *devpath, FAR struct battery_dev_s *dev)
{
dbg("Failed to register driver: %d\n", ret);
}
return ret;
}
#endif /* CONFIG_BATTERY */