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stm32l4 PWR: add VOS setting function

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This commit is contained in:
Matias Nitsche 2020-04-19 17:56:58 -03:00 committed by patacongo
parent e3e9b9acb8
commit 2a76451185
2 changed files with 64 additions and 0 deletions
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43
arch/arm/src/stm32l4/stm32l4_pwr.c
View File

@ -226,3 +226,46 @@ bool stm32l4_pwr_enableusv(bool set)
return was_set;
}
/************************************************************************************
* Name: stm32_pwr_setvos
*
* Description:
* Set voltage scaling for Vcore
*
* Input Parameters:
* vos - Either 1 or 2, to set to Range 1 or 2, respectively
*
* Returned Value:
* None
*
* Assumptions:
* At present, this function is called only from initialization logic. If used
* for any other purpose that protection to assure that its operation is atomic
* will be required.
*
************************************************************************************/
void stm32_pwr_setvos(int vos)
{
uint32_t regval;
if (vos != 1 && vos != 2)
{
return;
}
regval = getreg32(STM32L4_PWR_CR1);
regval &= ~PWR_CR1_VOS_MASK;
if (vos == 1)
{
regval |= PWR_CR1_VOS_RANGE1;
}
else
{
regval |= PWR_CR1_VOS_RANGE2;
}
putreg32(regval, STM32L4_PWR_CR1);
}

21
arch/arm/src/stm32l4/stm32l4_pwr.h
View File

@ -119,6 +119,27 @@ bool stm32l4_pwr_enablebkp(bool writable);
bool stm32l4_pwr_enableusv(bool set);
/************************************************************************************
* Name: stm32_pwr_setvos
*
* Description:
* Set voltage scaling for Vcore
*
* Input Parameters:
* vos - Either 1 or 2, to set to Range 1 or 2, respectively
*
* Returned Value:
* None
*
* Assumptions:
* At present, this function is called only from initialization logic. If used
* for any other purpose that protection to assure that its operation is atomic
* will be required.
*
************************************************************************************/
void stm32_pwr_setvos(int vos);
#undef EXTERN
#if defined(__cplusplus)
}