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stm32l4x6 RCC: set CORE regulator range according to CPU clock

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This commit is contained in:
Matias Nitsche
2020-04-19 18:02:36 -03:00
committed by patacongo
parent 891acc5fa3
commit 34bf9b26e0
1 changed files with 16 additions and 13 deletions
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arch/arm/src/stm32l4/stm32l4x6xx_rcc.c
+16 -13
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@@ -777,23 +777,26 @@ static void stm32l4_stdclockconfig(void)
if (timeout > 0)
{
#warning todo: regulator voltage according to clock freq
#if 0
/* Ensure Power control is enabled before modifying it. */
regval = getreg32(STM32L4_RCC_APB1ENR);
regval |= RCC_APB1ENR_PWREN;
putreg32(regval, STM32L4_RCC_APB1ENR);
stm32l4_pwr_enableclk(true);
/* Select regulator voltage output Scale 1 mode to support system
* frequencies up to 168 MHz.
*/
if (STM32L4_SYSCLK_FREQUENCY > 24000000ul)
{
/* Select regulator voltage output Scale 1 mode to support system
* frequencies up to 168 MHz.
*/
regval = getreg32(STM32L4_PWR_CR);
regval &= ~PWR_CR_VOS_MASK;
regval |= PWR_CR_VOS_SCALE_1;
putreg32(regval, STM32L4_PWR_CR);
#endif
stm32_pwr_setvos(1);
}
else
{
/* Select regulator voltage output Scale 2 mode for
* frequencies below 24 MHz
*/
stm32_pwr_setvos(2);
}
/* Set the HCLK source/divider */