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soc: arm: stm32l1: set voltage scaling to range1

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Default Voltage scaling range selection (range2)
doesn't allow to configure Max frequency
switch to range1 to match any frequency

Signed-off-by: Alexandre Bourdiol <alexandre.bourdiol@st.com>
This commit is contained in:
Alexandre Bourdiol 2021-07-12 10:53:15 +02:00 • committed by Anas Nashif
commit cd881e0562
1 changed files with 9 additions and 0 deletions
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9
soc/arm/st_stm32/stm32l1/soc.c
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@ -15,6 +15,8 @@
#include <arch/arm/aarch32/cortex_m/cmsis.h>
#include <linker/linker-defs.h>
#include <string.h>
#include <stm32_ll_bus.h>
#include <stm32_ll_pwr.h>
/**
* @brief Perform basic hardware initialization at boot.
@ -43,6 +45,13 @@ static int stm32l1_init(const struct device *arg)
/* At reset, system core clock is set to 2.1 MHz from MSI */
SystemCoreClock = 2097000;
/* Default Voltage scaling range selection (range2)
* doesn't allow to configure Max frequency
* switch to range1 to match any frequency
*/
LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_PWR);
LL_PWR_SetRegulVoltageScaling(LL_PWR_REGU_VOLTAGE_SCALE1);
return 0;
}