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drivers/clock_control: stm32 common: Set flash latency code under switch

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Some specific F1 variants don't handle flash latency.
Put flash latency dealing code under dedicated switch.

Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
This commit is contained in:
Erwan Gouriou 2022-03-30 17:23:00 +02:00 • committed by Carles Cufí
commit 18b3fcd86d
1 changed files with 8 additions and 3 deletions
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11
drivers/clock_control/clock_stm32_ll_common.c
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@ -358,9 +358,6 @@ static void set_up_fixed_clock_sources(void)
*/
int stm32_clock_control_init(const struct device *dev)
{
uint32_t new_hclk_freq;
uint32_t old_flash_freq;
uint32_t new_flash_freq;
int r;
ARG_UNUSED(dev);
@ -369,6 +366,11 @@ int stm32_clock_control_init(const struct device *dev)
/* Some clocks would be activated by default */
config_enable_default_clocks();
#if defined(FLASH_ACR_LATENCY)
uint32_t new_hclk_freq;
uint32_t old_flash_freq;
uint32_t new_flash_freq;
old_flash_freq = RCC_CALC_FLASH_FREQ(HAL_RCC_GetSysClockFreq(),
GET_CURRENT_FLASH_PRESCALER());
@ -382,6 +384,7 @@ int stm32_clock_control_init(const struct device *dev)
if (new_flash_freq > old_flash_freq) {
LL_SetFlashLatency(new_flash_freq);
}
#endif /* FLASH_ACR_LATENCY */
/* Set up indiviual enabled clocks */
set_up_fixed_clock_sources();
@ -425,10 +428,12 @@ int stm32_clock_control_init(const struct device *dev)
LL_RCC_SetAHBPrescaler(ahb_prescaler(STM32_CORE_PRESCALER));
}
#if defined(FLASH_ACR_LATENCY)
/* If freq not increased, set flash latency after all clock setting */
if (old_flash_freq >= CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC) {
LL_SetFlashLatency(CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC);
}
#endif /* FLASH_ACR_LATENCY */
SystemCoreClock = CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC;