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drivers/clock_control: stm32wl: Consider new options for HSE clock

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On STM32WL, HSE clock can take 2 specific options:
-hse-tcxo
-hse-div2
Enable support for these options.

Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
This commit is contained in:
Erwan Gouriou 2021-07-28 16:28:41 +02:00 • committed by Anas Nashif
commit d40910097a
1 changed files with 24 additions and 12 deletions
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36
drivers/clock_control/clock_stm32_ll_common.c
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@ -486,18 +486,24 @@ int stm32_clock_control_init(const struct device *dev)
LL_RCC_MSI_Disable();
#elif STM32_PLL_SRC_HSE
int hse_bypass;
#ifndef CONFIG_SOC_SERIES_STM32WLX
int hse_bypass;
if (IS_ENABLED(STM32_HSE_BYPASS)) {
hse_bypass = LL_UTILS_HSEBYPASS_ON;
} else {
hse_bypass = LL_UTILS_HSEBYPASS_OFF;
}
#else
if (IS_ENABLED(STM32_HSE_TCXO)) {
LL_RCC_HSE_EnableTcxo();
}
if (IS_ENABLED(STM32_HSE_DIV2)) {
LL_RCC_HSE_EnableDiv2();
}
#endif
/* Switch to PLL with HSE as clock source */
#ifdef CONFIG_SOC_SERIES_STM32WLX
LL_RCC_HSE_EnableTcxo();
#endif
LL_PLL_ConfigSystemClock_HSE(
#if !defined(CONFIG_SOC_SERIES_STM32WBX) && !defined(CONFIG_SOC_SERIES_STM32WLX)
CONFIG_CLOCK_STM32_HSE_CLOCK,
@ -520,8 +526,14 @@ int stm32_clock_control_init(const struct device *dev)
GET_CURRENT_FLASH_PRESCALER());
/* Calculate new SystemCoreClock variable based on HSE freq */
new_hclk_freq = __LL_RCC_CALC_HCLK_FREQ(CONFIG_CLOCK_STM32_HSE_CLOCK,
hclk_prescaler);
uint32_t hse_freq;
if (IS_ENABLED(STM32_HSE_DIV2)) {
hse_freq = CONFIG_CLOCK_STM32_HSE_CLOCK / 2;
} else {
hse_freq = CONFIG_CLOCK_STM32_HSE_CLOCK;
}
new_hclk_freq = __LL_RCC_CALC_HCLK_FREQ(hse_freq, hclk_prescaler);
#if defined(CONFIG_SOC_SERIES_STM32WBX) || defined(CONFIG_SOC_SERIES_STM32WLX)
new_flash_freq = RCC_CALC_FLASH_FREQ(CONFIG_CLOCK_STM32_HSE_CLOCK,
flash_prescaler);
@ -542,18 +554,18 @@ int stm32_clock_control_init(const struct device *dev)
/* Enable HSE if not enabled */
if (LL_RCC_HSE_IsReady() != 1) {
#ifdef CONFIG_SOC_SERIES_STM32WLX
if (IS_ENABLED(STM32_HSE_TCXO)) {
LL_RCC_HSE_EnableTcxo();
}
#else
/* Check if need to enable HSE bypass feature or not */
if (IS_ENABLED(STM32_HSE_BYPASS)) {
#ifdef CONFIG_SOC_SERIES_STM32WLX
LL_RCC_HSE_EnableTcxo();
} else {
LL_RCC_HSE_DisableTcxo();
#else
LL_RCC_HSE_EnableBypass();
} else {
LL_RCC_HSE_DisableBypass();
#endif
}
#endif
/* Enable HSE */
LL_RCC_HSE_Enable();