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drivers: entropy: stm32: fix compile errors for STM32L4 series

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The low level function names in the stm32l4xx low level driver are
different than all the other stm32's even though the functionality is the
same. This breaks the entropy module for these parts. This patch fixes the
build and has been tested on a custom stm32l4p5 board.

This STM32CubeL4 issue has been reported (ST Internal Reference: 207828).

Fixes: https://github.com/zephyrproject-rtos/zephyr/issues/88621

Signed-off-by: Matt Ihnen <matt.ihnen@gmail.com>
This commit is contained in:
Matt Ihnen 2025-04-16 08:55:24 -05:00 • committed by Benjamin Cabé
commit 132289ec33
1 changed files with 19 additions and 2 deletions
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21
drivers/entropy/entropy_stm32.c
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@ -232,10 +232,17 @@ static void configure_rng(void)
LL_RNG_SetHealthConfig(rng, desired_htcr); LL_RNG_SetHealthConfig(rng, desired_htcr);
#endif /* health_test_config */ #endif /* health_test_config */
#if defined(CONFIG_SOC_SERIES_STM32L4X)
LL_RNG_ResetConditioningResetBit(rng);
/* Wait for conditioning reset process to be completed */
while (LL_RNG_IsResetConditioningBitSet(rng) == 1) {
}
#else
LL_RNG_DisableCondReset(rng); LL_RNG_DisableCondReset(rng);
/* Wait for conditioning reset process to be completed */ /* Wait for conditioning reset process to be completed */
while (LL_RNG_IsEnabledCondReset(rng) == 1) { while (LL_RNG_IsEnabledCondReset(rng) == 1) {
} }
#endif /* CONFIG_SOC_SERIES_STM32L4X */
} }
#endif /* STM32_CONDRST_SUPPORT */ #endif /* STM32_CONDRST_SUPPORT */
@ -285,13 +292,23 @@ static int recover_seed_error(RNG_TypeDef *rng)
{ {
uint32_t count_timeout = 0; uint32_t count_timeout = 0;
LL_RNG_EnableCondReset(rng); #if defined(CONFIG_SOC_SERIES_STM32L4X)
LL_RNG_DisableCondReset(rng); LL_RNG_SetConditioningResetBit(rng);
LL_RNG_ResetConditioningResetBit(rng);
#else
LL_RNG_EnableCondReset(rng);
LL_RNG_DisableCondReset(rng);
#endif /* CONFIG_SOC_SERIES_STM32L4X */
/* When reset process is done cond reset bit is read 0 /* When reset process is done cond reset bit is read 0
* This typically takes: 2 AHB clock cycles + 2 RNG clock cycles. * This typically takes: 2 AHB clock cycles + 2 RNG clock cycles.
*/ */
#if defined(CONFIG_SOC_SERIES_STM32L4X)
while (LL_RNG_IsResetConditioningBitSet(rng) ||
#else
while (LL_RNG_IsEnabledCondReset(rng) || while (LL_RNG_IsEnabledCondReset(rng) ||
#endif /* CONFIG_SOC_SERIES_STM32L4X */
ll_rng_is_active_seis(rng) || ll_rng_is_active_seis(rng) ||
ll_rng_is_active_secs(rng)) { ll_rng_is_active_secs(rng)) {
count_timeout++; count_timeout++;