stm32/rng: Set RNG clock source for STM32H7.

2018-04-14 00:11:07 +02:00 · 2018-04-14 00:11:07 +02:00 · 70a6a15f8c
commit 70a6a15f8c
parent bdff68db9c
1 changed files with 5 additions and 0 deletions
--- a/ports/stm32/rng.c
+++ b/ports/stm32/rng.c
@ -33,6 +33,11 @@
 uint32_t rng_get(void) {
    // Enable the RNG peripheral if it's not already enabled
    if (!(RNG->CR & RNG_CR_RNGEN)) {
+        #if defined(STM32H7)
+        // Set RNG Clock source
+        __HAL_RCC_PLLCLKOUT_ENABLE(RCC_PLL1_DIVQ);
+        __HAL_RCC_RNG_CONFIG(RCC_RNGCLKSOURCE_PLL);
+        #endif
        __HAL_RCC_RNG_CLK_ENABLE();
        RNG->CR |= RNG_CR_RNGEN;
    }