diff options
| -rw-r--r-- | ports/stm32/powerctrl.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/ports/stm32/powerctrl.c b/ports/stm32/powerctrl.c index 669e568f8..42bd262c2 100644 --- a/ports/stm32/powerctrl.c +++ b/ports/stm32/powerctrl.c @@ -54,8 +54,6 @@ int powerctrl_rcc_clock_config_pll(RCC_ClkInitTypeDef *rcc_init, uint32_t sysclk } } RCC->DCKCFGR2 |= RCC_DCKCFGR2_CK48MSEL; - } else { - RCC->DCKCFGR2 &= ~RCC_DCKCFGR2_CK48MSEL; } // If possible, scale down the internal voltage regulator to save power @@ -208,6 +206,8 @@ set_clk: } #if defined(STM32F7) + // Deselect PLLSAI as 48MHz source if we were using it + RCC->DCKCFGR2 &= ~RCC_DCKCFGR2_CK48MSEL; // Turn PLLSAI off because we are changing PLLM (which drives PLLSAI) RCC->CR &= ~RCC_CR_PLLSAION; #endif |