bsp: fix stm32 rtc hal library error.
@@ -110,6 +110,9 @@ static rt_err_t rt_rtc_config(struct rt_device *dev)
#endif
HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct);
+ /* Enable RTC Clock */
+ __HAL_RCC_RTC_ENABLE();
+
RTC_Handler.Instance = RTC;
if (HAL_RTCEx_BKUPRead(&RTC_Handler, RTC_BKP_DR1) != BKUP_REG_DATA)
{
