fix(GNSE): add missing LSE config

prevents RTC to be properly initialized within STM32LoRaWAN.

Signed-off-by: Frederic Pillon <frederic.pillon@st.com>

Author: fpistm

variants/STM32WLxx/WL54CCU_WL55CCU_WLE4C(8-B-C)U_WLE5C(8-B-C)U/variant_GENERIC_NODE_SE_TTI.cpp

@@ -70,15 +70,20 @@ WEAK void SystemClock_Config(void)
   RCC_OscInitTypeDef RCC_OscInitStruct = {};
   RCC_ClkInitTypeDef RCC_ClkInitStruct = {};
 
+  /** Configure LSE Drive Capability
+  */
+  HAL_PWR_EnableBkUpAccess();
+  __HAL_RCC_LSEDRIVE_CONFIG(RCC_LSEDRIVE_LOW);
   /** Configure the main internal regulator output voltage
   */
-  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE2);
+  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
   /** Initializes the CPU, AHB and APB busses clocks
   */
-  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;
+  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE | RCC_OSCILLATORTYPE_MSI;
+  RCC_OscInitStruct.LSEState = RCC_LSE_ON;
   RCC_OscInitStruct.MSIState = RCC_MSI_ON;
   RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;
-  RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_6;
+  RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_11;
   RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
   if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
     Error_Handler();
@@ -94,12 +99,12 @@ WEAK void SystemClock_Config(void)
   RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
   RCC_ClkInitStruct.AHBCLK3Divider = RCC_SYSCLK_DIV1;
 
-  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK) {
+  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) {
     Error_Handler();
   }
 }
 
 #ifdef __cplusplus
 }
 #endif
-#endif /* ARDUINO_GENERIC_* */
+#endif /* ARDUINO_GENERIC_NODE_SE_TTI */