fix usb clock for dpow1

Author: hathach

hw/bsp/stm32g4/boards/b_g474e_dpow1/board.h

@@ -61,44 +61,38 @@ static inline void board_clock_init(void)
 {
   RCC_OscInitTypeDef RCC_OscInitStruct = {0};
   RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
-  RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};
 
   // Configure the main internal regulator output voltage
   HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1_BOOST);
 
-  // Initializes the CPU, AHB and APB buses clocks
-  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI48 | RCC_OSCILLATORTYPE_HSE;
-  RCC_OscInitStruct.HSEState       = RCC_HSE_ON;
-  RCC_OscInitStruct.HSI48State     = RCC_HSI48_ON;
-  RCC_OscInitStruct.PLL.PLLState   = RCC_PLL_ON;
-  RCC_OscInitStruct.PLL.PLLSource  = RCC_PLLSOURCE_HSE;
-  RCC_OscInitStruct.PLL.PLLM       = RCC_PLLM_DIV4;
-  RCC_OscInitStruct.PLL.PLLN       = 50;
-  RCC_OscInitStruct.PLL.PLLP       = RCC_PLLP_DIV2;
-  RCC_OscInitStruct.PLL.PLLQ       = RCC_PLLQ_DIV2;
-  RCC_OscInitStruct.PLL.PLLR       = RCC_PLLR_DIV2;
+  /* Activate PLL with HSI as source */
+  RCC_OscInitStruct.OscillatorType      = RCC_OSCILLATORTYPE_HSI;
+  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
+  RCC_OscInitStruct.HSIState            = RCC_HSI_ON;
+  RCC_OscInitStruct.PLL.PLLState        = RCC_PLL_ON;
+  RCC_OscInitStruct.PLL.PLLSource       = RCC_PLLSOURCE_HSI;
+  RCC_OscInitStruct.PLL.PLLM            = RCC_PLLM_DIV4;
+  RCC_OscInitStruct.PLL.PLLN            = 85;
+  RCC_OscInitStruct.PLL.PLLP            = RCC_PLLP_DIV10;
+  RCC_OscInitStruct.PLL.PLLQ            = RCC_PLLQ_DIV2;
+  RCC_OscInitStruct.PLL.PLLR            = RCC_PLLR_DIV2;
   HAL_RCC_OscConfig(&RCC_OscInitStruct);
 
   // Initializes the CPU, AHB and APB buses clocks
-  RCC_ClkInitStruct.ClockType      = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
+  RCC_ClkInitStruct.ClockType      = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK |
+                                     RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
   RCC_ClkInitStruct.SYSCLKSource   = RCC_SYSCLKSOURCE_PLLCLK;
   RCC_ClkInitStruct.AHBCLKDivider  = RCC_SYSCLK_DIV1;
   RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
   RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
   HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_8);
 
-  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USB;
-  PeriphClkInit.UsbClockSelection    = RCC_USBCLKSOURCE_HSI48;
-  HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) ;
-
-#if 0 // TODO need to check if USB clock is enabled
-  /* Enable HSI48 */
-  memset(&RCC_OscInitStruct, 0, sizeof(RCC_OscInitStruct));
-
-  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI48;
-  RCC_OscInitStruct.HSI48State = RCC_HSI48_ON;
-  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
-  HAL_RCC_OscConfig(&RCC_OscInitStruct);
+  //------------- HSI48 and CRS for USB -------------//
+  RCC_OscInitTypeDef osc_hsi48 = {0};
+  osc_hsi48.OscillatorType = RCC_OSCILLATORTYPE_HSI48;
+  osc_hsi48.HSI48State = RCC_HSI48_ON;
+  osc_hsi48.PLL.PLLState = RCC_PLL_NONE;
+  HAL_RCC_OscConfig(&osc_hsi48);
 
   /*Enable CRS Clock*/
   RCC_CRSInitTypeDef RCC_CRSInitStruct= {0};
@@ -119,7 +113,11 @@ static inline void board_clock_init(void)
 
   /* Start automatic synchronization */
   HAL_RCCEx_CRSConfig(&RCC_CRSInitStruct);
-#endif
+
+  RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};
+  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USB;
+  PeriphClkInit.UsbClockSelection    = RCC_USBCLKSOURCE_HSI48;
+  HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit);
 }
 
 static inline void board_vbus_sense_init(void)