/**
  ******************************************************************************
  * @file    stm32g4xx_ll_rcc.c
  * @author  MCD Application Team
  * @brief   RCC LL module driver.
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2019 STMicroelectronics.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by ST under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  */
#if defined(USE_FULL_LL_DRIVER)

/* Includes ------------------------------------------------------------------*/
#include "stm32g4xx_ll_rcc.h"
#ifdef  USE_FULL_ASSERT
  #include "stm32_assert.h"
#else
  #define assert_param(expr) ((void)0U)
#endif
/** @addtogroup STM32G4xx_LL_Driver
  * @{
  */

/** @addtogroup RCC_LL
  * @{
  */

/* Private types -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private constants ---------------------------------------------------------*/
/* Private macros ------------------------------------------------------------*/
/** @addtogroup RCC_LL_Private_Macros
  * @{
  */
#define IS_LL_RCC_USART_CLKSOURCE(__VALUE__)  (((__VALUE__) == LL_RCC_USART1_CLKSOURCE) \
                                            || ((__VALUE__) == LL_RCC_USART2_CLKSOURCE) \
                                            || ((__VALUE__) == LL_RCC_USART3_CLKSOURCE))
#if defined(RCC_CCIPR_UART5SEL)
#define IS_LL_RCC_UART_CLKSOURCE(__VALUE__)    (((__VALUE__) == LL_RCC_UART4_CLKSOURCE) \
                                             || ((__VALUE__) == LL_RCC_UART5_CLKSOURCE))
#elif defined(RCC_CCIPR_UART4SEL)
#define IS_LL_RCC_UART_CLKSOURCE(__VALUE__)    ((__VALUE__) == LL_RCC_UART4_CLKSOURCE)
#endif /* RCC_CCIPR_UART5SEL*/

#define IS_LL_RCC_LPUART_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_LPUART1_CLKSOURCE))

#if defined(RCC_CCIPR2_I2C4SEL)
#define IS_LL_RCC_I2C_CLKSOURCE(__VALUE__)    (((__VALUE__) == LL_RCC_I2C1_CLKSOURCE) \
                                            || ((__VALUE__) == LL_RCC_I2C2_CLKSOURCE) \
                                            || ((__VALUE__) == LL_RCC_I2C3_CLKSOURCE) \
                                            || ((__VALUE__) == LL_RCC_I2C4_CLKSOURCE))

#else
#define IS_LL_RCC_I2C_CLKSOURCE(__VALUE__)    (((__VALUE__) == LL_RCC_I2C1_CLKSOURCE) \
                                            || ((__VALUE__) == LL_RCC_I2C2_CLKSOURCE) \
                                            || ((__VALUE__) == LL_RCC_I2C3_CLKSOURCE))
#endif /* RCC_CCIPR2_I2C4SEL */
#define IS_LL_RCC_LPTIM_CLKSOURCE(__VALUE__)  (((__VALUE__) == LL_RCC_LPTIM1_CLKSOURCE))

#define IS_LL_RCC_SAI_CLKSOURCE(__VALUE__)    ((__VALUE__) == LL_RCC_SAI1_CLKSOURCE)

#define IS_LL_RCC_I2S_CLKSOURCE(__VALUE__)    ((__VALUE__) == LL_RCC_I2S_CLKSOURCE)

#define IS_LL_RCC_RNG_CLKSOURCE(__VALUE__)    (((__VALUE__) == LL_RCC_RNG_CLKSOURCE))

#define IS_LL_RCC_USB_CLKSOURCE(__VALUE__)    (((__VALUE__) == LL_RCC_USB_CLKSOURCE))

#if defined(ADC345_COMMON)
#define IS_LL_RCC_ADC_CLKSOURCE(__VALUE__)    (((__VALUE__) == LL_RCC_ADC12_CLKSOURCE) \
                                            || ((__VALUE__) == LL_RCC_ADC345_CLKSOURCE))
#else
#define IS_LL_RCC_ADC_CLKSOURCE(__VALUE__)    (((__VALUE__) == LL_RCC_ADC12_CLKSOURCE))
#endif /* ADC345_COMMON */

#if defined(QUADSPI)
#define IS_LL_RCC_QUADSPI_CLKSOURCE(__VALUE__)  (((__VALUE__) == LL_RCC_QUADSPI_CLKSOURCE))
#endif /* QUADSPI */

#if defined(FDCAN1)
#define IS_LL_RCC_FDCAN_CLKSOURCE(__VALUE__)  (((__VALUE__) == LL_RCC_FDCAN_CLKSOURCE))
#endif /* FDCAN1 */

/**
  * @}
  */

/* Private function prototypes -----------------------------------------------*/
/** @defgroup RCC_LL_Private_Functions RCC Private functions
  * @{
  */
static uint32_t RCC_GetSystemClockFreq(void);
static uint32_t RCC_GetHCLKClockFreq(uint32_t SYSCLK_Frequency);
static uint32_t RCC_GetPCLK1ClockFreq(uint32_t HCLK_Frequency);
static uint32_t RCC_GetPCLK2ClockFreq(uint32_t HCLK_Frequency);
static uint32_t RCC_PLL_GetFreqDomain_SYS(void);
static uint32_t RCC_PLL_GetFreqDomain_ADC(void);
static uint32_t RCC_PLL_GetFreqDomain_48M(void);
/**
  * @}
  */


/* Exported functions --------------------------------------------------------*/
/** @addtogroup RCC_LL_Exported_Functions
  * @{
  */

/** @addtogroup RCC_LL_EF_Init
  * @{
  */

/**
  * @brief  Reset the RCC clock configuration to the default reset state.
  * @note   The default reset state of the clock configuration is given below:
  *         - HSI  ON and used as system clock source
  *         - HSE and PLL OFF
  *         - AHB, APB1 and APB2 prescaler set to 1.
  *         - CSS, MCO OFF
  *         - All interrupts disabled
  * @note   This function doesn't modify the configuration of the
  *         - Peripheral clocks
  *         - LSI, LSE and RTC clocks
  * @retval An ErrorStatus enumeration value:
  *          - SUCCESS: RCC registers are de-initialized
  *          - ERROR: not applicable
  */
ErrorStatus LL_RCC_DeInit(void)
{
  uint32_t vl_mask;

  /* Set HSION bit and wait for HSI READY bit */
  LL_RCC_HSI_Enable();
  while (LL_RCC_HSI_IsReady() == 0U)
  {}

  /* Set HSITRIM bits to reset value*/
  LL_RCC_HSI_SetCalibTrimming(0x40U);

  /* Reset whole CFGR register but keep HSI as system clock source */
  LL_RCC_WriteReg(CFGR, LL_RCC_SYS_CLKSOURCE_HSI);
  while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_HSI) {};

  /* Reset whole CR register but HSI in 2 steps in case HSEBYP is set */
  LL_RCC_WriteReg(CR, RCC_CR_HSION);
  LL_RCC_WriteReg(CR, RCC_CR_HSION);

  /* Wait for PLL READY bit to be reset */
  while (LL_RCC_PLL_IsReady() != 0U)
  {}

  /* Reset PLLCFGR register */
  LL_RCC_WriteReg(PLLCFGR, 16U << RCC_PLLCFGR_PLLN_Pos);

  /* Disable all interrupts */
  LL_RCC_WriteReg(CIER, 0x00000000U);

  /* Clear all interrupt flags */
  vl_mask = RCC_CICR_LSIRDYC | RCC_CICR_LSERDYC | RCC_CICR_HSIRDYC | RCC_CICR_HSERDYC | RCC_CICR_PLLRDYC | \
            RCC_CICR_HSI48RDYC | RCC_CICR_CSSC | RCC_CICR_LSECSSC;

  LL_RCC_WriteReg(CICR, vl_mask);

  /* Clear reset flags */
  LL_RCC_ClearResetFlags();

  return SUCCESS;
}

/**
  * @}
  */

/** @addtogroup RCC_LL_EF_Get_Freq
  * @brief  Return the frequencies of different on chip clocks;  System, AHB, APB1 and APB2 buses clocks
  *         and different peripheral clocks available on the device.
  * @note   If SYSCLK source is HSI, function returns values based on HSI_VALUE(**)
  * @note   If SYSCLK source is HSE, function returns values based on HSE_VALUE(***)
  * @note   If SYSCLK source is PLL, function returns values based on HSE_VALUE(***)
  *         or HSI_VALUE(**) multiplied/divided by the PLL factors.
  * @note   (**) HSI_VALUE is a constant defined in this file (default value
  *              16 MHz) but the real value may vary depending on the variations
  *              in voltage and temperature.
  * @note   (***) HSE_VALUE is a constant defined in this file (default value
  *               8 MHz), user has to ensure that HSE_VALUE is same as the real
  *               frequency of the crystal used. Otherwise, this function may
  *               have wrong result.
  * @note   The result of this function could be incorrect when using fractional
  *         value for HSE crystal.
  * @note   This function can be used by the user application to compute the
  *         baud-rate for the communication peripherals or configure other parameters.
  * @{
  */

/**
  * @brief  Return the frequencies of different on chip clocks;  System, AHB, APB1 and APB2 buses clocks
  * @note   Each time SYSCLK, HCLK, PCLK1 and/or PCLK2 clock changes, this function
  *         must be called to update structure fields. Otherwise, any
  *         configuration based on this function will be incorrect.
  * @param  RCC_Clocks pointer to a @ref LL_RCC_ClocksTypeDef structure which will hold the clocks frequencies
  * @retval None
  */
void LL_RCC_GetSystemClocksFreq(LL_RCC_ClocksTypeDef *RCC_Clocks)
{
  /* Get SYSCLK frequency */
  RCC_Clocks->SYSCLK_Frequency = RCC_GetSystemClockFreq();

  /* HCLK clock frequency */
  RCC_Clocks->HCLK_Frequency   = RCC_GetHCLKClockFreq(RCC_Clocks->SYSCLK_Frequency);

  /* PCLK1 clock frequency */
  RCC_Clocks->PCLK1_Frequency  = RCC_GetPCLK1ClockFreq(RCC_Clocks->HCLK_Frequency);

  /* PCLK2 clock frequency */
  RCC_Clocks->PCLK2_Frequency  = RCC_GetPCLK2ClockFreq(RCC_Clocks->HCLK_Frequency);
}

/**
  * @brief  Return USARTx clock frequency
  * @param  USARTxSource This parameter can be one of the following values:
  *         @arg @ref LL_RCC_USART1_CLKSOURCE
  *         @arg @ref LL_RCC_USART2_CLKSOURCE
  *         @arg @ref LL_RCC_USART3_CLKSOURCE
  *
  * @retval USART clock frequency (in Hz)
  *         - @ref  LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator (HSI or LSE) is not ready
  */
uint32_t LL_RCC_GetUSARTClockFreq(uint32_t USARTxSource)
{
  uint32_t usart_frequency = LL_RCC_PERIPH_FREQUENCY_NO;

  /* Check parameter */
  assert_param(IS_LL_RCC_USART_CLKSOURCE(USARTxSource));

  if (USARTxSource == LL_RCC_USART1_CLKSOURCE)
  {
    /* USART1CLK clock frequency */
    switch (LL_RCC_GetUSARTClockSource(USARTxSource))
    {
      case LL_RCC_USART1_CLKSOURCE_SYSCLK: /* USART1 Clock is System Clock */
        usart_frequency = RCC_GetSystemClockFreq();
        break;

      case LL_RCC_USART1_CLKSOURCE_HSI:    /* USART1 Clock is HSI Osc. */
        if (LL_RCC_HSI_IsReady() != 0U)
        {
          usart_frequency = HSI_VALUE;
        }
        break;

      case LL_RCC_USART1_CLKSOURCE_LSE:    /* USART1 Clock is LSE Osc. */
        if (LL_RCC_LSE_IsReady() != 0U)
        {
          usart_frequency = LSE_VALUE;
        }
        break;

      case LL_RCC_USART1_CLKSOURCE_PCLK2:  /* USART1 Clock is PCLK2 */
      default:
        usart_frequency = RCC_GetPCLK2ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
        break;
    }
  }
  else if (USARTxSource == LL_RCC_USART2_CLKSOURCE)
  {
    /* USART2CLK clock frequency */
    switch (LL_RCC_GetUSARTClockSource(USARTxSource))
    {
      case LL_RCC_USART2_CLKSOURCE_SYSCLK: /* USART2 Clock is System Clock */
        usart_frequency = RCC_GetSystemClockFreq();
        break;

      case LL_RCC_USART2_CLKSOURCE_HSI:    /* USART2 Clock is HSI Osc. */
        if (LL_RCC_HSI_IsReady() != 0U)
        {
          usart_frequency = HSI_VALUE;
        }
        break;

      case LL_RCC_USART2_CLKSOURCE_LSE:    /* USART2 Clock is LSE Osc. */
        if (LL_RCC_LSE_IsReady() != 0U)
        {
          usart_frequency = LSE_VALUE;
        }
        break;

      case LL_RCC_USART2_CLKSOURCE_PCLK1:  /* USART2 Clock is PCLK1 */
      default:
        usart_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
        break;
    }
  }
  else
  {
    if (USARTxSource == LL_RCC_USART3_CLKSOURCE)
    {
      /* USART3CLK clock frequency */
      switch (LL_RCC_GetUSARTClockSource(USARTxSource))
      {
        case LL_RCC_USART3_CLKSOURCE_SYSCLK: /* USART3 Clock is System Clock */
          usart_frequency = RCC_GetSystemClockFreq();
          break;

        case LL_RCC_USART3_CLKSOURCE_HSI:    /* USART3 Clock is HSI Osc. */
          if (LL_RCC_HSI_IsReady() != 0U)
          {
            usart_frequency = HSI_VALUE;
          }
          break;

        case LL_RCC_USART3_CLKSOURCE_LSE:    /* USART3 Clock is LSE Osc. */
          if (LL_RCC_LSE_IsReady() != 0U)
          {
            usart_frequency = LSE_VALUE;
          }
          break;

        case LL_RCC_USART3_CLKSOURCE_PCLK1:  /* USART3 Clock is PCLK1 */
        default:
          usart_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
          break;
      }
    }
  }
  return usart_frequency;
}

#if defined(RCC_CCIPR_UART4SEL)
/**
  * @brief  Return UARTx clock frequency
  * @param  UARTxSource This parameter can be one of the following values:
  *         @arg @ref LL_RCC_UART4_CLKSOURCE (*)
  *         @arg @ref LL_RCC_UART5_CLKSOURCE (*)
  *
  *         (*) value not defined in all devices.
  * @retval UART clock frequency (in Hz)
  *         - @ref  LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator (HSI or LSE) is not ready
  */
uint32_t LL_RCC_GetUARTClockFreq(uint32_t UARTxSource)
{
  uint32_t uart_frequency = LL_RCC_PERIPH_FREQUENCY_NO;

  /* Check parameter */
  assert_param(IS_LL_RCC_UART_CLKSOURCE(UARTxSource));

  if (UARTxSource == LL_RCC_UART4_CLKSOURCE)
  {
    /* UART4CLK clock frequency */
    switch (LL_RCC_GetUARTClockSource(UARTxSource))
    {
      case LL_RCC_UART4_CLKSOURCE_SYSCLK: /* UART4 Clock is System Clock */
        uart_frequency = RCC_GetSystemClockFreq();
        break;

      case LL_RCC_UART4_CLKSOURCE_HSI:    /* UART4 Clock is HSI Osc. */
        if (LL_RCC_HSI_IsReady() != 0U)
        {
          uart_frequency = HSI_VALUE;
        }
        break;

      case LL_RCC_UART4_CLKSOURCE_LSE:    /* UART4 Clock is LSE Osc. */
        if (LL_RCC_LSE_IsReady() != 0U)
        {
          uart_frequency = LSE_VALUE;
        }
        break;

      case LL_RCC_UART4_CLKSOURCE_PCLK1:  /* UART4 Clock is PCLK1 */
      default:
        uart_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
        break;
    }
  }

#if defined(RCC_CCIPR_UART5SEL)
  if (UARTxSource == LL_RCC_UART5_CLKSOURCE)
  {
    /* UART5CLK clock frequency */
    switch (LL_RCC_GetUARTClockSource(UARTxSource))
    {
      case LL_RCC_UART5_CLKSOURCE_SYSCLK: /* UART5 Clock is System Clock */
        uart_frequency = RCC_GetSystemClockFreq();
        break;

      case LL_RCC_UART5_CLKSOURCE_HSI:    /* UART5 Clock is HSI Osc. */
        if (LL_RCC_HSI_IsReady() != 0U)
        {
          uart_frequency = HSI_VALUE;
        }
        break;

      case LL_RCC_UART5_CLKSOURCE_LSE:    /* UART5 Clock is LSE Osc. */
        if (LL_RCC_LSE_IsReady() != 0U)
        {
          uart_frequency = LSE_VALUE;
        }
        break;

      case LL_RCC_UART5_CLKSOURCE_PCLK1:  /* UART5 Clock is PCLK1 */
      default:
        uart_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
        break;
    }
  }
#endif /* RCC_CCIPR_UART5SEL */

  return uart_frequency;
}
#endif /* RCC_CCIPR_UART4SEL */

/**
  * @brief  Return I2Cx clock frequency
  * @param  I2CxSource This parameter can be one of the following values:
  *         @arg @ref LL_RCC_I2C1_CLKSOURCE
  *         @arg @ref LL_RCC_I2C2_CLKSOURCE
  *         @arg @ref LL_RCC_I2C3_CLKSOURCE
  *         @arg @ref LL_RCC_I2C4_CLKSOURCE (*)
  *
  *         (*) value not defined in all devices.
  * @retval I2C clock frequency (in Hz)
  *         - @ref  LL_RCC_PERIPH_FREQUENCY_NO indicates that HSI oscillator is not ready
  */
uint32_t LL_RCC_GetI2CClockFreq(uint32_t I2CxSource)
{
  uint32_t i2c_frequency = LL_RCC_PERIPH_FREQUENCY_NO;

  /* Check parameter */
  assert_param(IS_LL_RCC_I2C_CLKSOURCE(I2CxSource));

  if (I2CxSource == LL_RCC_I2C1_CLKSOURCE)
  {
    /* I2C1 CLK clock frequency */
    switch (LL_RCC_GetI2CClockSource(I2CxSource))
    {
      case LL_RCC_I2C1_CLKSOURCE_SYSCLK: /* I2C1 Clock is System Clock */
        i2c_frequency = RCC_GetSystemClockFreq();
        break;

      case LL_RCC_I2C1_CLKSOURCE_HSI:    /* I2C1 Clock is HSI Osc. */
        if (LL_RCC_HSI_IsReady() != 0U)
        {
          i2c_frequency = HSI_VALUE;
        }
        break;

      case LL_RCC_I2C1_CLKSOURCE_PCLK1:  /* I2C1 Clock is PCLK1 */
      default:
        i2c_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
        break;
    }
  }
  else if (I2CxSource == LL_RCC_I2C2_CLKSOURCE)
  {
    /* I2C2 CLK clock frequency */
    switch (LL_RCC_GetI2CClockSource(I2CxSource))
    {
      case LL_RCC_I2C2_CLKSOURCE_SYSCLK: /* I2C2 Clock is System Clock */
        i2c_frequency = RCC_GetSystemClockFreq();
        break;

      case LL_RCC_I2C2_CLKSOURCE_HSI:    /* I2C2 Clock is HSI Osc. */
        if (LL_RCC_HSI_IsReady() != 0U)
        {
          i2c_frequency = HSI_VALUE;
        }
        break;

      case LL_RCC_I2C2_CLKSOURCE_PCLK1:  /* I2C2 Clock is PCLK1 */
      default:
        i2c_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
        break;
    }
  }
  else
  {
    if (I2CxSource == LL_RCC_I2C3_CLKSOURCE)
    {
      /* I2C3 CLK clock frequency */
      switch (LL_RCC_GetI2CClockSource(I2CxSource))
      {
        case LL_RCC_I2C3_CLKSOURCE_SYSCLK: /* I2C3 Clock is System Clock */
          i2c_frequency = RCC_GetSystemClockFreq();
          break;

        case LL_RCC_I2C3_CLKSOURCE_HSI:    /* I2C3 Clock is HSI Osc. */
          if (LL_RCC_HSI_IsReady() != 0U)
          {
            i2c_frequency = HSI_VALUE;
          }
          break;

        case LL_RCC_I2C3_CLKSOURCE_PCLK1:  /* I2C3 Clock is PCLK1 */
        default:
          i2c_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
          break;
      }
    }
#if defined(RCC_CCIPR2_I2C4SEL)
    else
    {
      if (I2CxSource == LL_RCC_I2C4_CLKSOURCE)
      {
        /* I2C4 CLK clock frequency */
        switch (LL_RCC_GetI2CClockSource(I2CxSource))
        {
          case LL_RCC_I2C4_CLKSOURCE_SYSCLK: /* I2C4 Clock is System Clock */
            i2c_frequency = RCC_GetSystemClockFreq();
            break;

          case LL_RCC_I2C4_CLKSOURCE_HSI:    /* I2C4 Clock is HSI Osc. */
            if (LL_RCC_HSI_IsReady() != 0U)
            {
              i2c_frequency = HSI_VALUE;
            }
            break;

          case LL_RCC_I2C4_CLKSOURCE_PCLK1:  /* I2C4 Clock is PCLK1 */
          default:
            i2c_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
            break;
        }
      }
    }
#endif /*RCC_CCIPR2_I2C4SEL*/
  }

  return i2c_frequency;
}


/**
  * @brief  Return LPUARTx clock frequency
  * @param  LPUARTxSource This parameter can be one of the following values:
  *         @arg @ref LL_RCC_LPUART1_CLKSOURCE
  * @retval LPUART clock frequency (in Hz)
  *         - @ref  LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator (HSI or LSE) is not ready
  */
uint32_t LL_RCC_GetLPUARTClockFreq(uint32_t LPUARTxSource)
{
  uint32_t lpuart_frequency = LL_RCC_PERIPH_FREQUENCY_NO;

  /* Check parameter */
  assert_param(IS_LL_RCC_LPUART_CLKSOURCE(LPUARTxSource));

  /* LPUART1CLK clock frequency */
  switch (LL_RCC_GetLPUARTClockSource(LPUARTxSource))
  {
    case LL_RCC_LPUART1_CLKSOURCE_SYSCLK: /* LPUART1 Clock is System Clock */
      lpuart_frequency = RCC_GetSystemClockFreq();
      break;

    case LL_RCC_LPUART1_CLKSOURCE_HSI:    /* LPUART1 Clock is HSI Osc. */
      if (LL_RCC_HSI_IsReady() != 0U)
      {
        lpuart_frequency = HSI_VALUE;
      }
      break;

    case LL_RCC_LPUART1_CLKSOURCE_LSE:    /* LPUART1 Clock is LSE Osc. */
      if (LL_RCC_LSE_IsReady() != 0U)
      {
        lpuart_frequency = LSE_VALUE;
      }
      break;

    case LL_RCC_LPUART1_CLKSOURCE_PCLK1:  /* LPUART1 Clock is PCLK1 */
    default:
      lpuart_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
      break;
  }

  return lpuart_frequency;
}

/**
  * @brief  Return LPTIMx clock frequency
  * @param  LPTIMxSource This parameter can be one of the following values:
  *         @arg @ref LL_RCC_LPTIM1_CLKSOURCE
  * @retval LPTIM clock frequency (in Hz)
  *         - @ref  LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator (HSI, LSI or LSE) is not ready
  */
uint32_t LL_RCC_GetLPTIMClockFreq(uint32_t LPTIMxSource)
{
  uint32_t lptim_frequency = LL_RCC_PERIPH_FREQUENCY_NO;

  /* Check parameter */
  assert_param(IS_LL_RCC_LPTIM_CLKSOURCE(LPTIMxSource));

  if (LPTIMxSource == LL_RCC_LPTIM1_CLKSOURCE)
  {
    /* LPTIM1CLK clock frequency */
    switch (LL_RCC_GetLPTIMClockSource(LPTIMxSource))
    {
      case LL_RCC_LPTIM1_CLKSOURCE_LSI:    /* LPTIM1 Clock is LSI Osc. */
        if (LL_RCC_LSI_IsReady() != 0U)
        {
          lptim_frequency = LSI_VALUE;
        }
        break;

      case LL_RCC_LPTIM1_CLKSOURCE_HSI:    /* LPTIM1 Clock is HSI Osc. */
        if (LL_RCC_HSI_IsReady() != 0U)
        {
          lptim_frequency = HSI_VALUE;
        }
        break;

      case LL_RCC_LPTIM1_CLKSOURCE_LSE:    /* LPTIM1 Clock is LSE Osc. */
        if (LL_RCC_LSE_IsReady() != 0U)
        {
          lptim_frequency = LSE_VALUE;
        }
        break;

      case LL_RCC_LPTIM1_CLKSOURCE_PCLK1:  /* LPTIM1 Clock is PCLK1 */
      default:
        lptim_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
        break;
    }
  }

  return lptim_frequency;
}

/**
  * @brief  Return SAIx clock frequency
  * @param  SAIxSource This parameter can be one of the following values:
  *         @arg @ref LL_RCC_SAI1_CLKSOURCE
  *
  * @retval SAI clock frequency (in Hz)
  *         - @ref  LL_RCC_PERIPH_FREQUENCY_NO indicates that PLL is not ready
  */
uint32_t LL_RCC_GetSAIClockFreq(uint32_t SAIxSource)
{
  uint32_t sai_frequency = LL_RCC_PERIPH_FREQUENCY_NO;

  /* Check parameter */
  assert_param(IS_LL_RCC_SAI_CLKSOURCE(SAIxSource));

  if (SAIxSource == LL_RCC_SAI1_CLKSOURCE)
  {
    /* SAI1CLK clock frequency */
    switch (LL_RCC_GetSAIClockSource(SAIxSource))
    {
      case LL_RCC_SAI1_CLKSOURCE_SYSCLK:      /* System clock used as SAI1 clock source */
        sai_frequency = RCC_GetSystemClockFreq();
        break;

      case LL_RCC_SAI1_CLKSOURCE_PLL:        /* PLL clock used as SAI1 clock source */
        if (LL_RCC_PLL_IsReady() != 0U)
        {
          sai_frequency = RCC_PLL_GetFreqDomain_48M();
        }
        break;

      case LL_RCC_SAI1_CLKSOURCE_PIN:          /* SAI1 Clock is External clock */
        sai_frequency = EXTERNAL_CLOCK_VALUE;
        break;

      case LL_RCC_SAI1_CLKSOURCE_HSI:        /* HSI clock used as SAI1 clock source */
      default:
        if (LL_RCC_HSI_IsReady() != 0U)
        {
          sai_frequency = HSI_VALUE;
        }
        break;

    }
  }

  return sai_frequency;
}

/**
  * @brief  Return I2Sx clock frequency
  * @param  I2SxSource This parameter can be one of the following values:
  *         @arg @ref LL_RCC_I2S_CLKSOURCE
  * @retval I2S clock frequency (in Hz)
  *         @arg @ref  LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator is not ready
  */
uint32_t LL_RCC_GetI2SClockFreq(uint32_t I2SxSource)
{
  uint32_t i2s_frequency = LL_RCC_PERIPH_FREQUENCY_NO;

  /* Check parameter */
  assert_param(IS_LL_RCC_I2S_CLKSOURCE(I2SxSource));

  if (I2SxSource == LL_RCC_I2S_CLKSOURCE)
  {
    /* I2S CLK clock frequency */
    switch (LL_RCC_GetI2SClockSource(I2SxSource))
    {
      case LL_RCC_I2S_CLKSOURCE_SYSCLK:  /* I2S Clock is System Clock */
        i2s_frequency = RCC_GetSystemClockFreq();
      break;

      case LL_RCC_I2S_CLKSOURCE_PLL:    /* I2S Clock is PLL"Q" */
      if (LL_RCC_PLL_IsReady() != 0U)
      {
        i2s_frequency = RCC_PLL_GetFreqDomain_48M();
      }
      break;

      case LL_RCC_I2S_CLKSOURCE_PIN:    /* I2S Clock is External clock */
        i2s_frequency = EXTERNAL_CLOCK_VALUE;
        break;

      case LL_RCC_I2S_CLKSOURCE_HSI:    /* I2S Clock is HSI */
      default:
        if (LL_RCC_HSI_IsReady() != 0U)
        {
          i2s_frequency = HSI_VALUE;
        }
      break;
      }
  }

  return i2s_frequency;
}

#if defined(FDCAN1)
/**
  * @brief  Return FDCAN kernel clock frequency
  * @param  FDCANxSource This parameter can be one of the following values:
  *         @arg @ref LL_RCC_FDCAN_CLKSOURCE
  * @retval FDCAN kernel clock frequency (in Hz)
  *         - @ref  LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator is not ready
  *         - @ref  LL_RCC_PERIPH_FREQUENCY_NA indicates that no clock source selected
  */
uint32_t LL_RCC_GetFDCANClockFreq(uint32_t FDCANxSource)
{
  uint32_t fdcan_frequency = LL_RCC_PERIPH_FREQUENCY_NO;

  /* Check parameter */
  assert_param(IS_LL_RCC_FDCAN_CLKSOURCE(FDCANxSource));

  /* FDCAN kernel clock frequency */
  switch (LL_RCC_GetFDCANClockSource(FDCANxSource))
  {
    case LL_RCC_FDCAN_CLKSOURCE_HSE:   /* HSE clock used as FDCAN kernel clock */
      if (LL_RCC_HSE_IsReady() != 0U)
      {
        fdcan_frequency = HSE_VALUE;
      }
      break;

    case LL_RCC_FDCAN_CLKSOURCE_PLL:   /* PLL clock used as FDCAN kernel clock */
      if (LL_RCC_PLL_IsReady() != 0U)
      {
        fdcan_frequency = RCC_PLL_GetFreqDomain_48M();
      }
      break;

    case LL_RCC_FDCAN_CLKSOURCE_PCLK1: /* PCLK1 clock used as FDCAN kernel clock */
      fdcan_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
      break;

    default:
      fdcan_frequency = LL_RCC_PERIPH_FREQUENCY_NA;
      break;
  }
  return fdcan_frequency;
}
#endif /* FDCAN1 */

/**
  * @brief  Return RNGx clock frequency
  * @param  RNGxSource This parameter can be one of the following values:
  *         @arg @ref LL_RCC_RNG_CLKSOURCE
  * @retval RNG clock frequency (in Hz)
  *         - @ref  LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator (HSI48) or PLL is not ready
  *         - @ref  LL_RCC_PERIPH_FREQUENCY_NA indicates that no clock source selected
  */
uint32_t LL_RCC_GetRNGClockFreq(uint32_t RNGxSource)
{
  uint32_t rng_frequency = LL_RCC_PERIPH_FREQUENCY_NO;

  /* Check parameter */
  assert_param(IS_LL_RCC_RNG_CLKSOURCE(RNGxSource));

  /* RNGCLK clock frequency */
  switch (LL_RCC_GetRNGClockSource(RNGxSource))
  {
    case LL_RCC_RNG_CLKSOURCE_PLL:           /* PLL clock used as RNG clock source */
      if (LL_RCC_PLL_IsReady() != 0U)
      {
        rng_frequency = RCC_PLL_GetFreqDomain_48M();
      }
      break;

    case LL_RCC_RNG_CLKSOURCE_HSI48:         /* HSI48 used as RNG clock source */
      if (LL_RCC_HSI48_IsReady() != 0U)
      {
        rng_frequency = HSI48_VALUE;
      }
      break;

    default:
      rng_frequency = LL_RCC_PERIPH_FREQUENCY_NA;
      break;

  }

  return rng_frequency;
}

/**
  * @brief  Return USBx clock frequency
  * @param  USBxSource This parameter can be one of the following values:
  *         @arg @ref LL_RCC_USB_CLKSOURCE
  * @retval USB clock frequency (in Hz)
  *         - @ref  LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator (HSI48) or PLL is not ready
  *         - @ref  LL_RCC_PERIPH_FREQUENCY_NA indicates that no clock source selected
  */
uint32_t LL_RCC_GetUSBClockFreq(uint32_t USBxSource)
{
  uint32_t usb_frequency = LL_RCC_PERIPH_FREQUENCY_NO;

  /* Check parameter */
  assert_param(IS_LL_RCC_USB_CLKSOURCE(USBxSource));

  /* USBCLK clock frequency */
  switch (LL_RCC_GetUSBClockSource(USBxSource))
  {
    case LL_RCC_USB_CLKSOURCE_PLL:           /* PLL clock used as USB clock source */
      if (LL_RCC_PLL_IsReady() != 0U)
      {
        usb_frequency = RCC_PLL_GetFreqDomain_48M();
      }
      break;

    case LL_RCC_USB_CLKSOURCE_HSI48:         /* HSI48 used as USB clock source */
      if (LL_RCC_HSI48_IsReady() != 0U)
      {
        usb_frequency = HSI48_VALUE;
      }
      break;

    default:
      usb_frequency = LL_RCC_PERIPH_FREQUENCY_NA;
      break;
  }

  return usb_frequency;
}

/**
  * @brief  Return ADCx clock frequency
  * @param  ADCxSource This parameter can be one of the following values:
  *         @arg @ref LL_RCC_ADC12_CLKSOURCE
  *         @arg @ref LL_RCC_ADC345_CLKSOURCE (*)
  *
  *         (*) value not defined in all devices.
  * @retval ADC clock frequency (in Hz)
  *         - @ref  LL_RCC_PERIPH_FREQUENCY_NO indicates that PLL is not ready
  *         - @ref  LL_RCC_PERIPH_FREQUENCY_NA indicates that no clock source selected
  */
uint32_t LL_RCC_GetADCClockFreq(uint32_t ADCxSource)
{
  uint32_t adc_frequency = LL_RCC_PERIPH_FREQUENCY_NO;

  /* Check parameter */
  assert_param(IS_LL_RCC_ADC_CLKSOURCE(ADCxSource));

  if (ADCxSource == LL_RCC_ADC12_CLKSOURCE)
  {
    /* ADC12CLK clock frequency */
    switch (LL_RCC_GetADCClockSource(ADCxSource))
    {
      case LL_RCC_ADC12_CLKSOURCE_PLL:       /* PLL clock used as ADC12 clock source */
        if (LL_RCC_PLL_IsReady() != 0U)
        {
          adc_frequency = RCC_PLL_GetFreqDomain_ADC();
        }
        break;

      case LL_RCC_ADC12_CLKSOURCE_SYSCLK:    /* System clock used as ADC12 clock source */
        adc_frequency = RCC_GetSystemClockFreq();
        break;

      case LL_RCC_ADC12_CLKSOURCE_NONE:        /* No clock used as ADC12 clock source */
      default:
        adc_frequency = LL_RCC_PERIPH_FREQUENCY_NA;
        break;
    }
  }
#if defined(ADC345_COMMON)
  else
  {
    /* ADC345CLK clock frequency */
    switch (LL_RCC_GetADCClockSource(ADCxSource))
    {
      case LL_RCC_ADC345_CLKSOURCE_PLL:       /* PLL clock used as ADC345 clock source */
        if (LL_RCC_PLL_IsReady() != 0U)
        {
          adc_frequency = RCC_PLL_GetFreqDomain_ADC();
        }
        break;

      case LL_RCC_ADC345_CLKSOURCE_SYSCLK:    /* System clock used as ADC345 clock source */
        adc_frequency = RCC_GetSystemClockFreq();
        break;

      case LL_RCC_ADC345_CLKSOURCE_NONE:        /* No clock used as ADC345 clock source */
      default:
        adc_frequency = LL_RCC_PERIPH_FREQUENCY_NA;
        break;
    }
  }
#endif /* ADC345_COMMON */

  return adc_frequency;
}

#if defined(QUADSPI)
/**
  * @brief  Return QUADSPI clock frequency
  * @param  QUADSPIxSource This parameter can be one of the following values:
  *         @arg @ref LL_RCC_QUADSPI_CLKSOURCE
  * @retval QUADSPI clock frequency (in Hz)
  *         - @ref  LL_RCC_PERIPH_FREQUENCY_NO indicates that no clock is configured
  */
uint32_t LL_RCC_GetQUADSPIClockFreq(uint32_t QUADSPIxSource)
{
  uint32_t quadspi_frequency = LL_RCC_PERIPH_FREQUENCY_NO;

  /* Check parameter */
  assert_param(IS_LL_RCC_QUADSPI_CLKSOURCE(QUADSPIxSource));

  /* QUADSPI clock frequency */
  switch (LL_RCC_GetQUADSPIClockSource(QUADSPIxSource))
  {
    case LL_RCC_QUADSPI_CLKSOURCE_SYSCLK:   /* SYSCLK used as QUADSPI source */
      quadspi_frequency = RCC_GetSystemClockFreq();
      break;

    case LL_RCC_QUADSPI_CLKSOURCE_HSI:      /* HSI clock used as QUADSPI source */
      if (LL_RCC_HSI_IsReady() != 0U)
      {
        quadspi_frequency = HSI_VALUE;
      }
      break;

    case LL_RCC_QUADSPI_CLKSOURCE_PLL:      /* PLL clock used as QUADSPI source */
      if (LL_RCC_PLL_IsReady() != 0U)
      {
        quadspi_frequency = RCC_PLL_GetFreqDomain_48M();
      }
      break;

    default:
      /* Nothing to do: quadspi frequency already initilalized to LL_RCC_PERIPH_FREQUENCY_NO */
      break;
  }

  return quadspi_frequency;
}
#endif /* QUADSPI */

/**
  * @}
  */

/**
  * @}
  */

/** @addtogroup RCC_LL_Private_Functions
  * @{
  */

/**
  * @brief  Return SYSTEM clock frequency
  * @retval SYSTEM clock frequency (in Hz)
  */
static uint32_t RCC_GetSystemClockFreq(void)
{
  uint32_t frequency;

  /* Get SYSCLK source -------------------------------------------------------*/
  switch (LL_RCC_GetSysClkSource())
  {
    case LL_RCC_SYS_CLKSOURCE_STATUS_HSI:  /* HSI used as system clock  source */
      frequency = HSI_VALUE;
      break;

    case LL_RCC_SYS_CLKSOURCE_STATUS_HSE:  /* HSE used as system clock  source */
      frequency = HSE_VALUE;
      break;

    case LL_RCC_SYS_CLKSOURCE_STATUS_PLL:  /* PLL used as system clock  source */
      frequency = RCC_PLL_GetFreqDomain_SYS();
      break;

    default:
      frequency = HSI_VALUE;
      break;
  }

  return frequency;
}

/**
  * @brief  Return HCLK clock frequency
  * @param  SYSCLK_Frequency SYSCLK clock frequency
  * @retval HCLK clock frequency (in Hz)
  */
static uint32_t RCC_GetHCLKClockFreq(uint32_t SYSCLK_Frequency)
{
  /* HCLK clock frequency */
  return __LL_RCC_CALC_HCLK_FREQ(SYSCLK_Frequency, LL_RCC_GetAHBPrescaler());
}

/**
  * @brief  Return PCLK1 clock frequency
  * @param  HCLK_Frequency HCLK clock frequency
  * @retval PCLK1 clock frequency (in Hz)
  */
static uint32_t RCC_GetPCLK1ClockFreq(uint32_t HCLK_Frequency)
{
  /* PCLK1 clock frequency */
  return __LL_RCC_CALC_PCLK1_FREQ(HCLK_Frequency, LL_RCC_GetAPB1Prescaler());
}

/**
  * @brief  Return PCLK2 clock frequency
  * @param  HCLK_Frequency HCLK clock frequency
  * @retval PCLK2 clock frequency (in Hz)
  */
static uint32_t RCC_GetPCLK2ClockFreq(uint32_t HCLK_Frequency)
{
  /* PCLK2 clock frequency */
  return __LL_RCC_CALC_PCLK2_FREQ(HCLK_Frequency, LL_RCC_GetAPB2Prescaler());
}

/**
  * @brief  Return PLL clock frequency used for system domain
  * @retval PLL clock frequency (in Hz)
  */
static uint32_t RCC_PLL_GetFreqDomain_SYS(void)
{
  uint32_t pllinputfreq, pllsource;

  /* PLL_VCO = (HSE_VALUE or HSI_VALUE / PLLM) * PLLN
     SYSCLK = PLL_VCO / PLLR
  */
  pllsource = LL_RCC_PLL_GetMainSource();

  switch (pllsource)
  {
    case LL_RCC_PLLSOURCE_HSI:  /* HSI used as PLL clock source */
      pllinputfreq = HSI_VALUE;
      break;

    case LL_RCC_PLLSOURCE_HSE:  /* HSE used as PLL clock source */
      pllinputfreq = HSE_VALUE;
      break;

    default:
      pllinputfreq = HSI_VALUE;
      break;
  }
  return __LL_RCC_CALC_PLLCLK_FREQ(pllinputfreq, LL_RCC_PLL_GetDivider(),
                                   LL_RCC_PLL_GetN(), LL_RCC_PLL_GetR());
}

/**
  * @brief  Return PLL clock frequency used for ADC domain
  * @retval PLL clock frequency (in Hz)
  */
static uint32_t RCC_PLL_GetFreqDomain_ADC(void)
{
  uint32_t pllinputfreq, pllsource;

  /* PLL_VCO = (HSE_VALUE or HSI_VALUE / PLLM) * PLLN
     ADC Domain clock = PLL_VCO / PLLP
  */
  pllsource = LL_RCC_PLL_GetMainSource();

  switch (pllsource)
  {
    case LL_RCC_PLLSOURCE_HSI:  /* HSI used as PLL clock source */
      pllinputfreq = HSI_VALUE;
      break;

    case LL_RCC_PLLSOURCE_HSE:  /* HSE used as PLL clock source */
      pllinputfreq = HSE_VALUE;
      break;

    default:
      pllinputfreq = HSI_VALUE;
      break;
  }
  return __LL_RCC_CALC_PLLCLK_ADC_FREQ(pllinputfreq, LL_RCC_PLL_GetDivider(),
                                        LL_RCC_PLL_GetN(), LL_RCC_PLL_GetP());
}

/**
  * @brief  Return PLL clock frequency used for 48 MHz domain
  * @retval PLL clock frequency (in Hz)
  */
static uint32_t RCC_PLL_GetFreqDomain_48M(void)
{
  uint32_t pllinputfreq, pllsource;

  /* PLL_VCO = (HSE_VALUE or HSI_VALUE / PLLM) * PLLN
     48M Domain clock = PLL_VCO / PLLQ
  */
  pllsource = LL_RCC_PLL_GetMainSource();

  switch (pllsource)
  {
    case LL_RCC_PLLSOURCE_HSI:  /* HSI used as PLL clock source */
      pllinputfreq = HSI_VALUE;
      break;

    case LL_RCC_PLLSOURCE_HSE:  /* HSE used as PLL clock source */
      pllinputfreq = HSE_VALUE;
      break;

    default:
      pllinputfreq = HSI_VALUE;
      break;
  }
  return __LL_RCC_CALC_PLLCLK_48M_FREQ(pllinputfreq, LL_RCC_PLL_GetDivider(),
                                        LL_RCC_PLL_GetN(), LL_RCC_PLL_GetQ());
}

/**
  * @}
  */

/**
  * @}
  */

/**
  * @}
  */

#endif /* USE_FULL_LL_DRIVER */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/