blob: 92c012403b7011f53217821feb9e0da99fab8d2a [file] [log] [blame]
/*
*
* Copyright (c) 2017 Linaro Limited.
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <soc.h>
#include <soc_registers.h>
#include <clock_control.h>
#include <misc/util.h>
#include <clock_control/stm32_clock_control.h>
#include "stm32_ll_clock.h"
#ifdef CONFIG_CLOCK_STM32_SYSCLK_SRC_PLL
/*
* Select PLL source for STM32F1 Connectivity line devices (STM32F105xx and
* STM32F107xx).
* Both flags are defined in STM32Cube LL API. Keep only the selected one.
*/
#ifdef CONFIG_CLOCK_STM32_PLL_SRC_PLL2
#undef RCC_PREDIV1_SOURCE_HSE
#else
#undef RCC_PREDIV1_SOURCE_PLL2
#endif /* CONFIG_CLOCK_STM32_PLL_SRC_PLL2 */
/**
* @brief fill in pll configuration structure
*/
void config_pll_init(LL_UTILS_PLLInitTypeDef *pllinit)
{
/*
* PLLMUL on SOC_STM32F10X_DENSITY_DEVICE
* 2 -> LL_RCC_PLL_MUL_2 -> 0x00000000
* 3 -> LL_RCC_PLL_MUL_3 -> 0x00040000
* 4 -> LL_RCC_PLL_MUL_4 -> 0x00080000
* ...
* 16 -> LL_RCC_PLL_MUL_16 -> 0x00380000
*
* PLLMUL on SOC_STM32F10X_CONNECTIVITY_LINE_DEVICE
* 4 -> LL_RCC_PLL_MUL_4 -> 0x00080000
* ...
* 9 -> LL_RCC_PLL_MUL_9 -> 0x001C0000
* 13 -> LL_RCC_PLL_MUL_6_5 -> 0x00340000
*/
pllinit->PLLMul = ((CONFIG_CLOCK_STM32_PLL_MULTIPLIER - 2)
<< RCC_CFGR_PLLMULL_Pos);
#ifdef CONFIG_SOC_STM32F10X_DENSITY_DEVICE
/* PLL prediv */
#ifdef CONFIG_CLOCK_STM32_PLL_XTPRE
/*
* SOC_STM32F10X_DENSITY_DEVICE:
* PLLXPTRE (depends on PLL source HSE)
* HSE/2 used as PLL source
*/
pllinit->Prediv = LL_RCC_PREDIV_DIV_2;
#else
/*
* SOC_STM32F10X_DENSITY_DEVICE:
* PLLXPTRE (depends on PLL source HSE)
* HSE used as direct PLL source
*/
pllinit->Prediv = LL_RCC_PREDIV_DIV_1;
#endif /* CONFIG_CLOCK_STM32_PLL_XTPRE */
#else
/*
* SOC_STM32F10X_CONNECTIVITY_LINE_DEVICE
* 1 -> LL_RCC_PREDIV_DIV_1 -> 0x00000000
* 2 -> LL_RCC_PREDIV_DIV_2 -> 0x00000001
* 3 -> LL_RCC_PREDIV_DIV_3 -> 0x00000002
* ...
* 16 -> LL_RCC_PREDIV_DIV_16 -> 0x0000000F
*/
pllinit->Prediv = CONFIG_CLOCK_STM32_PLL_PREDIV1 - 1;
#endif /* CONFIG_SOC_STM32F10X_DENSITY_DEVICE */
}
#endif /* CONFIG_CLOCK_STM32_SYSCLK_SRC_PLL */
/**
* @brief Activate default clocks
*/
void config_enable_default_clocks(void)
{
/* Nothing for now */
}
/**
* @brief Function kept for driver genericity
*/
void LL_RCC_MSI_Disable(void)
{
/* Do nothing */
}