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