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108 lines
2.4 KiB
108 lines
2.4 KiB
/* |
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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 <stm32_ll_bus.h> |
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#include <stm32_ll_rcc.h> |
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#include <stm32_ll_utils.h> |
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#include <drivers/clock_control.h> |
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#include <sys/util.h> |
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#include <drivers/clock_control/stm32_clock_control.h> |
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#include "clock_stm32_ll_common.h" |
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#if 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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#if 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 /* 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 = ((STM32_PLL_MULTIPLIER - 2) |
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<< RCC_CFGR_PLLMULL_Pos); |
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#if STM32_PLL_SRC_HSI |
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/* In case PLL source is HSI, prediv is 2 */ |
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pllinit->Prediv = LL_RCC_PREDIV_DIV_2; |
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#else |
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/* In case PLL source is not HSI, set prediv case by case */ |
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#ifdef CONFIG_SOC_STM32F10X_DENSITY_DEVICE |
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/* PLL prediv */ |
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#if 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 /* 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 = STM32_PLL_PREDIV - 1; |
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#endif /* CONFIG_SOC_STM32F10X_DENSITY_DEVICE */ |
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#endif /* STM32_PLL_SRC_HSI */ |
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} |
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#endif /* 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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