| /* |
| * |
| * 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 |
| |
| /** |
| * @brief fill in pll configuration structure |
| */ |
| void config_pll_init(LL_UTILS_PLLInitTypeDef *pllinit) |
| { |
| /* |
| * PLL MUL |
| * 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 |
| */ |
| pllinit->PLLMul = ((CONFIG_CLOCK_STM32_PLL_MULTIPLIER - 2) |
| << RCC_CFGR_PLLMUL_Pos); |
| #if defined(RCC_PLLSRC_PREDIV1_SUPPORT) |
| /* PREDIV support is a specific RCC configuration present on */ |
| /* following SoCs: STM32F302XE, STM32F303xE and STM32F398xx */ |
| /* cf Reference manual for more details */ |
| #if defined(CONFIG_CLOCK_STM32_PLL_SRC_HSI) |
| pllinit->PLLDiv = LL_RCC_PLLSOURCE_HSI_DIV_2; |
| #else |
| /* |
| * PLL DIV |
| * 1 -> LL_RCC_PLLSOURCE_HSE_DIV_1 -> 0x00010000 |
| * 2 -> LL_RCC_PLLSOURCE_HSE_DIV_2 -> 0x00010001 |
| * 3 -> LL_RCC_PLLSOURCE_HSE_DIV_3 -> 0x00010002 |
| * ... |
| * 16 -> LL_RCC_PLLSOURCE_HSE_DIV_16 -> 0x0001000F |
| */ |
| pllinit->PLLDiv = (RCC_CFGR_PLLSRC_HSE_PREDIV | |
| (CONFIG_CLOCK_STM32_PLL_PREDIV1 - 1)); |
| #endif /* CONFIG_CLOCK_STM32_PLL_SRC_HSI */ |
| #else |
| /* |
| * PLL Prediv |
| * 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_PREDIV - 1; |
| #endif /* RCC_PLLSRC_PREDIV1_SUPPORT */ |
| } |
| |
| #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 */ |
| } |