82 lines
1.9 KiB
C
82 lines
1.9 KiB
C
/*
|
|
*
|
|
* 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: STM32F070x6, STM32F070xB and STM32F030xC */
|
|
/* cf Reference manual for more details */
|
|
#if defined(CONFIG_CLOCK_STM32_PLL_SRC_HSI)
|
|
pllinit->PLLDiv = LL_RCC_PLLSOURCE_HSI;
|
|
#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 */
|
|
}
|