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/*
*
* Copyright (c) 2019 Ilya Tagunov
* Copyright (c) 2019 STMicroelectronics
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <soc.h>
#include <stm32_ll_bus.h>
#include <stm32_ll_crs.h>
#include <stm32_ll_rcc.h>
#include <stm32_ll_utils.h>
#include <zephyr/drivers/clock_control.h>
#include <zephyr/sys/util.h>
#include <zephyr/drivers/clock_control/stm32_clock_control.h>
#include "clock_stm32_ll_common.h"
#if defined(STM32_PLL_ENABLED)
/**
* @brief Return PLL source
*/
__unused
static uint32_t get_pll_source(void)
{
/* Configure PLL source */
if (IS_ENABLED(STM32_PLL_SRC_HSI)) {
return LL_RCC_PLLSOURCE_HSI;
} else if (IS_ENABLED(STM32_PLL_SRC_HSE)) {
return LL_RCC_PLLSOURCE_HSE;
}
__ASSERT(0, "Invalid source");
return 0;
}
/**
* @brief get the pll source frequency
*/
__unused
uint32_t get_pllsrc_frequency(void)
{
if (IS_ENABLED(STM32_PLL_SRC_HSI)) {
return STM32_HSI_FREQ;
} else if (IS_ENABLED(STM32_PLL_SRC_HSE)) {
return STM32_HSE_FREQ;
}
__ASSERT(0, "Invalid source");
return 0;
}
/**
* @brief Set up pll configuration
*/
__unused
void config_pll_sysclock(void)
{
LL_RCC_PLL_ConfigDomain_SYS(get_pll_source(),
pllm(STM32_PLL_M_DIVISOR),
STM32_PLL_N_MULTIPLIER,
pllr(STM32_PLL_R_DIVISOR));
LL_RCC_PLL_EnableDomain_SYS();
}
#endif /* defined(STM32_PLL_ENABLED) */
/**
* @brief Activate default clocks
*/
void config_enable_default_clocks(void)
{
/* Enable the power interface clock */
LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_PWR);
#if defined(CRS)
if (IS_ENABLED(STM32_HSI48_CRS_USB_SOF)) {
LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_CRS);
/*
* After reset the CRS configuration register
* (CRS_CFGR) value corresponds to an USB SOF
* synchronization. FIXME: write it anyway.
*/
LL_CRS_EnableAutoTrimming();
LL_CRS_EnableFreqErrorCounter();
}
#endif /* defined(CRS) */
}