components/esp_system/port/include/esp_clk_internal.h (ESP-IDF)

/* * SPDX-FileCopyrightText: 2015-2024 Espressif Systems (Shanghai) CO LTD * * SPDX-License-Identifier: Apache-2.0 */ #pragma once #include "sdkconfig.h" #ifdef __cplusplus extern "C" { #endif /** * @file esp_clk_internal.h * * Private clock-related functions */ /** * @brief Initialize rtc-related settings * * Called from cpu_start.c, not intended to be called from other places. * This function configures the power related stuff. * After this the MSPI timing tuning can be done. */ void esp_rtc_init(void); /** * @brief Initialize clock-related settings * * Called from cpu_start.c, not intended to be called from other places. * This function configures the CPU clock, RTC slow and fast clocks, and * performs RTC slow clock calibration. */ void esp_clk_init(void); /** * @brief Disables clock of some peripherals * * Called from cpu_start.c, not intended to be called from other places. * This function disables clock of useless peripherals when cpu starts. */ void esp_perip_clk_init(void); #if !CONFIG_IDF_TARGET_ESP32C2 /* Selects an external clock source (32 kHz) for RTC. * Only internal use in unit test. */ void rtc_clk_select_rtc_slow_clk(void); #endif #ifdef __cplusplus } #endif