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48 lines
1.7 KiB
C
48 lines
1.7 KiB
C
/*
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* SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#pragma once
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#include "esp_err.h"
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#include "soc/clk_tree_defs.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief Degree of precision of frequency value to be returned by esp_clk_tree_src_get_freq_hz()
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*/
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typedef enum {
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ESP_CLK_TREE_SRC_FREQ_PRECISION_CACHED, /*< Get value from the data cached by the driver; If the data is 0, then a calibration will be performed */
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ESP_CLK_TREE_SRC_FREQ_PRECISION_APPROX, /*< Get its approxiamte frequency value */
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ESP_CLK_TREE_SRC_FREQ_PRECISION_EXACT, /*< Always perform a calibration */
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ESP_CLK_TREE_SRC_FREQ_PRECISION_INVALID, /*< Invalid degree of precision */
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} esp_clk_tree_src_freq_precision_t;
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/**
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* @brief Get frequency of module clock source
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*
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* @param[in] clk_src Clock source available to modules, in soc_module_clk_t
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* @param[in] precision Degree of precision, one of esp_clk_tree_src_freq_precision_t values
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* This arg only applies to the clock sources that their frequencies can vary:
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* SOC_MOD_CLK_RTC_FAST, SOC_MOD_CLK_RTC_SLOW, SOC_MOD_CLK_RC_FAST, SOC_MOD_CLK_RC_FAST_D256,
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* SOC_MOD_CLK_XTAL32K
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* For other clock sources, this field is ignored.
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* @param[out] freq_value Frequency of the clock source, in Hz
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*
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* @return
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* - ESP_OK Success
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* - ESP_ERR_INVALID_ARG Parameter error
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* - ESP_FAIL Calibration failed
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*/
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esp_err_t esp_clk_tree_src_get_freq_hz(soc_module_clk_t clk_src, esp_clk_tree_src_freq_precision_t precision,
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uint32_t *freq_value);
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#ifdef __cplusplus
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}
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#endif
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