kopia lustrzana https://github.com/espressif/esp-idf
33 wiersze
936 B
C
33 wiersze
936 B
C
/*
|
|
* SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
#include "freertos/FreeRTOS.h"
|
|
#include "esp_private/io_mux.h"
|
|
#include "hal/gpio_ll.h"
|
|
|
|
static portMUX_TYPE s_io_mux_spinlock = portMUX_INITIALIZER_UNLOCKED;
|
|
static soc_module_clk_t s_io_mux_clk_src = 0; // by default, the clock source is not set explicitly by any consumer (e.g. SDM, Filter)
|
|
|
|
esp_err_t io_mux_set_clock_source(soc_module_clk_t clk_src)
|
|
{
|
|
bool clk_conflict = false;
|
|
// check is the IO MUX has been set to another clock source
|
|
portENTER_CRITICAL(&s_io_mux_spinlock);
|
|
if (s_io_mux_clk_src != 0 && s_io_mux_clk_src != clk_src) {
|
|
clk_conflict = true;
|
|
} else {
|
|
s_io_mux_clk_src = clk_src;
|
|
}
|
|
portEXIT_CRITICAL(&s_io_mux_spinlock);
|
|
|
|
if (clk_conflict) {
|
|
return ESP_ERR_INVALID_STATE;
|
|
}
|
|
|
|
gpio_ll_iomux_set_clk_src(clk_src);
|
|
return ESP_OK;
|
|
}
|