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fix(uart): lp uart rx iomux pin was not working as expected

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Introduced in 8818157e42
The workaround in the commit routes the signal to LP GPIO matrix first.
When uses LP IOMUX pin as UART RX, the signal did not bypass the matrix,
which caused the issue.

This commit adds rtc_gpio_iomux_input and rtc_gpio_iomux_output APIs
to align with existing GPIO driver APIs.
This commit is contained in:
Song Ruo Jing
2026-04-09 17:07:01 +08:00
parent 57ad8c89ab
commit 9c2a8281c1
8 changed files with 138 additions and 16 deletions
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components/esp_driver_gpio/src/rtc_io.c
+18
View File
@@ -191,6 +191,24 @@ esp_err_t rtc_gpio_iomux_func_sel(gpio_num_t gpio_num, int func)
return ESP_OK;
}
esp_err_t rtc_gpio_iomux_input(gpio_num_t gpio_num, int func, uint32_t signal_idx)
{
ESP_RETURN_ON_FALSE(rtc_gpio_is_valid_gpio(gpio_num), ESP_ERR_INVALID_ARG, RTCIO_TAG, "RTCIO number error");
RTCIO_ENTER_CRITICAL();
rtcio_hal_iomux_input(rtc_io_number_get(gpio_num), func, signal_idx);
RTCIO_EXIT_CRITICAL();
return ESP_OK;
}
esp_err_t rtc_gpio_iomux_output(gpio_num_t gpio_num, int func)
{
ESP_RETURN_ON_FALSE(rtc_gpio_is_valid_gpio(gpio_num), ESP_ERR_INVALID_ARG, RTCIO_TAG, "RTCIO number error");
RTCIO_ENTER_CRITICAL();
rtcio_hal_iomux_output(rtc_io_number_get(gpio_num), func);
RTCIO_EXIT_CRITICAL();
return ESP_OK;
}
#if SOC_LP_GPIO_MATRIX_SUPPORTED
esp_err_t lp_gpio_connect_in_signal(gpio_num_t gpio_num, uint32_t signal_idx, bool inv)
{