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Revert "[uart] Fix UART on default UART0 pins for ESP-IDF (#12519)"

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This reverts commit 1897551b28.
This commit is contained in:
J. Nick Koston
2026-02-27 13:34:12 -10:00
parent 5a00455b34
commit 0efa547143
1 changed files with 4 additions and 17 deletions
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esphome/components/uart/uart_component_esp_idf.cpp
+4 -17
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@@ -9,7 +9,6 @@
#include "esphome/core/gpio.h"
#include "driver/gpio.h"
#include "soc/gpio_num.h"
#include "soc/uart_pins.h"
#ifdef USE_LOGGER
#include "esphome/components/logger/logger.h"
@@ -142,22 +141,6 @@ void IDFUARTComponent::load_settings(bool dump_config) {
return;
}
int8_t tx = this->tx_pin_ != nullptr ? this->tx_pin_->get_pin() : -1;
int8_t rx = this->rx_pin_ != nullptr ? this->rx_pin_->get_pin() : -1;
int8_t flow_control = this->flow_control_pin_ != nullptr ? this->flow_control_pin_->get_pin() : -1;
// Workaround for ESP-IDF issue: https://github.com/espressif/esp-idf/issues/17459
// Commit 9ed617fb17 removed gpio_func_sel() calls from uart_set_pin(), which breaks
// UART on default UART0 pins that may have residual state from boot console.
// Reset these pins before configuring UART to ensure they're in a clean state.
if (tx == U0TXD_GPIO_NUM || tx == U0RXD_GPIO_NUM) {
gpio_reset_pin(static_cast<gpio_num_t>(tx));
}
if (rx == U0TXD_GPIO_NUM || rx == U0RXD_GPIO_NUM) {
gpio_reset_pin(static_cast<gpio_num_t>(rx));
}
// Setup pins after reset to preserve open drain/pullup/pulldown flags
auto setup_pin_if_needed = [](InternalGPIOPin *pin) {
if (!pin) {
return;
@@ -173,6 +156,10 @@ void IDFUARTComponent::load_settings(bool dump_config) {
setup_pin_if_needed(this->tx_pin_);
}
int8_t tx = this->tx_pin_ != nullptr ? this->tx_pin_->get_pin() : -1;
int8_t rx = this->rx_pin_ != nullptr ? this->rx_pin_->get_pin() : -1;
int8_t flow_control = this->flow_control_pin_ != nullptr ? this->flow_control_pin_->get_pin() : -1;
uint32_t invert = 0;
if (this->tx_pin_ != nullptr && this->tx_pin_->is_inverted()) {
invert |= UART_SIGNAL_TXD_INV;