diff --git a/components/esp_driver_uart/include/driver/uart.h b/components/esp_driver_uart/include/driver/uart.h
index 1c6623a597..cf30c9ada3 100644
--- a/components/esp_driver_uart/include/driver/uart.h
+++ b/components/esp_driver_uart/include/driver/uart.h
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2015-2025 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2015-2026 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -364,7 +364,7 @@ esp_err_t uart_enable_rx_intr(uart_port_t uart_num);
 esp_err_t uart_disable_rx_intr(uart_port_t uart_num);
 
 /**
- * @brief Disable UART TX interrupt (TX_FULL & TX_TIMEOUT INTERRUPT)
+ * @brief Disable UART TX interrupt (TX_FIFO_EMPTY INTERRUPT)
  *
  * @param uart_num  UART port number
  *
@@ -375,11 +375,11 @@ esp_err_t uart_disable_rx_intr(uart_port_t uart_num);
 esp_err_t uart_disable_tx_intr(uart_port_t uart_num);
 
 /**
- * @brief Enable UART TX interrupt (TX_FULL & TX_TIMEOUT INTERRUPT)
+ * @brief Enable UART TX interrupt (TX_FIFO_EMPTY INTERRUPT)
  *
  * @param uart_num UART port number, the max port number is (UART_NUM_MAX -1).
- * @param enable  1: enable; 0: disable
- * @param thresh  Threshold of TX interrupt, 0 ~ UART_HW_FIFO_LEN(uart_num)
+ * @param enable  Set to 1 to enable the interrupt
+ * @param thresh  Threshold of TX FIFO empty interrupt, 0 ~ UART_HW_FIFO_LEN(uart_num). If -1 is given, threshold configuration will be skipped.
  *
  * @return
  *     - ESP_OK   Success
diff --git a/components/esp_driver_uart/src/uart.c b/components/esp_driver_uart/src/uart.c
index eddd248928..9ecca3abaa 100644
--- a/components/esp_driver_uart/src/uart.c
+++ b/components/esp_driver_uart/src/uart.c
@@ -693,11 +693,14 @@ esp_err_t uart_disable_tx_intr(uart_port_t uart_num)
 
 esp_err_t uart_enable_tx_intr(uart_port_t uart_num, int enable, int thresh)
 {
+    (void)enable;
     ESP_RETURN_ON_FALSE((uart_num < UART_NUM_MAX), ESP_FAIL, UART_TAG, "uart_num error");
     ESP_RETURN_ON_FALSE((thresh < UART_HW_FIFO_LEN(uart_num)), ESP_FAIL, UART_TAG, "empty intr threshold error");
     uart_hal_clr_intsts_mask(&(uart_context[uart_num].hal), UART_INTR_TXFIFO_EMPTY);
     UART_ENTER_CRITICAL(&(uart_context[uart_num].spinlock));
-    uart_hal_set_txfifo_empty_thr(&(uart_context[uart_num].hal), thresh);
+    if (thresh != -1) {
+        uart_hal_set_txfifo_empty_thr(&(uart_context[uart_num].hal), thresh);
+    }
     uart_hal_ena_intr_mask(&(uart_context[uart_num].hal), UART_INTR_TXFIFO_EMPTY);
     UART_EXIT_CRITICAL(&(uart_context[uart_num].spinlock));
     return ESP_OK;
@@ -1651,7 +1654,7 @@ static int uart_tx_all(uart_port_t uart_num, const char *src, size_t size, bool
                 xRingbufferSend(p_uart_obj[uart_num]->tx_ring_buf, (void *)(src + offset), send_size, portMAX_DELAY);
                 size -= send_size;
                 offset += send_size;
-                uart_enable_tx_intr(uart_num, 1, UART_THRESHOLD_NUM(uart_num, UART_EMPTY_THRESH_DEFAULT));
+                uart_enable_tx_intr(uart_num, 1, -1);
             }
         }
     } else {
@@ -1661,7 +1664,7 @@ static int uart_tx_all(uart_port_t uart_num, const char *src, size_t size, bool
                 uint32_t sent = uart_enable_tx_write_fifo(uart_num, (const uint8_t *) src, size);
                 if (sent < size) {
                     p_uart_obj[uart_num]->tx_waiting_fifo = true;
-                    uart_enable_tx_intr(uart_num, 1, UART_THRESHOLD_NUM(uart_num, UART_EMPTY_THRESH_DEFAULT));
+                    uart_enable_tx_intr(uart_num, 1, -1);
                 }
                 size -= sent;
                 src += sent;