drivers: serial: uart_stm32: tx/rx swap in init()

Previously, the uart_stm32 driver was extended in #44487 to support
swapping the tx and rx pins of supported STM32 UART peripherals.
However, the original change applied this configuration during the
call to the uart_stm32_configure() function. This has now been added to
the uart_stm32_init() function to ensure this behavior on startup for
ports like the virtual com port.

Signed-off-by: Peter Maxwell Warasila <madmaxwell@soundcomesout.com>

Author: warasilapm

drivers/serial/uart_stm32.c

@@ -473,12 +473,6 @@ static int uart_stm32_configure(const struct device *dev,
 		data->baud_rate = cfg->baudrate;
 	}
 
-#ifdef LL_USART_TXRX_SWAPPED
-	if (config->tx_rx_swap) {
-		LL_USART_SetTXRXSwap(config->usart, LL_USART_TXRX_SWAPPED);
-	}
-#endif
-
 	LL_USART_Enable(config->usart);
 	return 0;
 };
@@ -1612,6 +1606,12 @@ static int uart_stm32_init(const struct device *dev)
 		LL_USART_EnableHalfDuplex(config->usart);
 	}
 
+#ifdef LL_USART_TXRX_SWAPPED
+	if (config->tx_rx_swap) {
+		LL_USART_SetTXRXSwap(config->usart, LL_USART_TXRX_SWAPPED);
+	}
+#endif
+
 	LL_USART_Enable(config->usart);
 
 #ifdef USART_ISR_TEACK