tests: drivers: uart async with DMA on stm32fx nucleo144 boards

It enables the usart6 to run the testcase with a DMA
tests/drivers/uart/uart_async_api. DMA2 (of type V1)
is configured on channel 5 (request) streams 7 & 2.
USART Tx and Rx PG14 - PG9 pins (14 & 16 of CN10)
are connected to PASS the test.

Signed-off-by: Francois Ramu <[email protected]>

Author: FRASTM

tests/drivers/uart/uart_async_api/boards/nucleo_f207zg.overlay

@@ -0,0 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 */
+
+&usart6 {
+	dmas = <&dma2 7 5 0x28440 0x03>,
+		<&dma2 2 5 0x28480 0x03>;
+	dma-names = "tx", "rx";
+};

tests/drivers/uart/uart_async_api/boards/nucleo_f429zi.overlay

@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: Apache-2.0 */
+
+&usart6 {
+	dmas = <&dma2 7 5 0x28440 0x03>,
+		<&dma2 2 5 0x28480 0x03>;
+	dma-names = "tx", "rx";
+};
+
+&dma2 {
+	status = "okay";
+};

tests/drivers/uart/uart_async_api/boards/stm32f3_disco.overlay

@@ -0,0 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 */
+
+&usart2 {
+	dmas = <&dma1 7 0x440>,
+		<&dma1 6 0x480>;
+	dma-names = "tx", "rx";
+};

tests/drivers/uart/uart_async_api/src/test_uart.h

@@ -35,13 +35,17 @@
 #elif defined(CONFIG_BOARD_NUCLEO_L4R5ZI) || \
 	defined(CONFIG_BOARD_NUCLEO_L152RE)
 #define UART_DEVICE_NAME DT_LABEL(DT_NODELABEL(usart3))
+#elif defined(CONFIG_BOARD_NUCLEO_F429ZI) || \
+	defined(CONFIG_BOARD_NUCLEO_F207ZG)
+#define UART_DEVICE_NAME DT_LABEL(DT_NODELABEL(usart6))
 #elif defined(CONFIG_BOARD_DISCO_L475_IOT1)
 #define UART_DEVICE_NAME DT_LABEL(DT_NODELABEL(uart4))
 #elif defined(CONFIG_BOARD_NUCLEO_L552ZE_Q)
 #define UART_DEVICE_NAME DT_LABEL(DT_NODELABEL(usart3))
 #elif defined(CONFIG_BOARD_STM32L562E_DK)
 #define UART_DEVICE_NAME DT_LABEL(DT_NODELABEL(usart3))
-#elif defined(CONFIG_BOARD_NUCLEO_H723ZG)
+#elif defined(CONFIG_BOARD_NUCLEO_H723ZG) || \
+	defined(CONFIG_BOARD_STM32F3_DISCO)
 #define UART_DEVICE_NAME DT_LABEL(DT_NODELABEL(usart2))
 #else
 #define UART_DEVICE_NAME DT_LABEL(DT_CHOSEN(zephyr_console))