tests: uart_basic_api: uart_elementary: Get baudrate from device tree

Add option (BAUDRATE_FROM_DTS) to get baudrate value from
device tree, for devices which differ from standard (115200).

Signed-off-by: Raffael Rostagno <[email protected]>

Author: Raffael Rostagno

tests/drivers/uart/uart_basic_api/src/test_uart_config.c

@@ -26,7 +26,7 @@
 
 #include "test_uart.h"
 const struct uart_config uart_cfg = {
-		.baudrate = 115200,
+		.baudrate = DT_PROP_OR(DT_CHOSEN(zephyr_console), current_speed, 115200),
 		.parity = UART_CFG_PARITY_NONE,
 		.stop_bits = UART_CFG_STOP_BITS_1,
 		.data_bits = UART_CFG_DATA_BITS_8,

tests/drivers/uart/uart_basic_api/src/test_uart_config_wide.c

@@ -26,7 +26,7 @@
 
 #include "test_uart.h"
 const struct uart_config uart_cfg_wide = {
-		.baudrate = 115200,
+		.baudrate = DT_PROP_OR(DT_NODELABEL(dut), current_speed, 115200),
 		.parity = UART_CFG_PARITY_NONE,
 		.stop_bits = UART_CFG_STOP_BITS_1,
 		.data_bits = UART_CFG_DATA_BITS_9,

tests/drivers/uart/uart_elementary/Kconfig

@@ -8,4 +8,12 @@ config DUAL_UART_TEST
 config SETUP_MISMATCH_TEST
 	bool "Enable mismatched configuration in dual UART test"
 
+config UART_BAUDRATE_MISMATCH
+	int "UART baudrate for DUT_AUX to test mismatch case"
+	depends on SETUP_MISMATCH_TEST
+	default 9600
+	help
+	  UART baudrate for DUT_AUX that is intentionally different from DUT
+	  to test error detection.
+
 source "Kconfig.zephyr"

tests/drivers/uart/uart_elementary/src/main.c

@@ -30,6 +30,8 @@
 #define SLEEP_TIME_US 1000
 #define TEST_BUFFER_LEN 10
 
+#define UART_BAUDRATE DT_PROP_OR(UART_NODE, current_speed, 115200)
+
 static const struct device *const uart_dev = DEVICE_DT_GET(UART_NODE);
 
 const uint8_t test_pattern[TEST_BUFFER_LEN] = { 0x11, 0x12, 0x13, 0x14, 0x15,
@@ -135,7 +137,7 @@ ZTEST(uart_elementary, test_uart_proper_configuration)
 
 	int err;
 	struct uart_config test_expected_uart_config;
-	struct uart_config test_uart_config = { .baudrate = 115200,
+	struct uart_config test_uart_config = { .baudrate = UART_BAUDRATE,
 						.parity = UART_CFG_PARITY_NONE,
 						.stop_bits = UART_CFG_STOP_BITS_1,
 						.data_bits = UART_CFG_DATA_BITS_8,
@@ -176,7 +178,7 @@ ZTEST(uart_elementary, test_uart_improper_configuration)
 	Z_TEST_SKIP_IFDEF(CONFIG_DUAL_UART_TEST);
 
 	int err;
-	struct uart_config test_uart_config = { .baudrate = 115200,
+	struct uart_config test_uart_config = { .baudrate = UART_BAUDRATE,
 						.parity = 7,
 						.stop_bits = UART_CFG_STOP_BITS_1,
 						.data_bits = UART_CFG_DATA_BITS_8,
@@ -196,7 +198,7 @@ ZTEST(uart_elementary, test_uart_improper_configuration)
 ZTEST(uart_elementary, test_uart_basic_transmission)
 {
 	int err;
-	struct uart_config test_uart_config = { .baudrate = 115200,
+	struct uart_config test_uart_config = { .baudrate = UART_BAUDRATE,
 						.parity = UART_CFG_PARITY_ODD,
 						.stop_bits = UART_CFG_STOP_BITS_1,
 						.data_bits = UART_CFG_DATA_BITS_8,
@@ -233,14 +235,14 @@ ZTEST(uart_elementary, test_uart_basic_transmission)
 ZTEST(uart_elementary, test_uart_dual_port_transmission)
 {
 	int err;
-	struct uart_config test_uart_config = { .baudrate = 115200,
+	struct uart_config test_uart_config = { .baudrate = UART_BAUDRATE,
 						.parity = UART_CFG_PARITY_EVEN,
 						.stop_bits = UART_CFG_STOP_BITS_2,
 						.data_bits = UART_CFG_DATA_BITS_8,
 						.flow_ctrl = UART_CFG_FLOW_CTRL_NONE };
 
 #if defined(CONFIG_SETUP_MISMATCH_TEST)
-	struct uart_config test_uart_config_aux = { .baudrate = 9600,
+	struct uart_config test_uart_config_aux = { .baudrate = CONFIG_UART_BAUDRATE_MISMATCH,
 						    .parity = UART_CFG_PARITY_EVEN,
 						    .stop_bits = UART_CFG_STOP_BITS_2,
 						    .data_bits = UART_CFG_DATA_BITS_8,