tests: benchmarks: multicore: idle_uarte: Enable device runtime PM

Enable runtime PM for UART device is CONFIG_PM_DEVICE_RUNTIME=y.

Signed-off-by: Krzysztof Chruściński <[email protected]>

Author: nordic-krch

tests/benchmarks/multicore/idle_uarte/src/main.c

@@ -5,6 +5,7 @@
  */
 
 #include <zephyr/drivers/uart.h>
+#include <zephyr/pm/device_runtime.h>
 #include <zephyr/kernel.h>
 #include <zephyr/logging/log.h>
 
@@ -23,6 +24,7 @@ LOG_MODULE_REGISTER(idle_uarte);
 #define TEST_BUFFER_LEN		    10
 
 static const struct device *const uart_dev = DEVICE_DT_GET(UART_NODE);
+static const struct device *const console_dev = DEVICE_DT_GET(DT_CHOSEN(zephyr_console));
 
 const uint8_t test_pattern[TEST_BUFFER_LEN] = {0x11, 0x12, 0x13, 0x14, 0x15,
 					       0x16, 0x17, 0x18, 0x19, 0x20};
@@ -96,6 +98,11 @@ int main(void)
 		return -1;
 	}
 
+	if (IS_ENABLED(CONFIG_PM_DEVICE_RUNTIME)) {
+		pm_device_runtime_enable(uart_dev);
+		pm_device_runtime_enable(console_dev);
+	}
+
 	while (1) {
 		printk("Hello\n");