[nrf fromlist] samples: mbox: Align to NO MULTITHREADING

Removed k_sleep dependencies in non-multithreaded runs.

Signed-off-by: Jakub Zymelka <[email protected]>

Upstream PR: zephyrproject-rtos/zephyr#73857

Author: jaz1-nordic

samples/drivers/mbox/remote/src/main.c

@@ -51,17 +51,20 @@ int main(void)
 	printk("Maximum TX channels: %d\n", mbox_max_channels_get_dt(&tx_channel));
 
 	while (1) {
+#if defined(CONFIG_MULTITHREADING)
+		k_sleep(K_MSEC(3000));
+#else
+		k_busy_wait(3000000);
+#endif
+
 		printk("Ping (on channel %d)\n", tx_channel.channel_id);
 
 		ret = mbox_send_dt(&tx_channel, NULL);
 		if (ret < 0) {
 			printk("Could not send (%d)\n", ret);
 			return 0;
 		}
-
-		k_sleep(K_MSEC(3000));
 	}
 #endif /* CONFIG_TX_ENABLED */
-
 	return 0;
 }

samples/drivers/mbox/sample.yaml

@@ -82,3 +82,38 @@ tests:
       regex:
         - "Ping \\(on channel 16\\)"
         - "Pong \\(on channel 15\\)"
+
+  sample.drivers.mbox.nrf54l15_no_multithreading:
+    platform_allow:
+      - nrf54l15pdk/nrf54l15/cpuapp
+    integration_platforms:
+      - nrf54l15pdk/nrf54l15/cpuapp
+    extra_args:
+      mbox_SNIPPET=nordic-flpr
+      mbox_CONFIG_MULTITHREADING=n
+      remote_CONFIG_MULTITHREADING=n
+    sysbuild: true
+    harness: console
+    harness_config:
+      type: multi_line
+      ordered: false
+      regex:
+        - "Ping \\(on channel 16\\)"
+        - "Pong \\(on channel 15\\)"
+
+  sample.drivers.mbox.nrf54l15_remote_no_multithreading:
+    platform_allow:
+      - nrf54l15pdk/nrf54l15/cpuapp
+    integration_platforms:
+      - nrf54l15pdk/nrf54l15/cpuapp
+    extra_args:
+      mbox_SNIPPET=nordic-flpr
+      remote_CONFIG_MULTITHREADING=n
+    sysbuild: true
+    harness: console
+    harness_config:
+      type: multi_line
+      ordered: false
+      regex:
+        - "Ping \\(on channel 16\\)"
+        - "Pong \\(on channel 15\\)"

samples/drivers/mbox/src/main.c

@@ -47,7 +47,11 @@ int main(void)
 	printk("Maximum TX channels: %d\n", mbox_max_channels_get_dt(&tx_channel));
 
 	while (1) {
+#if defined(CONFIG_MULTITHREADING)
 		k_sleep(K_MSEC(2000));
+#else
+		k_busy_wait(2000000);
+#endif
 
 		printk("Ping (on channel %d)\n", tx_channel.channel_id);