snippets: silabs-pti: Add snippet to enable Packet Trace Interface

Add snippet that can be used to enable packet trace output from
Silicon Labs Series 2 devices.

Signed-off-by: Aksel Skauge Mellbye <aksel.mellbye@silabs.com>

MAINTAINERS.yml

@@ -3691,6 +3691,7 @@ Silabs Platforms:
     - drivers/*/*/*silabs*
     - drivers/*/*/*siwx91x*
     - tests/boards/silabs/
+    - snippets/*silabs*/
   labels:
     - "platform: Silabs"
 

snippets/silabs-pti/README.rst

@@ -0,0 +1,21 @@
+.. _silabs-pti:
+
+Silicon Labs Packet Trace Interface (silabs-pti)
+################################################
+
+Overview
+********
+
+This snippet allows users to build Zephyr applications for Silicon Labs Series 2 devices
+where radio packets are emitted over the Packet Trace Interface for use by debugging tools.
+
+.. code-block:: console
+
+   west build -S silabs-pti [...]
+
+Requirements
+************
+
+Hardware support for :dtcompatible:`silabs,pti`.
+
+A pinctrl configuration with nodelabel ``pti_default`` containing PTI pinout.

snippets/silabs-pti/pti.conf

@@ -0,0 +1,4 @@
+# Copyright (c) 2024 Silicon Laboratories Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_DEBUG_DRIVER=y

snippets/silabs-pti/pti.overlay

@@ -0,0 +1,11 @@
+/*
+ * Copyright (c) 2025 Silicon Laboratories Inc.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&pti {
+	pinctrl-0 = <&pti_default>;
+	pinctrl-names = "default";
+	status = "okay";
+};

snippets/silabs-pti/snippet.yml

@@ -0,0 +1,4 @@
+name: silabs-pti
+append:
+  EXTRA_CONF_FILE: pti.conf
+  EXTRA_DTC_OVERLAY_FILE: pti.overlay