boards: shields: Add Adafruit LTR-329 light sensor shield

The product photo is from https://learn.adafruit.com/assets/115230

Tested with the commmand mentioned in the index.rst file.

Compilation testing in CI of the overlay file is done via the
light_polling sample.

Signed-off-by: Jonas Berg <[email protected]>

Author: pyhys

boards/shields/adafruit_ltr329/Kconfig.shield

@@ -0,0 +1,5 @@
+# Copyright (c) 2025 Jonas Berg
+# SPDX-License-Identifier: Apache-2.0
+
+config SHIELD_ADAFRUIT_LTR329
+	def_bool $(shields_list_contains,adafruit_ltr329)

boards/shields/adafruit_ltr329/adafruit_ltr329.overlay

@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2025 Jonas Berg
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	aliases {
+		light-sensor = &adafruit_ltr329;
+	};
+};
+
+&zephyr_i2c {
+	status = "okay";
+
+	adafruit_ltr329: ltr329@29 {
+		compatible = "liteon,ltr329";
+		reg = <0x29>;
+	};
+};

boards/shields/adafruit_ltr329/doc/adafruit_ltr329.webp

@@ -0,0 +1,59 @@
+.. _adafruit_ltr329:
+
+Adafruit LTR-329 Shield
+#######################
+
+
+Overview
+********
+
+The `Adafruit LTR-329 Light Sensor Shield`_ features a `LiteOn LTR-329ALS-01 Digital Light Sensor`_
+and two STEMMA QT connectors.
+
+.. figure:: adafruit_ltr329.webp
+   :align: center
+   :alt: Adafruit LTR-329 Shield
+
+   Adafruit LTR-329 Shield (Credit: Adafruit)
+
+
+Requirements
+************
+
+This shield can be used with boards which provide an I2C connector, for example STEMMA QT or
+Qwiic connectors. The target board must define a ``zephyr_i2c`` node label. See :ref:`shields` for
+more details.
+
+
+Pin Assignments
+===============
+
++--------------+-----------------------+
+| Shield Pin   | Function              |
++==============+=======================+
+| SDA          | LTR-329 I2C SDA       |
++--------------+-----------------------+
+| SCL          | LTR-329 I2C SCL       |
++--------------+-----------------------+
+
+See :dtcompatible:`liteon,ltr329` for documentation on how to adjust the devicetree file, to for
+example adjust the integration time.
+
+
+Programming
+***********
+
+Set ``--shield adafruit_ltr329`` when you invoke ``west build``.  For example when running the
+:zephyr:code-sample:`light_sensor_polling` light measurement sample:
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/sensor/light_polling
+   :board: adafruit_metro_rp2040
+   :shield: adafruit_ltr329
+   :goals: build
+
+.. _Adafruit LTR-329 Light Sensor Shield:
+   https://learn.adafruit.com/adafruit-ltr-329-ltr-303
+
+.. _LiteOn LTR-329ALS-01 Digital Light Sensor:
+   https://optoelectronics.liteon.com/upload/download/DS86-2014-0006/LTR-329ALS-01_DS_V1.8.PDF

boards/shields/adafruit_ltr329/doc/index.rst

@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: Apache-2.0
+#
+# Copyright (c) 2025, Jonas Berg
+
+shield:
+  name: adafruit_ltr329
+  full_name: Adafruit LTR-329 Light Sensor Shield
+  vendor: adafruit
+  supported_features:
+    - sensor

boards/shields/adafruit_ltr329/shield.yml

@@ -31,14 +31,17 @@ tests:
       - adafruit_feather_canbus_rp2040/rp2040
       - mikroe_clicker_ra4m1/r7fa4m1ab3cfm
       - mikroe_quail/stm32f427xx
+      - adafruit_metro_rp2040/rp2040
     platform_allow:
       - frdm_mcxw71/mcxw716c
       - adafruit_qt_py_rp2040/rp2040       # adafruit_tsl2591 shield
       - adafruit_feather_canbus_rp2040/rp2040 # adafruit_veml7700 shield
       - mikroe_clicker_ra4m1/r7fa4m1ab3cfm # mikroe_ambient_2_click shield
       - mikroe_quail/stm32f427xx           # mikroe_illuminance_click shield
+      - adafruit_metro_rp2040/rp2040       # adafruit_ltr329 shield
     extra_args:
       - platform:adafruit_qt_py_rp2040/rp2040:SHIELD="adafruit_tsl2591"
       - platform:adafruit_feather_canbus_rp2040/rp2040:SHIELD="adafruit_veml7700"
       - platform:mikroe_clicker_ra4m1/r7fa4m1ab3cfm:SHIELD="mikroe_ambient_2_click"
       - platform:mikroe_quail/stm32f427xx:SHIELD="mikroe_illuminance_click"
+      - platform:adafruit_metro_rp2040/rp2040:SHIELD="adafruit_ltr329"