boards: shields: npm6001_ek: initial support

Add support for the nPM6001 Eval Kit.

Signed-off-by: Gerard Marull-Paretas <[email protected]>

Author: gmarull

boards/shields/npm6001_ek/Kconfig.defconfig

@@ -0,0 +1,12 @@
+# Copyright (c) 2022 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+if SHIELD_NPM6001_EK
+
+config GPIO
+	default y
+
+config WATCHDOG
+	default y
+
+endif # SHIELD_NPM6001_EK

boards/shields/npm6001_ek/Kconfig.shield

@@ -0,0 +1,5 @@
+# Copyright (c) 2022 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+config SHIELD_NPM6001_EK
+	def_bool $(shields_list_contains,npm6001_ek)

boards/shields/npm6001_ek/doc/index.rst

@@ -0,0 +1,36 @@
+.. _npm6001_ek:
+
+nPM6001 EK
+##########
+
+Overview
+********
+
+The nPM6001 EK lets you test different functions and features of the nPM6001
+Power Management Integrated Circuit (PMIC).
+
+.. figure:: npm6001_ek.jpg
+   :alt: nPM6001 EK
+   :align: center
+
+   nPM6001 EK
+
+Requirements
+************
+
+The nPM6001 EK board is not designed to fit straight into an Arduino connector.
+However, the Zephyr shield is designed expecting it to be connected to the
+Arduino shield connectors. For example, the I2C lines need to be connected to
+the ``arduino_i2c`` bus. This allows to use the shield with any host board that
+supports the Arduino connector.
+
+Usage
+*****
+
+The shield can be used in any application by setting ``SHIELD`` to
+``npm6001_ek``.
+
+References
+**********
+
+- `nPM6001 EK Manual <https://infocenter.nordicsemi.com/topic/ug_npm6001_ek/UG/nPM6001_EK/intro.html>`_

boards/shields/npm6001_ek/doc/npm6001_ek.jpg

@@ -0,0 +1,22 @@
+/*
+ * Copyright (C) 2022 Nordic Semiconductor ASA
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&arduino_i2c {
+	npm6001_ek_pmic: pmic@70 {
+		compatible = "nordic,npm6001";
+		reg = <0x70>;
+
+		npm6001_ek_gpio: gpio-controller {
+			compatible = "nordic,npm6001-gpio";
+			gpio-controller;
+			#gpio-cells = <2>;
+			ngpios = <3>;
+		};
+
+		npm6001_ek_wdt: watchdog {
+			compatible = "nordic,npm6001-wdt";
+		};
+	};
+};