tests: drivers: build_all: regulator: add test

Add a new _test_ that is used to build all regulator drivers. SoC
regulators, such as Raspberry Pi Pico core supply are excluded as they
are typically built as part of the platform.

Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>

MAINTAINERS.yml

@@ -1133,6 +1133,7 @@ Release Notes:
     - include/zephyr/drivers/regulator.h
     - include/zephyr/dt-bindings/regulator/
     - tests/drivers/regulator/
+    - tests/drivers/build_all/regulator/
     - doc/hardware/peripherals/regulators.rst
   labels:
     - "area: Regulators"

tests/drivers/build_all/regulator/CMakeLists.txt

@@ -0,0 +1,8 @@
+# Copyright (c) 2023 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+cmake_minimum_required(VERSION 3.20.0)
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(build_all)
+
+target_sources(app PRIVATE src/main.c)

tests/drivers/build_all/regulator/app.overlay

@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2023 Nordic Semiconductor ASA
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	test {
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		test_i2c: i2c@11112222 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "vnd,i2c";
+			reg = <0x11112222 0x1000>;
+			status = "okay";
+			clock-frequency = <100000>;
+
+			#include "i2c.dtsi"
+		};
+
+		test_gpio: gpio@deadbeef {
+			compatible = "vnd,gpio";
+			gpio-controller;
+			reg = <0xdeadbeef 0x1000>;
+			#gpio-cells = <0x2>;
+			status = "okay";
+		};
+
+		#include "misc.dtsi"
+	};
+};

tests/drivers/build_all/regulator/i2c.dtsi

@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2023 Nordic Semiconductor ASA
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/****************************************
+ * PLEASE KEEP REG ADDRESSES SEQUENTIAL *
+ ***************************************/
+
+pca9420@0 {
+	compatible = "nxp,pca9420";
+	reg = <0x0>;
+
+	BUCK1 {};
+	BUCK2 {};
+	LDO1 {};
+	LDO2 {};
+};
+
+npm6001@1 {
+	compatible = "nordic,npm6001";
+	reg = <0x1>;
+
+	regulators {
+		compatible = "nordic,npm6001-regulator";
+
+		BUCK0 {};
+		BUCK1 {};
+		BUCK2 {};
+		BUCK3 {};
+		LDO0 {};
+		LDO1 {};
+	};
+};
+
+npm1300@2 {
+	compatible = "nordic,npm1300";
+	reg = <0x2>;
+
+	regulators {
+		compatible = "nordic,npm1300-regulator";
+
+		BUCK1 {};
+		BUCK2 {};
+		LDO1 {};
+		LDO2 {};
+	};
+};

tests/drivers/build_all/regulator/misc.dtsi

@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) 2023 Nordic Semiconductor ASA
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+regulator-fixed {
+	compatible = "regulator-fixed";
+	regulator-name = "test";
+	enable-gpios = <&test_gpio 0 GPIO_ACTIVE_HIGH>;
+};
+
+npm1100 {
+	compatible = "nordic,npm1100";
+
+	BUCK {};
+};

tests/drivers/build_all/regulator/prj.conf

@@ -0,0 +1 @@
+CONFIG_REGULATOR=y

tests/drivers/build_all/regulator/src/main.c

@@ -0,0 +1,9 @@
+/*
+ * Copyright (c) 2023 Nordic Semiconductor ASA
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+int main(void)
+{
+	return 0;
+}

tests/drivers/build_all/regulator/testcase.yaml

@@ -0,0 +1,10 @@
+# Copyright (c) 2023 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+tests:
+  drivers.regulator.build:
+    tags:
+      - drivers
+      - regulator
+    build_only: true
+    platform_allow: native_posix