oe-selftest: add new ext dtb recipe

There is no test coverage for the devicetree.bbclass class. Add a
minimalist recipe that uses this class.
This recipe compiles a devicetree overlay that does not include any
sources from the kernel build folder to keep it simple and also usable
for testing a kernel from the sstate-cache.

(From OE-Core rev: 44b6eaf9fb408f2a7941e7ba8f2156cf2c7d4bae)

Signed-off-by: Adrian Freihofer <adrian.freihofer@siemens.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

3 files changed, 92 insertions, 0 deletions

diff --git a/meta-selftest/recipes-test/ext-dtb/bbb-dtbs-as-ext.bb b/meta-selftest/recipes-test/ext-dtb/bbb-dtbs-as-ext.bb
new file mode 100644
index 0000000000..5055d03e54
--- /dev/null
+++ b/meta-selftest/recipes-test/ext-dtb/bbb-dtbs-as-ext.bb
@@ -0,0 +1,29 @@
+SUMMARY = "Boeaglebone Devicetrees"
+DESCRIPTION = "Handle the dtc files of the beaglebone-yocto via devicetree.bbclass just for testing purpose"
+SECTION = "kernel"
+LICENSE = "MIT"
+LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4f302"
+
+inherit devicetree
+
+COMPATIBLE_MACHINE  = "^(beaglebone-yocto)$"
+
+# Take a copy of a small devicetree from the kernel's source directory for handling it externally
+# Borrowed an example DTB overlay from
+# https://raw.githubusercontent.com/beagleboard/linux/refs/heads/5.10/arch/arm/boot/dts/overlays/BBORG_RELAY-00A2.dts
+SRC_URI = "\
+    file://am335x-bonegreen-ext.dts \
+    file://BBORG_RELAY-00A2.dts \
+"
+
+# The am335x-bonegreen-ext.dts needs also the ti directories
+DT_INCLUDE:append = " ${STAGING_KERNEL_DIR}/arch/${ARCH}/boot/dts/ti/omap"
+
+# Sym-links are handled as extra configuration nodes in FIT images.
+do_install:append() {
+    ln -sf am335x-bonegreen-ext.dtb "${D}/boot/devicetree/am335x-bonegreen-ext-alias.dtb"
+}
+
+do_deploy:append() {
+    ln -sf am335x-bonegreen-ext.dtb "${DEPLOYDIR}/devicetree/am335x-bonegreen-ext-alias.dtb"
+}
diff --git a/meta-selftest/recipes-test/ext-dtb/files/BBORG_RELAY-00A2.dts b/meta-selftest/recipes-test/ext-dtb/files/BBORG_RELAY-00A2.dts
new file mode 100644
index 0000000000..9530fa50fe
--- /dev/null
+++ b/meta-selftest/recipes-test/ext-dtb/files/BBORG_RELAY-00A2.dts
@@ -0,0 +1,49 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2015 Robert Nelson <robertcnelson@gmail.com>
+ * Copyright (C) 2019 Amilcar Lucas <amilcar.lucas@iav.de>
+ */
+
+/dts-v1/;
+/plugin/;
+
+&{/chosen} {
+        overlays {
+                BBORG_RELAY-00A2.kernel = __TIMESTAMP__;
+        };
+};
+
+&ocp {
+        P9_41_pinmux { pinctrl-0 = <&P9_41_gpio_pin>;};
+        P9_42_pinmux { pinctrl-0 = <&P9_42_gpio_pin>;};
+        P9_30_pinmux { pinctrl-0 = <&P9_30_gpio_pin>;};
+        P9_27_pinmux { pinctrl-0 = <&P9_27_gpio_pin>;};
+};
+
+// relay1
+&bone_led_P9_41 {
+        status = "okay";
+        label = "relay1";
+        default-state = "keep";
+};
+
+// relay2
+&bone_led_P9_42 {
+        status = "okay";
+        label = "relay2";
+        default-state = "keep";
+};
+
+// realy3
+&bone_led_P9_30 {
+        status = "okay";
+        label = "relay3";
+        default-state = "keep";
+};
+
+// realy4
+&bone_led_P9_27 {
+        status = "okay";
+        label = "relay4";
+        default-state = "keep";
+};
diff --git a/meta-selftest/recipes-test/ext-dtb/files/am335x-bonegreen-ext.dts b/meta-selftest/recipes-test/ext-dtb/files/am335x-bonegreen-ext.dts
new file mode 100644
index 0000000000..a0b39337a9
--- /dev/null
+++ b/meta-selftest/recipes-test/ext-dtb/files/am335x-bonegreen-ext.dts
@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2012 Texas Instruments Incorporated - https://www.ti.com/
+ */
+/dts-v1/;
+
+#include "am33xx.dtsi"
+#include "am335x-bone-common.dtsi"
+#include "am335x-bonegreen-common.dtsi"
+
+/ {
+        model = "TI AM335x BeagleBone Green External";
+        compatible = "ti,am335x-bone-green", "ti,am335x-bone-black", "ti,am335x-bone", "ti,am33xx";
+};