linux-ti-*: Add filtering for which dtb/dtbo to include

We often carry more dtbs/dtbos in our kernel than we have upstreamed.
The inclusion of all of the dtb/dtbo in the KERNEL_DEVICETREE has become
problematic as we start testing the linux-next and 6.1 as part of our
LTS migration.  To address this issue we are adding in two step method
for managing the KERNEL_DEVICETREE.

Going forward we will only accept dtb/dtbo in KERNEL_DEVICETREE if it is
available in upstream.  This way we ensure that the variable is more
accurate for whichever kernel you might be looking at.  We have also
added a new variable KERNEL_DEVICETREE_PREFIX which our kernel recipes
will use to auto set KERNEL_DEVICETREE based on what files are in the
kernel and not a fixed list in the conf files.

Signed-off-by: Ryan Eatmon <reatmon@ti.com>
Signed-off-by: Andrew Davis <afd@ti.com>
Signed-off-by: Ryan Eatmon <reatmon@ti.com>

1 files changed, 22 insertions, 0 deletions

diff --git a/meta-ti-bsp/recipes-kernel/linux/ti-kernel-devicetree-prefix.inc b/meta-ti-bsp/recipes-kernel/linux/ti-kernel-devicetree-prefix.inc
new file mode 100644
index 00000000..1496a749
--- /dev/null
+++ b/meta-ti-bsp/recipes-kernel/linux/ti-kernel-devicetree-prefix.inc
@@ -0,0 +1,22 @@
+
+def get_dtbs_from_kernel(dts_dir, dts_prefix):
+    import os
+    import glob
+    matches = []
+
+    for prefix in dts_prefix.split():
+        filenames = glob.glob(dts_dir + prefix + '*.dts')
+        filenames += glob.glob(dts_dir + prefix + '*.dtso')
+        for filename in filenames:
+            # Before v6.2 kernels DTB Overlays shared the same name as DTB files
+            # so we need to search the file to find the type
+            with open(filename) as f:
+                file_postfix = '.dtbo' if '/plugin/;' in f.read() else '.dtb'
+            filename = os.path.split(filename)[1]
+            filename = os.path.splitext(filename)[0] + file_postfix
+            filename = os.path.join(os.path.split(prefix)[0], filename)
+            matches.append(filename)
+    return ' '.join(matches)
+
+KERNEL_DEVICETREE = "${@get_dtbs_from_kernel('${S}/arch/${ARCH}/boot/dts/', '${KERNEL_DEVICETREE_PREFIX}')} ${KERNEL_DEVICETREE_DTBMERGE}"
+