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authorMichael Tretter <m.tretter@pengutronix.de>2019-09-13 15:14:40 +0200
committerSascha Hauer <s.hauer@pengutronix.de>2019-09-16 09:06:18 +0200
commitda2c36c0a911992d80448f9afa5acc9d70871ed0 (patch)
tree6be756dc6c1a8c4cd5ef56d4281f1d5b0e083315 /Documentation
parentbbd241efa5ae048cd7a96c5b232e729b9180e6f2 (diff)
downloadbarebox-da2c36c0a911992d80448f9afa5acc9d70871ed0.tar.gz
blspec: add support for devicetree overlays
Read the devicetree-overlay property from the blspec entry and register the overlays when booting the blspec entry. Do not fail the boot if an overlay cannot be loaded, because if Linux fails to boot without an overlay, the base device tree is broken. Signed-off-by: Michael Tretter <m.tretter@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/user/booting-linux.rst4
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/user/booting-linux.rst b/Documentation/user/booting-linux.rst
index 437f4e8..12cd505 100644
--- a/Documentation/user/booting-linux.rst
+++ b/Documentation/user/booting-linux.rst
@@ -232,6 +232,10 @@ device where the entry is found on. This makes it possible to use the same rootf
image on different devices without having to specify a different root= option each
time.
+Additionally to the options defined in the original spec, Barebox has the
+``devicetree-overlay`` option. This is a string value that refer to overlays
+that will be applied to the device tree before passing it to Linux.
+
Network boot
------------