The CONFIG_BLK conversion involves quite invasive changes in the U-Boot
code, with #ifdefs and different code paths. We should try to move over to
this soon so we can drop the old code.

Set a deadline of 9 months for this work, rounded up to the next release.

Signed-off-by: Simon Glass <>

 doc/driver-model/MIGRATION.txt | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 doc/driver-model/MIGRATION.txt

diff --git a/doc/driver-model/MIGRATION.txt b/doc/driver-model/MIGRATION.txt
new file mode 100644
index 0000000000..d2fe027249
--- /dev/null
+++ b/doc/driver-model/MIGRATION.txt
@@ -0,0 +1,20 @@
+Migration Schedule
+U-Boot has been migrating to a new driver model since its introduction in
+2014. This file describes the schedule for deprecation of pre-driver-model
+Status: In progress
+Deadline: 2018.05
+Maintainers should submit patches for enabling CONFIG_BLK on all boards in
+time for inclusion in the 2018.05 release. Boards not converted by this
+time may be removed in a subsequent release.
+Note that this implies use of driver model for all block devices (e.g.

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