tree 7fcd658cc520499f136add1e46643152618e9bf6
parent eff766868b662f1b0400866086f632f6ed715da8
author Simon Glass <sjg@chromium.org> 1440975316 -0600
committer Simon Glass <sjg@chromium.org> 1441250903 -0600

dm: Improve handling of a missing uclass

When a uclass definition is missing, no drivers in that uclass can operate.
This can happen if a board has a strange collection of options (e.g. the
driver is enabled but the uclass is not).

Unfortunately this is very confusing at present. Starting up driver model
results in a -ENOENT error, which is pretty generic. Quite a big of digging
is needed to get to the root cause.

To help with this, change the error to a very strange one with no other
users in U-Boot. Also add a debug message.

Signed-off-by: Simon Glass <sjg@chromium.org>