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由 Simon Glass 提交于
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: NSimon Glass <sjg@chromium.org>
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