Hi,

indexed caching was removed from regmap (commit 4c691664583ef6a91f9ed0e08a75fbd30a5ffd5c)
saying:

    There should be no situation where it offers any advantage over rbtree
    and there are no current users so remove the code for simplicity.

What about devices having just a few registers (4 in my case)? I'd think
there are a number of such devices not yet converted to regmap. Is it
assumed that the additional overhead from rbtree-caching will make up
for the code saved?

Regards,

   Wolfram

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