regmap: Allow rbtree to cache zero default values
authorMark Brown <broonie@opensource.wolfsonmicro.com>
Sun, 9 Oct 2011 13:30:02 +0000 (14:30 +0100)
committerMark Brown <broonie@opensource.wolfsonmicro.com>
Mon, 10 Oct 2011 09:25:00 +0000 (10:25 +0100)
Ensure that when we start up in cache only mode we can store defaults of
zero, otherwise if the hardware is unavailable we won't be able to read.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>

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