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regmap: Add the indexed cache support

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This is the simplest form of a cache available in regcache.  Any
registers whose default value is 0 are ignored.  If any of those
registers are modified in the future, they will be placed in the
cache on demand.  The cache layout is essentially using the provided
register defaults by the regcache core directly and does not re-map
it to another representation.

Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Dimitris Papastamos 2011-09-19 14:34:01 +01:00 • committed by Mark Brown
parent 9fabe24e9b
commit 195af65ca9
5 changed files with 69 additions and 1 deletions
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include/linux/regmap.h
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@ -23,6 +23,7 @@ struct spi_device;
/* An enum of all the supported cache types */
enum regcache_type {
REGCACHE_NONE,
REGCACHE_INDEXED,
};
/**