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regmap: Allow drivers to reinitialise the register cache at runtime

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Sometimes the register map information may change in ways that drivers can
discover at runtime. For example, new revisions of a device may add new
registers. Support runtime discovery by drivers by allowing the register
cache to be reinitialised with a new function regmap_reinit_cache() which
discards the existing cache and creates a new one.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown
2011-12-03 17:06:20 +00:00
parent 50b776fc71
commit bf31517335
2 changed files with 35 additions and 0 deletions
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include/linux/regmap.h
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@@ -129,6 +129,8 @@ struct regmap *regmap_init_spi(struct spi_device *dev,
const struct regmap_config *config);
void regmap_exit(struct regmap *map);
int regmap_reinit_cache(struct regmap *map,
const struct regmap_config *config);
int regmap_write(struct regmap *map, unsigned int reg, unsigned int val);
int regmap_raw_write(struct regmap *map, unsigned int reg,
const void *val, size_t val_len);