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regmap: Implement regcache_cache_bypass helper function

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Ensure we've got a function so users can enable/disable the
cache bypass option.

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 2011-09-29 14:36:27 +01:00 committed by Mark Brown
parent beb1a10f21
commit 6eb0f5e015
2 changed files with 20 additions and 0 deletions
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19
drivers/base/regmap/regcache.c
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@ -286,6 +286,25 @@ void regcache_cache_only(struct regmap *map, bool enable)
} }
EXPORT_SYMBOL_GPL(regcache_cache_only); EXPORT_SYMBOL_GPL(regcache_cache_only);
/**
* regcache_cache_bypass: Put a register map into cache bypass mode
*
* @map: map to configure
* @cache_only: flag if changes should not be written to the hardware
*
* When a register map is marked with the cache bypass option, writes
* to the register map API will only update the hardware and not the
* the cache directly. This is useful when syncing the cache back to
* the hardware.
*/
void regcache_cache_bypass(struct regmap *map, bool enable)
{
mutex_lock(&map->lock);
map->cache_bypass = enable;
mutex_unlock(&map->lock);
}
EXPORT_SYMBOL_GPL(regcache_cache_bypass);
bool regcache_set_val(void *base, unsigned int idx, bool regcache_set_val(void *base, unsigned int idx,
unsigned int val, unsigned int word_size) unsigned int val, unsigned int word_size)
{ {

1
include/linux/regmap.h
View File

@ -142,5 +142,6 @@ int regmap_update_bits(struct regmap *map, unsigned int reg,
int regcache_sync(struct regmap *map); int regcache_sync(struct regmap *map);
void regcache_cache_only(struct regmap *map, bool enable); void regcache_cache_only(struct regmap *map, bool enable);
void regcache_cache_bypass(struct regmap *map, bool enable);
#endif #endif