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regmap: Allow drivers to control cache_only flag

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Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2011-09-19 18:22:14 +01:00
parent 39a58439d6
commit 92afb286d7
2 changed files with 20 additions and 0 deletions
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18
drivers/base/regmap/regcache.c
View File

@ -240,6 +240,24 @@ int regcache_sync(struct regmap *map)
}
EXPORT_SYMBOL_GPL(regcache_sync);
/**
* regcache_cache_only: Put a register map into cache only mode
*
* @map: map to configure
* @cache_only: flag if changes should be written to the hardware
*
* When a register map is marked as cache only writes to the register
* map API will only update the register cache, they will not cause
* any hardware changes. This is useful for allowing portions of
* drivers to act as though the device were functioning as normal when
* it is disabled for power saving reasons.
*/
void regcache_cache_only(struct regmap *map, bool enable)
{
map->cache_only = enable;
}
EXPORT_SYMBOL_GPL(regcache_cache_only);
bool regcache_set_val(void *base, unsigned int idx,
unsigned int val, unsigned int word_size)
{

2
include/linux/regmap.h
View File

@ -141,4 +141,6 @@ int regmap_update_bits(struct regmap *map, unsigned int reg,
unsigned int mask, unsigned int val);
int regcache_sync(struct regmap *map);
void regcache_cache_only(struct regmap *map, bool enable);
#endif