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| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2011-09-19 18:22:14 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2011-09-19 19:06:37 +0100 |
| commit | 92afb286d744511f51a05f8acb6c111d05737617 (patch) | |
| tree | 4453e7f7ba9b9bbc2ff8fbce64b2fe3a3b81f809 | |
| parent | 39a58439d6006c48941511276c0041f56352c529 (diff) | |
| download | linux-92afb286d744511f51a05f8acb6c111d05737617.tar.bz2 | |
regmap: Allow drivers to control cache_only flag
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| -rw-r--r-- | drivers/base/regmap/regcache.c | 18 | ||||
| -rw-r--r-- | include/linux/regmap.h | 2 |
2 files changed, 20 insertions, 0 deletions
diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c index 179f222d76c3..e2b172b93dba 100644 --- a/drivers/base/regmap/regcache.c +++ b/drivers/base/regmap/regcache.c @@ -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) { diff --git a/include/linux/regmap.h b/include/linux/regmap.h index 63b30752adfd..76ac255a17a5 100644 --- a/include/linux/regmap.h +++ b/include/linux/regmap.h @@ -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 |