diff options
Diffstat (limited to 'drivers/base/regmap/regcache.c')
| -rw-r--r-- | drivers/base/regmap/regcache.c | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c index 666f6f5011dc..bd9d01b681d1 100644 --- a/drivers/base/regmap/regcache.c +++ b/drivers/base/regmap/regcache.c @@ -79,7 +79,7 @@ static int regcache_hw_init(struct regmap *map) return 0; } -int regcache_init(struct regmap *map) +int regcache_init(struct regmap *map, const struct regmap_config *config) { int ret; int i; @@ -100,6 +100,13 @@ int regcache_init(struct regmap *map) return -EINVAL; } + map->reg_defaults = config->reg_defaults; + map->num_reg_defaults = config->num_reg_defaults; + map->num_reg_defaults_raw = config->num_reg_defaults_raw; + map->reg_defaults_raw = config->reg_defaults_raw; + map->cache_size_raw = (config->val_bits / 8) * config->num_reg_defaults_raw; + map->cache_word_size = config->val_bits / 8; + map->cache = NULL; map->cache_ops = cache_types[i]; @@ -241,6 +248,8 @@ int regcache_sync(struct regmap *map) map->cache_ops->name); name = map->cache_ops->name; trace_regcache_sync(map->dev, name, "start"); + if (!map->cache_dirty) + goto out; if (map->cache_ops->sync) { ret = map->cache_ops->sync(map); } else { @@ -291,6 +300,23 @@ void regcache_cache_only(struct regmap *map, bool enable) EXPORT_SYMBOL_GPL(regcache_cache_only); /** + * regcache_mark_dirty: Mark the register cache as dirty + * + * @map: map to mark + * + * Mark the register cache as dirty, for example due to the device + * having been powered down for suspend. If the cache is not marked + * as dirty then the cache sync will be suppressed. + */ +void regcache_mark_dirty(struct regmap *map) +{ + mutex_lock(&map->lock); + map->cache_dirty = true; + mutex_unlock(&map->lock); +} +EXPORT_SYMBOL_GPL(regcache_mark_dirty); + +/** * regcache_cache_bypass: Put a register map into cache bypass mode * * @map: map to configure |