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authorMark Brown <broonie@linaro.org>2013-10-10 21:06:32 +0100
committerMark Brown <broonie@linaro.org>2013-10-10 21:15:23 +0100
commitaffbe886e712437c25b575eac5fde5886bb42aec (patch)
tree093be88c70e2111328ba45fe580fc558374ea1a6 /drivers/base
parent1a25f26138cde2b83fd74ead6da0bbd4b6c42b60 (diff)
regmap: Use async I/O during cache sync
Try to speed up I/O a little by not synchronising until we are finished scheduling writes. A brief survey of existing users suggests we have none that would currently benefit from an async cache sync. Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'drivers/base')
-rw-r--r--drivers/base/regmap/regcache.c16
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index a36112af494c..d4dd77134814 100644
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -307,6 +307,8 @@ int regcache_sync(struct regmap *map)
if (!map->cache_dirty)
goto out;
+ map->async = true;
+
/* Apply any patch first */
map->cache_bypass = 1;
for (i = 0; i < map->patch_regs; i++) {
@@ -332,11 +334,15 @@ int regcache_sync(struct regmap *map)
map->cache_dirty = false;
out:
- trace_regcache_sync(map->dev, name, "stop");
/* Restore the bypass state */
+ map->async = false;
map->cache_bypass = bypass;
map->unlock(map->lock_arg);
+ regmap_async_complete(map);
+
+ trace_regcache_sync(map->dev, name, "stop");
+
return ret;
}
EXPORT_SYMBOL_GPL(regcache_sync);
@@ -375,17 +381,23 @@ int regcache_sync_region(struct regmap *map, unsigned int min,
if (!map->cache_dirty)
goto out;
+ map->async = true;
+
if (map->cache_ops->sync)
ret = map->cache_ops->sync(map, min, max);
else
ret = regcache_default_sync(map, min, max);
out:
- trace_regcache_sync(map->dev, name, "stop region");
/* Restore the bypass state */
map->cache_bypass = bypass;
+ map->async = false;
map->unlock(map->lock_arg);
+ regmap_async_complete(map);
+
+ trace_regcache_sync(map->dev, name, "stop region");
+
return ret;
}
EXPORT_SYMBOL_GPL(regcache_sync_region);