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regmap: Implement generic syncing functionality

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In the absence of a sync callback, do it manually.  This of course
can't take advantange of the specific optimizations of each
cache type but it will do well enough in most cases.

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 2011-09-27 11:25:06 +01:00 • committed by Mark Brown
parent dfdc4448e0
commit 954757d767
1 changed files with 26 additions and 7 deletions
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33
drivers/base/regmap/regcache.c
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@ -223,20 +223,39 @@ EXPORT_SYMBOL_GPL(regcache_write);
*/ */
int regcache_sync(struct regmap *map) int regcache_sync(struct regmap *map)
{ {
int ret; int ret = 0;
unsigned int val;
unsigned int i;
const char *name; const char *name;
BUG_ON(!map->cache_ops); BUG_ON(!map->cache_ops);
dev_dbg(map->dev, "Syncing %s cache\n",
map->cache_ops->name);
name = map->cache_ops->name;
trace_regcache_sync(map->dev, name, "start");
if (map->cache_ops->sync) { if (map->cache_ops->sync) {
dev_dbg(map->dev, "Syncing %s cache\n",
map->cache_ops->name);
name = map->cache_ops->name;
trace_regcache_sync(map->dev, name, "start");
ret = map->cache_ops->sync(map); ret = map->cache_ops->sync(map);
trace_regcache_sync(map->dev, name, "stop"); } else {
for (i = 0; i < map->num_reg_defaults; i++) {
ret = regcache_read(map, i, &val);
if (ret < 0)
goto out;
regcache_cache_bypass(map, true);
ret = regcache_write(map, i, val);
regcache_cache_bypass(map, false);
if (ret < 0)
goto out;
dev_dbg(map->dev, "Synced register %#x, value %#x\n",
map->reg_defaults[i].reg,
map->reg_defaults[i].def);
}
} }
return 0; out:
trace_regcache_sync(map->dev, name, "stop");
return ret;
} }
EXPORT_SYMBOL_GPL(regcache_sync); EXPORT_SYMBOL_GPL(regcache_sync);