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regmap: Supply ranges to the sync operations

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In order to allow us to support partial sync operations add minimum and
maximum register arguments to the sync operation and update the rbtree
and lzo caches to use this new information. The LZO implementation is
obviously not good, we could exit the iteration earlier, but there may
be room for more wide reaching optimisation there.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown
2012-02-23 19:31:04 +00:00
parent 6ff7373809
commit ac8d91c801
4 changed files with 32 additions and 7 deletions
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10
drivers/base/regmap/regcache-lzo.c
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@@ -331,7 +331,8 @@ out:
return ret;
}
static int regcache_lzo_sync(struct regmap *map)
static int regcache_lzo_sync(struct regmap *map, unsigned int min,
unsigned int max)
{
struct regcache_lzo_ctx **lzo_blocks;
unsigned int val;
@@ -339,7 +340,12 @@ static int regcache_lzo_sync(struct regmap *map)
int ret;
lzo_blocks = map->cache;
for_each_set_bit(i, lzo_blocks[0]->sync_bmp, lzo_blocks[0]->sync_bmp_nbits) {
i = min;
for_each_set_bit_from(i, lzo_blocks[0]->sync_bmp,
lzo_blocks[0]->sync_bmp_nbits) {
if (i > max)
continue;
ret = regcache_read(map, i, &val);
if (ret)
return ret;