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regmap: rbtree: Fix register default look-up in sync 

The code currently passes the register offset in the current block to
regcache_lookup_reg. This works fine as long as there is only one block and with
base register of 0, but in all other cases it will look-up the default for a
wrong register, which can cause unnecessary register writes. This patch fixes
it by passing the actual register number to regcache_lookup_reg.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: <stable@vger.kernel.org>
This commit is contained in:
Lars-Peter Clausen 2012-03-23 11:04:57 +01:00 committed by Mark Brown
parent dd775ae254
commit 4b4e9e43fd
1 changed files with 1 additions and 1 deletions
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2
drivers/base/regmap/regcache-rbtree.c
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@ -396,7 +396,7 @@ static int regcache_rbtree_sync(struct regmap *map, unsigned int min,
map->cache_word_size);
/* Is this the hardware default? If so skip. */
ret = regcache_lookup_reg(map, i);
ret = regcache_lookup_reg(map, regtmp);
if (ret >= 0 && val == map->reg_defaults[ret].def)
continue;