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>
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@ -396,7 +396,7 @@ static int regcache_rbtree_sync(struct regmap *map, unsigned int min,
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map->cache_word_size);
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/* Is this the hardware default? If so skip. */
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ret = regcache_lookup_reg(map, i);
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ret = regcache_lookup_reg(map, regtmp);
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if (ret >= 0 && val == map->reg_defaults[ret].def)
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continue;
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