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regmap: Properly round cache_word_size

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regcache currently only properly works with val bit sizes of 8 or 16, since
it will, when calculating the cache word size, round down. This causes the
cache storage to be too small to hold the full register value. Fix this by
rounding up instead.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Lars-Peter Clausen 2011-11-16 20:34:03 +01:00 committed by Mark Brown
parent 7e5ec63ef5
commit 064d4db11e
1 changed files with 2 additions and 2 deletions
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4
drivers/base/regmap/regcache.c
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@ -111,8 +111,8 @@ int regcache_init(struct regmap *map, const struct regmap_config *config)
map->num_reg_defaults = config->num_reg_defaults;
map->num_reg_defaults_raw = config->num_reg_defaults_raw;
map->reg_defaults_raw = config->reg_defaults_raw;
map->cache_size_raw = (config->val_bits / 8) * config->num_reg_defaults_raw;
map->cache_word_size = config->val_bits / 8;
map->cache_word_size = DIV_ROUND_UP(config->val_bits, 8);
map->cache_size_raw = map->cache_word_size * config->num_reg_defaults_raw;
map->cache = NULL;
map->cache_ops = cache_types[i];