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authorLars-Peter Clausen <lars@metafoo.de>2011-11-16 20:34:03 +0100
committerMark Brown <broonie@opensource.wolfsonmicro.com>2011-11-17 16:51:23 +0000
commit064d4db11e23949c40b8a2f2f6be11c131b53932 (patch)
treea61edaa49618b7189a01fa9bb1a9c19e5cfda625 /drivers/base
parent7e5ec63ef574775900c82bd98f95bf039f513de3 (diff)
downloadop-kernel-dev-064d4db11e23949c40b8a2f2f6be11c131b53932.zip
op-kernel-dev-064d4db11e23949c40b8a2f2f6be11c131b53932.tar.gz
regmap: Properly round cache_word_size
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>
Diffstat (limited to 'drivers/base')
-rw-r--r--drivers/base/regmap/regcache.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index d687df6..6d93e49 100644
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -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];
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