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regmap: Allow rbtree to cache zero default values 

Ensure that when we start up in cache only mode we can store defaults of
zero, otherwise if the hardware is unavailable we won't be able to read.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2011-10-09 14:30:02 +01:00
parent 04e016adca
commit e42c5a9a42
1 changed files with 0 additions and 3 deletions
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3
drivers/base/regmap/regcache-rbtree.c
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@ -252,9 +252,6 @@ static int regcache_rbtree_write(struct regmap *map, unsigned int reg,
regcache_rbtree_set_register(rbnode, reg_tmp, value,
map->cache_word_size);
} else {
/* bail out early, no need to create the rbnode yet */
if (!value)
return 0;
/* look for an adjacent register to the one we are about to add */
for (node = rb_first(&rbtree_ctx->root); node;
node = rb_next(node)) {