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regmap: cache: Use raw I/O to sync rbtrees if we can 

This will bring no meaningful benefit by itself, it is done as a separate
commit to aid bisection if there are problems with the following commits
adding support for coalescing adjacent writes.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2013-03-26 21:26:19 +00:00
parent 221ad7f2df
commit 137b833457
1 changed files with 18 additions and 1 deletions
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19
drivers/base/regmap/regcache-rbtree.c
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@ -55,6 +55,12 @@ static unsigned int regcache_rbtree_get_register(struct regmap *map,
return regcache_get_val(map, rbnode->block, idx);
}
static const void *regcache_rbtree_get_reg_addr(struct regmap *map,
struct regcache_rbtree_node *rbnode, unsigned int idx)
{
return regcache_get_val_addr(map, rbnode->block, idx);
}
static void regcache_rbtree_set_register(struct regmap *map,
struct regcache_rbtree_node *rbnode,
unsigned int idx, unsigned int val)
@ -442,6 +448,7 @@ static int regcache_rbtree_sync(struct regmap *map, unsigned int min,
struct regcache_rbtree_node *rbnode;
unsigned int regtmp;
unsigned int val;
const void *addr;
int ret;
int i, base, end;
@ -480,7 +487,17 @@ static int regcache_rbtree_sync(struct regmap *map, unsigned int min,
continue;
map->cache_bypass = 1;
ret = _regmap_write(map, regtmp, val);
if (regmap_can_raw_write(map)) {
addr = regcache_rbtree_get_reg_addr(map,
rbnode, i);
ret = _regmap_raw_write(map, regtmp, addr,
map->format.val_bytes,
false);
} else {
ret = _regmap_write(map, regtmp, val);
}
map->cache_bypass = 0;
if (ret)
return ret;