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regmap: Add a helper function for regcache sync test

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We're going to add another "does this register need syncing?" check, so
rather than repeating it in three places, we'll separate all of the
relevant logic into a helper function.

Signed-off-by: Kevin Cernekee <cernekee@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Kevin Cernekee 2015-05-05 15:14:13 -07:00 committed by Mark Brown
parent b787f68c36
commit 3969fa0806
1 changed files with 15 additions and 11 deletions
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26
drivers/base/regmap/regcache.c
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@ -249,6 +249,18 @@ int regcache_write(struct regmap *map,
return 0;
}
static bool regcache_reg_needs_sync(struct regmap *map, unsigned int reg,
unsigned int val)
{
int ret;
/* Is this the hardware default? If so skip. */
ret = regcache_lookup_reg(map, reg);
if (ret >= 0 && val == map->reg_defaults[ret].def)
return false;
return true;
}
static int regcache_default_sync(struct regmap *map, unsigned int min,
unsigned int max)
{
@ -266,9 +278,7 @@ static int regcache_default_sync(struct regmap *map, unsigned int min,
if (ret)
return ret;
/* Is this the hardware default? If so skip. */
ret = regcache_lookup_reg(map, reg);
if (ret >= 0 && val == map->reg_defaults[ret].def)
if (!regcache_reg_needs_sync(map, reg, val))
continue;
map->cache_bypass = 1;
@ -613,10 +623,7 @@ static int regcache_sync_block_single(struct regmap *map, void *block,
continue;
val = regcache_get_val(map, block, i);
/* Is this the hardware default? If so skip. */
ret = regcache_lookup_reg(map, regtmp);
if (ret >= 0 && val == map->reg_defaults[ret].def)
if (!regcache_reg_needs_sync(map, regtmp, val))
continue;
map->cache_bypass = 1;
@ -688,10 +695,7 @@ static int regcache_sync_block_raw(struct regmap *map, void *block,
}
val = regcache_get_val(map, block, i);
/* Is this the hardware default? If so skip. */
ret = regcache_lookup_reg(map, regtmp);
if (ret >= 0 && val == map->reg_defaults[ret].def) {
if (!regcache_reg_needs_sync(map, regtmp, val)) {
ret = regcache_sync_block_raw_flush(map, &data,
base, regtmp);
if (ret != 0)