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regmap: Factor out single value register syncing

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In order to support sparse caches that don't store data in raw format
factor out the parts of the raw block sync implementation that deal with
writing a single register via _regmap_write().

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20230325-regcache-maple-v3-1-23e271f93dc7@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Mark Brown
2023-03-30 01:10:23 +01:00
parent 2238959b6a
commit 05933e2d44
2 changed files with 27 additions and 14 deletions
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40
drivers/base/regmap/regcache.c
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@@ -677,6 +677,30 @@ static bool regcache_reg_present(unsigned long *cache_present, unsigned int idx)
return test_bit(idx, cache_present);
}
int regcache_sync_val(struct regmap *map, unsigned int reg, unsigned int val)
{
int ret;
if (!regcache_reg_needs_sync(map, reg, val))
return 0;
map->cache_bypass = true;
ret = _regmap_write(map, reg, val);
map->cache_bypass = false;
if (ret != 0) {
dev_err(map->dev, "Unable to sync register %#x. %d\n",
reg, ret);
return ret;
}
dev_dbg(map->dev, "Synced register %#x, value %#x\n",
reg, val);
return 0;
}
static int regcache_sync_block_single(struct regmap *map, void *block,
unsigned long *cache_present,
unsigned int block_base,
@@ -693,21 +717,9 @@ static int regcache_sync_block_single(struct regmap *map, void *block,
continue;
val = regcache_get_val(map, block, i);
if (!regcache_reg_needs_sync(map, regtmp, val))
continue;
map->cache_bypass = true;
ret = _regmap_write(map, regtmp, val);
map->cache_bypass = false;
if (ret != 0) {
dev_err(map->dev, "Unable to sync register %#x. %d\n",
regtmp, ret);
ret = regcache_sync_val(map, regtmp, val);
if (ret != 0)
return ret;
}
dev_dbg(map->dev, "Synced register %#x, value %#x\n",
regtmp, val);
}
return 0;