regmap: Re-introduce bulk read support check in regmap_bulk_read()

Support for drivers to define bulk read/write callbacks in regmap_config
was introduced by the commit d77e74561368 ("regmap: Add bulk read/write
callbacks into regmap_config"), but this commit wrongly dropped a check
in regmap_bulk_read() to determine whether bulk reads can be done or not.

Before that commit, it was checked if map->bus was set. Now has to check
if a map->read callback has been set.

Fixes: d77e74561368 ("regmap: Add bulk read/write callbacks into regmap_config")
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://lore.kernel.org/r/20220616073435.1988219-2-javierm@redhat.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 2221d98..e5bb703 100644 (file)
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -3017,7 +3017,7 @@ int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val,
        if (val_count == 0)
                return -EINVAL;
 
-       if (map->format.parse_inplace && (vol || map->cache_type == REGCACHE_NONE)) {
+       if (map->read && map->format.parse_inplace && (vol || map->cache_type == REGCACHE_NONE)) {
                ret = regmap_raw_read(map, reg, val, val_bytes * val_count);
                if (ret != 0)
                        return ret;