2 files changed, 8 insertions, 2 deletions

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 8d516a9bfc01..025c62358bd6 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -769,7 +769,9 @@ struct regmap *__regmap_init(struct device *dev,
         INIT_LIST_HEAD(&map->async_free);
         init_waitqueue_head(&map->async_waitq);
 
-        if (config->read_flag_mask || config->write_flag_mask) {
+        if (config->read_flag_mask ||
+            config->write_flag_mask ||
+            config->zero_flag_mask) {
                 map->read_flag_mask = config->read_flag_mask;
                 map->write_flag_mask = config->write_flag_mask;
         } else if (bus) {
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 15eddc1353ba..f8bff272c429 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -296,7 +296,10 @@ typedef void (*regmap_unlock)(void *);
  *                  a read.
  * @write_flag_mask: Mask to be set in the top bytes of the register when doing
  *                   a write. If both read_flag_mask and write_flag_mask are
- *                   empty the regmap_bus default masks are used.
+ *                   empty and zero_flag_mask is not set the regmap_bus default
+ *                   masks are used.
+ * @zero_flag_mask: If set, read_flag_mask and write_flag_mask are used even
+ *                   if they are both empty.
  * @use_single_rw: If set, converts the bulk read and write operations into
  *                  a series of single read and write operations. This is useful
  *                  for device that does not support bulk read and write.
@@ -355,6 +358,7 @@ struct regmap_config {
 
         unsigned long read_flag_mask;
         unsigned long write_flag_mask;
+        bool zero_flag_mask;
 
         bool use_single_rw;
         bool can_multi_write;