1 files changed, 26 insertions, 8 deletions

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 85bffddda530..bf441db1ee90 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -482,8 +482,14 @@ int regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
 		    size_t val_len)
 {
 	int ret;
+	int i;
+	bool vol = true;
 
-	WARN_ON(map->cache_type != REGCACHE_NONE);
+	for (i = 0; i < val_len / map->format.val_bytes; i++)
+		if (!regmap_volatile(map, reg + i))
+			vol = false;
+
+	WARN_ON(!vol && map->cache_type != REGCACHE_NONE);
 
 	mutex_lock(&map->lock);
 
@@ -511,18 +517,30 @@ int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val,
 {
 	int ret, i;
 	size_t val_bytes = map->format.val_bytes;
-
-	WARN_ON(map->cache_type != REGCACHE_NONE);
+	bool vol = true;
 
 	if (!map->format.parse_val)
 		return -EINVAL;
 
-	ret = regmap_raw_read(map, reg, val, val_bytes * val_count);
-	if (ret != 0)
-		return ret;
+	/* Is this a block of volatile registers? */
+	for (i = 0; i < val_count; i++)
+		if (!regmap_volatile(map, reg + i))
+			vol = false;
 
-	for (i = 0; i < val_count * val_bytes; i += val_bytes)
-		map->format.parse_val(val + i);
+	if (vol || map->cache_type == REGCACHE_NONE) {
+		ret = regmap_raw_read(map, reg, val, val_bytes * val_count);
+		if (ret != 0)
+			return ret;
+
+		for (i = 0; i < val_count * val_bytes; i += val_bytes)
+			map->format.parse_val(val + i);
+	} else {
+		for (i = 0; i < val_count; i++) {
+			ret = regmap_read(map, reg + i, val + (i * val_bytes));
+			if (ret != 0)
+				return ret;
+		}
+	}
 
 	return 0;
 }