diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index bde30c5..6b4a775 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -158,6 +158,26 @@
 	return b[0];
 }
 
+static void regmap_lock_mutex(struct regmap *map)
+{
+	mutex_lock(&map->mutex);
+}
+
+static void regmap_unlock_mutex(struct regmap *map)
+{
+	mutex_unlock(&map->mutex);
+}
+
+static void regmap_lock_spinlock(struct regmap *map)
+{
+	spin_lock(&map->spinlock);
+}
+
+static void regmap_unlock_spinlock(struct regmap *map)
+{
+	spin_unlock(&map->spinlock);
+}
+
 /**
  * regmap_init(): Initialise register map
  *
@@ -187,7 +207,15 @@
 		goto err;
 	}
 
-	mutex_init(&map->lock);
+	if (bus->fast_io) {
+		spin_lock_init(&map->spinlock);
+		map->lock = regmap_lock_spinlock;
+		map->unlock = regmap_unlock_spinlock;
+	} else {
+		mutex_init(&map->mutex);
+		map->lock = regmap_lock_mutex;
+		map->unlock = regmap_unlock_mutex;
+	}
 	map->format.buf_size = (config->reg_bits + config->val_bits) / 8;
 	map->format.reg_bytes = DIV_ROUND_UP(config->reg_bits, 8);
 	map->format.pad_bytes = config->pad_bits / 8;
@@ -365,7 +393,7 @@
 {
 	int ret;
 
-	mutex_lock(&map->lock);
+	map->lock(map);
 
 	regcache_exit(map);
 	regmap_debugfs_exit(map);
@@ -384,7 +412,7 @@
 
 	ret = regcache_init(map, config);
 
-	mutex_unlock(&map->lock);
+	map->unlock(map);
 
 	return ret;
 }
@@ -536,11 +564,11 @@
 {
 	int ret;
 
-	mutex_lock(&map->lock);
+	map->lock(map);
 
 	ret = _regmap_write(map, reg, val);
 
-	mutex_unlock(&map->lock);
+	map->unlock(map);
 
 	return ret;
 }
@@ -567,11 +595,11 @@
 {
 	int ret;
 
-	mutex_lock(&map->lock);
+	map->lock(map);
 
 	ret = _regmap_raw_write(map, reg, val, val_len);
 
-	mutex_unlock(&map->lock);
+	map->unlock(map);
 
 	return ret;
 }
@@ -601,7 +629,7 @@
 	if (!map->format.parse_val)
 		return -EINVAL;
 
-	mutex_lock(&map->lock);
+	map->lock(map);
 
 	/* No formatting is require if val_byte is 1 */
 	if (val_bytes == 1) {
@@ -622,7 +650,7 @@
 		kfree(wval);
 
 out:
-	mutex_unlock(&map->lock);
+	map->unlock(map);
 	return ret;
 }
 EXPORT_SYMBOL_GPL(regmap_bulk_write);
@@ -696,11 +724,11 @@
 {
 	int ret;
 
-	mutex_lock(&map->lock);
+	map->lock(map);
 
 	ret = _regmap_read(map, reg, val);
 
-	mutex_unlock(&map->lock);
+	map->unlock(map);
 
 	return ret;
 }
@@ -725,7 +753,7 @@
 	unsigned int v;
 	int ret, i;
 
-	mutex_lock(&map->lock);
+	map->lock(map);
 
 	if (regmap_volatile_range(map, reg, val_count) || map->cache_bypass ||
 	    map->cache_type == REGCACHE_NONE) {
@@ -746,7 +774,7 @@
 	}
 
  out:
-	mutex_unlock(&map->lock);
+	map->unlock(map);
 
 	return ret;
 }
@@ -799,7 +827,7 @@
 	int ret;
 	unsigned int tmp, orig;
 
-	mutex_lock(&map->lock);
+	map->lock(map);
 
 	ret = _regmap_read(map, reg, &orig);
 	if (ret != 0)
@@ -816,7 +844,7 @@
 	}
 
 out:
-	mutex_unlock(&map->lock);
+	map->unlock(map);
 
 	return ret;
 }
@@ -883,7 +911,7 @@
 	if (map->patch)
 		return -EBUSY;
 
-	mutex_lock(&map->lock);
+	map->lock(map);
 
 	bypass = map->cache_bypass;
 
@@ -911,7 +939,7 @@
 out:
 	map->cache_bypass = bypass;
 
-	mutex_unlock(&map->lock);
+	map->unlock(map);
 
 	return ret;
 }