diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 742f300..d27758c 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -1116,6 +1116,16 @@
 
 	u8[0] |= map->write_flag_mask;
 
+	/*
+	 * Essentially all I/O mechanisms will be faster with a single
+	 * buffer to write.  Since register syncs often generate raw
+	 * writes of single registers optimise that case.
+	 */
+	if (val != work_val && val_len == map->format.val_bytes) {
+		memcpy(work_val, val, map->format.val_bytes);
+		val = work_val;
+	}
+
 	if (async && map->bus->async_write) {
 		struct regmap_async *async;