diff --git a/drivers/dma-buf/rk_heaps/rk-cma-heap.c b/drivers/dma-buf/rk_heaps/rk-cma-heap.c
index 5b063f87bffe..488282feebf3 100644
--- a/drivers/dma-buf/rk_heaps/rk-cma-heap.c
+++ b/drivers/dma-buf/rk_heaps/rk-cma-heap.c
@@ -9,7 +9,7 @@
  * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
  *	Andrew F. Davis <afd@ti.com>
  *
- * Copyright (C) 2022 Rockchip Electronics Co. Ltd.
+ * Copyright (C) 2022 Rockchip Electronics Co., Ltd.
  * Author: Simon Xue <xxm@rock-chips.com>
  */
 
diff --git a/drivers/dma-buf/rk_heaps/rk-dma-cma.c b/drivers/dma-buf/rk_heaps/rk-dma-cma.c
index b6521f7dcc06..c969cfbde1e9 100644
--- a/drivers/dma-buf/rk_heaps/rk-dma-cma.c
+++ b/drivers/dma-buf/rk_heaps/rk-dma-cma.c
@@ -2,7 +2,7 @@
 /*
  * Early setup for Rockchip DMA CMA
  *
- * Copyright (C) 2022 Rockchip Electronics Co. Ltd.
+ * Copyright (C) 2022 Rockchip Electronics Co., Ltd.
  * Author: Simon Xue <xxm@rock-chips.com>
  */
 
diff --git a/drivers/dma-buf/rk_heaps/rk-dma-heap.c b/drivers/dma-buf/rk_heaps/rk-dma-heap.c
index bb217dfe91df..def5252336b3 100644
--- a/drivers/dma-buf/rk_heaps/rk-dma-heap.c
+++ b/drivers/dma-buf/rk_heaps/rk-dma-heap.c
@@ -4,7 +4,7 @@
  *
  * Copyright (C) 2011 Google, Inc.
  * Copyright (C) 2019 Linaro Ltd.
- * Copyright (C) 2022 Rockchip Electronics Co. Ltd.
+ * Copyright (C) 2022 Rockchip Electronics Co., Ltd.
  * Author: Simon Xue <xxm@rock-chips.com>
  */
 
diff --git a/drivers/dma-buf/rk_heaps/rk-dma-heap.h b/drivers/dma-buf/rk_heaps/rk-dma-heap.h
index 3bc750b02023..11cce03e862d 100644
--- a/drivers/dma-buf/rk_heaps/rk-dma-heap.h
+++ b/drivers/dma-buf/rk_heaps/rk-dma-heap.h
@@ -4,7 +4,7 @@
  *
  * Copyright (C) 2011 Google, Inc.
  * Copyright (C) 2019 Linaro Ltd.
- * Copyright (C) 2022 Rockchip Electronics Co. Ltd.
+ * Copyright (C) 2022 Rockchip Electronics Co., Ltd.
  * Author: Simon Xue <xxm@rock-chips.com>
  */