1 files changed, 3 insertions, 0 deletions

diff --git a/include/linux/platform_data/dma-s3c24xx.h b/include/linux/platform_data/dma-s3c24xx.h
index 5a0cfffe3bbb..89ba1b0c90e4 100644
--- a/include/linux/platform_data/dma-s3c24xx.h
+++ b/include/linux/platform_data/dma-s3c24xx.h
@@ -9,6 +9,9 @@
  * any later version.
  */
 
+/* Helper to encode the source selection constraints for early s3c socs. */
+#define S3C24XX_DMA_CHANREQ(src, chan)  ((BIT(3) | src) << chan * 4)
+
 enum s3c24xx_dma_bus {
         S3C24XX_DMA_APB,
         S3C24XX_DMA_AHB,