dmaengine: shdma: Add more register documentation

[deliverable/linux.git] / drivers / dma / sh / shdmac.c

diff --git a/drivers/dma/sh/shdmac.c b/drivers/dma/sh/shdmac.c
index 146d5df926db00364429cbe75ce9ff84e9dddf46..1a6f6595c6c163f66c44e972211cd41696440001 100644 (file)
--- a/drivers/dma/sh/shdmac.c
+++ b/drivers/dma/sh/shdmac.c
@@ -38,12 +38,12 @@
 #include "../dmaengine.h"
 #include "shdma.h"
 
-/* DMA register */
-#define SAR    0x00
-#define DAR    0x04
-#define TCR    0x08
-#define CHCR   0x0C
-#define DMAOR  0x40
+/* DMA registers */
+#define SAR    0x00    /* Source Address Register */
+#define DAR    0x04    /* Destination Address Register */
+#define TCR    0x08    /* Transfer Count Register */
+#define CHCR   0x0C    /* Channel Control Register */
+#define DMAOR  0x40    /* DMA Operation Register */
 
 #define TEND   0x18 /* USB-DMAC */