diff options
| author |   Forrest Shi <b29237@freescale.com> | 2010-12-09 16:14:04 +0800 |
|---|---|---|
| committer |   Dan Williams <dan.j.williams@intel.com> | 2010-12-13 14:05:27 -0800 |
| commit | f3c677b997757326e1f29d33060719a6a5091950 (patch) | |
| tree | 3135e7ee4a04d5abd929cc863168c0c6a574e824 /drivers/dma/fsldma.h | |
| parent | dmaengine i.MX SDMA: initialize on module_init (diff) | |
| download | linux-dev-f3c677b997757326e1f29d33060719a6a5091950.tar.xz linux-dev-f3c677b997757326e1f29d33060719a6a5091950.zip | |
fsldma: fix issue of slow dma
Fixed fsl dma slow issue by initializing dma mode register with
bandwidth control. It boosts dma performance and should works
with 85xx board.
Signed-off-by: Forrest Shi <b29237@freescale.com>
Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to '')
| -rw-r--r-- | drivers/dma/fsldma.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/dma/fsldma.h b/drivers/dma/fsldma.h index cb4d6ff51597..ba9f403c0fbe 100644 --- a/drivers/dma/fsldma.h +++ b/drivers/dma/fsldma.h @@ -1,5 +1,5 @@ /* - * Copyright (C) 2007 Freescale Semiconductor, Inc. All rights reserved. + * Copyright (C) 2007-2010 Freescale Semiconductor, Inc. All rights reserved. * * Author: * Zhang Wei <wei.zhang@freescale.com>, Jul 2007 @@ -36,6 +36,13 @@ #define FSL_DMA_MR_DAHE 0x00002000 #define FSL_DMA_MR_SAHE 0x00001000 +/* + * Bandwidth/pause control determines how many bytes a given + * channel is allowed to transfer before the DMA engine pauses + * the current channel and switches to the next channel + */ +#define FSL_DMA_MR_BWC 0x08000000 + /* Special MR definition for MPC8349 */ #define FSL_DMA_MR_EOTIE 0x00000080 #define FSL_DMA_MR_PRC_RM 0x00000800 |