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-rw-r--r--drivers/dma/fsldma.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
index f18d1bde0439..a1cb25e277b5 100644
--- a/drivers/dma/fsldma.c
+++ b/drivers/dma/fsldma.c
@@ -12,6 +12,11 @@
12 * also fit for MPC8560, MPC8555, MPC8548, MPC8641, and etc. 12 * also fit for MPC8560, MPC8555, MPC8548, MPC8641, and etc.
13 * The support for MPC8349 DMA contorller is also added. 13 * The support for MPC8349 DMA contorller is also added.
14 * 14 *
15 * This driver instructs the DMA controller to issue the PCI Read Multiple
16 * command for PCI read operations, instead of using the default PCI Read Line
17 * command. Please be aware that this setting may result in read pre-fetching
18 * on some platforms.
19 *
15 * This is free software; you can redistribute it and/or modify 20 * This is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by 21 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or 22 * the Free Software Foundation; either version 2 of the License, or
@@ -49,9 +54,10 @@ static void dma_init(struct fsl_dma_chan *fsl_chan)
49 case FSL_DMA_IP_83XX: 54 case FSL_DMA_IP_83XX:
50 /* Set the channel to below modes: 55 /* Set the channel to below modes:
51 * EOTIE - End-of-transfer interrupt enable 56 * EOTIE - End-of-transfer interrupt enable
57 * PRC_RM - PCI read multiple
52 */ 58 */
53 DMA_OUT(fsl_chan, &fsl_chan->reg_base->mr, FSL_DMA_MR_EOTIE, 59 DMA_OUT(fsl_chan, &fsl_chan->reg_base->mr, FSL_DMA_MR_EOTIE
54 32); 60 | FSL_DMA_MR_PRC_RM, 32);
55 break; 61 break;
56 } 62 }
57 63