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From 6c2fec9c2f1888fc177c29a37a3032f8144d2003 Mon Sep 17 00:00:00 2001
From: Vasily Khoruzhick <anarsoul@gmail.com>
Date: Fri, 13 Aug 2010 20:01:53 +0300
Subject: [PATCH 06/20] s3cmci: minor fixups
- It's not necessary to start DMA op manually, as we have
autostart feature enabled
- Restore prescaler before DMA operation, otherwise it
takes ages to complete DMA op.
Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
---
drivers/mmc/host/s3cmci.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/mmc/host/s3cmci.c b/drivers/mmc/host/s3cmci.c
index 2e16e0a..5d1a8ed 100644
--- a/drivers/mmc/host/s3cmci.c
+++ b/drivers/mmc/host/s3cmci.c
@@ -1106,6 +1106,8 @@ static int s3cmci_prepare_dma(struct s3cmci_host *host, struct mmc_data *data)
sg_dma_address(&data->sg[i]),
sg_dma_len(&data->sg[i]));
+ /* Restore prescaler value */
+ writel(host->prescaler, host->base + S3C2410_SDIPRE);
res = s3c2410_dma_enqueue(host->dma, host,
sg_dma_address(&data->sg[i]),
sg_dma_len(&data->sg[i]));
@@ -1116,8 +1118,6 @@ static int s3cmci_prepare_dma(struct s3cmci_host *host, struct mmc_data *data)
}
}
- s3c2410_dma_ctrl(host->dma, S3C2410_DMAOP_START);
-
return 0;
}
--
1.7.2.2
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