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From: "Shinji Watanabe" <watashin@mvision.co.jp>
To: <linuxppc-embedded@ozlabs.org>
Subject: How to access MPC8555 DMA register ?
Date: Tue, 6 Feb 2007 17:44:28 +0900
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Hi, all.

I used MPC8555CDS.

How to access DMA registers of MPC8555 ?

I can't read/write these registers on LINUX.

I called request_mem_region( 0xE0000000, LENGTH, ... ) in my device driver.

When I set LENGTH 0x21100, this function call succeded.

But When I set LENGTH 0x21200, this function call failed.

"e0021100-e002117f : fsl-dma0" is part of /proc/iomem log.

I guess my driver can't access fsl-dma0 area.

But fsl-dma0 area encompassed DMA registers I want to access.

I must find remove simbols like fsl-dma0.
Or I must find how to use modules encompass fsl-dma0.

Counld you give me some help/hint/tips ?

regards,

Shinji