RE: [PATCHv4] dmaengine: fsl-edma: fixup reg offset and hw S/G support in big-endian model
From: Jingchang Lu
Date: Tue Dec 09 2014 - 04:51:07 EST
Hi, Vinod,
Many thanks!
I resend the patch just before I saw this email, please ignore the
resend one since they are the same.
Thanks and Best Regards,
Jingchang
>-----Original Message-----
>From: Vinod Koul [mailto:vinod.koul@xxxxxxxxx]
>Sent: Tuesday, December 09, 2014 5:13 PM
>To: Lu Jingchang-B35083
>Cc: dmaengine@xxxxxxxxxxxxxxx; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx;
>linux-kernel@xxxxxxxxxxxxxxx
>Subject: Re: [PATCHv4] dmaengine: fsl-edma: fixup reg offset and hw S/G
>support in big-endian model
>
>On Wed, Oct 22, 2014 at 04:53:55PM +0800, Jingchang Lu wrote:
>> The offset of all 8-/16-bit registers in big-endian eDMA model are
>> swapped in a 32-bit size opposite those in the little-endian model.
>>
>> The hardware Scatter/Gather requires the subsequent TCDs stored in
>> memory in little endian independent of the register endian model, the
>> eDMA engine will do the swap if need.
>>
>> This patch also use regular assignment for tcd variables r/w instead
>> of with io function previously that may not always be true.
>Applied, thanks
>
>--
>~Vinod
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