* Re: [PATCH v5 1/3] ARM: add CPPI 4.1 DMA support
[not found] <201005152214.53993.sshtylyov@ru.mvista.com>
@ 2010-09-28 9:13 ` Linus Walleij
2010-09-28 10:13 ` Sergei Shtylyov
0 siblings, 1 reply; 2+ messages in thread
From: Linus Walleij @ 2010-09-28 9:13 UTC (permalink / raw)
To: Sergei Shtylyov
Cc: linux-arm-kernel, davinci-linux-open-source, khilman, linux,
linux kernel, Dan Williams
2010/5/15 Sergei Shtylyov <sshtylyov@ru.mvista.com>:
> Add support for Texas Instuments Communication Port Programming Interface 4.1
> (CPPI 4.1) used on OMAP-L1x/DA8xx and AM35x.
Sorry for late feedback ...
> +++ linux-davinci/arch/arm/common/cppi41.c
Can you migrate this driver to drivers/dma/cppi41.c and use the
DMAengine interface like so many DMA drivers we have created
recently, or is there some very special characteristics about this
DMA controller meriting it to be placed in arch/arm/*?
Note: we have the support for PL08x found in ARM reference
designs queued for drivers/dma/amba-pl08x.c,
not arch/arm/common/*.
The rationale about this is to lower the churn in arch/arm/*
and put drivers into the proper subsystems, and in this case
there is an appropriate subsystem to be used.
Yours,
Linus Walleij
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH v5 1/3] ARM: add CPPI 4.1 DMA support
2010-09-28 9:13 ` [PATCH v5 1/3] ARM: add CPPI 4.1 DMA support Linus Walleij
@ 2010-09-28 10:13 ` Sergei Shtylyov
0 siblings, 0 replies; 2+ messages in thread
From: Sergei Shtylyov @ 2010-09-28 10:13 UTC (permalink / raw)
To: Linus Walleij
Cc: Sergei Shtylyov, linux-arm-kernel, davinci-linux-open-source,
khilman, linux, linux kernel, Dan Williams
Hello.
On 28-09-2010 13:13, Linus Walleij wrote:
>> Add support for Texas Instuments Communication Port Programming Interface 4.1
>> (CPPI 4.1) used on OMAP-L1x/DA8xx and AM35x.
> Sorry for late feedback ...
>> +++ linux-davinci/arch/arm/common/cppi41.c
> Can you migrate this driver to drivers/dma/cppi41.c and use the
> DMAengine interface like so many DMA drivers we have created
> recently, or is there some very special characteristics about this
> DMA controller meriting it to be placed in arch/arm/*?
I have once studied the possibility of doing this driver under
drivers/dma/, and found that hardly achievable. Maybe I should try again though...
> Yours,
> Linus Walleij
WBR, Sergei
^ permalink raw reply [flat|nested] 2+ messages in thread
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2010-09-28 9:13 ` [PATCH v5 1/3] ARM: add CPPI 4.1 DMA support Linus Walleij
2010-09-28 10:13 ` Sergei Shtylyov
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