linux-kernel - Re: [PATCH v2 04/23] ARM: LPC32xx: Add DMA configuration to platform data

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Message-ID: <4FFD744F.8060204@antcom.de>
Date:	Wed, 11 Jul 2012 14:40:47 +0200
From:	Roland Stigge <stigge@...com.de>
To:	Arnd Bergmann <arnd@...db.de>
CC:	Russell King - ARM Linux <linux@....linux.org.uk>, arm@...nel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	kevin.wells@....com, srinivas.bakki@....com, aletes.xgr@...il.com
Subject: Re: [PATCH v2 04/23] ARM: LPC32xx: Add DMA configuration to platform
 data

On 07/11/2012 02:33 PM, Arnd Bergmann wrote:
> On Wednesday 11 July 2012, Roland Stigge wrote:
>> Thanks for the note! Looks like the interface consolidated to replace
>> ch->cd->min_signal with sth. like cd->min_signal directly.
>>
>> Accessing the signal id/number is/was quite convenient because as you
>> can see in the 3 above cases that now get compile errors with the pl08x
>> changes, the LPC32xx chip hard-wires those numbers, and the respective
>> code is LPC32xx specific anyway.
>>
>> So can we make an exception here to compare static dma channel numbers?
>> Or is there any other interface to access the static dma channel numbers
>> that I'm currently not aware of?
>>
>> Depending on what we agree upon, I can then provide fixes to the
>> lpc32xx-next branch.
> 
> I'm not familiar with this code, but I think the solution for now
> (while we don't have a DT binding) is to do the same thing that
> spear3xx does: pass a pointer to the global pl08x_filter_id
> function and an identifier for the channel in the platform data
> for that device.

OK, thanks!

Is a patch on top of the already provided lpc32xx-next branches the
preferred form for a fix? On top of which branch do you need it?

Thanks in advance,

Roland
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