linux-kernel - Re: [PATCH/RFC] dmaengine: add a slave parameter to __dma_request

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Message-ID: <Pine.LNX.4.64.1203071342010.19595@axis700.grange>
Date:	Wed, 7 Mar 2012 13:45:48 +0100 (CET)
From:	Guennadi Liakhovetski <g.liakhovetski@....de>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
cc:	Vinod Koul <vinod.koul@...el.com>, linux-kernel@...r.kernel.org,
	'Jassi Brar' <jassisinghbrar@...il.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Magnus Damm <magnus.damm@...il.com>,
	Paul Mundt <lethal@...ux-sh.org>
Subject: Re: [PATCH/RFC] dmaengine: add a slave parameter to __dma_request_channel()

On Wed, 7 Mar 2012, Guennadi Liakhovetski wrote:

> 2. (goal: eliminate filter function look-ups) proposed by Linus W
> 
> (a) client issues
> 	dma_request_slave_channel(dev, "MMC-RX")
> (b) the dmaengine core scans a platform-provided list of channel mappings 
>     and picks up _the_ correct channel (****)

I think, this could work well with Russell's idea to implement virtual DMA 
channels centrally in dmaengine core.

Thanks
Guennadi
---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/
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