linux-kernel - Re: [PATCH] dmaengine: add dmanegine slave map api's

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Message-ID: <1347853223.1943.136.camel@vkoul-udesk3>
Date:	Mon, 17 Sep 2012 09:10:23 +0530
From:	Vinod Koul <vinod.koul@...ux.intel.com>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
Cc:	linux-kernel@...r.kernel.org, Dan Williams <djbw@...com>,
	Arnd Bergmann <arnd@...db.de>, linus.walleij@...aro.org,
	Jon Hunter <jon-hunter@...com>,
	Stephen Warren <swarren@...dia.com>,
	Benoit Cousson <b-cousson@...com>,
	Shawn Guo <shawn.guo@...aro.org>,
	Guennadi Liakhovetski <g.liakhovetski@....de>,
	Sascha Hauer <kernel@...gutronix.de>,
	Kukjin Kim <kgene.kim@...sung.com>,
	viresh kumar <viresh.kumar@...aro.org>,
	Paul Mundt <lethal@...ux-sh.org>
Subject: Re: [PATCH] dmaengine: add dmanegine slave map api's

On Fri, 2012-09-14 at 12:18 +0100, Russell King - ARM Linux wrote:
> I'm not saying take the slave_id out of the map.  I'm saying, let the
> DMA engine driver itself figure out what dma_chan to return. 
But wont that assume the dma controller knows which channel to allocate.
And how would it know this information? This can be problematic for hard
wired muxes, but can be easily done for controller which have
programmable mux.

-- 
~Vinod

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