linux-kernel - Re: [PATCH v2 3/3] spi: spi-davinci: convert to DMA engine API

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Message-ID: <1345694380.1895.87.camel@vkoul-udesk3>
Date:	Thu, 23 Aug 2012 09:29:40 +0530
From:	Vinod Koul <vinod.koul@...ux.intel.com>
To:	Matt Porter <mporter@...com>
Cc:	cjb@...top.org, grant.likely@...retlab.ca,
	Linux DaVinci Kernel List 
	<davinci-linux-open-source@...ux.davincidsp.com>,
	Sekhar Nori <nsekhar@...com>,
	Linux MMC List <linux-mmc@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux SPI Devel List 
	<spi-devel-general@...ts.sourceforge.net>,
	Linux ARM Kernel List <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v2 3/3] spi: spi-davinci: convert to DMA engine API

On Wed, 2012-08-22 at 12:04 -0400, Matt Porter wrote:
> for querying of these types of limitations. Right now, the
> mmc driver implicitly knows that EDMA needs this restriction
> but it's something that should be queried before calling
> prep_slave().
that's something we need to add; exporting channel capabilities. We only
tell that it slave or memcpy today, but we need to tell clients what are
channel supported parameter ranges.

-- 
~Vinod

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