linux-kernel - Re: [PATCH V2 02/12] dmaengine: Add flow controller information to dma_slave

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Message-ID: <CACRpkda6-rzCOZkMuagAAxof0FVJMzExnP-QUHtztKM44v=eTw@mail.gmail.com>
Date:	Thu, 19 Jan 2012 17:59:54 +0100
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Viresh Kumar <viresh.kumar@...com>
Cc:	vinod.koul@...el.com, dan.j.williams@...el.com, cjb@...top.org,
	rmk+kernel@....linux.org.uk, ulf.hansson@...ricsson.com,
	linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
	egtvedt@...fundet.no, hskinnemoen@...il.com, kernel@...gutronix.de,
	perex@...ex.cz, linux-arm-kernel@...ts.infradead.org,
	armando.visconti@...com, shiraz.hashim@...com, vipin.kumar@...com,
	rajeev-dlh.kumar@...com, deepak.sikri@...com,
	vipulkumar.samar@...com, amit.virdi@...com, pratyush.anand@...com,
	bhupesh.sharma@...com, viresh.linux@...il.com, bhavna.yadav@...com,
	vincenzo.frascino@...com, mirko.gardi@...com
Subject: Re: [PATCH V2 02/12] dmaengine: Add flow controller information to dma_slave_config

On Wed, Jan 18, 2012 at 10:11 AM, Viresh Kumar <viresh.kumar@...com> wrote:

> Flow controller is programmable for few controllers and there are few
> intelligent peripherals like, Synopsys JPEG controller, that needs to be a flow
> controller of DMA transfers on dest side.
>
> For this, currently two drivers, pl08x and dw_dmac, support flow controller to
> be passed from platform to these drivers.
>
> Perhaps, this should be a part of struct dma_slave_config. This patch adds
> another field device_fc to this structure. User drivers must pass this as true
> if they want to be flow controller of certain transfers.
>
> Signed-off-by: Viresh Kumar <viresh.kumar@...com>

Acked-by: Linus Walleij <linus.walleij@...aro.org>

Thanks Viresh,
Linus Walleij
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