linux-kernel - Re: [PATCH v5 2/4] dmaengine: add driver for Samsung s3c24xx SoCs

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Message-ID: <20131007143351.GK2954@intel.com>
Date:	Mon, 7 Oct 2013 20:03:51 +0530
From:	Vinod Koul <vinod.koul@...el.com>
To:	Heiko Stübner <heiko@...ech.de>
Cc:	kgene.kim@...sung.com, Dan Williams <djbw@...com>,
	linus.walleij@...aro.org, Tomasz Figa <tomasz.figa@...il.com>,
	Sylwester Nawrocki <sylvester.nawrocki@...il.com>,
	linux-kernel@...r.kernel.org, linux-samsung-soc@...r.kernel.org
Subject: Re: [PATCH v5 2/4] dmaengine: add driver for Samsung s3c24xx SoCs

On Wed, Sep 18, 2013 at 09:19:54PM +0200, Heiko Stübner wrote:
> This adds a new driver to support the s3c24xx dma using the dmaengine
> and makes the old one in mach-s3c24xx obsolete in the long run.
> 
> Conceptually the s3c24xx-dma feels like a distant relative of the pl08x
> with numerous virtual channels being mapped to a lot less physical ones.
> The driver therefore borrows a lot from the amba-pl08x driver in this
> regard. Functionality-wise the driver gains a memcpy ability in addition
> to the slave_sg one.
> 
> The driver supports both the method for requesting the peripheral used
> by SoCs before the S3C2443 and the different method for S3C2443 and later.
> 
> On earlier SoCs the hardware channels usable for specific peripherals is
> constrainted while on later SoCs all channels can be used for any peripheral.
> 
> Tested on a s3c2416-based board, memcpy using the dmatest module and
> slave_sg partially using the spi-s3c64xx driver.
> 
> Signed-off-by: Heiko Stuebner <heiko@...ech.de>
> Acked-by: Linus Walleij <linus.walleij@...aro.org>
Acked-by: Vinod Koul <vinod.koul@...el.com>

--
~Vinod
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