From: w.sang@pengutronix.de (Wolfram Sang)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3] dmaengine: mxs-dma: add dma support for i.MX23/28
Date: Mon, 21 Feb 2011 18:19:46 +0100 [thread overview]
Message-ID: <20110221171946.GL2616@pengutronix.de> (raw)
In-Reply-To: <1298283699-14635-1-git-send-email-shawn.guo@freescale.com>
On Mon, Feb 21, 2011 at 06:21:39PM +0800, Shawn Guo wrote:
> This patch adds dma support for Freescale MXS-based SoC i.MX23/28,
> including apbh-dma and apbx-dma.
>
> * apbh-dma and apbx-dma are supported in the driver as two mxs-dma
> instances.
>
> * apbh-dma is different between mx23 and mx28, hardware version
> register is used to differentiate.
>
> * mxs-dma supports pio function besides data transfer. The driver
> uses dma_data_direction DMA_NONE to identify the pio mode, and
> steals sgl and sg_len to get pio words and numbers from clients.
>
> * mxs dmaengine has some very specific features, like sense function
> and the special NAND support (nand_lock, nand_wait4ready). These
> are too specific to implemented in generic dmaengine driver.
>
> * The driver refers to imx-sdma and only a single descriptor is
> statically assigned to each channel.
>
> Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
Tested-by: Wolfram Sang <w.sang@pengutronix.de>
--
Pengutronix e.K. | Wolfram Sang |
Industrial Linux Solutions | http://www.pengutronix.de/ |
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next prev parent reply other threads:[~2011-02-21 17:19 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-21 10:21 [PATCH v3] dmaengine: mxs-dma: add dma support for i.MX23/28 Shawn Guo
2011-02-21 17:19 ` Wolfram Sang [this message]
2011-02-23 4:01 ` Koul, Vinod
2011-02-23 5:57 ` Shawn Guo
2011-02-23 5:55 ` Koul, Vinod
2011-02-23 10:05 ` Russell King - ARM Linux
2011-02-23 10:21 ` Russell King - ARM Linux
2011-02-23 11:06 ` Koul, Vinod
2011-02-23 12:12 ` Russell King - ARM Linux
2011-02-23 7:58 ` Lothar Waßmann
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