linux-kernel - Re: [PATCH v2] mmc: mmci: Add qcom dml support to the driver.

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Date:	Wed, 23 Jul 2014 16:52:39 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Cc:	"linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
	Chris Ball <chris@...ntf.net>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	Russell King <linux@....linux.org.uk>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Andy Gross <agross@...eaurora.org>,
	"linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>
Subject: Re: [PATCH v2] mmc: mmci: Add qcom dml support to the driver.

On Fri, Jul 18, 2014 at 10:53 PM, Srinivas Kandagatla
<srinivas.kandagatla@...aro.org> wrote:

> On Qualcomm APQ8064 SOCs, SD card controller has an additional glue
> called DML (Data Mover Local/Lite) to assist dma transfers.
> This hardware needs to be setup before any dma transfer is requested.
> DML itself is not a DMA engine, its just a gule between the SD card
> controller and dma controller.
>
> Most of this code has been ported from qualcomm's 3.4 kernel.
>
> This patch adds the code necessary to intialize the hardware and setup
> before doing any dma transfers.
>
> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
> ---
> Changes since v1:
>    - Added licence text as spotted by Stephen B.
>    - Simplified dma channel lookup as suggested by Stephen B.
>    - Removed unnecessary parens spotted by Stephen B.
>    - in general some cleanup done.
>
> Changes since RFC:
>     - Moved qcom_dml.* to mmci_qcom_dml.* as suggested by Linus W.
>     - added BAM DMA dependency in Kconfig as suggested by Linus W

I really like this v2 version.
Reviewed-by: Linus Walleij <linus.walleij@...aro.org>

Yours,
Linus Walleij
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