linux-kernel - Re: [PATCH 0/4] dmaengine: Add driver for Xilinx MPMC

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Message-ID: <fa686aa41003261418w4e28ed03m9ae3d87696e88af0@mail.gmail.com>
Date:	Fri, 26 Mar 2010 15:18:24 -0600
From:	Grant Likely <grant.likely@...retlab.ca>
To:	"Steven J. Magnani" <steve@...idescorp.com>
Cc:	Dan Williams <dan.j.williams@...el.com>,
	linux-kernel@...r.kernel.org, microblaze-uclinux@...e.uq.edu.au,
	monstr@...str.eu
Subject: Re: [PATCH 0/4] dmaengine: Add driver for Xilinx MPMC

On Wed, Mar 17, 2010 at 10:25 AM, Steven J. Magnani
<steve@...idescorp.com> wrote:
> This is a DMA engine driver for SDMA channels on a Xilinx Multi-Port
> Memory Controller (MPMC).
>
> Caveats:
> * The OF bus driver (part 4) is based on the fsldma driver and how I
>  thought the device and channels might be represented in a device tree blob.
>  As I don't use OF in my kernel, all I am able to do is verify that the code
>  compiles. Suggestions for improvement are especially welcome here.

If you're not using the OF bits, then don't worry about them yet.
They can be added later.  of_platform is getting merged with platform
bus anyway, so one driver will work with both.

> * Similarly, I took a stab at DCR support based on the ll_temac driver
>  and some discussions about supporting both DCR and simple pointer access
>  to device registers. I'm working on Microblaze so cannot test the DCR code.

Again, don't bother with stuff you don't have.  It can be added after the fact.

g.
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