linux-kernel - Re: [PATCH v3 06/10] spi/pxa2xx: add support for DMA engine

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Date:	Mon, 4 Feb 2013 20:46:53 +0100
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:	linux-kernel@...r.kernel.org,
	Grant Likely <grant.likely@...retlab.ca>,
	Eric Miao <eric.y.miao@...il.com>,
	Russell King <linux@....linux.org.uk>,
	Haojian Zhuang <haojian.zhuang@...aro.org>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	chao.bi@...el.com,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	cxie4@...vell.com, ytang5@...vell.com
Subject: Re: [PATCH v3 06/10] spi/pxa2xx: add support for DMA engine

On Tue, Jan 22, 2013 at 11:26 AM, Mika Westerberg
<mika.westerberg@...ux.intel.com> wrote:

> To be able to use DMA with this driver on non-PXA platforms we implement
> support for the generic DMA engine API. This lets user to use different DMA
> engines with little or no modification to the driver.
>
> Request lines and channel numbers can be passed to the driver from the
> platform specific data.
>
> The DMA engine implementation will be selected by default even on PXA
> platform. User can select the legacy DMA API by enabling Kconfig option
> CONFIG_SPI_PXA2XX_PXADMA.
>
> Signed-off-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
> ---
> Linus W, there haven't been any comments from Vinod/Dan about the alignment
> thing so I added a comment 'REVISIT: ..' so that we remember to change this
> once it has been sorted out. I hope that is OK for you.

This is OK and the kernel sure looks better *after* this patch than *before*
it, so it is a big step in the right direction in either case.
Acked-by: Linus Walleij <linus.walleij@...aro.org>

Yours,
Linus Walleij
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