linux-kernel - Re: [PATCH 30/32] ARM: ux500: Supply MMC DMA configuration via Device Tree

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Message-ID: <20130425131129.GK4623@gmail.com>
Date:	Thu, 25 Apr 2013 14:11:29 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Linus Walleij <linus.walleij@...aro.org>
Cc:	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Arnd Bergmann <arnd@...db.de>,
	Linus WALLEIJ <linus.walleij@...ricsson.com>
Subject: Re: [PATCH 30/32] ARM: ux500: Supply MMC DMA configuration via
 Device Tree

On Thu, 25 Apr 2013, Linus Walleij wrote:

> On Thu, Apr 25, 2013 at 1:49 PM, Lee Jones <lee.jones@...aro.org> wrote:
> > On Thu, 25 Apr 2013, Linus Walleij wrote:
> >
> >> On Thu, Apr 18, 2013 at 12:12 PM, Lee Jones <lee.jones@...aro.org> wrote:
> >>
> >> > When requesting a channel, a DMA client needs to pass some pieces of
> >> > information such as; request channel, device type, channel type and
> >> > direction etc. Normally we do this in the form of platform data, but
> >> > when DT is enabled we need to pass it using the driver's bindings
> >> > instead.
> >> >
> >> > Signed-off-by: Lee Jones <lee.jones@...aro.org>
> >>
> >> This requires that the pending MMCI patch get merged *first* right?
> >
> > No, it doesn't. There is no harm in applying this *before*.
> >
> > It will just lay dormant until it is.
> 
> Ah yeah, right. But the patch stripping out the platform data (no 31) will
> wreak havoc if applied before the MMCI patch right?

Yes, that will cause problems. It will most likely go into PIO mode.

-- 
Lee Jones
Linaro ST-Ericsson Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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