linux-kernel - Re: [PATCH 2/4] dmaengine: dw_dmac: move to generic DMA binding

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Date:	Sat, 16 Feb 2013 10:07:39 +0000
From:	Arnd Bergmann <arnd@...db.de>
To:	Viresh Kumar <viresh.kumar@...aro.org>
Cc:	Vinod Koul <vinod.koul@...el.com>, Dan Williams <djbw@...com>,
	linux-arm-kernel@...ts.infradead.org,
	devicetree-discuss@...ts.ozlabs.org,
	Olof Johansson <olof@...om.net>, linux-kernel@...r.kernel.org,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Vinod Koul <vinod.koul@...ux.intel.com>
Subject: Re: [PATCH 2/4] dmaengine: dw_dmac: move to generic DMA binding

On Saturday 16 February 2013, Viresh Kumar wrote:
> On 15 February 2013 23:51, Arnd Bergmann <arnd@...db.de> wrote:
> > diff --git a/Documentation/devicetree/bindings/dma/snps-dma.txt b/Documentation/devicetree/bindings/dma/snps-dma.txt
> > +- #dma-cells: must be <3>
> 
> > +DMA clients connected to the Designware DMA controller must use the format
> > +described in the dma.txt file, using a five-cell specifier for each channel.
> 
> s/five/four ?

Right. I thought I had fixed up all instances.

> > +static bool dw_dma_generic_filter(struct dma_chan *chan, void *param)
> >  {
> 
> > +       dws->cfg_hi     = 0xffffffff;
> > +       dws->cfg_lo     = 0xffffffff;
> 
> s/0xffffffff/-1 ?

It's an 'unsigned int'. While -1 would work here, I always find it a little
odd to rely on that feature of the C language.

Thannks for the review.

	Arnd
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