linux-kernel - Re: [PATCH 34/39] dmaengine: ste_dma40: Convert data

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Date:	Thu, 16 May 2013 15:11:57 +0530
From:	Vinod Koul <vinod.koul@...el.com>
To:	Lee Jones <lee.jones@...aro.org>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	balbi@...com, linux-usb@...r.kernel.org,
	linux-crypto@...r.kernel.org, davem@...emloft.net,
	herbert@...dor.hengli.com.au, arnd@...db.de,
	linus.walleij@...ricsson.com, srinidhi.kasagar@...ricsson.com,
	Dan Williams <djbw@...com>,
	Per Forlin <per.forlin@...ricsson.com>,
	Rabin Vincent <rabin@....in>
Subject: Re: [PATCH 34/39] dmaengine: ste_dma40: Convert data_width from
 register bit format to value

On Thu, May 16, 2013 at 08:35:53AM +0100, Lee Jones wrote:
> On Thu, 16 May 2013, Vinod Koul wrote:
> 
> > On Wed, May 15, 2013 at 10:51:57AM +0100, Lee Jones wrote:
> > > +u8 d40_width_to_bits(enum dma_slave_buswidth width)
> > > +{
> > > +	if (width == DMA_SLAVE_BUSWIDTH_1_BYTE)
> > > +		return STEDMA40_ESIZE_8_BIT;
> > > +	else if (width == DMA_SLAVE_BUSWIDTH_2_BYTES)
> > > +		return STEDMA40_ESIZE_16_BIT;
> > > +	else if (width == DMA_SLAVE_BUSWIDTH_8_BYTES)
> > > +		return STEDMA40_ESIZE_64_BIT;
> > > +	else
> > > +		return STEDMA40_ESIZE_32_BIT;
> > > +}
> > > +
> > Switch looks better for this and how about
> > 	return fls(width);
> > 
> > as your defines are 0...3 and dmaengine define 1,2,..8 for same thing
> > then you can also get rid of STEDMA40_XXX_WIDTH macros!
> 
> I like it.
> 
> Will you let me do it as a follow-up patch?
Okay...

--
~Vinod
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