Re: [PATCH v3 03/11] dmaengine: dw: set polarity of handshake interface

From	"Maarten Brock" <m.brock@vanmierlo.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH v3 03/11] dmaengine: dw: set polarity of handshake interface
Date	2016-05-06 13:30 +0200
Message-ID	<rvM7f-3YW-7@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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----- Original Message -----
From: Andy Shevchenko [mailto:andriy.shevchenko@linux.intel.com]
To: Bryan O'Donoghue [mailto:pure.logic@nexus-software.ie], Peter Hurley [mailto:peter@hurleysoftware.com], linux-serial@vger.kernel.org, Vinod Koul [mailto:vinod.koul@intel.com], linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org, Greg Kroah-Hartman [mailto:gregkh@linuxfoundation.org], ismo.puustinen@intel.com, Heikki Krogerus [mailto:heikki.krogerus@linux.intel.com]
Sent: Fri, 06 May 2016 12:42:00 +0200
Subject: Re: [PATCH v3 03/11] dmaengine: dw: set polarity of handshake interface


> On Thu, 2016-05-05 at 18:54 +0100, Bryan O'Donoghue wrote:
> > On Wed, 2016-04-27 at 16:48 +0300, Andy Shevchenko wrote:
> > > 
> > > +       bool                    polarity;
> > So this variable is not very intuitively named.
> 
> There is a help above. This is a property of the Synopsys DesignWare DMA
> engine. Anyone familiar with datasheet easily understands this.
> 
> > 
> > You end up setting somepointer->polarity = true; in a later patch. 
> > 
> > Since you're respining a V4 I'd suggest a name that describes a little
> > bit better than polarity. Setting polarity = true is a little bit
> > liked being asked "you you like ice-cream or apple pie" and then
> > saying "yes please".
> 
> It's about handshake interface polarity, so, what about hs_polarity?

So it means: handshake has polarity (true) or handshake has no polarity
(omnidirectional?) (false), right?

Maarten

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Re: [PATCH v3 03/11] dmaengine: dw: set polarity of handshake  interface "Maarten Brock" <m.brock@vanmierlo.com> - 2016-05-06 13:30 +0200
  Re: [PATCH v3 03/11] dmaengine: dw: set polarity of handshake interface Andy Shevchenko <andy.shevchenko@gmail.com> - 2016-05-06 13:40 +0200

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