From: "Maarten Brock" <m.brock@vanmierlo.com>
To: "Andy Shevchenko" <andriy.shevchenko@linux.intel.com>,
"Bryan O'Donoghue" <pure.logic@nexus-software.ie>,
"Peter Hurley" <peter@hurleysoftware.com>,
linux-serial@vger.kernel.org, "Vinod Koul" <vinod.koul@intel.com>,
linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
ismo.puustinen@intel.com,
"Heikki Krogerus" <heikki.krogerus@linux.intel.com>
Subject: Re: [PATCH v3 03/11] dmaengine: dw: set polarity of handshake interface
Date: Fri, 06 May 2016 13:20:19 +0200 [thread overview]
Message-ID: <20160506132019.019e5db0@kerio.vanmierlo.com> (raw)
----- 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
next reply other threads:[~2016-05-06 11:20 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-06 11:20 Maarten Brock [this message]
2016-05-06 11:38 ` Andy Shevchenko
-- strict thread matches above, loose matches on Subject: below --
2016-05-06 15:48 Maarten Brock
2016-05-06 18:08 ` Andy Shevchenko
2016-04-27 13:48 [PATCH v3 00/11] serial: 8250: split LPSS to 8250_lpss, enable DMA on Quark Andy Shevchenko
2016-04-27 13:48 ` [PATCH v3 03/11] dmaengine: dw: set polarity of handshake interface Andy Shevchenko
2016-05-05 17:54 ` Bryan O'Donoghue
2016-05-06 10:42 ` Andy Shevchenko
2016-05-06 11:10 ` Bryan O'Donoghue
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