From: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: Harini Katakam
<harinikatakamlinux-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: Grant Likely
<grant.likely-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Pawel Moll <pawel.moll-5wv7dgnIgG8@public.gmane.org>,
Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>,
"ijc+devicetree-KcIKpvwj1kUDXYZnReoRVg@public.gmane.org"
<ijc+devicetree-KcIKpvwj1kUDXYZnReoRVg@public.gmane.org>,
Kumar Gala <galak-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>,
linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
"linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"linux-doc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-doc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [PATCH v2 2/2] devicetree: Add devicetree bindings documentation for Cadence SPI
Date: Fri, 4 Apr 2014 13:46:37 +0100 [thread overview]
Message-ID: <20140404124637.GT14763@sirena.org.uk> (raw)
In-Reply-To: <CAFcVECLDyfFSZFk9fzFKsr6pM=f1nwzGAhjX17z=NsbvWpiDew-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
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On Fri, Apr 04, 2014 at 05:44:23PM +0530, Harini Katakam wrote:
> On Fri, Apr 4, 2014 at 3:39 PM, Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> wrote:
> > On Fri, Apr 04, 2014 at 08:30:38AM +0530, Harini Katakam wrote:
> >> This IP can drive 4 slaves.
> >> The CS line to be driven is selected in spi device structure and
> >> that is driven by the software.
> > So why specify this in the binding at all? If the device always has the
> > same number of chip selects it's redundant.
> I'm sorry, I should have explained that better.
> The IP can support upto 4 chip selects.
> The num-cs value here is the number of chip selects actually used on the board.
Why does that need to be configured? Surely the presence of slaves is
enough information.
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next prev parent reply other threads:[~2014-04-04 12:46 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-03 11:10 [PATCH v2 1/2] SPI: Add driver for Cadence SPI controller Harini Katakam
2014-04-03 21:43 ` Mark Brown
2014-04-04 3:49 ` Harini Katakam
[not found] ` <1396523431-14519-1-git-send-email-harinik-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org>
2014-04-03 11:10 ` [PATCH v2 2/2] devicetree: Add devicetree bindings documentation for Cadence SPI Harini Katakam
2014-04-03 21:34 ` Mark Brown
[not found] ` <20140403213446.GB14763-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2014-04-04 3:00 ` Harini Katakam
2014-04-04 8:09 ` Geert Uytterhoeven
2014-04-04 11:16 ` Michal Simek
2014-04-04 10:09 ` Mark Brown
[not found] ` <20140404100919.GO14763-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2014-04-04 12:14 ` Harini Katakam
[not found] ` <CAFcVECLDyfFSZFk9fzFKsr6pM=f1nwzGAhjX17z=NsbvWpiDew-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-04-04 12:24 ` Peter Crosthwaite
2014-04-04 12:39 ` Harini Katakam
2014-04-04 12:46 ` Mark Brown [this message]
2014-04-04 14:08 ` Harini Katakam
2014-04-04 14:30 ` Harini Katakam
[not found] ` <CAFcVECJYdW0=r425tWs8y6DJDNh3c75TAzg7+UCNRgLP8WHf+A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-04-04 23:14 ` Peter Crosthwaite
2014-04-05 6:05 ` Harini Katakam
2014-04-05 23:43 ` Peter Crosthwaite
[not found] ` <CAEgOgz5XsOYXyPTpUzx_j=+Z19oksTT5TB8G3r9KbYakrQvgHw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-04-07 7:46 ` Harini Katakam
2014-04-04 14:42 ` Mark Brown
2014-04-04 14:49 ` Harini Katakam
2014-04-04 9:04 ` [PATCH v2 1/2] SPI: Add driver for Cadence SPI controller sourav
2014-04-04 9:24 ` sourav
2014-04-04 10:02 ` Michal Simek
2014-04-04 22:58 ` Peter Crosthwaite
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