From: Harini Katakam <harinikatakamlinux@gmail.com>
To: Mark Brown <broonie@kernel.org>
Cc: Grant Likely <grant.likely@linaro.org>,
Rob Herring <robh+dt@kernel.org>, Pawel Moll <pawel.moll@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
"ijc+devicetree@hellion.org.uk" <ijc+devicetree@hellion.org.uk>,
Kumar Gala <galak@codeaurora.org>,
linux-spi@vger.kernel.org,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>
Subject: Re: [PATCH v2 2/2] devicetree: Add devicetree bindings documentation for Cadence SPI
Date: Fri, 4 Apr 2014 20:19:37 +0530 [thread overview]
Message-ID: <CAFcVECKEMa9agyk8BQAbdadmggscwUk=9x-3nAM1TZiAoGf0MA@mail.gmail.com> (raw)
In-Reply-To: <20140404144244.GV14763@sirena.org.uk>
Hi Mark,
On Fri, Apr 4, 2014 at 8:12 PM, Mark Brown <broonie@kernel.org> wrote:
> On Fri, Apr 04, 2014 at 07:38:14PM +0530, Harini Katakam wrote:
>
>> OK. I understand.
>> Can you comment on the case where a decoder is used?
>
>> There is support for adding a decoder where extended slaves can be selected
>> through the IP's control register.
>> (This is not currently implemented in the driver but will be in the future.)
>
>> How should the driver know whether it is 4 or 16 select lines for example?
>> This has to be written to master->num_chipselect.
>
> That's the sort of case where it's useful yes - depending on how the
> implementation is done it may be sensible to just have a property
> specifying if a decoder is there (if it just changes the encoding in the
> register for example).
OK, great. That approach will work.
Regards,
Harini
next prev parent reply other threads:[~2014-04-04 14:49 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
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 [this message]
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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