From: Mark Brown <broonie@kernel.org>
To: Illia Smyrnov <x0194613@ti.com>
Cc: Illia Smyrnov <illia.smyrnov@ti.com>,
Grant Likely <grant.likely@linaro.org>,
Rob Herring <rob.herring@calxeda.com>,
Rob Landley <rob@landley.net>, Daniel Mack <zonque@gmail.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
Tony Lindgren <tony@atomide.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
devicetree-discuss@lists.ozlabs.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org,
spi-devel-general@lists.sourceforge.net
Subject: Re: [PATCH 1/2] spi: spi-omap2-mcspi.c: Add dts for slave device configuration.
Date: Thu, 6 Jun 2013 11:19:19 +0100 [thread overview]
Message-ID: <20130606101919.GQ31367@sirena.org.uk> (raw)
In-Reply-To: <51B05FAE.60508@ti.com>
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On Thu, Jun 06, 2013 at 01:08:46PM +0300, Illia Smyrnov wrote:
> On 06/05/2013 02:57 PM, Mark Brown wrote:
> Turbo mode gives the expected results not for all cases. There are
> some limitations:
> - works only if a single channel is enabled (no effect when several
> channels are enable);
> - improves the throughput on RX direction only;
> - effective only when a transfer exceeds two words. For single SPI
> word transfers OMAP TRM [1] recommends deactivate turbo mode.
> So it is useful to have the property in DT, that allow us to switch
> turbo mode off/on for certain slave.
Why? These sound like conditions that can readily be detected at
runtime.
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next prev parent reply other threads:[~2013-06-06 10:19 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-05 11:39 [PATCH 0/2] spi: omap2-mcspi: add FIFO buffer support Illia Smyrnov
2013-06-05 11:39 ` [PATCH 1/2] spi: spi-omap2-mcspi.c: Add dts for slave device configuration Illia Smyrnov
[not found] ` <1370432398-7796-2-git-send-email-illia.smyrnov-l0cyMroinI0@public.gmane.org>
2013-06-05 11:57 ` Mark Brown
[not found] ` <20130605115734.GY31367-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2013-06-06 10:08 ` Illia Smyrnov
2013-06-06 10:19 ` Mark Brown [this message]
[not found] ` <1370432398-7796-1-git-send-email-illia.smyrnov-l0cyMroinI0@public.gmane.org>
2013-06-05 11:39 ` [PATCH 2/2] spi: omap2-mcspi: Add FIFO buffer support Illia Smyrnov
2013-06-05 12:03 ` Mark Brown
[not found] ` <20130605120346.GZ31367-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2013-06-06 10:08 ` Illia Smyrnov
[not found] ` <51B05FB8.6050903-l0cyMroinI0@public.gmane.org>
2013-06-06 10:30 ` Mark Brown
[not found] ` <20130606103032.GR31367-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2013-06-11 17:09 ` Illia Smyrnov
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