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From: Jakub Kicinski <moorray3-5tc4TXWwyLM@public.gmane.org>
To: Markus.Niebel-HVi9AzVXQk5Wk0Htik3J/w@public.gmane.org
Cc: linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: spi-imx: real time operation
Date: Wed, 15 Apr 2015 17:09:36 +0200	[thread overview]
Message-ID: <20150415170936.3e506e6c@north> (raw)

Hi Markus!

I've seen your patch from July which added rt parameter to spi-imx [1].
If I understand the code correctly spi-imx is using bitbang, therefore
it uses old SPI API, therefore the message pump does not apply to it,
therefore setting master->rt has no effect.

Is my understanding correct?  If so before I convert spi-imx not to use
bitbang I would like to ask you if you have not already done it? ;)

Without SPI threads running with RT prio I can't even reliably use an
sc16is7xx UART at 115200...

[1] http://www.spinics.net/lists/arm-kernel/msg348713.html


Thanks
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             reply	other threads:[~2015-04-15 15:09 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-04-15 15:09 Jakub Kicinski [this message]
2015-04-15 19:36 ` spi-imx: real time operation Jakub Kiciński

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