spi-imx: real time operation

[Jakub Kicinski <moorray3@xxxxx>]

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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