On Wed, 15 Apr 2015 17:09:36 +0200, Jakub Kicinski wrote:
> 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
Ugh.. I missed 2025172e3280 ("spi/bitbang: Use core message pump"),
working with old kernels bit my in the rear end.
Sorry for the noise.
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