Messages in this thread | | | From | Alexander Stein <> | Subject | Re: [PATCH 1/2] spi: dt-bindings: introduce linux,use-rt-queue flag | Date | Fri, 09 Jun 2023 10:15:37 +0200 |
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Hi all,
Am Freitag, 9. Juni 2023, 09:41:14 CEST schrieb Linus Walleij: > On Wed, Jun 7, 2023 at 2:55 PM Matthias Schiffer > > <matthias.schiffer@ew.tq-group.com> wrote: > > It is not clear to me what alternative options we currently have if we > > want a setting to be effective from the very beginning, before > > userspace is running. Of course adding a cmdline option would work, but > > that seems worse than having it in the DT in every possible way. > > A agree with Mark that a command line option isn't that bad. It's something > that pertains to just the Linux kernel after all? And you can put that > command line option in the default device tree, in chosen, if you want.
I don't like the idea of a command line enabling realtime scheduling for all instances of the SPI controller driver or even all SPI controllers. Actually this might be worse if a non-rt SPI bus is considered for RT scheduling. IMHO this should be configurable per SPI controller, e.g. a sysfs attribute.
> No-one is going to > complain about that.
IIRC someone (maybe Greg K-H) opposed pretty hard against (module) parameters for (driver) configuration, but I can't find the post to back my statement.
Best regards, Alexander
> Yours, > Linus Walleij > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
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