Messages in this thread | | | Date | Mon, 8 Apr 2024 17:40:32 +0100 | From | Mark Brown <> | Subject | Re: [PATCH v2 08/11] spi: cadence-qspi: add early busywait to cqspi_wait_for_bit() |
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On Mon, Apr 08, 2024 at 04:42:43PM +0200, Théo Lebrun wrote: > On Mon Apr 8, 2024 at 4:16 PM CEST, Mark Brown wrote: > > On Fri, Apr 05, 2024 at 05:02:18PM +0200, Théo Lebrun wrote:
> > > The reason is to avoid hrtimer interrupts on the system. All read > > > operations take less than 100µs.
> > Why would this be platform specific, this seems like a very standard > > optimisation technique?
> It does not make sense if you know that all read operations take more > than 100µs. I preferred being conservative. If you confirm it makes > sense I'll remove the quirk.
It does seem plausible at least, and the time could be made a tuneable with quirks or otherwise if that's needed. I think I'd expect the MIPS platform you're working with to be towards the lower end of performance for systems that are new enough to have this hardware. [unhandled content-type:application/pgp-signature] | |