| Date | Mon, 8 Apr 2024 15:16:29 +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 Fri, Apr 05, 2024 at 05:02:18PM +0200, Théo Lebrun wrote:
> If the CQSPI_BUSYWAIT_EARLY quirk flag is on, call > readl_relaxed_poll_timeout() with no sleep at the start of > cqspi_wait_for_bit(). If its short timeout expires, a sleeping > readl_relaxed_poll_timeout() call takes the relay. > > Behavior is hidden behind a quirk flag to keep the previous behavior the > same on all platforms. > > 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? [unhandled content-type:application/pgp-signature] |