Re: [Patch] driver: cpufreq: use refclk delta based loop instead of udelay

[Jon Hunter]

On 01/09/2023 16:20, Sumit Gupta wrote:
> Use reference clock count based loop instead of "udelay()" for
> sampling of counters to improve the accuracy of re-generated CPU
> frequency. "udelay()" internally calls "WFE" which stops the
> counters and results in bigger delta between the last set freq
> and the re-generated value from counters. The counter sampling
> window used in loop is the minimum number of reference clock
> cycles which is known to give a stable value of CPU frequency.
> The change also helps to reduce the sampling window from "500us"
> to "<50us".
>
> Suggested-by: Antti Miettinen <amiettinen@xxxxxxxxxx>
> Signed-off-by: Sumit Gupta <sumitg@xxxxxxxxxx>


Please can you correct the subject and drop the 'driver:'.

Jon

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