[PATCH v2] thermal/drivers/mediatek/lvts_thermal: Make readings valid in filtered mode

[Alexandre Mergnat]

Reviewed-by: Alexandre Mergnat <amergnat at baylibre.com>

On 13/07/2023 17:42, Nícolas F. R. A. Prado wrote:
> Currently, when a controller is configured to use filtered mode, thermal
> readings are valid only about 30% of the time.
> 
> Upon testing, it was noticed that lowering any of the interval settings
> resulted in an improved rate of valid data. The same was observed when
> decreasing the number of samples for each sensor (which also results in
> quicker measurements).
> 
> Retrying the read with a timeout longer than the time it takes to
> resample (about 344us with these settings and 4 sensors) also improves
> the rate.
> 
> Lower all timing settings to the minimum, configure the filtering to
> single sample, and poll the measurement register for at least one period
> to improve the data validity on filtered mode.  With these changes in
> place, out of 100000 reads, a single one failed, ie 99.999% of the data
> was valid.

-- 
Regards,
Alexandre