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

[Nícolas F. R. A. Prado]

On Thu, Jul 13, 2023 at 11:42:37AM -0400, 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.
> 
> Reviewed-by: Chen-Yu Tsai <wenst at chromium.org>
> Tested-by: Chen-Yu Tsai <wenst at chromium.org>
> Signed-off-by: Nícolas F. R. A. Prado <nfraprado at collabora.com>

Hi Daniel,

gentle ping on this patch.

Thanks,
Nícolas