Hello,

Thank you for working on that!

On 29/03/2021 00:02:28+0300, Kirill Kapranov wrote:

This patch series enables a Distributed Digital Calibration function for
the RTC of the family. This feature allows to improve the RTC accuracy by
means of compensation an XT oscillator drift. To learn more, see:
AB08XX Series Ultra Low Power RTC IC User's Guide
https://abracon.com/realtimeclock/AB08XX-Application-Manual.pdf

The patches 1 and 2 enable SQW output, that is necessary for subsequent
measurement and computation. However, this feature may be enabled and used
independently, as is.

Please use the common clock framework for this part. You will need a
dummy userspace user for this to work but I know Stephen is open to that
as we discussed that use case multiple times already.

The patches 3 and 4 enable the XT calibration feature per se. The SQW
output must be enabled for usage of this feature.

Please use the .set_offset and .get_offset rtc_ops for this part.


-- 
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com