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. The patches 3 and 4 enable the XT calibration feature per se. The SQW output must be enabled for usage of this feature. TIA! Kirill Kirill Kapranov (4): dt-bindings: rtc: abracon,abx80x: Add sqw property rtc:abx80x: Enable SQW output dt-bindings: rtc: abracon,abx80x: Add xt-frequency property rtc:abx80x: Enable xt digital calibration .../devicetree/bindings/rtc/abracon,abx80x.txt | 25 ++ drivers/rtc/rtc-abx80x.c | 252 +++++++++++++++++++++ 2 files changed, 277 insertions(+) -- 2.11.0
