Hi!
The XT digital calibration feature allows to improve the RTC accuracy,
using a Distributed Digital Calibration function.
See ch. 5.9.1 of AB08XX Series Ultra Low Power RTC IC User's Guide
https://abracon.com/realtimeclock/AB08XX-Application-Manual.pdf
Signed-off-by: Kirill Kapranov <kirill.kapranov@xxxxxxxxxxxxxx>
---
drivers/rtc/rtc-abx80x.c | 145 +++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 145 insertions(+)
+static const int xt_freq_nom = 32768000; //Nominal XT frequency 32 kHz in mHz
C-style comment?
is it 32 kHz or 32.768 kHz?
+{
+ int retval;
+ long Adj;
Adj -> adj.
+
+static DEVICE_ATTR_WO(xt_frequency);
You are adding new user interface, you sould add documentation.
Best regards,
Pavel