I am trying to let a RTC works under Ubuntu 22.04. I have a Kunbus RevPi Core 3+ (i.e. a Raspberry CM 3 with some nice Hardware attached to it) which has on board a PCF2129 from NXP Semiconductor.
I found the driver in the kernel tree rtc-pcf2127 and I have loaded the module:
sudo modprobe rtc-pcf2127
The modules was loaded:
ubuntu@ubuntu:~$ lsmod | grep rtc
rtc_pcf2127 24576 0
But no /dev/rtc has appeared:
ubuntu@ubuntu:~$ sudo ls -al /dev/rtc
ls: cannot access '/dev/rtc': No such file or directory
scanning the i2c bus has no answere too:
ubuntu@ubuntu:~$ sudo i2cdetect -y 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
How could properly use the rtc device?
Thanks
