Unable to read hardware Clock

NXP i.MX8M Plus
1

Hi,

I’m unable to read the hardware clock on my HummingBoard Pulse & i.MX8M Plus.
I’m using your hardknott yocto release.
Dmesg output:

dmesg | grep rtc-a
[    5.323718] rtc-abx80x 2-0069: model 1805, revision 2.3, lot 373, wafer 3, uid 53f0
[    5.335351] rtc-abx80x 2-0069: Enabling trickle charger: 05
[    5.379611] rtc-abx80x 2-0069: Oscillator failure, data is invalid.
[    5.379998] rtc-abx80x 2-0069: registered as rtc0
[    5.391270] rtc-abx80x 2-0069: Oscillator failure, data is invalid.
[    5.398571] rtc-abx80x 2-0069: hctosys: unable to read the hardware clock
[   68.654207] rtc-abx80x 2-0069: Oscillator failure, data is invalid.
[  139.181129] rtc-abx80x 2-0069: Oscillator failure, data is invalid.
root@:~# hwclock
[  180.550011] rtc-abx80x 2-0069: Oscillator failure, data is invalid.
hwclock: RTC_RD_TIME: Invalid argument

Do you have any hints?

Best regards, Jonas

2

These errors will occur until the RTC is programmed with a valid time. This is generally done by the kernel or systemd depending on the configuration. You can do this manually by running the command sudo hwclock -w