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From: "JH" <jupiter.hce@gmail.com>
To: yocto <yocto@lists.yoctoproject.org>
Subject: RTC issue
Date: Wed, 4 Aug 2021 18:38:38 +1000	[thread overview]
Message-ID: <CAA=hcWQGUvCofTbwCLA+M2ONFamdZvjWufb7Hy+Zkv5GX0uJfQ@mail.gmail.com> (raw)

Hi,

I built Yocto iMX6ULL image on Zeus kernel 4.19, but I have following
RTC errors:

[ 3494.446265] rtc rtc0: Timeout trying to get valid LPSRT Counter read
[ 4190.088406] rtc rtc0: Timeout trying to get valid LPSRT Counter read
[ 4885.740595] rtc rtc0: Timeout trying to get valid LPSRT Counter read

I measured iMX6ULL RTC_XTALI and RTC_XTALO signals connecting to a
32.768 kHz 90 kΩ ESR crystal, all good, not sure if it is caused by
kernel or Yocto build.

Someone suggested that I should remove the external RTC, the rationale
is that Linux is not really a real time OS, there is no battery for
supporting RTC. Appreciate your comments.

My apology if it is an off topic.

Thank you.

Kind regards,

- jupiter

             reply	other threads:[~2021-08-04  8:39 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-04  8:38 JH [this message]
2021-08-04  9:51 ` [yocto] RTC issue Matthias Klein
2021-08-12  6:30   ` JH
2021-08-12  6:37     ` Matthias Klein

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