From: JH <jupiter.hce@gmail.com>
To: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: linux-rtc@vger.kernel.org
Subject: Re: rtc rtc0: Timeout trying to get valid LPSRT Counter read
Date: Sat, 1 Feb 2020 10:36:33 +1100 [thread overview]
Message-ID: <CAA=hcWS3+eACAL5NHUX=Dc1DgbUor=g6mCNGFPK0Qc9-4u9uZQ@mail.gmail.com> (raw)
In-Reply-To: <20200131141324.GD3515@piout.net>
Hi Alexandre,
On 2/1/20, Alexandre Belloni <alexandre.belloni@bootlin.com> wrote:
> On 31/01/2020 16:27:15+1100, JH wrote:
>> Hi Alexandre,
>>
>> On 1/31/20, Alexandre Belloni <alexandre.belloni@bootlin.com> wrote:
>> >> So it was already included in 4.19, I don't need to patch it, that is
>> >> good :-). Sorry I am still not clear how to stop that error message of
>> >> "rtc rtc0: Timeout trying to get valid LPSRT Counter read", the
>> >> message says "To avoid kernel hangs, put in timeouts", I am running
>> >> kernel 4.19.75 on iMX6, where should I put in timeouts?
>> >>
>> >
>> > The patch is adding the timeouts, without them, your kernel would be
>> > freezing. I'd say your issue is the 32k clock.
>>
>> Did you mean that is the issue of the hardware setup IMX6ULL for 32k
>> RTC_XTALI? That is nominal frequency 32.768 kHz for IMX6ULL EVK and
>> customized devices. Change to which frequency (64k?) can fix the
>> problem and remove the error message?
>>
>
> I can't help much more without seeing the schematics of your particular
> board. 32k is the correct frequency but are your sure it is going to the
> RTC? Are you sure you have power on VDD_SNVS_IN? Was there a security
> violation detected?
The XTALI and XTALO is connected to 24 MHz Y501 XTALI Oscillator, the
RTC_XTALI and RTC_XTALO is connected to Y502 32.768KHZ crystal. Don't
know about VDD_SNVS_IN, The hardware was designed by an experienced
hardware engineers, I am not sure if they could make any silly
mistakes.
Thank you Alexandre,
Kind regards,
- jh
prev parent reply other threads:[~2020-01-31 23:36 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-02 8:40 rtc rtc0: Timeout trying to get valid LPSRT Counter read JH
2020-01-12 11:03 ` Alexandre Belloni
2020-01-30 2:36 ` JH
2020-01-30 10:47 ` Alexandre Belloni
2020-01-30 11:27 ` JH
2020-01-30 14:40 ` Alexandre Belloni
2020-01-31 5:27 ` JH
2020-01-31 14:13 ` Alexandre Belloni
2020-01-31 23:36 ` JH [this message]
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