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Date:      Sat, 2 May 2020 13:30:26 +0200
From:      Henri Hennebert <hlh@restart.be>
To:        freebsd-arm@freebsd.org
Subject:   Re: FreeBSD 13.0-CURRENT #0 r358465 on rockpro64 and RTC
Message-ID:  <fcf269d8-3e77-dceb-b9bf-397c3cc0eb7b@restart.be>
In-Reply-To: <62980dcd-468a-8df5-608a-5a1fc981a3d5@restart.be>
References:  <2ff55aa2-b919-3f2b-715b-a97bb0debe21@restart.be> <71529742-60eb-4301-808a-d9dd3902d50e@localhost> <95809d4d-9375-70b7-df83-1ba614ad6a8a@restart.be> <1bb31f7d-2fef-3c98-5243-4818be9c8de0@restart.be> <62980dcd-468a-8df5-608a-5a1fc981a3d5@restart.be>

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On 4/4/20 10:36 AM, Henri Hennebert via freebsd-arm wrote:
> On 3/8/20 9:18 AM, Henri Hennebert via freebsd-arm wrote:
>> On 3/7/20 12:06 PM, Henri Hennebert via freebsd-arm wrote:
>>> On 3/6/20 3:20 PM, Greg V wrote:
>>>>
>>>>
>>>> Mar 6, 2020 3:21:03 PM Henri Hennebert via freebsd-arm :
>>>>
>>>>> Hello
>>>>>
>>>>> I am running FreeBSD 13.0-CURRENT #0 r358465 on a rockpro64 4GB with a
>>>>> RTC BACKUP BATTERY HOLDER - CR-2032.
>>>>>
>>>>> (u-boot from https://wiki.freebsd.org/arm64/ROCKPro64 to run with the
>>>>> 4GB and with hw.ncpu=4 in loader.conf)
>>>>>
>>>>> I tested the 3V of the battery.
>>>>>
>>>>> It seems that the RTC is not managed for now (time lost after power
>>>>> off), is it correct?
>>>>
>>>> Hi, the RTC driver is not merged yet:
>>>>
>>>> https://reviews.freebsd.org/D22692
>>>>
>>> I try it and it work for me!
>>>
>> Strangely after a night off time is lost :-o
> 
> I change the battery (Duracell 2032). All was well but after 3 days the 
> voltage drops from 3.2 to 2.98 V and the RTC lost the time and date.
>
I was leaving the rockpro64 connected to my laptop with a
FTDI TTL232R-3V3 as the uart console.
Now removing this from the laptop after power off allow the RTC to stay 
operational for 2 weeks.

> So it's a hardware problem.
>>
>> Henri
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