FreeBSD 13.0-CURRENT #0 r358465 on rockpro64 and RTC

[Henri Hennebert]

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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