Re: Raspberry Pi POE+ hat overlay

Hey,

Ok. I'm new to rpi4 and arm in general but tomorrow I will force
'arm_freq=1800' again just to see it it crashes again.
I will check too what values linux shows.

I don't know if firmware/uboot version included in 12.3 supports this
feature.

Cheers,

Doug Rabson <dfr@rabson.org> escreveu no dia quarta, 17/05/2023 à(s) 13:11:

> Hi Nuno,
>
> I'm not sure where to start - I just happened to notice in the
> documentation here:
> https://www.raspberrypi.com/documentation/computers/config_txt.html that
> the cpu frequency Pi4B R1.4 was listed as 1800 if arm_boot=1 so I tried it.
>
> Doug.
>
>
>
> On Wed, 17 May 2023 at 11:11, Nuno Teixeira <eduardo@freebsd.org> wrote:
>
>> Hello Doug,
>>
>> I have too a 1.5 rpi but arm_boost=1 isn't doing anything, htop shows
>> 1500Mhz when doing something intensive.
>> I'm running 13.2 stable
>>
>> Do I missing something?
>>
>> Could you take a look at my setup?
>>
>> Thanks,
>>
>> Doug Rabson <dfr@rabson.org> escreveu no dia terça, 16/05/2023 à(s)
>> 17:19:
>>
>>>
>>> On Sat, 13 May 2023 at 13:45, Doug Rabson <dfr@rabson.org> wrote:
>>>
>>>> I was able to build an updated rpi-firmware port based on 1.20210805
>>>> and this boots successfully on pi400 as well as rpi4. With this, I can load
>>>> the rpi-poe-plus overlay and I just need to try and reverse engineer the
>>>> undocumented mailbox API by reading the Linux code.
>>>>
>>>
>>> I have a first approximation of a fan driver which works with the
>>> 1.20210805 firmware (actually, I substituted rpi-poe-plus.dtbo from
>>> 1.20210831 which just changes the fan levels for the POE+). I'm testing
>>> with an rpi4B rev 1.5 with 'make -j4 buildworld' and the fan is keeping the
>>> cpu temperature below 65 degrees which is nice, especially since I set
>>> arm_boost=1 in config.txt which boosts the cpu frequency up to 1800 for
>>> this board.
>>>
>>> Does anyone have a pointer to the problem with firmware later than
>>> 20210805? Would it make any kind of sense to try to get the fix into
>>> releng/13.2 as an errata?
>>>
>>>
>>
>> --
>> Nuno Teixeira
>> FreeBSD Committer (ports)
>>
>

-- 
Nuno Teixeira
FreeBSD Committer (ports)