Re: Need testers for ALPHA RPi-5 fan control, GE NIC, WiFi drivers for FreeBSD-CURRENT

On 6/15/26 20:36, Mark Millard wrote:
> On 5/29/26 17:42, Jeremy McMillan wrote:
>>
>>
>> If anyone has a Raspberry Pi 5 that's not dedicated to anything
>> important, I'd appreciate some help testing this:
>>
>> https://github.com/aphor/FreeBSD15-RPi5-modules <https://github.com/
>> aphor/FreeBSD15-RPi5-modules>
>>
>> The README.md is up to date, but other docs in there might be stale.
>>
>> IDK if I should try to implement Bluetooth yet. I haven't tried using
>> FreeBSD bluetooth with working known-good drivers on supported hardware,
>> but when this is relatively complete I'm planning to do some bug fixing
>> and performance improvements where necessary in a BETA phase, then a
>> rewrite from scratch for maintainability that can be submitted to
>> FreeBSD-CURRENT. I know the repo says FreeBSD15, but I'm currently
>> building against FreeBSD-16-CURRENT. I've had feedback that the fan
>> control works fine on FreeBSD-15.
>>
>> I also don't know what I should do about GPIO testing. I'd appreciate
>> any pointers if other people work with RPi hardware and have any
>> pointers for testing GPIO stuff. I think there's a few pins that can do
>> DAC and ADC and others that can do PWM (like the ones used for the fan
>> header) when programmed to different modes. I have an oscilloscope, but
>> I'd like to automate testing as much as possible because my spare time
>> is precious.
>>
>> It seems like RPi-5 will be around for a while under the current market
>> conditions for the semiconductor business, and it is my hope that
>> FreeBSD can deserve and get more attention and support from Broadcom and
>> Raspberry Pi. Also, I have my own projects :)
>>
>> Thanks in advance for your attention!
> 
> https://github.com/aphor/FreeBSD15-RPi5-modules/blob/main/README.md uses
> the terminology:
> 
> hw.rpi5.fan.temp0: Level 1 trigger threshold (milli-°C ...)
> 
> hw.rpi5.fan.temp1: Level 2 trigger threshold
> 
> hw.rpi5.fan.temp2: Level 3 trigger threshold
> 
> hw.rpi5.fan.temp3: Level 4 trigger threshold
> 
> 
> What I found was:
> 
>  # sysctl hw.rpi5
> hw.rpi5.fan.rpm: 0
> hw.rpi5.fan.current_state: 0
> hw.rpi5.fan.cpu_temp: 47400
> hw.rpi5.fan.speed3: 255
> hw.rpi5.fan.speed2: 255
> hw.rpi5.fan.speed1: 255
> hw.rpi5.fan.speed0: 0
> hw.rpi5.fan.temp3_hyst: 5000
> hw.rpi5.fan.temp2_hyst: 5000
> hw.rpi5.fan.temp1_hyst: 5000
> hw.rpi5.fan.temp0_hyst: 5000
> hw.rpi5.fan.temp3: 75000
> hw.rpi5.fan.temp2: 67500
> hw.rpi5.fan.temp1: 60000
> hw.rpi5.fan.temp0: 50000
> 
> (I've not tested for temp0..temp3 not being in increasing order: only
> increasing order. But I do not know the general intent, just likely the
> normal-use expectation.)
> 
> So: hw.rpi5.fan.cpu_temp < hw.rpi5.fan.temp0 leads to use of
> hw.rpi5.fan.speed0
> 
> (Equality is difficult to test for, so may be that should be <=.)
> 
> 
> And:
> 
> 
> # sysctl hw.rpi5
> hw.rpi5.fan.rpm: 9661
> hw.rpi5.fan.current_state: 1
> hw.rpi5.fan.cpu_temp: 46300
> hw.rpi5.fan.speed3: 255
> hw.rpi5.fan.speed2: 255
> hw.rpi5.fan.speed1: 255
> hw.rpi5.fan.speed0: 255
> hw.rpi5.fan.temp3_hyst: 5000
> hw.rpi5.fan.temp2_hyst: 5000
> hw.rpi5.fan.temp1_hyst: 5000
> hw.rpi5.fan.temp0_hyst: 5000
> hw.rpi5.fan.temp3: 75000
> hw.rpi5.fan.temp2: 67500
> hw.rpi5.fan.temp1: 60000
> hw.rpi5.fan.temp0: 0
> 
> So: hw.rpi5.fan.temp0 < hw.rpi5.fan.cpu_temp < hw.rpi5.fan.temp1
> (mathematics style interpretation of being in the range) leads to use of
> hw.rpi5.fan.speed1
> 
> (Again, equality is not clear via being hard to test for.)
> 
> That would suggest that:
> 
> hw.rpi5.fan.temp2 < hw.rpi5.fan.cpu_temp < hw.rpi5.fan.temp3 would lead
> to use of  hw.rpi5.fan.speed3
> 
> 
> A problem? . . .
> 
> What about hw.rpi5.fan.temp3 < hw.rpi5.fan.cpu_temp ? There is no
> hw.rpi5.fan.speed4 for it to use. But:
> 
> # sysctl hw.rpi5
> hw.rpi5.fan.rpm: 0
> hw.rpi5.fan.current_state: 4
> hw.rpi5.fan.cpu_temp: 65550
> hw.rpi5.fan.speed3: 0
> hw.rpi5.fan.speed2: 0
> hw.rpi5.fan.speed1: 0
> hw.rpi5.fan.speed0: 0
> hw.rpi5.fan.temp3_hyst: 5000
> hw.rpi5.fan.temp2_hyst: 5000
> hw.rpi5.fan.temp1_hyst: 5000
> hw.rpi5.fan.temp0_hyst: 5000
> hw.rpi5.fan.temp3: 60000
> hw.rpi5.fan.temp2: 52000
> hw.rpi5.fan.temp1: 51000
> hw.rpi5.fan.temp0: 50000
> 
> So it reports that there are states: 0, 1, 2, 3, and 4 but gives no
> explicit control over the speed for state 4.
> 
> That wording takes things as reported by the code. It might not be
> following the actual intent does not involve a state 4.
> 
> Given (an arbitrary, general illustration):
> 
> 0 as a fixed  low bound, likely implicit.
> MAXT (say) as a fixed high bound greater than 60000,
> also implicit:
> (illustrated for an unsigned context)
> 
>     0 .. 19999 : hw.rpi5.fan.speed0
> 20000 .. 39999 : hw.rpi5.fan.speed1
> 40000 .. 59999 : hw.rpi5.fan.speed2
> 60000 .. MAXT  : hw.rpi5.fan.speed3
> 
> It only takes the 3 explicit values: 20000, 40000, 60000 (or whatever
> values) to identify up to 4 speeds, 0 and MAXT not being needed inputs.
> 
> 
> FYI: the maximum temperature that I observed with the fan disabled (rpm
> always zero) was (so far):
> 
> # sysctl hw.rpi5.fan.cpu_temp
> hw.rpi5.fan.cpu_temp: 85900
> 
> Once observed with that, it also got down to: 82600
> 
> The test was letting openssl speed run.
> 
> 

I thought to try setting hw.rpi5.fan.speed3=255 despite
hw.rpi5.fan.current_state: 4 and . . .

# sysctl hw.rpi5
hw.rpi5.fan.rpm: 9746
hw.rpi5.fan.current_state: 4
hw.rpi5.fan.cpu_temp: 80950
hw.rpi5.fan.speed3: 255
hw.rpi5.fan.speed2: 0
hw.rpi5.fan.speed1: 0
hw.rpi5.fan.speed0: 0
hw.rpi5.fan.temp3_hyst: 5000
hw.rpi5.fan.temp2_hyst: 5000
hw.rpi5.fan.temp1_hyst: 5000
hw.rpi5.fan.temp0_hyst: 5000
hw.rpi5.fan.temp3: 60000
hw.rpi5.fan.temp2: 52000
hw.rpi5.fan.temp1: 51000
hw.rpi5.fan.temp0: 50000

It looks like:

hw.rpi5.fan.temp2 < hw.rpi5.fan.cpu_temp selects hw.rpi5.fan.speed3 even
when hw.rpi5.fan.temp3 < hw.rpi5.fan.cpu_temp

It may be that hw.rpi5.fan.temp3 is ignored (at least when they are in
increasing order).

Later it cooled down more and was:

# sysctl hw.rpi5
hw.rpi5.fan.rpm: 9920
hw.rpi5.fan.current_state: 3
hw.rpi5.fan.cpu_temp: 55650
hw.rpi5.fan.speed3: 255
hw.rpi5.fan.speed2: 0
hw.rpi5.fan.speed1: 0
hw.rpi5.fan.speed0: 0
hw.rpi5.fan.temp3_hyst: 5000
hw.rpi5.fan.temp2_hyst: 5000
hw.rpi5.fan.temp1_hyst: 5000
hw.rpi5.fan.temp0_hyst: 5000
hw.rpi5.fan.temp3: 60000
hw.rpi5.fan.temp2: 52000
hw.rpi5.fan.temp1: 51000


-- 
===
Mark Millard
marklmi at yahoo.com