no dev.cpu on RPI-B

[Bernd Walter]

On Wed, Apr 10, 2019 at 02:35:08AM +0200, Bernd Walter wrote:
> On Wed, Apr 10, 2019 at 09:59:29AM +1000, Peter Jeremy wrote:
> > On 2019-Apr-10 00:39:18 +0200, Bernd Walter <ticso at cicely7.cicely.de> wrote:
> > >I was hoping for dev.cpu.0.temperature as it exists on the Pi3.
> > >Is something missing in my setup (using 12-RELEASE kernel from image),
> > >or is there no support for that?
> > 
> > I ran into this when I switched from the FreeBSD FDT to the default Linux FDT.
> > The latter is missing the CPU description.  The fix is to create your own
> > FDT overlay and get the loader to load it.  There's a similar problem with the
> > SPI controller.
> 
> Thank you very much.
> That makes sense, didn't thought about FDT because it works on a Pi3
> with the same 12.0-RELEASE.
> I'm already using overlays on those systems for SPI, my own APA102 LED driver
> and DS18B20 sensors.
> It is for an LED matrix running 24 RPI1 with 800 LEDs each.
> The systems are nfsroot, but I think the dtso are loaded from the micro-SD
> cards :-(
> Well - I guess I setup a bootscript on the NFS server to update the data on
> the cards.

Much better, but still no temperature:
[52]matrix# sysctl dev.cpu
dev.cpu.0.%parent: cpulist0
dev.cpu.0.%pnpinfo: name=cpu at 0 compat=arm,1176jzf-s
dev.cpu.0.%location: 
dev.cpu.0.%driver: cpu
dev.cpu.0.%desc: Open Firmware CPU
dev.cpu.%parent: 

Will take a deeper look into it and compare to the previous FDT once I
find time.

-- 
B.Walter <bernd at bwct.de> http://www.bwct.de
Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm.