Rasclock (PCF2127 ) Hardware Clock FreeBSD 12.0

[Stefan Parvu]

Sone differences between our systems

 * Im using Rasclock 4.0, you are in 4.2 

 * Im using RBPI3B+, you are in RBPI2

Not sure if these really matter but just in case Im mentioning.

> 
> It occurred to me: are you sure you're using the fixed driver?  One of
> the problems before the fix was that a read would succeed, but return
> the wrong values.  So the status register reads might be getting a
> wrong value and interpretting that as the "battery failed bit is set”.
> One thing that comes to mind:  you're using this as a module, but is
> the nxprtc driver already built in to the kernel?  I think if it is and
> you added nxprtc_load=YES to loader.conf, it'll load the module but
> then still use the driver already in the kernel.

huh. Are you saying the nxprtc driver is already built-in the kernel ? 
Why ? Shouldn’t that be just a driver what you can load on demand,
if users need ?

Yes, I do have under loader.conf nxprtc_load=“YES”. But still some questions 
here:

* if I do not load the driver under loader.conf, nothing works, I cannot see the
clock or use it anyhow 

* how can I make sure there is NO nxprtc within kernel ? Can I see the routines
function calls somehow, if i kldunlod the nxprtc driver ?

I do believe Im using the right thing after your commit. I can again double check that

Stefan