Rasclock (PCF2127 ) Hardware Clock FreeBSD 12.0

[Stefan Parvu]

> The bottom line is that you need to rebuild the nxprtc driver with this
> patch applied:
> 
> https://svnweb.freebsd.org/base/head/sys/dev/iicbus/nxprtc.c?r1=350016&r2=348184&view=patch <https://svnweb.freebsd.org/base/head/sys/dev/iicbus/nxprtc.c?r1=350016&r2=348184&view=patch>


okay. Let me see if I can do this. Some questions:

* can I build only the driver without rebuilding all kernel components ?

* most likely I need the kernel source code, apply the patch for nxprtc driver and build the driver

* If I build the driver on a FreeBSD 12.0 development env can I take the resulting driver and 
copy it over to different vanilla FreeBSD 12.0 RELEASE installations ?

Thanks,
Stefan