Allwinner H3/H2+ dts question - regression?

[Eugene Sevastyanov]

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To whom it is interesting, the archive can be downloaded from http://opi.iptk.ru/OrangePi.tgz

> Hi,
> 
> Faced with exactly the same problem. Installed FreeBSD on the Orange Pi Zero board, but in the regular dts there is no description for emac. So I wrote my dts, partly taking information from the native file, and partly from Linux.
> To avoid rebuilding the whole kernel for the compilation of dtb, I created a separate project. In the attached archive, the project with the original dts and the received dtb for Orange Pi Zero. In fact, this is a copy of the structure of the native FreeBSD source tree with only the necessary files for DTS compilation.
> The script arm.sh takes care of all the work on creating a bootable flash drive. Uncomment there only the necessary sections. The script DOES NOT COPY the resulting dtb on the USB flash drive, be careful.
> 
> > Hi,
> > 
> > after some time I am playing a bit again with my Allwinner H3/H2+ based
> > boards. First I crossbuild world and kernel using svn rev. 324530,
> > after trying to upgrade older armv6 to current armv7 with no success,
> > put them on micro SD card and tested it. I found there are some dtb's
> > for this SOC, but none worked well. I tested ethernet, USB and thermal
> > devices. Ethernet worked only with sun8i-h3-nanopi-neo.dtb, but using
> > it USB did not work.
> > 
> > Then I upgraded sources to svn rev. 326187 and built new kernel
> > natively. While resulting kernel loads, none of dtb's provided have
> > ethernet working. Using nanopi-neo.dtb from old revision, originally
> > identical with sun8i-h3-nanopi-neo.dtb, provides me again with working
> > ethernet.
> > 
> > This raises a question what changed with dts sources and why we have no
> > stable working dts... By the way, I am using GENERIC-NOCTF-NOINET6
> > kernel (plain GENERIC, just with CTF and INET6 options removed),
> > currently on Orange Pi Zero and Orange Pi R1 boards, the later being
> > almost identical with the former, just there is second USB
> > connected ethernet port instead of usual USB port, and changed wifi
> > module, which does not works for us anyway.
> > 
> > I looked over our sources and could not find any definition of emac for
> > Allwinner H3/H2+ SoC. Is it just me or is it really somehow lost?
> > 
> > One more question, loosely related - how does one build dtb file? I
> > mean, I know I can just invoke 'make buildkernel -DNO_CLEAN' and all
> > dtb's for boards defined in makefile will be created. However, I think
> > it is handy to do it on board tested, because you can simply stop
> > u-boot, type
> > 
> > env set fdtfile sun8i-h2-plus-orangepi-zero.dtb;boot
> > 
> > and test new definition. Reboot is quick on Allwinner board I have, but
> > 'make buildkernel -DNO_CLEAN' takes ~ 3 minutes, additionally, your dts
> > needs to be mentioned in Makefile. I found it is actually done with
> > 
> > /usr/src/sys/tools/fdt/make_dtb.sh /usr/src/sys sun8i-h2-plus-orangepi-zero.dts /usr/obj/usr/src/arm.armv7/sys/GENERIC-NOCTF-NOINET6/modules/usr/src/sys/modules/dtb/allwinner
> > 
> > (in one line) invoked from some make command, but this does not give me
> > exactly the same result, probably environment differs. dtb file created
> > this way is larger than one produced with 'make buildkernel' command,
> > there are some fixups added. No idea whether it does any harm or not.
> >