Allwinner H3 - OrangePi Plus Status

[Emmanuel Vadot]

On Wed, 10 Aug 2016 10:21:12 +0200
Mattia Rossi <mattia.rossi.mailinglists at gmail.com> wrote:

> Hi all again,
> 
> I've managed to build everything, and to create the image etc., but I'm 
> having troubble with the .dtb file
> >
> > the .dtb file goes in /boot/dtb
> > Also realised that my attachments did not go through, in case their 
> > air needed
> > let me know.
> >
> >
> 
> So, I've added sun8i-h3-orangepi-plus.dts to the dtb/allwinner Makefile, 
> so that it gets built with the MODULES_EXTRAS option in the kernel 
> config file.
> 
> So far so good, the .dtb exists as sun8i-h3-orangepi-plus.dtb and is 
> installed in /boot/dtb which is placed on the ufs filesystem (2nd 
> partition of the SD card).
> 
> When I switch on the device, u-boot and ubldr start fine, but ubldr 
> complains about the missing .dtb - So obviously it's confused by 
> something. I guess the .dtb is either in the wrong place or it has the 
> worng name. In either way, I need to tell ubldr what to look for. How do 
> I do that?

ubldr will load the file described by the "fdtfile" u-boot variable (ubldr import the needed uboot variables).
The uboot variable is hardcoded in the uboot port patch (https://svnweb.freebsd.org/ports/head/sysutils/u-boot-olimex-a20-som-evb/files/patch-include_configs_sunxi-common.h?revision=418446&view=markup#l44).
Alternativelly you can do from ubldr prompt : 
load -t dtb filename
It will search for the file in /boot/dtb (or you can use the fullpath if it's elsewhere)

> On my dreamplug I don't use ubldr, but boot kernel.bin directly from 
> u-boot. There I use the following kernel config options:
> 
> options         FDT_DTB_STATIC
> makeoptions     FDT_DTS_FILE=dreamplug-1001.dts
> 
> which cause the .dtb to be built into the kernel. Would that work with 
> ubldr as well? (I don't need a separate .dtb, so whatever works is fine 
> with me..
> 
> Do you have any hints?
> 
> Thanks,
> 
> Mat
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-- 
Emmanuel Vadot <manu at bidouilliste.com>