Allwinner H3 - OrangePi Plus Status
Emmanuel Vadot
manu at bidouilliste.com
Wed Aug 10 12:19:24 UTC 2016
On Wed, 10 Aug 2016 13:06:48 +0200
Mattia Rossi <mattia.rossi.mailinglists at gmail.com> wrote:
>
>
> Am 10.08.2016 um 11:56 schrieb Emmanuel Vadot:
> > On Wed, 10 Aug 2016 11:07:04 +0200
> > Mattia Rossi <mattia.rossi.mailinglists at gmail.com> wrote:
> >
> >>> 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)
> >>>
> >> It's weird that such a thing is hardcoded.. Although it seems that it's
> >> set through CONFIG_DEFAULT_DEVICE_TREE, so I guess it can be controlled
> >> through a config file (Makefile?)
> > Not weird at all since uboot is always compiled for one particular board.
> > The CONFIG_DEFAULT_DEVICE_TREE is set in the uboot config file (configs/boardname) but it is currently not used as we override the environ in the board include file.
> >
> Okay, so just to get the whole picture:
> If I want everything set up for an OrangePi Plus 2 I need the following
> puzzle pieces
>
> A u-boot port which points to an orangepi plus 2 dtb
Yes, just copying the orangepi-one port and modify it should be ok (if u-boot 2016.07 have a a config for this board)
> An orangepi plus 2 dts/dtb (which might differ from the plus dtb, I
> don't know yet, there are no real specs available)
Yes, as said earlier in this thread you will need to wait for the linux 4.7 dts import for this.
> An orangepi plus 2 kernel config (which like the .dts might differ from
> the standard allwinner config)
No, the ALLWINNER kernel config is what you should use.
> And of course kernel support for all the (as of yet unknown) devices of
> the board.
Yes :)
> I'm going to work towards that, depending on how much information I can
> gather about the board and depending on how much it differs from the
> plus version.
>
> For now I'll see if the plus version of everything works :-) - wish me
> luck ;-)
>
> Cheers,
>
> Mat
--
Emmanuel Vadot <manu at bidouilliste.com>
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