[U-Boot] [RFC] odroid DTB support

[Guillaume Gardet <guillaume.gardet@free.fr>]

Hi,


Le 12/10/2015 01:45, Tom Rini a ?crit :
> On Fri, Oct 09, 2015 at 02:35:24PM +0200, Guillaume Gardet wrote:
>>
>> Le 09/10/2015 14:23, Przemyslaw Marczak a ?crit :
>>> Hello Guillaume,
>>>
>>> On 10/09/2015 02:11 PM, Guillaume Gardet wrote:
>>>> Hi Przemyslaw,
>>>>
>>>> I would like to add DTB support for odroid board to be able to boot
>>>> upstream kernel easily.
>>>>
>>>> I see 2 ways to do it:
>>>> * Add CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG support to set 'board_rev'
>>>> and 'board_name' env vars. Then, you need a 'findfdt' script to check
>>>> 'board_rev' and set fdtfile accordingly (as done for OMAP4 panda board)
>>>> * Set fdtfile name directly (as done for rpi or igep00x0).
>>>>
>>>> What would you prefer?
>>>>
>>>>
>>>> Guillaume
>>>>
>>>>
>>> Is, that the reason of adding the boot script by your last patches?
>> No, we need a boot script, because this is the way we boot our
>> openSUSE images (we boot with an initrd and some special bootargs).
> Hang on, exynos stuff uses the generic distro hooks.  Can you take a
> look at doc/README.distro and see what openSUSE can hook into / provide
> some feedback on what needs doing?  Thanks!

This is true for odroid XU3 (Exynos5 based) but Odroid U3/X2 (Exynos4 based) has no generic distro hooks at the moment.

What we need:
* Boot on boot.scr (mainly to define kernel name, initrd name and bootargs)
* Use (pre-defined) fdtfile, or be able to define it manually if not already set (or not in sync with Linux kernel)


Guillaume