[U-Boot] pre-reloc fdt scan for non-top-level nodes

[viktor babrian]

Hi,

sorry for flooding; I have already sent this email to u-boot-dm. I
just wonder if that list is alive.

as far as I understood, the pre-reloc device binding of drivers having
DM_FLAG_PRE_RELOC flag set is only performed for top-level devices -
at least that is what I experience. Is this intentional? What is the
concept there?
I am trying to use a spi slave display that is by default described as
a node under root/soc/spiX. We have the device working under Linux. I
understand these displays are not supported as is in u-boot so I
ported some Linux code and made some minor mods in the video uclass.
Still I do not have memory reserved for the frame-buffer and debugging
shows that it is because bind() is not invoked pre-reloc. And it is
not invoked because dm_extended_scan_fdt() parses top-level nodes
only.
I wonder if that pre-reloc scan is so for some purpose because a
recursive scan would seemingly be justified in my case.
(or am I just missing something?)

Any comments are welcome,
Thanks,
Viktor