[U-Boot] [RFC PATCH v1 0/9] Add support for applications of overlays in SPL

[Michal Simek]

On 25. 03. 19 9:08, Michal Simek wrote:
> On 22. 03. 19 15:39, Jean-Jacques Hiblot wrote:
>>
>> The purpose of this series is to provide the SPL with ability to apply
>> overlays for u-boot. this is only a RFC so far, to get a feedback on the
>> approach.
>>
>> Our use-case is the support of the daughter boards of the AM65x EVM. In
>> Linux, each board is supported by a unique overlay. The presence of the
>> boards is detected at runtime, and some useful features (like USB) are
>> implemented on those daughter boards. Instead of providing multiple dtbs
>> and fall in a combinatorial pit, we propose to use DT overlays.
> 
> Not sure if you have it on these boards too but I expect you are able to
> detect base board with this code board/ti/common/board_detect.c
> 
> How do you detect these daughter cards? Is there additional I2C
> connection to them and they have on board eeprom with any format for
> detection?
> Something similar what it is part of FMC standard/VITA 57.1 with using
> FRU spec for daughter card description?
> Anyway we are working on FRU parser exactly for this purpose.
> 
> Do you also need to apply that overlays in SPL?
> Isn't it enough to apply them as the part of board_fdt_blob_setup()?

I see v2 now but without answering my questions here.

M