Add swig/host build dependency [Was: Re: [PATCH] uboot-mediatek: clean up build dependencies]

[Daniel Golle]

On Fri, Nov 18, 2022 at 09:38:55AM -0500, Peter Naulls wrote:
> On 11/17/22 14:33, Petr Štetiar wrote:
> > Daniel Golle <daniel at makrotopia.org> [2022-11-17 17:01:43]:
> > 
> > Hi,
> > 
> > > Add swig/host to build dependencies.
> > 
> > this doesn't looks like a cleanup as commit subject suggests, but rather
> > contrary :-)
> 
> Thanks all in any case for looking at this. We have a possible need to modify
> our vendor (or vendor's vendor, hard to be sure) U-Boot.  On our MT7621
> boards we have vendor versions 2.0.0 aka Ralink version 2.0.0 and 1.1.3 aka
> Ralink
> version 4.3.0.0.  And I have the Mediatek SDK with source for what claims to
> be version 5.0.0.0.
> 
> Attempts to clarify with the vendor what's going on or get exact sources
> or history have proven challenging due to timezones and language barriers,
> and I think they simply may not know.
> 
> Obviously using the OpenWrt version is going to be probably more satisfactory,
> although there may well be vendor changes to support MCU etc.
> 
> It's been many many years since I did u-boot work, but is there some magic to
> load u-boot image into RAM on mt7621 and run it to try it out before flashing?
> I know there are configuration options for DDR and CPU frequency, etc, but
> tftping the u-boot binaries variously and using 'go' result in an apparently
> stopped system.

@lynxis has done this on Aarch64 MediaTek SoC just a few days ago and
wrote a nice blog post summarizing the process. Probably most of it is
the same on MIPS-based targets:

https://lunarius.fe80.eu/blog/openwrt-u-boot-boot-u-boot.html


> 
> This is the only meaningful documentation I have found.
> 
> https://u-boot.readthedocs.io/en/latest/board/mediatek/mt7621.html
> 
> Thanks!
> 
> 
>