How to arrange for patches to be applied to u-boot before it is built by the Layerscape SDK v17.12

[kuta42]

We've produced a board starting from the FRDM LS1012A design. One of the enhancements we've added is an SD card slot, from which we'd like to be able to boot using u-boot. I have the patches to u-boot (and a replacement RCW file) for the board that worked using the QorIQ SDK v17.03; what's the best way to incorporate them into the build of the boot partition when using the Layerscape SDK v17.12?

[Pavel]

Look at the following pages:

https://www.denx.de/wiki/U-Boot/Patches

https://groups.google.com/forum/#!topic/beagleboard/PTjm3nD_RTA

Have a great day,
Pavel Chubakov

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[kuta42]

I guess I'm still not being clear enough. I'll try again:

1. I have patches to u-boot for our board that I was able to apply to the build of u-boot when using the QorIQ SDK v17.03 by creating a .bbappend file for its recipe. Unfortunately, the Layerscape SDK v17.12 doesn't useBitBake recipes, so how do I tell flex-builder to apply these patches before it builds u-boot?
2. I have a replacement RCW file for our board. How do I tell flex-builder to use it when building the boot partition instead of the one for the FRDM-LS1012A board?

[kuta42 · Accepted solution]

I have resolved this by considering our design to be a new board and adding files for it to the u-boot tree. You can consider this question as answered.

[Pavel]

The LS1012a supports only QSPI as source for RCW and PBL. See the Section 4.4.4.1 and bits 192-195 of the RCW in the LS1012a Reference Manual:

https://www.nxp.com/docs/en/reference-manual/LS1012ARM.pdf

Linux BSP supports only QSPI for u-boot source on the LS1012a board.

Have a great day,
Pavel Chubakov

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[kuta42]

Understood, but my question is: how best to incorporate patches to u-boot into build of the boot partition? (I've updated the title to better reflect the actual question.)