Hi Fabio,
Hi Lukasz,
On Mon, Mar 25, 2024 at 5:48 AM Lukasz Majewski lukma@denx.de wrote:
The case here is that I'm modifying the *-u-boot.dts{i} files only. In
The diff below shows that you are creating imx28-xea-1.dts and imx28-xea-2.dts for U-Boot consumption and renaming the upstream imx28-xea.dts to imx28-xea.dts.
create mode 100644 arch/arm/dts/imx28-xea-1.dts create mode 100644 arch/arm/dts/imx28-xea-2-u-boot.dtsi create mode 100644 arch/arm/dts/imx28-xea-2.dts rename arch/arm/dts/{imx28-xea.dts => imx28-xea.dtsi} (100%)
Yes, exactly.
other words, u-boot will not support features described in Linux DTS.
That's OK and this happens frequently.
For example, upstream devicetree may describes audio codec, but U-Boot does not support audio playback.
Devicetree should be OS agnostic.
Ok.
In U-Boot, we want to re-use the upstream Linux devicetree files 'as-is'.
Yes, I'm fully aware of this. However, the U-Boot size increases rapidly...
Adding -u-boot.dtsi files is OK though.
Yes, this is a good way (with /delete-node) to reduce the size.
Can you convert the imx28-xea board to OF_UPSTREAM available in the U-Boot next branch?
I will check if XEA can be moved to OF_UPSTREAM.
Hence, the rename of files (which would be in sync with Linux at some point) looks like not related to Linux DTS (as even after re-sync with upstream Linux those changes will not be in Linux DTS).
I did not understand this part, do you mean that Linux will also do the imx28-xea.dts => imx28-xea.dtsi rename and will also have the new imx28-xea-1.dts and imx28-xea-2.dts?
Yes. Exactly. I started the conversion from u-boot. Updating Linux DTS will be next.
Regards,
Fabio Estevam
Best regards,
Lukasz Majewski
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