On Fri, Sep 13, 2024 at 1:11 AM Marek Vasut marex@denx.de wrote:
On 9/12/24 8:06 AM, Lothar Rubusch wrote:
Introduce device-tree files for Enclustra Intel AA1 SoMs and related support.
- Mercury AA1
The setup depends on a selected boot mode. Various fragments for SD/MMC and QSPI flash boot are provided.
In combination, the following Enclustra carrier boards are supported:
- ST1
- PE1
- PE3
Signed-off-by: Andreas Buerkler andreas.buerkler@enclustra.com Signed-off-by: Lothar Rubusch l.rubusch@gmail.com
arch/arm/dts/ME-AA1-270-2I2-D11E-NFX3.dtsi | 14 + arch/arm/dts/ME-AA1-270-3E4-D11E-NFX3.dtsi | 14 + arch/arm/dts/ME-AA1-480-2I3-D12E-NFX3.dtsi | 15 + arch/arm/dts/Makefile | 2 + arch/arm/dts/enclustra-aa1.dts | 32 ++ .../dts/socfpga_arria10_mercury_aa1_handoff.h | 307 ++++++++++++++++++ .../dts/socfpga_enclustra_mercury_aa1.dtsi | 179 ++++++++++ ...cfpga_enclustra_mercury_aa1_qspi_boot.dtsi | 18 + ...fpga_enclustra_mercury_aa1_sdmmc_boot.dtsi | 18 + .../dts/socfpga_enclustra_mercury_pe1.dtsi | 7 + .../dts/socfpga_enclustra_mercury_pe3.dtsi | 8 + .../dts/socfpga_enclustra_mercury_st1.dtsi | 8 +
Is there any chance to upstream these DTs to Linux first , and then let them all trickle into U-Boot through dts/upstream/ ?
This is the tricky one. In principle, as it is supposed to be build on our side this is not the case. For the kernel, we prefer to work with DT overlays (.dtbo) where on the u-boot side we only need some basic functionality and not everything declared. So, currently there are differences.
Another point here for me to understand would be the following. If I upstream some DT files to the kernel it might take time until they go to anything released there. So, upstreaming u-boot would wait on that kernel release, right? In such case, I really prefer to upstream the DT files as is to u-boot first. Then / In parallel try to upstream the files to the kernel. And update the u-boot DT set to point to the kernel DT files when they are released. Could this be an approach?
Anyway, it might be that next week, I might discuss that directly in person to get a better idea what could be a way for me with those u-boot files. I'm coming back to this topic then. If you find some time, please let me know what you think about it.