On Wed, Apr 12, 2023 at 07:38:12AM +0000, Mathew McBride wrote:
I am intensively working on updating the current "production" Ten64 (NXP LS1088A) firmware from v2020.07 to the latest U-Boot, with the hope of taking advantage of bootstd/bootflow and other improvements.
One desire I have is to have U-Boot "supply" the device tree which is used for EFI boot, rather than our current method of reading the DTB from a flash partition with commands (sf read etc.) and plugging that into the distroboot process.
Indeed, once we syncronise the U-Boot FDT with the Linux one, the bootflow method "Just Works" with the control FDT, without us having to plug an external FDT into the process.
(Note: the bootstd conversion for Ten64 will be coming in a later commit. The DTS on it's own is only one part of the puzzle)
The flow of this series is:
Fix a crash I found in the U-Boot FDT fixup for Layerscape
The previous U-Boot copy of the fsl-ls1088a.dts did not have direct alias to the "crypto" node, triggering a crash when FDT fixup tried to operate on it.
Enable DM_SERIAL for Ten64 (mirrors how it was enabled for LS1088A-RDB and LS1088A-QDS recently)
Move all U-Boot "tweaks" into a -u-boot.dtsi file. Each board will have it's own <boardname>-u-boot.dtsi, which includs the SoC-specific fsl-ls1088a-u-boot.dtsi.
For all hardware that was in U-Boot's fsl-ls1088a.dtsi, and not in the "correct" place (under /soc), move them into /soc and adopt the Linux kernel definition.
PCIe needed special treatment as it's U-Boot binding was slightly different, as well as different compatible strings (match a different U-Boot driver) for MDIO, USB and fsl-mc among others.
At this point, Linux is able to boot on the Ten64 using U-Boot's FDT (passed to it via EFI) with major hardware (Ethernet, USB, PCIe) functional.
Finally, copy over the U-Boot fsl-ls1088a.dtsi with the Linux kernel version. They are now bit-for-bit identical, with the U-Boot tweaks contained externally.
Similarly for the Ten64 DTS - fsl-ls1088a-ten64.dts is now identical to the kernel version.
This builds upon the recent conversion of the LS1088A to DM_SERIAL[1]. I used a similar syncronisation for the LS1028A[2] as a guide.
[1] - "Convert LS1088A and LX2160 to DM_SERIAL" patch series https://patchwork.ozlabs.org/project/uboot/list/?series=346392&state=%2A...
[2] - "arm: dts: ls1028a: sync device tree with linux" patch series https://patchwork.ozlabs.org/project/uboot/list/?series=265457&state=%2A...
Thanks a lot, Mathew! I really appreciate the work that you put into this series.
For the entire series:
Reviewed-by: Ioana Ciornei ioana.ciornei@nxp.com Tested-by: Ioana Ciornei ioana.ciornei@nxp.com # on LS1088A-RDB
Ioana