rockchip-rk3588/6.11: backport Marcin Juszkiewicz's "FriendlyELEC NanoPC-T6 improvements" v6 series to fix non-LTS and split LTS version of NanoPC T6

[rpardini]

rockchip-rk3588/6.11: backport Marcin Juszkiewicz's "FriendlyELEC NanoPC-T6 improvements" v6 series to fix non-LTS and split LTS version of NanoPC T6

• nanopct6-lts: a separate board for the LTS version of the NanoPC T6
  • Split has landed upstream for 6.12, and backported in a separate commit
  • I had already added the -lts version to the vendor (6.1) rockchip kernel a few months ago
• rockchip-rk3588/6.11: backport Marcin Juszkiewicz's "FriendlyELEC NanoPC-T6 improvements" v6 series to fix non-LTS and split LTS version of NanoPC T6
  • Marcin Juszkiewicz's series https://lore.kernel.org/all/[email protected]/ has landed upstream
    • see torvalds/linux@db1dcbe
    • thus we have 2 separate DTs, one for non-LTS, one for LTS; thus also 2 different Armbian boards (see separate commit)
  • drop my own patch that added SPI NOR to the T6, as that is now included in the base DT
  • this patch shall be dropped when 6.12-rc1 is released

[SuperKali]

The NanoPC T6 both versions should work with the same device tree, only in LTS some things have been changed, does it make sense to distinguish the two versions? It should also be maintained on the vendor kernel in this case, I own the first version, I don't know which one was sent to me.

In addition:
In this case we'll have to maintain two different versions, the old version that I think they will no longer produce by now and the new version.

[rpardini]

does it make sense to distinguish the two versions

Already discussed on kernel mailing list.
v6 series has already landed on Torvalds' tree.
No point arguing now...

[rpardini]

To be fair: depending on how u-boot implements this (eg if theres some ADC-based board revision detection code or such) then a single u-boot that decides fdtfile internally could be used, and a single Armbian board that does not specify FDT could be arranged. For now, u-boot is using 6.9's DTs, thus there is no such option.