enables spidev interfaces

[schubter]

by patching the dtb as closely as possible to raspbian, only difference
the gpio ports start with an offset of 458

[stapelberg]

Thanks for this PR!

Would you mind also rebuilding the kernel and amending your changes to contain the updated vmlinuz file, too?

[schubter]

Hi,

i'll gladly add the updated dtb but honestly i'd rather not append the vmlinuz built by me. i am not sure you can verify that i've not tampered with the resulting binary or even used the code in the repo to build the image in the first place.

[stapelberg]

Oh, I’ll rebuild myself and verify the checksum. It’s just nice to have the change represented in one git commit.

[schubter]

alright, that sounds fine. should have it updated in a few hours. my build box is slow ^^

[stapelberg]

Thanks, this looks good! Can you squash your commits before I merge this please? We would like one logical commit per change in our git history.

[chlunde]

@schubter Cool, I had to rebase your commit (https://github.com/chlunde/kernel/commit/886bf5909ac0face5be509af4b697f683124a38f) but now I also got SPI to work with an e-ink display with periph.io@master.

If you rebase again maybe it can be merged, unless 5.6.6 is released and there's a new merge conflict :)

[stapelberg]

Independent of merging this PR: can this change also be submitted for inclusion in the upstream Linux kernel?

[schubter]

not sure, raspbian is handling this kind of enabling via overlays.

[stapelberg]

not sure, raspbian is handling this kind of enabling via overlays.

Yeah, but upstream linux doesn’t, so it doesn’t really matter how raspbian solves this :)

[schubter]

good point, let me see if I can work thru the requirements to get something added to the kernel

[schubter]

Alright rebased. Thanks @chlunde

[stapelberg]

Thanks!