Bone spi

[lorforlinux]

@jadonk @RobertCNelson please review my code, Everything has been tested on BBB and BBAI, This code depends on the compatibility PR beagleboard/BeagleBoard-DeviceTrees#17. Users should install compiled dtb from that PR before using these else boards will show FDT ERROR and won't boot.

To install the dtb file user can clone it onto the board and from within the directory run these commands according to which board they are using (kernel version might change in future, at this moment 4.19 is the target).

$ cd ~
$ git clone https://github.com/beagleboard/BeagleBoard-DeviceTrees.git
$ cd BeagleBoard-DeviceTrees/
$ make

BBB & BBBWL
$ sudo cp src/arm/am335x-boneblack-uboot-univ.dtb /boot/dtbs/4.19.*

BBAI
$ sudo cp src/arm/am5729-beagleboneai.dtb /boot/dtbs/4.19.*

[RobertCNelson]

Nak, use a new overlay name of your going to break 'old' kernels. I'm not going to deal with the user fallout when breaking everyone.

[lorforlinux]

Did you find some clashing files names? I am unable to find any previous overlay with those names. If there is something wrong with the chosen names please advise what names should I pick?

[RobertCNelson]

Sorry, you are correct, i see these don't clash at all...

[lorforlinux]

It's okay, I guess the real cape overlay might cause a problem for you as I have to update those also and I can't change the name there as the specific name is required for automatic loading of those overlays. Do you have any solution for that?