Converting a 7i76e config to 7c81/7i76 pair

I could never get a spi device with bookworm tried for about a day or so but no luck, so I just went with Raspbian based on Bullseye. Have no trouble at all, even works with the Spartan-6 dev board I have with 7c81 firmware loaded.
Seriously Pete from MESA is a top guy. His range of products and support take Linuxcnc to the next level.

Cant do this anymore bye all wrote:

I could never get a spi device with bookworm tried for about a day or so but no luck, so I just went with Raspbian based on Bullseye. Have no trouble at all, even works with the Spartan-6 dev board I have with 7c81 firmware loaded.
Seriously Pete from MESA is a top guy. His range of products and support take Linuxcnc to the next level.

I think this has been resolved on Bookworm recently but you will have to compile from source to get the changes (which I am doing now).
The issue was we used a non-standard way to talk to the GPIO's which became depreciated in Bookworm. Andy has done some changes to get gpio working. He has also written a new gpio driver that uses the gpiod library which is the correct method. BUt I don't think its been included yet.

I was under the impression that the hm2-rpspi required a entry in the dev folder for spi and the Hal gpio driver was a different beast.

I don't know as I have never used any GPIO stuff. Perhaps by the end of the week I will have a working PI image. It is certainly worth testing. If it was still an issue, report it on git and it might get fixed.

I found the spi-bcm2835.c source in with the kernel source. I will take a look at the possibility of setting spi enable as an option in the kernel configuration.

With the debian package linux-image-6.1.0-11-rt-arm64-unsigned_6.1.38-4_arm64.deb spi-bcm2835 is configured as a module.

Cant do this anymore bye all wrote:

With the debian package linux-image-6.1.0-11-rt-arm64-unsigned_6.1.38-4_arm64.deb spi-bcm2835 is configured as a module.

Does that mean you have been chasing a red herring?

Nah there seems to be an issue with device overlays, which the mainline kernel doesn't seem to support.
Found this bit of info Raspbian kernel config:

Debian arm64 rt kernel config

Further to that, which maybe of interest, the Raspbian team are still working on a Bookworm release.
I guess that they patch the kernel for the device overlay tree which is needed to need to get the whole spi overlay loaded.

I have spi-bcm2835 loading on boot now. I still don't have the /dev/spi0.0 and/or /dev/spi0.1 being created.
I don't find a module spidev. It looks like it should be a kernel module but some of the info sounds like it may be a user module for talking to spi-bcm2835.