mboehmer

Hi there, I have an overlay available for Odroid C4 (Kernel 6.6.51), which needs some testing in the field. It supports 12MHz operation max on the pins 19, 21, 23 and 24 on the GPIO header. In case you have a test case for that, let me know, and I can provide things to you. Michael

Thanks to Igor, I have a patch now in the build system (own branch - fix-spi-c4). Would be nice if someone could countercheck if that one also works in other place than mine.

Let me revive this thread, finally I found time to get into the issue again. I use the latest C4 server image (Ubuntu 24.04). Changes made so far: I added a line fdtfile=amlogic/meson-sm1-odroid-c4-spidev.dtb into the armbianEnv.txt, which seems at least to load the spidev kernel module. A /dev/spidev0.0 is created, and I can use the standard test program found on https://github.com/KnCMiner/spi-test/blob/master/spi-test.c It seems to work, there are no errors invoking the program, but the I/Os of SPI stay inactive, no matter what I do. gpioinfo shows the lines on PIN_19, PIN_21, PIN_23 and PIN_24 as "unused": Seem that basically the SPI controller is working, but the I/O mux is not setup correctly. Anyone who can contribute here? I can test with logic analyzer, in case some input is given to me

Will check after some other issues, thanks for your input! We use an Odroid C2 meanwhile, it is slow, but works.

Hi, after a long time I started up my C4 and tried both the standard download kernel as well as a home compiled one. I need SPI on the C4, so I changed the device tree to meson-sm1-odroid-c4-spidev.dtb, and see spidev kernel modul loaded, but no driver, and I don't get any signals on the corresponding pins. Any help is appreciated - would be great to have SPI working again... See you, Michael