A64 - Enable SPI0 on UEXT

[oli_sbr]

Hello,

I want to use the A64-OLinuXino-1Ge16GW on a project where I need a lot of UART.
UART0 is used for debug purposes, UART2 and 3 are available on external connectors.
(by the way, I have an issue with UART3 not working : https://www.olimex.com/forum/index.php?topic=7671.msg29065#msg29065)

I want to add more UART in the future. I plan to use a NXP SC16IS762 dual UART with the SPI interface on UEXT. A kernel driver is available, which is nice. Nevertheless, I can't enable SPI0 on UEXT.

I have tried to enable spi-spidev overlay to make some tests, with armbian-config (Armbian 20.05.2 Buster, kernel 5.4.43-sunxi64).
After reboot, there is no

Code Select Expand

/dev/spidev*
I also tried spi-add-cs1 overlay with the same result.

I don't have any SPI Flash on the board.

Thanks

[LubOlimex]

Looking at the link of the UART port problem it seems you are using Armbian image, right?

Try the Olimage and try the "olinuxino-overlay" script. You can get it from here:

http://images.olimex.com/release/a64/

If you wonder which release to get, get the bionic base 7z archive.

You can further inspect the scripts we use here:

https://github.com/OLIMEX/olinuxino-overlays/tree/upstream/sun50i-a64

[oli_sbr]

Hello Lub,

I got /dev/spidev0.0 appears with the Olimage and proper overlay, which is nice.
I will dive further to make it work as wanted.

Thank you.