Question: Activating/using SPI on SOQuartz

[hughsheehy]

Just realized I should probably be commenting/asking here

Discussion was here. https://www.reddit.com/r/PINE64official/comments/122qcyv/comment/jenpkh2/?utm_source=share&utm_medium=web2x&context=3

Argh. Confusion reigns.

The devices I'd like to use are "normal" devices and don't seem to need or have fancy drivers in other hardware like Pis. (Or where there's a standard Qualcomm driver).

And when I look in the Linux kernel, I see things like this. https://github.com/torvalds/linux/blob/master/arch/arm64/boot/dts/rockchip/rk3566-soquartz-cm4.dts

Which shows the board for the SOQuartz, but with SPI "disabled". If I set that to "okay" then i still don't see any SPI devices in /dev (which is what I naively expect).

And there's https://github.com/torvalds/linux/blob/master/drivers/spi/spi-rockchip.c, which seems to be the SPI config for the underlying chip. And this, https://github.com/torvalds/linux/blob/master/drivers/spi/spidev.c , which is the definition of spidev which (again naively) I expected to use with the generic devices I'm aiming to use. spiidev might be hacky, but many code examples use it.

So I'm not sure what i need to add...what I'd put in a device tree overlay. I just want to get a Pine64 SOQuartz running SPI in the same (simple) way that a Pi CM4 does.

If there's something I can do to help support this, I would be happy to. But now I'm just confused.

With Plebian, it seems like a great start to be able to use SOQuartz in a fairly normal way as if it was a Pi CM4. But with SPI I'm stuck.

H