Enable SPI with CS0 and CS1

[Christos]

Hi,

 

How can I enable both the CS0 and CS1 on the SPI on OPiPC mainline?

Need to have both spidev0.0 and spidev0.1 drivers concurently available, yet only one of them is enabled and visible.

My armbianEnv.txt

verbosity=1
logo=disabled
console=both
disp_mode=1920x1080p60
overlay_prefix=sun8i-h3
rootdev=UUID=72c69678-cb49-4c08-b5d3-396060e8ff18
rootfstype=ext4
overlays=spi-add-cs1 spi-spidev
param_spidev_spi_bus=0
param_spidev_spi_cs=1
param_spidev_spi_cs=0
param_spidev_max_freq=10000000

usbstoragequirks=0x2537:0x1066:u,0x2537:0x1068:u

 

If the latest param is param_spidev_spi_cs=1 then I get only spidev0.1, if the latest param is param_spidev_spi_cs=0 then I get spidev0.0, but never both of them.

 

Is there any way that I can have both spidev0.0 and spidev0.1 available ?

 

Christos

 

[zador.blood.stained]

32 minutes ago, Christos said:

Is there any way that I can have both spidev0.0 and spidev0.1 available ?

Yes, by adding a custom overlay: https://github.com/armbian/sunxi-DT-overlays/blob/master/examples/spi-double-spidev.dts

You will still need to use spidev-add-cs1 overlay but remove spi-spidev one because the custom one will be used instead of it.

[Christos]

@zador.blood.stained

Thank you, nice to see that.

 

Yet, when I tried to build it, got

~$ sudo armbian-add-overlay spi-double-spidev.dts
Kernel headers are not installed properly. Please install the kernel headers package

The build is a fresh one, mainline next, Ubuntu.

[Christos]

@zador.blood.stained

Ok,

Manually installed the build-produced headers .deb and re-tried to armbian-add-ovelay, it worked ok now and see the two separate devices.

Expected that headers are installed by default and got a bit confused.

 

Thank you.