disable /dev/video0 and /dev/ttyS* in kernel 5.8.y with device tree

[jslav]

In recent armbian for orangepi-pc (Fossil 5.8.y) I encountered /dev/video0 and /dev/video1

I disabled both video and csi devices in dtb, but /dev/video0 and /dev/video1 did not disappear.

 

Same happened with serial ports also.

In dtb file 4 serial ports are described. Only one port is enabled, but /dev/ ttyS* contains 8 serial devices

 

/proc/device-tree/soc/serial* directory contains exact number of serial ports as it is described in dtb.

 

does anybody have an experience in disabling devices via device tree?

Or the devices are hardcoded in the kernel?

 

 

[martinayotte]

2 hours ago, jslav said:

Or the devices are hardcoded in the kernel?

For video, I don't know ... But for serial, Yes !

 

Doing this command :

grep "=8" /boot/config-*-sunxi

will reveal :

CONFIG_SERIAL_8250_NR_UARTS=8
CONFIG_SERIAL_8250_RUNTIME_UARTS=8

 

[MacBreaker]

@jslav

 

about video*

 

take a look here:

 

Quote

That means that the module sunxi_cedrus and sun8i_di has to be blacklisted...

check the active modules and blacklist them...