UCM-iMX95 Yocto Linux: Device trees

Available Device Trees

The current release includes the following dtb files:

Device Tree	Hardware Configuration and Features	Description
ucm-imx95-headless.dtb	default hardware configuration
ucm-imx95.dtb	ucm-imx95-headless.dtb ucm-imx95-lvds.dtbo	headless +lvds

Set a device tree

The current release provides two methods to switch between dtb files:

• U-Boot environment

The U-boot fdtfile variable contains the device tree name that will be loaded into the RAM. This variable can be changed by:

Environment	Command
U-Boot	setenv fdtfile <fdt_file_name>; saveenv;
Linux	fw_setenv fdtfile <fdt_file_name>

• GRUB environment (if the image was created with the meta-compulab-uefi layer)

Environment	Command/Procedure
GRUB Boot Menu	Goto "Advanced Boot Options" and choose a device tree from the provided dtb list.
Linux	grub-editenv /boot/EFI/BOOT/grubenv set fdt_file=<fdt_file_name>